SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Lianfeng Zhu,Mengyun Wang,Tsz Kwan Lam,Changyue Zhang,Hongda Du,Baohua Li,Youwei Yao
Tin oxide (SnO 2 ) quantum dots (QDs) have been prepared by microwave-assisted method. Firstly, through microwave-assisted method, organic component-wrapped SnO 2 QDs with size of ca. 2–4 nm can be synthesized in only 0.5 min at 160 °C. Then, SnO 2 of very good crystallinity and ca. 5–10 nm can be obtained by annealing the organic component-wrapped SnO 2 QDs in air at 400 °C for 4 h. The annealed SnO 2 QDs exhibit excellent gas sensitivity towards ethanol vapor. Typically, the relative resistance, i.e., ratio of resistance of sample in air to that in tested gases, of sensors towards 300 ppm of ethanol vapor is 215.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Wei Sun,Xiuzheng Wang,Yuhua Wang,Xiaomei Ju,Li Xu,Guangjiu Li,Zhenfan Sun
In this paper a nanocomposite prepared by graphene (GR) and SnO 2 nanosheets was used to modify a N-hexylpyridinium hexafluorophosphate based carbon ionic liquid electrode. The presence of GR–SnO 2 nanocomposite on the electrode surface exhibited synergistic effects to improve the electrochemical performance of the modified electrode . Electrochemical behaviors of dopamine (DA) on the electrode were evaluated by cyclic voltammetry and differential pulse voltammetry . The results indicated that the GR–SnO 2 nanocomposite modified electrode displayed high electrocatalytic activity to the oxidation of DA with the increase of the redox peak currents and the decrease of the peak-to-peak separation. Under the selected conditions the oxidation peak current was proportional to the DA concentration in the range from 0.5 to 500.0 μmol/L with a detection limit of 0.13 μmol/L (S/N = 3). The modified electrode showed excellent selectivity and sensitivity even in the presence of high concentration of uric acid . The proposed method was applied to determine DA content in real samples with satisfactory results.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·1025
·
IF 3.504
Dongping Xue,Yan Wang,Jianliang Cao,Zhanying Zhang
Developing the triethylamine sensor with excellent sensitivity and selectivity is important for detecting the triethylamine concentration change in the environment. In this work, flower-like CeO2-SnO2composites with different contents of CeO2were successfully synthesized by the one-step hydrothermal reaction. Some characterization methods were used to research the morphology and structure of the samples. Gas-sensing performance of the CeO2-SnO2gas sensor was also studied and the results show that the flower-like CeO2-SnO2composite showed an enhanced gas-sensing property to triethylamine compared to that of pure SnO2. The response value of the 5 wt.% CeO2content composite based sensor to 200 ppm triethylamine under the optimum working temperature (310 °C) is approximately 3.8 times higher than pure SnO2. In addition, CeO2-SnO2composite is also significantly more selective for triethylamine than pure SnO2and has better linearity over a wide range of triethylamine concentrations. The improved gas-sensing mechanism of the composites toward triethylamine was also carefully discussed.Keywords:CeO2-SnO2;nanostructure;hydrothermal;triethylamine;gas sensor
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 84
·68953-68963
·
IF 3.84
Xi Chen,Banghong Zhou,Shuanglei Yang,Hanshuo Wu,Yuxin Wu,Laidi Wu,Jun Pan,Xiang Xiong
Herein, a strong heterojunction, consisting of SnO2 nanoparticles grown on layered g-C3N4 nanosheets, was rationally designed and successfully synthesized via a facile hydrothermal method. The morphology, chemical structure, optical and electronic properties of the obtained SnO2/g-C3N4 hybrid nanocomposites were characterized. Furthermore, the photocatalytic activity of the novel photocatalysts was assessed. The results clearly indicate that the SnO2/g-CN-72.12% nanocomposite photocatalysts shows a stable cycle performance and exhibits significantly enhanced photocatalytic activity, which is 89 and 17 times higher than those of pure SnO2 and g-C3N4, respectively. The synergistic effect of the SnO2/g-C3N4 heterojunction can effectively accelerate the separation of photo-generated carriers and enhance the efficiency of interfacial charge transfer, which are proposed to be responsible for the enhancement of the photocatalytic activities. This study provides a low-cost and large-scale synthesis route for the production of visible light responsive photocatalysts that have potential in environmental purification applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Peng Wang,Tong Song,Guanggang Gao,Katarzyna Matras-Postolek,Ping Yang
