Sol–gel synthesis of SnO2–MgO nanoparticles and their photocatalytic activity towards methylene blue degradation

Sol–gel synthesis of SnO2–MgO nanoparticles and their photocatalytic activity towards methylene blue degradation:

Highlights

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A simple sol–gel method for the synthesis of SnO₂–MgO nanoparticles is reported.

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Band gap of SnO₂ can be tuned by varying the magnesium content in SnO₂–MgO.

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SnO₂–MgO shows good photocatalytic activity towards degradation of methylene blue.

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Influence of In doping on the structural, photo-luminescence and alcohol response characteristics of the SnO2 nanoparticles

Influence of In doping on the structural, photo-luminescence and alcohol response characteristics of the SnO2 nanoparticles:

Highlights

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In-doped SnO₂ samples show smaller crystallinity with crystallite size: ∼7–9 nm.

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EDX analyses confirm the incorporation of indium ions in the SnO₂ lattice.

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Raman spectra are consistent with the results of XRD and SAED pattern.

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Alcohol response has been found to increase with the indium dopant concentration.

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3 at% In-doped sample exhibits maximum response (96.5%) to propan-2-ol at 250 °C.

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Effects of Sn addition on phase formation and mechanical properties of TiCu-based bulk metallic glass composites

Effects of Sn addition on phase formation and mechanical properties of TiCu-based bulk metallic glass composites:

Highlights
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Effects of Sn on mechanical properties of TiCu-based BMG composites were studied.
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Formation of brittle CuTi2 and ZrTiCu2 intermetallic compounds were suppressed.
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Excessive Sn addition deteriorated glass forming ability.
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Large plasticity and strong work-hardening in the BMG composites were obtained.
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Related mechanisms for the enhanced properties were discussed.
Abstract
A unique combination of macroscopic properties including high strength, large plasticity and strong work-hardening behavior was realized in TiCu-based bulk metallic glass (BMG) composite with proper addition of Sn. It was found that proper addition of Sn induced formation of BMG composites consisting of a single B2-TiCu phase via suppressing precipitation of the brittle CuTi2 and ZrTiCu2 intermetallic compounds. With excessive Sn addition, however, glass forming ability of the resultant alloys was severely decreased due to formation of additional Zr5Sn3 phase. Moreover, desirable elastic mismatch (e.g., Young's modulus and hardness) between the reinforcing crystalline phase and amorphous matrix, resulted from the Sn addition, remarkably accommodated large plasticity and strong work-hardening capability of the current BMG composites.

http://www.sciencedirect.com/science/article/pii/S0966979513001477

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Synthesis of Cu2ZnSnS4 films from co-electrodeposited Cu-Zn-Sn precursors and their microstructural and optical properties

Synthesis of Cu2ZnSnS4 films from co-electrodeposited Cu-Zn-Sn precursors and their microstructural and optical properties:

Highlights
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A novel electrolyte formula and co-electrodeposition parameters are presented.
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The CZTS films are prepared from co-electrodeposited precursors.
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CZTS film forms by reaction among binary and ternary sulfides at high temp.
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Photoluminescence was obtained from prepared CZTS films at 550 °C for 1 h.
Abstract
The Cu2ZnSnS4 (CZTS) films were successfully prepared using a process of co-electro-deposition of Cu-Sn-Zn precursors by a novel electrolyte formula and optimized parameters on Mo substrates, succeeded by annealing in saturated sulfur atmosphere. The optimized electrolyte formula was achieved as 0.16 M CuSO4·5H2O, 0.33 M ZnSO4, 0.08 M SnCl2·2H2O, 2.25 M NaOH, 1.36 M C6H5Na3O7 and 1.00 M C4H6O6 under a voltage of -1.62 V for 5 min. Cu3Sn, Cu6Sn5 and Cu4Zn alloys were firstly synthesized at temperature lower than 300 °C. At 300 °C, these alloys decomposed in sulfur atmosphere and CuS, SnS and ZnS binary phases were formed. Ternary Cu4SnS6 formed through reaction between CuS and SnS above 350 °C. Finally, the CZTS films were synthesized through reaction among CuS, SnS, ZnS and Cu4SnS6 sulfides. CZTS films synthesized at 550 °C for 1 h had an average atomic ratio of 0.96 and 1.1 for Cu/(Zn + Sn) and Zn/Sn, respectively. The photoluminescence peaking at about 1.55 eV in the prepared samples demonstrated a high quality of the CZTS film.

