Surfaces and Interfaces
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2025
·
IF 6.3
Danyang Wang,Menghan Xu,Kuangyi Li,Yong Yan,Xue Chen,Dongqi Yu,Rongrong Jia,Lei Huang
Ethanol sensors with low energy consumption and high performance have been applied in a wide range of areas. In this work, Pt-modified SnO 2 -TiO 2 composite nanomaterials prepared through ball milling and impregnation-reduction are fabricated for constructing microelectromechanical systems (MEMS) ethanol sensor. Tiny Pt nanoparticles are found uniformly dispersed on SnO₂-TiO₂. High quality gas-sensitive films are concentrated in the functional area of the MEMS chip. The loading of Pt significantly enhances the response to ethanol and reduced the optimal operating temperature. The 1.5% platinum-modified composite (A-ST) demonstrates a significant improvement in sensitivity to 50 ppm ethanol, with its response rising from 21.3 to 52.1, while the optimal operating temperature is reduced by 28°C, dropping from 288°C to 260°C. The limit of detection (LOD) is 240 ppb. This enhancement is primarily due to the n-n junction at the interface between SnO 2 and TiO 2 , along with the chemical and electronic sensitization effects generated by Pt on SnO 2 -TiO 2 .
研究领域:
材料科学
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传感器技术
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纳米科技
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 6
·2991-2998
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IF 0
Lechen Chen,Lizhao Xie,Mozhen Wang,Xuewu Ge
Three-dimensional inverse opal SnO2/graphene (IO-SnO2/graphene) microspheres with a size of several tens of microns are first prepared by a well-designed two-step calcination of polystyrene (PS) colloidal crystal template balls infiltrated with the sol precursors of SnO2 and graphene oxide. The polystyrene colloidal crystal template balls are formed by the self-assembly of monodispersed PS microspheres confined in water droplets of an inverse emulsion induced by the slow evaporation of water. Characterization with scanning electronic microscopy, Raman spectra, X-ray diffraction and X-ray photoelectron spectroscopy proved the ordered macroporous inverse opal composed of crystalline SnO2 and in situ reduced GO during the calcination. The pore size depends on the PS microspheres. The UV-vis diffusive reflectance spectra show that the light absorption edge of the prepared IO-SnO2/graphene microspheres can shift more than 400 nm. The photoluminescence spectra indicates that the IO structure and the introduction of rGO make the charge carriers transfer fast and retard the hole/electron recombination in the IO-SnO2/graphene microspheres so that their photocatalytic performance on the UV photolysis of methyl orange is considerably better than that of commercial SnO2 nanoparticles. However, the photocatalytic performance also depends on the content of GO. The addition of 0.06 wt% of GO achieves the best photocatalytic effect. Excessive GO will result in a diminished catalytic activity. This work provides a way to fabricate a new morphological SnO2 based materials with enhanced photocatalytic activity, which helps in the exploration of new photocatalysts with high performance.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Marimuthu Karpuraranjith,Yuanfu Chen,Xinqiang Wang,Bo Yu,Sivamoorthy Rajaboopathi,Dongxu Yang
It is still challengeable to develop low-cost metal-based photocatalysts with high efficiency and stability for organic pollutant degradation. Herein, we propose a novel “interfacial engineering and suitable band gap matching” strategy to synthesize hexagonal SnSe nanoplate supported SnO 2 -CNTs for highly efficient photocatalytic activity. The CNTs-SnO 2 /SnSe, constructed by SnO 2 nanoparticles homogeneously embedded in carbon nanotube surface, which is anchored on hexagonally crystalline SnSe nanoplates, is synthesized by a facile low-cost and eco-friendly one-pot solvothermal reaction. Compared to SnO 2 , SnSe, CNTs-SnO 2, SnO 2 /SnSe, the CNTs-SnO 2 /SnSe delivers significant performance, enhancement in photocatalytic degradation for aqueous organic dye pollutant under visible light irradiation in 60 min. The k value of CNTs-SnO 2 /SnSe is over 2.2 times larger than CNTs-SnO 2 , SnO 2 and SnSe. The remarkably enhanced photodegradation performance of CNTs-SnO 2 /SnSe is mainly attributed to its unique nanoarchitecture, high surface area and band gap matching: the CNTs skeleton can facilitate the electron transfer; band gap diagram of CNTs-SnO 2 /SnSe is beneficial to efficient electron-hole charge separation and recombination of electron-hole pair can be effectively suppressed. This work presents a rational catalyst design with nanoarchitecture and band gap matching, and a facile one-pot synthesis strategy to synthesize low-cost photocatalysts for dye pollutant degradation with prominent high-efficiency and long-term stability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2017