SnO 2 clusters were embedded in superior thin TiO 2 nanosheets to form heterostructures via a two-step solvothermal synthesis . Superior thin TiO 2 (B) nanosheets were firstly prepared, in which these nanosheets exhibited homogeneously sheet structure without aggregation. After deposition of SnO 2 clusters, the mixture phase consisted of anatase and TiO 2 (B) was obtained even though the nanosheet morphology remained unchanged. The ratio of SnO 2 and TiO 2 was adjusted to get enhanced gas sensing performance. The gas sensing activity of samples for volatile organic compounds including acetone, ethanol and triethylamine was tested. Results indicates that SnO 2 /TiO 2 heterostructure with an optimal SnO 2 weight ratio of 10% is remarkably responsive to acetone, ethanol and triethylamine . Especially, the response time to triethylamine is only 10 s. In the case of 2 ppm, the sample still revealed a significant response to triethylamine. The enhanced sensing performance has to ascribed to the significant increase of reactive active sites by loading SnO 2 clusters. In addition, ultra-thin morphology and mixed phase composition of TiO 2 also enhance the property of the composite. This work supplied an idea for the preparation of SnO 2 based gas sensors.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shuo Yu,Caixia Huo,Kui Hao,Le Sun,Yuqing Peng,Aijun Li
We report a novel mild self-assembly freeze–thaw strategy for fabricating 3D graphene aerogel (GA) composite anchored with SnO 2 nanoparticles. Compared with conventional hydrothermal and freeze-drying methods, The method achieves energy-efficient synthesis (90 °C, 3 h) and eliminates complex equipment. Efficient dispersion of SnO 2 nanoparticles and precise modulation of the 3D porous structure were achieved through the synergistic effects of self-assembly, foaming, and in-situ reduction at low temperature and atmospheric pressure. The unique structure of GA/SnO 2 composites significantly buffers the volume expansion of SnO 2 and enhances the ion/electron transport kinetics. As a sodium-ion battery anode, it provides a high reversible capacity of 302.5 mAh g −1 after 300 cycles at 0.1 A g −1 and a remarkable rate capability (146 mAh g −1 at 2 A g −1 ), outperforming aggregated SnO 2 synthesized via hydrothermal routes. DFT simulations reveal enhanced sodium-ion adsorption energy and interfacial C Sn O covalent bonding, which synergistically stabilize the electrode structure. This work provides a low-cost and environmentally friendly route for designing high-performance metal oxide/carbon composites.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS ES&T Engineering
·
2024
·
IF 7.4
Peijin Zou,Zhuangzhuang Ma,Zihuan Tang,Xiaotong Gao,Xiaoxiong Hou,Lichao Jia
Achieving the real-time detection of hydrogen sulfide (H2S) based on metal oxide semiconductor (MOS) gas sensors is of great significance for rapid disease diagnosis. However, the high-power consumption and poor selectivity severely limit its practice application. In this study, a platinum nanoparticle (Pt NPs)-loaded porous metal–organic framework (MOF)-derived SnO2 material was successfully synthesized to optimize the H2S-sensing performance at room temperature. The optimized Pt-loaded porous SnO2-based gas sensor exhibited remarkably high sensitivity (712–10 ppm), fast response (21 s), good selectivity, and extremely low detection limit for H2S (10 ppb) at room temperature. The in-depth analysis demonstrated that the porous structure of Sn-MOF can provide adequate active reaction sites for gas molecules. Moreover, the uniform distribution of surface-loaded Pt NPs can initiate electron and chemical sensitization effects, thereby improving the sensing performance. The successful application of Pt NPs provides a novel approach to improve the room-temperature (RT) sensing performance of metal-oxide-semiconductor-based gas sensors.
研究领域:
材料科学
·
医学诊断
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 1
·244-250
·
IF 2.019
Du Liting,Li Yu,Li Shouchun,Li Haiying,Liu Li,Cheng Yali,Duan Haojie
The hierarchical porous and nonporous SnO 2 microflowers was successfully synthesized by a simple hydrothermal method and followed by calcination procedure. The microstructure and morphology of the product were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, and scanning electron microscopy (SEM). The SEM images display that the prepared SnO 2 is a microflower composed of countless thin sheets, and each of the sheets covered in a series of porous by calcining at 500 °C. Nevertheless, there is no porous when it treated at 400 °C. The results of comparison show that the hierarchical porous SnO 2 microflowers (HPSM) sensors possess a preferable gas-sensing property. The response of HPSM sensors to 100 ppm ethanol is 205.6 at the optimum operating temperature 240 °C. Which sensitivity is almost 3.9 higher than the hierarchical nonporous SnO 2 microflowers (HNSM) (52.9). Meanwhile, the response and recovery times of HPSM (HNSM) are 3 s (3 s) and 45 s (145 s) to 100 ppm ethanol, respectively. What’s more, the minimum concentration of ethanol that we can detect is 0.1 (1.0) ppm, and the response value is 1.9 (2.0). At last, both HPSM and HNSM own a good selectivity.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 32
·期 21
·25725-25734
·
IF 2.22
Wang Ruoming,Bai Pengwei,Zhao Biao,Bai Zhongyi,Guo Xiaoqin,Zhang Rui