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COATED ARTICLE WITH LOW-E COATING INCLUDING TIN OXIDE INTERLAYER

Espacenet A coated article is provided which may be heat treated (e.g., thermally tempered) in certain instances. In certain example embodiments, an interlayer of or including a metal oxide such as tin oxide is provided under an infrared (IR) reflecting layer so as to be located between respective layers comprising silicon nitride and zinc oxide. It has been found that the use of such a tin oxide inclusive interlayer results in significantly improved mechanical durability, thermal stability and/or haze characteristics.

     US2013108848  (A1)  -  COATED ARTICLE WITH LOW-E COATING INCLUDING TIN OXIDE INTERLAYER
Inventor(s):     NUNEZ-REGUEIRO JOSE [US]; DIETRICH ANTON [CH]; LINGLE PHILIP J [US]; THOMSEN SCOTT V [US]; WANG HONG [CN]; LEMMER JEAN-MARC [US]; BASSETT NANCY [US]; CORSNER BRYCE [US] +
Applicant(s):     GUARDIAN INDUSTRIES [US]; GUARDIAN INDUSTRIES [US] +

Elaboration and high resolution TEM characterization of SnO2 nanowires

ScienceDirect.com - Microelectronic Engineering - Elaboration and high resolution TEM characterization of SnO2 nanowires:

Tin dioxide is a wide-band gap (3.6 eV) semiconductor with numerous potential applications in batteries, gas sensors, and dye-sensitized solar cells. In this study nanocrystalline tin oxide nanowires have been synthesized by electrochemical deposition and oxidation in anodic aluminum oxide template. Electrochemical synthesis has been controlled by chronoamperometry and oxidation by X-ray diffraction. Polycrystalline nanowires with 140 nm in diameter and 3 μm in length have been obtained. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies have highlighted a uniform nanowire structure. High resolution transmission electron microscope (TEM FEI Tecnai G2-20 twin) was employed to characterize the crystalline structure of 5 nm diameter tin oxide grains. Tetragonal tin oxide phase has been characterized by X-ray powder diffraction and the interplanar distance of 0.32 nm corresponding to the SnO2 crystal obtained by HRTEM has confirmed the structure.

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ScienceDirect.com - Materials Science in Semiconductor Processing - Effect of annealing on structural, optical and electrical properties of pulse electrodeposited tin sulfide films

ScienceDirect.com - Materials Science in Semiconductor Processing - Effect of annealing on structural, optical and electrical properties of pulse electrodeposited tin sulfide films:

Polycrystalline tin sulfide (SnS) thin films were grown on conducting glass substrates by pulse electrodeposition. The effect of annealing on the physical properties such as structure, morphology, optical, and opto-electronic properties were evaluated to understand the effect of post-deposition treatment for SnS films. Annealing at temperatures higher than 250 °°C resulted in the formation of SnS2 as a second phase, however, no significant grain growth or morphological changes were observed for films after annealing at 350 °C. A small change in band gap of 0.1 eV observed for films annealed at 350 °C was interpreted as due to the formation of SnS2 rather than due to morphological changes. This interpretation was supported by X-ray diffractometry, scanning electron microscopy, and Raman spectral data. The electric conduction in the films is controlled by three shallow trap levels with activation energies 0.1, 0.05, and 0.03 eV. The trap with energy 0.03 eV disappeared after annealing at higher temperature, however, the other two traps were unaffected by annealing.