·Vol. 15
·期 3
·742-750
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IF 1.048
Caihui Feng,Fei Teng,Yang Xu,Yajun Zhang,Tiehu Fan,Tingting Lin
In this work, pure and Au-nanoparticle-decorated SnO 2 nanorods were prepared via a one-step hydrothermal method combined with a facile deposition process, and then characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The xylene-sensing performance of the nanorods was also investigated. The results show that Au nanoparticles with an average diameter of 4-6 nm were immobilized on the surface of rutile SnO 2 nanorods. As the amount of Au increased, the surface-adsorbed oxygen species gradually increased. The 12 mol% Au-SnO 2 nanorods exhibited the highest response to 50 ppm xylene, a lower operating temperature (279 to 255°C), favorable selectivity, and fast response-recovery speed (3 and 4 seconds, respectively). These properties made the fabricated nanorods good candidates for xylene detection. The possible mechanism for the enhanced xylene-sensing performance is discussed.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Zheyan Hu,Sarula Li,Feng Li,Tianqi Wang,Hong Shao,Xiangting Dong
Herein, ZnO-SnO 2 Janus nanofibers (NFs) were synthesized by a parallel electrospinning method and its sensing performances were tested. Considering the compositions of the two metal oxide semiconductors in Janus structure, different ratios of ZnO and SnO 2 were designed and controlled. The optimum ratios of ZnO and SnO 2 was 1:2 by analyzing their sensing performances to triethylamine (TEA) gas. Gas sensors based on ZS-12 Janus NFs exhibited a high response to TEA (45.2) and an excellent sensing response/recovery reproducibility. In order to investigate the sensing mechanism of Janus structure, ZnO NFs and SnO 2 NFs were synthesized and used as controlled experiment. The results indicated that the heterostructures in Janus NFs is the key factor for the enhanced TEA sensing performances. The electrons flowed in the ZnO-SnO 2 Janus structure leading to the variation of ionic oxygen species and electron depletion layer. These phenomena improved the reaction of TEA gas molecules with ionic oxygen species so that the TEA sensing performances were enhanced. Based on the Janus structures, a satisfactory gas sensor for detecting TEA gas were developed. Significantly, this work investigated the sensing mechanism of Janus structures and provided an efficient strategy for the gas sensing materials.
研究领域:
材料科学
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传感器技术
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化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
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2020
·
IF 3.204
Haiyan Zhang,Sen Liu
SnO 2 /Co 3 O 4 n-p heterojunctions have been prepared by organometallic chemistry-assisted approach, where holy Co 3 O 4 nanosheets and (CH 3 ) 2 SnCl 2 were used as precursors. It is found that the surface oxygen-containing species could be regulated by changing the ratio of Co 3 O 4 precursors and Sn-containing organic compound. Our present work is of importance because it provides a new and effective approach for construction of heterojunctions .
研究领域:
材料科学
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化学工程
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纳米技术
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
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2014
·Vol. 16
·期 47
·10863-10869
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IF 3.858
Banghong Zhou,Shuanglei Yang,Wei Wu,Lingling Sun,Mei Lei,Jun Pan,Xiang Xiong
One-dimensional semiconductor heterostructures with unique properties are suited to application in the photocatalysis field. In this study, rationally designed SnO2@TiO2 porous nanowire–nanosheet heterostructures were realized by a facile hydrothermal method via loading TiO2 nanosheets onto SnO2 porous nanowires. One-dimensional porous heterostructures formed via the self-assembly process. Due to the improved photon absorption ability and more active sites, the special heterostructures showed enhanced photocatalytic properties under mixed light, nearly 2.5 times faster than that of SnO2 porous nanowires. Our results suggest that the SnO2@TiO2 porous nanowire–nanosheet heterostructures are promising as photocatalysts.
