MATERIALS LETTERS
·
2012
·
IF 2.307
Yong-Qiang Liu,Ge-Bo Pan,Meng Zhang,Feng Li
Micro-patterned composite films consisting of bowl-like tin dioxide (SnO 2 ) microparticles with smooth surfaces and well-defined shapes were prepared by the breath figures method using a homogeneous solution of tin (IV) chloride/polystyrene/chloroform (SnCl 4 /PS/CHCl 3 ). The samples were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The shape and size of SnO 2 microparticles could be adjusted by varying parameters of concentration and relative humidity. A possible mechanism was proposed for illustrating the formation of composite films with bowl-like SnO 2 microparticles. The present strategy for the fabrication of bowl arrays offers new prospects for the application in biosensors, microreactor, and microfluidic devices.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Fei Li,Guang Zhang,Yinghua Song
A simple hydrothermal conversion method for the preparation of Ag 3 PO 4 /SnO 2 composite photocatalyst has been developed. The morphological properties of the nanocomposites are studied using transmission electron microscopy (TEM), energy dispersive spectrometer (EDS), X-ray powder diffraction (XRD) and other methods. Different properties of catalysts are prepared by adjusting the temperature of hydrothermal reaction and the volume ratio. The prepared photocatalyst is tested by degradation of tetracycline solution under visible light show that the degradation rate of tetracycline can reach 74% when the initial [Ag 3 PO 4 ]/[SnO 2 ] molar ratio is 15 and the temperature is 140 ∘ C. Moreover, by constructing Ag 3 PO 4 /SnO 2 composite structure, the impedance and photocurrent of material are enhanced significantly according to the electrochemical characterization.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Xiang-Bing Li,Dan Wang,Cheng Gao,Xiao-le Zhao,Shuang Sun,Ying-ying Ren,Qian-qian Zhang,Jin-bing Zhang,Wen-qiang Dang,Yu-Xiang Zhao,Li-Jun Zhang,Yu-Ping Wang,Li-Min Zhao,Jian-Zhen An,Xue-Fu Kang,Wen-Bo Zhao,Qing Liu
The rough surface Fe 2 O 3 –SnO 2 composite nanorod material was prepared by electrostatic spinning. The morphology and nanostructure of Fe 2 O 3 –SnO 2 composite nanorods were characterized by scanning electron microscopy SEM , nitrogen physical adsorption and X-ray diffraction. Through the analysis of the test results, it can be shown that the Fe 2 O 3 –SnO 2 nanorod samples prepared in this experiment have the advantages of high purity, good crystallinity and large specific surface area. The specific surface area of the sample obtained from the test is 19.27 m 2 /g. According to the gas sensitivity test results of Fe 2 O 3 –SnO 2 nanorods, it can be seen that Fe 2 O 3 –SnO 2 samples have high responsiveness and excellent gas sensitivity selectivity . Various gases were tested in this experiment, and it was found that the sensor has good gas selectivity to isobutanol. At 310 °C, the sensor's response to 100 ppm isobutanol reached 13. This experiment not only prepared Fe 2 O 3 –SnO 2 nanorod sensor with good isobutanol gas sensitivity. And it realized the accurate measurement of continuous isobutanol concentration. In addition, the gas sensitivity mechanism of Fe 2 O 3 –SnO 2 nanomaterials was discussed.
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
RSC Advances
·
2022
·Vol. 12
·期 36
·23503-23512
·
IF 4.036
Kun Huang,Lan Yang,Yihong Gao,Shikuo Li,Hui Zhang,Fangzhi Huang
For electrocatalytic hydrogen evolution in acidic environments, the stability of catalysts has always been a significant factor restricting development. Here, we prepared a superstable SnO2/MoS2 coupled nanosheet array on carbon cloth (CC@SnO2/MoS2), exhibiting an overpotential of 166 mV at a current density of 10 mA cm−2. According to the results of various tests and theoretical calculations, it is shown that the establishment of SnO2/MoS2 interface engineering is to accelerate the electron transmission on the heterogeneous interface and S defects on the edge of MoS2, and finally improve the conductivity and catalytic activity of the catalyst. More importantly, the formation of an SnO2 interface layer during in situ transformation improves the stability and hydrophilicity of the material surface. We have proposed a strategy for engineering an interface with fast electron transport and proton adsorption, providing some new ideas for the design of HER catalysts in acid electrolytes.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
VACUUM
·
2024
·
IF 3.8
Xiaoqian Shi,ZhiChen Lu,Qi Wang,Peng Song
Developing low-cost, realistic low temperature operable ammonia sensor is highly desirable in industrial for environmental monitoring. This paper focuses on the preparation of Ag nanoparticles-loaded SnO 2 /In 2 O 3 ternary composites by combining both indium oxide and metal-organic frameworks (MOFs) compounds by hydrothermal method . They both remain as pure In 2 O 3 flakes and the size of each flake matrix is about 2 μm, which indicates that both Ag loading and SnO 2 composite have not damaged or changed the crystal structure of the In 2 O 3 -based composites. The best response gas for the Ag/SnO 2 /In 2 O 3 material was ammonia with a response value of 9.783 at the optimum operating temperature of 160 °C. The difference in each set of data after three cycles of testing was not more than 0.25. The tests showed that the sensor had good reproducibility and sensitivity, and had a low detection limit.