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ScienceDirect.com - Materials Science in Semiconductor Processing - Controlling the diameter of silicon nanowires grown using a tin catalyst

Materials Science in Semiconductor Processing - Controlling the diameter of silicon nanowires grown using a tin catalyst:
Silicon nanowires were grown on ITO-coated glass substrates via a pulsed plasma enhanced chemical vapor deposition method, using tin as a catalyst. The thin films of catalyst, with different thicknesses in the range 10–100 nm, were deposited on the substrates by a thermal evaporation method. The effect of the thickness of the thin film catalyst on the morphology of the silicon nanowires was investigated. The scanning/transmission electron microscopy images showed that the wire diameter increased as the thickness of the thin film catalyst increased. The nanowires grown using a thin film thickness of 10 nm were inhomogeneous in diameter, whereas the other thicknesses led to an increase in the homogeneity of the diameters of the nanowires. The dominant wire diameter of the grown silicon nanowires ranged from 70 to 80 nm with 10 nm catalyst thin film thickness, and increased to a range of 190–200 nm with 100 nm catalyst thin film thickness.
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ScienceDirect.com - Materials Science and Engineering: B - The fabrication of SnSe/Ag nanoparticles on TiO2 nanotubes

ScienceDirect.com - Materials Science and Engineering: B - The fabrication of SnSe/Ag nanoparticles on TiO2 nanotubes:

SnSe and silver (Ag) nanoparticles were sequentially deposited on TiO2 nanotube (NT) by pulsed electrochemical deposition and polyol chemistry process, respectively. The morphological observation under scanning electron microscope (SEM) showed that the average size of SnSe was about 30 nm and the Ag was about 5 nm. Transmission electron microscopy (TEM) combined with selected area electron diffraction (SAED) examination indicated that Ag nanoparticles exhibited a well-defined crystallinity. However, SnSe nanoparticles were amorphous and they turned to crystalline after being annealed at 300 °C in the atmosphere. The photocatalytic behavior of SnSe/Ag-TiO2 NT was evaluated by UV–vis diffuse reflectance spectra (DRS). The results showed that the deposition of SnSe and Ag nanoparticles increased light absorption intensity in the wavelength range of visible light, which implied that the SnSe/Ag-TiO2 NT is a promising ternary hybrid material in photocatalysis.


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Novel SnO2 hierarchical nanostructures: Synthesis and their gas sensing properties

ScienceDirect.com - Materials Letters - Novel SnO2 hierarchical nanostructures: Synthesis and their gas sensing properties:

In this work, 3D SnO2 with a hierarchical structure, which was built by numerous one-dimensional tetragonal prism nanorods, had been firstly synthesized by a facile one-step hydrothermal route at 200 °C in the presence of cetyltrimethylammonium bromide (CTAB). The cationic surfactant CTAB played a key role in forming the 3D SnO2 hierarchical structure composed of nanorods. In addition, the novel SnO2 hierarchical structure exhibited good gas-sensing properties. The gas sensor showed good selectivity to ethanol gas. Moreover, a linear dependence of the sensitivity on the ethanol concentration was observed, it suggested that the sensor fabricated by SnO2 hierarchical structures is very suitable to detect ethanol with low concentration.

Highlights
► 3D SnO2 with a hierarchical structure had been synthesized by hydrothermal method.► The novel SnO2 hierarchical structure exhibited good gas-sensing properties. ► The reason of the sensing response enhancement has been discussed in the paper.