In this work, the honeycomb-like SnO 2 with excellent microwave absorbing (MA) capability was successfully prepared by a template method. Furthermore, honeycomb-like SnO 2 configuration with various pore sizes can be prepared by altering the size of polystyrene (PS) nano-sphere. The microstructure, crystallographic structure, elemental chemical state and MA properties of honeycomb-like SnO 2 were measured by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Thermogravimetric-difffferential scanning calorimetry (TG-DSC) and Vector network analyzer (VNA), respectively. Interestingly, the microwave absorption properties were determined by their honeycomb configurations. Furthermore, honeycomb SnO 2 prepared using 148 nm PS spheres as template, presented a minimal RL of −47.4 dB at 11.1 GHz with the layer thickness of 3.2 mm. Meanwhile, the value of RL less than -10 dB was found in the range of 9.8–15.2 GHz. The combination of interfacial polarization, dielectric loss and cellular structure can inhibit the propagation of electromagnetic waves and dissipate microwave energy through heat or other forms. It is believed that the honeycomb-like structures could be expected to be candidates for a new generation of absorbing materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Tongtong Cheng,Yiqi Tang,Heping Zhang,Xingqi Song,Gongcheng Xu,Ying Zhou,Xinghui Hou
SnO 2 is an n-type wide band gap (E g = 3.6 eV) metal oxide semiconductor (MOS) that has been widely studied, due to its low cost, non-toxicity and simple preparation process, and it has become the most important sensitive material for the preparation of gas sensors. However, the SnO 2 sensor still has some defects of high operating temperature and low response, which hinders its practical application. In this work, SnO 2 /SnS composites were prepared by hydrothermally growing SnS nanoparticles on the surface of electrospun hollow SnO 2 nanotubes with high porosity. Results show that the SnO 2 /SnS gas sensor based on the heterojunction has a much higher response of 375 to 50 ppm NO at 130 ℃ than that of pure SnO 2 sensor, as well as rapid response/recovery (26 s/90 s), excellent selectivity (12 times that of H 2 S), repeatability and stability (225–250 to 20 ppm NO). Its enhanced sensing property may be attributed to the synergistic effect of the formation of homologous cations heterojunction and unique micro-structure of SnO 2 /SnS composite, which could facilitate efficient charge transfer and provide more active sites (such as vacancy, point defects) for NO adsorption and reaction. This experiment provides a new idea for the development of SnO 2 gas sensors with excellent properties, which can meet the detection of toxic and harmful gas.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Mingzhu Su,Zitong Feng,Zheng Feng,Hanxiao Chen,Xingyun Liu,Jian Wen,Hongri Liu
Sb 2 S 3 has been proven to be a very promising light absorbing material for photovoltaic applications due to its low cost, high stability, non-toxicity, and abundant elemental storage. Electron transport layer (ETL) is a very crucial factor to the performances of Sb 2 S 3 solar cells. Here we developed a simple chemical solution process method to synthesize SnO 2 colloidal and fabricated SnO 2 ETL at low-temperature first, and then SnO 2 /CdS double ETL was prepared by combining SnO 2 and CdS. The power conversion efficiency of Sb 2 S 3 solar cell is 5.3% based on the SnO 2 /CdS double ETL, whereas the device based on CdS ETL only exhibites a PCE of 4.3%. Experimental analyses revealed that the introduction of SnO 2 ETL enhanced the grain size of Sb 2 S 3 films and passivated interfacial defects thus enhancing device efficiency. Our results show the potential application of SnO 2 in the planar Sb 2 S 3 solar cell.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 5
·866
·
IF 3.4
Zhen He,Chen Yu,Jiaming Liu,Zengcheng Miao,Yuxin Wang
Sb-doped SnO2(SnO2-Sb) coatings show superiority in degrading toxic and refractory organic pollutants. SnO2-Sb coatings can be prepared by oxidizing electrodeposited Sn-Sb coatings through an annealing process. The properties and structure of SnO2-Sb coatings can be tailored by adjusting the preparation parameters. This study examines the effects of crucial preparation parameters on the performance of SnO2-Sb coatings, with the aim of enhancing their properties.Determining the coatings’ cross-sectional and surface characteristics was accomplished using various characterization techniques. A thorough investigation of the prepared samples’ phase and element components was also carried out. Based on the findings, the surface roughness of the prepared Sn-Sb precoating changed with increasing current density, yet the primary surface features of the SnO2-Sb coatings were hardly altered by the annealing process. Without lowering the coating thickness, the appropriate current density of 30 mA/cm2produced a rough and active coating surface. Our study’s proper annealing temperature of 600 °C transformed Sn-Sb precoating into SnO2-Sb coating and achieved excellent coating quality.While changes in the Sb content affected the morphology of the prepared SnO2-Sb coatings, the mixed oxide coatings’ cassiterite SnO2phase was unaffected. These results may provide insights into the optimized use of SnO2-Sb coatings in various applications.Keywords:SnO2-Sb;electrodeposition;structures
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）