研究领域:
材料科学
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光催化领域
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
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2015
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IF 1.449
Yibing Lin,Yu Lin,Yongming Meng,Yongguang Tu,Xiaolong Zhang
SnO 2 nanoparticles were synthesized by hydrothermal method and applied to photo-electrodes of quantum dots-sensitized solar cells (QDSSCs). After sensitizing SnO 2 films via CdS quantum dots , CdSe quantum dots was decorated on the surface of CdS/SnO 2 photo-electrodes to further improve the power conversion efficiency. CdS and CdSe quantum dots were deposited by successive ionic layer absorption and reaction method (SILAR) and chemical bath deposition method (CBD) respectively. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to identify the surface profile and crystal structure of SnO 2 photo-electrodes before and after deposited quantum dots. After CdSe co-sensitized process, an overall power conversion efficiency of 1.78% was obtained in CdSe/CdS/SnO 2 QDSSC, which showed 66.4% improvement than that of CdS/SnO 2 QDSSC.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Honglan Huang,Shengzhe Zhao,Yi Yang,Yan Wang,Ran Lu,Yun Lu,Jinju Chen
Axially wrinkled SnO 2 /TiO 2 heteronanotubes have been successfully prepared by sacrificial template method combined with hydrothermal synthesis. The special folded morphology of SnO 2 /TiO 2 nanostructures may provide more active sites, and the S-scheme heterojunction between SnO 2 and TiO 2 enhances the separation of photogenerated electron-hole pairs, which are conducive to the improvement of photocatalytic degradation for organic pollutants. Using SnO 2 /TiO 2 nanotubes as catalyst, the removal rate of Rhodamine B (RhB), methyl orange (MO) and tetracycline hydrochloride (TCH) under the irradiation of a xenon lamp is 93%, 91% and 85%, respectively. After five cycles, the removal efficiency of organic pollutants maintains almost unchanged, indicating that the synthesized SnO 2 /TiO 2 nanotubes has good stability and reusability. In addition, trapping experiments have been carried out to investigate the major reactive oxidative species for organic pollutants photodegradation. This study provides a facile avenue to design nanotublar photocatalysts with enhanced degradation performance for organic pollutants.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yanan Gao,Juncheng Liu,Beiping Dong
Dust on outdoor glass will significantly reduce glass transmittance in various applications and even damage solar cell panels. Here, the effects of Sb doping on the structure and photoelectric properties of a Sb-doped SnO 2 –SiO 2 (ATO-SiO 2 ) film prepared on a glass substrate with a sol-gel method and the dust removal performance of the resulting film were studied. The results show that the Sb-doped SnO 2 –SiO 2 film consists of a SnO 2 tetragonal rutile phase, but the doped Sb decreases the sample crystallinity. With an increase in the Sb doping concentration, two lattice parameters of the ATO-SiO 2 film, a and c , show “M"-shaped changes. The nanoparticle size first decreases and subsequently increases when the Sb doping concentration is over 6 mol%. The transmittance of the substrate glass coated with this film in the visible wavelength range (380–780 nm) decreases from 86.3% to 82.7%. The square resistance first decreases and subsequently increases, while the dust removal performance first increases and subsequently decreases. At a 12 mol% Sb doping concentration, the square resistance is minimal (4.64 × 10 6 Ω/□). The maximal dust removal performance is 64%.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Xiaolin Li,Xueming Li,Wenjing Yang,Xiaohua Chen,Wulin Li,Binbin Luo,Kuilong Wang
The PbO 2 nanospheres supported on SnO 2 nanowires at Ti substrate (PbO 2 nanospheres@SnO 2 NWs/Ti) electrode was successfully synthesized through hydrothermal method. The structure and morphology of the electrode were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical property was carried out by cyclic voltammogrametry (CV) and UV spectroscopy was used to monitor the changes during the electrochemical degradation process. The results showed that the as-prepared electrode exhibited a three-dimensional (3D) reticulated structure with a large surface area. The average diameter of a single PbO 2 nanosphere is about 300 nm. XRD distinctively identified that the PbO 2 nanospheres was mainly composed of tetragonal-shaped β-PbO 2 crystal. The CV results show that methyl orange (MO) can be oxidized on the electrode surface at the potential of +1.3 V vs. Ag/AgCl. As much as 92.7% of chemical oxygen demand (COD) was removed in 60 min at 25 °C and pH 5.0 with an applied current density of 15 mA/cm 2 . Proper degradation mechanism was also proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 48
·7528-7534
·
IF 3.382
Xiao Zhang,Bonan Liu,Yaohua Xu,Hao Liu,Wenrui Zhao,Penghui Wang,Anjie Ming,Feng Wei
Semiconductors are widely used as basic materials in commercial ethanol detection sensors. In this work, SnO2 sensors were modified by a Co doping method to obtain Co-SnO2 for gaseous ethanol detection. For investigating the best sensing performance and elucidating the underlying catalytic mechanism, the effects of the Co/Sn feed ratio and calcination temperature during sample preparation were examined. The sample with a Co/Sn feed molar ratio of 1.0 calcined at 500 °C (D3-Co-SnO2) possessed better ethanol sensitivity than other samples. The best response to 100 ppm gaseous ethanol (i.e., ratio of sensor resistance in air to that in ethanol) was 105.2 at an operating temperature of 350 °C. More importantly, D3-Co-SnO2 achieved a low detection limit of 1 ppm and apparently higher selectivity over various gases (e.g., acetone, hydrogen, methane, etc.). The enhanced sensing performance was attributed to (1) the incorporation of Co atoms, which increased the number of oxygen vacancies and active sites; (2) the catalytic activity of Co(III) and Co(II), which changed the reaction process; and (3) the suitable pore size, which led to effective diffusion of the gas molecules.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）