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ScienceDirect.com - Journal of Power Sources - Tin and Graphite based Nanocomposites: Potential Anode for Sodium Ion Batteries

ScienceDirect.com - Journal of Power Sources - Tin and Graphite based Nanocomposites: Potential Anode for Sodium Ion Batteries:

Tin and Graphite based Nanocomposites: Potential Anode for Sodium Ion Batteries

• Moni Kanchan Datta, 
• Rigved Epur, 
• Partha Saha, 
• Karan Kadakia, 
• Sung Kyoo Park, 
• Prashant N. Kumta

Pure tin (Sn) and a homogeneous nanocomposite of tin and graphite (C), denoted as Sn/C, have been studied as a suitable anode for sodium ion batteries. The Sn/C mixture and nanocomposites have been synthesized by high energy mechanical milling (HEMM) of pure Sn and graphite of nominal composition C-70 wt.% Sn. Pure microcrystalline Sn (≤44μm) exhibits a 1st discharge capacity ∼856mAh/g which is close to the expected theoretical capacity, however, it shows a large 1st cycle irreversible loss (∼67%) and the anticipated inevitable rapid fade in capacity expectedly due to structural failure of the electrode. On the other hand, the resultant Sn/C based mixture, synthesized by HEMM after 1h of milling, exhibits a 1st cycle discharge capacity ∼584mAh/g with a 1st cycle irreversible loss ∼30%. The Sn/C mixture shows a 1st cycle charge capacity of ∼410 mAh/g with improved capacity retention in comparison to pure Sn displaying 0.7% fade in capacity per cycle up to 20 cycles when cycled at a rate of ∼C/8. Scanning electron microscopy (SEM) analysis indicates that the structural integrity and microstructural stability of the Sn/C mixture during the alloying/dealloying processes appear to be the primary factors contributing to the good cyclability observed in the above HEMM derived mixture suggesting its promise as a potential anode for Na-ion systems.


Journal of Power Sources
Available online 16 October 2012


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Facile synthesis of self-assembled SnO nano-square sheets and hydrogen absorption characteristics

ScienceDirect.com - Materials Research Bulletin - Facile synthesis of self-assembled SnO nano-square sheets and hydrogen absorption characteristics:

Stannous oxide is an important functional material which contributes to a wide range of applications in energy storage and optoelectronic devices. In the present study, the single crystalline self-assembled stannous oxide (SnO) 2D nano-square sheets have been synthesized with template-free hydrothermal growth method. The morphology, composition and structure were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) with selected area electron diffraction (SAED), energy dispersive X-ray (EDX), X-ray diffraction (XRD) and Raman spectroscopy, respectively. FESEM results have illustrated that the size of self-assembled 3D hierarchical polygon-shape structure of SnO is in the range of 8–12 μm and the average size of the nano-square sheets is about 100 nm. X-ray diffraction (XRD) and selected area electron diffraction (SAED) patterns have revealed that the prepared SnO nano-square sheets exist in single-crystalline nature. Two Raman modes A1g = 211 cm−1 and B1g = 113 cm−1 were observed by Raman spectroscopy, which is consistent with nano tetragonal phase SnO. Furthermore, the chemical valence of Sn and relative atomic composition of as-prepared SnO have been confirmed by X-ray photoelectron spectroscopy (XPS). Ultraviolet–visible–near infrared spectrophotometry was used to study the transmittance behavior of SnO nano-structures and direct optical band gap of 3.16 eV was acquired by using Davis–Mott model. The first ever study on hydrogen absorption characteristics of SnO nano-square sheets performed at 373 K shows good absorption capacity of 1.194 wt.%.

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A single-source precursor route to Ag/SnO2 heterogeneous nanomaterials and its photo-catalysis in degradation of Conco Red

ScienceDirect.com - Materials Research Bulletin - A single-source precursor route to Ag/SnO2 heterogeneous nanomaterials and its photo-catalysis in degradation of Conco Red:

Ag/SnO2 heterogeneous material was obtained via directly decomposing single-source precursor Ag2SnO3 at temperature of 400 °C, owing to the in situ growth from the decomposition. This kind of heterogeneous structure was helpful to improve the photocatalysis efficiency. When Ag/SnO2 heterogeneous material was employed as photocatalysts in the degradation of Conco Red, its catalytic efficiency is 3-fold that of the mixture of Ag and SnO2 powders.


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High-yield synthesis of SnO2 nanobelts by water-assisted chemical vapor deposition for sensor applications

ScienceDirect.com - Materials Research Bulletin - High-yield synthesis of SnO2 nanobelts by water-assisted chemical vapor deposition for sensor applications:

Well-crystallized one-dimensional (1D) SnO2 nanobelts were in situ prepared using a simple water-assisted chemical vapor deposition (CVD) method. The small Sn particles with Au-modifications were used as source materials instead of big size Sn grains to ensure the high yield of SnO2 belts. The Au layer was modified on the small Sn particles by treating Sn powders in HAuCl4 solution combined with the UV irradiation. The as-prepared SnO2 nanobelts were characterized by SEM, HRTEM, XRD, EDS and XPS. These results indicate that the growth temperature plays an important role in controlling the length-to-width ratio of nanobelts. The length-to-width ratio decreases with the growth temperature from 850 °C to 1000 °C. The nanobelts prepared at 850 °C shows a single-crystalline tetragonal rutile phase with a high length-to-width ratio (approximately tens of microns in length and 40–70 nm in width). However, below 850 °C, nanobelts cannot be formed. The as-prepared nanobelts exhibited excellent sensing properties compared with SnO2 nanoparticles and high sensing selectivity towards NO2. The high sensing selectivity to NO2 is attributed to the oxygen vacancies presenting in the as-prepared nanobelts.

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Cu2ZnSnS4 thin films deposition by ultrasonic spray pyrolysis

Cu2ZnSnS4 (CZTS) thin films were deposited by ultrasonic spray pyrolysis technique. The substrate temperature was varied from 280 to 360 °C in order to investigate its influence on CZTS films properties. The deposition rate shows two activation energies 0.16 and 0.53 eV, respectively at low and high substrate temperatures. This indicates that CZTS deposition by spray pyrolysis passes by two different processes with increasing temperature substrate. The temperature 320 °C corresponds to the transition between these two processes. The X rays diffraction (XRD) analysis indicated that the deposited films have a kesterite hexagonal structure with (1 1 2) preferential orientation and a crystalline size, ranged from 30 to 52 nm with increasing substrate temperature. Stannate ZnSnO3 is present as a secondary phase. The presence of this secondary phase causes films optical band broadening. Broad emissions at around 1.27 eV was observed in the photoluminescence spectrum measured at 77 K, it is accompanied with a small peak located at 1.75 eV due the presence of zinc stannate phase ZnSnO3.


ScienceDirect.com - Journal of Alloys and Compounds - Cu2ZnSnS4 thin films deposition by ultrasonic spray pyrolysis:

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A facile and low cost synthesis of earth abundant element Cu2ZnSnS4 (CZTS) nanocrystals: Effect of Cu concentrations

Abstract
Cu2ZnSnS4 (CZTS) nanocrystals (NCs) were synthesized by sulfurization of microwave assisted precursor powders without toxic chemicals. The effects of different Cu concentration from 0.01 to 0.025 M on the structural, morphological, compositional, chemical and optical properties of CZTS NCs were investigated. X-ray diffraction patterns, X-ray photoelectron spectroscopy and transmission electron microscopy results showed that the precursor powder contains several broad peaks that could not be assigned to CZTS, ZnS, Cu2-xS, Sn2S3 and Cu2SnS3. However, the sulfurized NCs showed both kesterite CZTS and Cu- and Sn-based secondary phases except for that formed at Cu concentration of 0.02 M. Inductively coupled plasma (ICP) results showed that the presence of Cu in the sulfurized CZTS NCs increased with increasing Cu concentration from 16.57 to 32.94 at.% while Zn and Sn in the sulfurized CZTS NCs decreased with increasing Cu concentration. UV–Vis spectroscopy results showed that the absorption coefficient of the sulfurized NCs was over 104 cm−1 in the visible region and band gap energy of the sulfurized CZTS NCs decreased from 1.65 to 1.28 eV with increasing Cu concentration.

Highlights
► Cu2ZnSnS4 (CZTS) nanocrystals (NCs) were prepared by sulfurization of microwave assisted precursor without toxic chemicals. ► Effect of Cu concentration on the properties of CZTS NCs was investigated using various analysis methods. ► The properties of CZTS NCs was strongly related to the Cu concentrations.



Seung Wook Shin (a), Jun Hee Han (a), Chan Yeong Park (b), Sae-Rok Kim (b), Yeon Chan Park (b), G.L. Agawane (b), A.V. Moholkar (c), Jae Ho Yun (d), Chae Hwan Jeong (e), Jeong Yong Lee (a), Jin Hyeok Kim (b)
a Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, South Korea
b Photonics Technology Research Institute, Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-Dong, Buk-Gu, Gwangju 500-757, South Korea
c Electrochemical Mat. Lab, Department of Physics, Shivaji University, Kolhapur 416-004, India
d Photovoltaic Research Group, Korea Institute of Energy Research, 71-2 Jang-Dong, Yuseong-Gu, Daejeon 305-343, South Korea
e Solar City Center, Development of Advanced Components & Materials Korea Institute of Industrial Technology, Gwangju 500-480, South Korea



Journal of Alloys and Compounds
Volume 541, 15 November 2012, Pages 192–197


ScienceDirect.com - Journal of Alloys and Compounds - A facile and low cost synthesis of earth abundant element Cu2ZnSnS4 (CZTS) nanocrystals: Effect of Cu concentrations:

Martensitic transition of Mn-rich Pd–Mn–Sn alloy

Abstract
A new magnetic shape memory alloy Pd2Mn1.46Sn0.54 has been synthesized. It was found that in the austenite phase Pd2Mn1.46Sn0.54 crystallizes in the L21 structure. It was confirmed from the low temperature X-ray diffraction measurements that the martensite phase of Pd2Mn1.46Sn0.56 has an orthorhombic four-layered structure. The magnetization versus temperature curve of Pd2Mn1.46Sn0.54 is very similar to those of the Ni–Mn–Z (Z = In, Sn and Sb) magnetic shape memory alloys; the paramagnetic–ferromagnetic transition appears in the austenite phase with decreasing temperature. With further decrease of temperature, the magnetization and permeability decrease abruptly at the martensitic transition temperature. The martensite phase remains ferromagnetic at low temperatures.

Highlights
► This is the first report of clear evidence of the martensitic transition in Pd–Mn–Sn new material. ► Pd2Mn1.46Sn0.54 exhibits martensitic transition from ferromagnetic L21 phase to paramagnetic 4O phase. ► A smaller magnetic moment of Pd than that of Ni for other Ni-based shape memory alloys is suggested.



T. Kanomata (a, b), Y. Chieda (a), H. Okada (a), H. Nishihara (c), A. Kimura (d), M. Nagasako (b), R.Y. Umetsu (e), R. Kainuma (b), K.R.A. Ziebeck (f)
a Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan
b Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
c Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan
d Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
e Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
f Department of Physics, Cavendish Laboratory, University of Cambridge, CB3 0HE, UK



Journal of Alloys and Compounds
Volume 541, 15 November 2012, Pages 392–395


ScienceDirect.com - Journal of Alloys and Compounds - Martensitic transition of Mn-rich Pd–Mn–Sn alloy:

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Studies of CoSn grains in the carbon matrix structure of nanostructured tin–cobalt–carbon

Small angle neutron scattering (SANS) and transmission electron microscopy (TEM) have been used to qualitatively analyze the structure of Sn30Co30C40 alloys produced by vertical axis mechanical attriting to those produced by magnetron sputter deposition. From SANS and TEM, CoSn grains embedded in a carbon matrix structure were observed for all samples. The size of CoSn grains in the attrited samples was approximately 10 ± 3 nm by both TEM and SANS, while that of the sputtered samples was about 7 times smaller.

Highlights
► Sn–Co–C alloys as negative electrode for Li-ion batteries. ► Sn–Co–C alloys prepared by mechanical alloying and by sputtering. ► CoSn grains embedded in carbon matrix structure was observed from SANS and TEM. ► SANS quickly characterized Sn–Co–C alloys equivalently to TEM.


P.P. Ferguson (a), M.D. Fleischauerb (b), J.M. LaForge (c), A.D.W. Todd (d), P. Li (b), J.R. Dahna, (e),
a Dept. of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada B3H 3J5
b NRC, National Institute for Nanotechnology, Edmonton, AB, Canada T6G 2M9
c Dept. of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada T6G 2V4
d NRC Institute for National Measurements Standards, Ottawa, ON, Canada K1A 0R6
e Institute for Research in Materials, Dalhousie University, Halifax, NS, Canada B3H 3J5


Journal of Alloys and Compounds
Volume 541, 15 November 2012, Pages 168–172

http://www.sciencedirect.com/science/article/pii/S0925838812012339

Enhanced ethanol sensing properties of Zn-doped SnO2 porous hollow microspheres

Zn-doped SnO2 porous hollow microspheres with an average diameter of ∼180 nm have been prepared by a direct precipitation method using colloidal carbon sphere as template. The XRD data disclosed that the structure of the Zn-doped SnO2 microspheres was the same as pure SnO2, while the crystallite size of Zn-doped SnO2 microspheres (10.63 nm) was smaller than SnO2 (23.2 nm). The sensing measurement showed that the response (Ra/Rg) increased near linearly with the ethanol gas concentration at the operating temperature of 240 °C. Compared with SnO2 microspheres, Zn-doped SnO2 porous hollow spheres exhibited a significant improvement for the response towards ethanol at 240 °C. The response of Zn-doped SnO2 microspheres was up to 3 when the sensor was exposed to 2 ppm C2H5OH, with the response and recovery times of 7 and 4 s, respectively. Additionally, the response of Zn-doped SnO2 sensor showed slight variation after 15 weeks storage. The results indicated that Zn-doped SnO2 microspheres are of great potential for fabricating C2H5OH sensors with high performance.


Applied Surface Science
Available online 4 September 2012

In Press, Accepted Manuscript — Note to users

Wenchuang Wang, Yongtao Tian, , Xinjian Li, Xinchang Wang, Hao He, Yurui Xu, Chuan He
Department of Physics and Laboratory of Material Physics, Zhengzhou University, Zhengzhou 450052, P. R. China


ScienceDirect.com - Applied Surface Science - Enhanced ethanol sensing properties of Zn-doped SnO2 porous hollow microspheres:

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A highly selective fluorescence sensor for Tin (Sn 4+) and its application in imaging live cells

Scopus: A naphthalimide-rhodamine B derivative was synthesized as a fluorescence turn-ON chemodosimeter for Sn 4 . A colour change and marked enhancement of fluorescence was found in the presence of Sn 4 , Cu 2 and Cr 3 due to the ring open reaction of rhodamine and a fluorescence resonance energy transfer process. Addition of the strong chelating agent ethylenediaminetetraacetic acid disodium salt (EDTA) partly released the cation from the complex with Sn 4 and restored the yellow fluorescence. In addition, the compound can be used as a fluorescent probe for Sn 4 in biological systems and may act as a tool with which to study the physiological functions of tin or pathogenesis in the human body


Organic and Biomolecular Chemistry
Volume 10, Issue 33, 7 September 2012, Pages 6740-6746
A highly selective fluorescence sensor for Tin (Sn 4+) and its application in imaging live cells
Wang, Q., Li, C., Zou, Y., Wang, H., Yi, T. , Huang, C.  
Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, China