研究领域:
材料科学
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环境监测
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Boxuan Yang,Zheng Zhang,Chen Tian,Wenjing Yuan,Zhongqiu Hua,Shurui Fan,Yi Wu,Xuemin Tian
Gas sensors based on Pd-loaded SnO 2 were prepared with printed zeolite films on the top of the sensor layer to enhance selective response to methane. As expected, Pd-loaded SnO 2 has a sensitive response to CH 4 and VOCs, such as ethanol and acetone vapors. Pt catalyst was dispersed onto the surface to promote the catalytic activity of zeolite. According to the catalytic characterizations, it was indicated that interfered gases, CO and ethanol were catalytically oxidized into CO 2 and water vapor. Whereas the catalytic combustion of methane is a negligible and sensitive response to the interested analyte was significantly promoted. Thus, the selective response to CH 4 was greatly improved even in a mixture of CO and VOCs. Based on the power-law response to oxygen, it was found that the resistive responses of all sensors were highly oxygen-dependent, suggesting that oxygen adsorbates on the surface were involved in the sensing process and no difference with zeolite coated sensors. Thus, it can be concluded that zeolite films printed onto the sensing layer surface serve as a catalytic filter and responsible for the enhanced sensitive and selective response of methane.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2015
·
IF 3.088
Na Cao,Miao Li,Yanbao Zhao,Li Qiu,Xueyan Zou,Yu Zhang,Lei Sun
To create novel nanocarriers for achieving excellent drug delivery performance, pH-responsive fluorescent porous silica (PS) nanocarriers were developed by encapsulating SnO 2 nanoparticles and coating polyethyleneimine (PEI) layer. SnO 2 /porous silica (SnO 2 /PS) nanoparticles have an average diameter of 80 nm and center-radial large pore channels. The large channels endow them high surface area with a Brunauer–Emmett–Teller (BET) area of 939 m 2 g − 1 . Aspirin was used as test drug to evaluate the releasing behavior of SnO 2 /porous silica/polyethyleneimine (SnO 2 /PS/PEI) nanoparticles. Results indicated that aspirin can be successfully incorporated into the SnO 2 /PS/PEI nanoparticles and the SnO 2 /PS/PEI nanoparticles displayed excellent pH-responsive release. The release rate in pH 7.4 buffer is higher than that in pH 5.5 buffer, which attributed to the PEI structure change in varied pH buffer. In addition, the SnO 2 /PS/PEI nanoparticles presented novel drug-dependent fluorescence, which could be used to trace the drug release.
研究领域:
材料科学
·
药学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Coatings
·
2020
·Vol. 10
·期 4
·399
·
IF 2.436
Qiannan Ye,Xu Zhang,Dong Guo,Wei Xu,Honglong Ning,Tian Qiu,Jinxiong Li,Danqing Hou,Rihui Yao,Junbiao Peng
High-quality SnO2:Si films and SnO2:10 at.% Ga films were prepared by the solution method. The roughness of films is below 1.08 nm, and possess exceptional transparency (>75%) and decent semiconductor properties. Based on this, the SnO2:Si/SnO2: Ga homojunctions with different Si doping concentrations were prepared. It is found that the conductivity of the SnO2:Si thin film gradually increases, and the rectification characteristics of the homojunction are optimized with increasing Si doping content. The SnO2:15 at.% Si/SnO2:10 at.% Ga homogeneous junction has the best performance, the turn-on voltage is as low as 5.6 V, and it also exhibits good unidirectional conductivity. The photoresponse of the SnO2:15 at.% Si/SnO2:10 at.% Ga homojunction under the lights of red, yellow, and purple was explored respectively. The result shows that the device responds strongly to purple light. Compared with the test results in the dark environment, the device current increases by two orders, which is expected to be applied in the field of near-ultraviolet detection.Keywords:solution method;SnO2;homojunction;highly transparent;photoresponse
研究领域:
材料科学
·
光电学
·
半导体物理
✓ 已验证
DOI
高影响因子
Journal of Nanoelectronics and Optoelectronics
·
2023
·Vol. 18
·期 12
·1419-1426
·
IF 0.6
Li Nianci,Yu Li,Zhang Hao
In this study, a novel 2D SnO2/g-C3N4 nanosheet heterojunction was successfully synthesized utilizing a facile hydrothermal method coupled with a subsequent pyrolysis process. Comprehensive characterization employing X-ray diffraction (XRD), X-ray photoelectron
spectroscopy (XPS), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) confirmed the formation of nanocomposites featuring lamellar g-C3N4 nanosheets enveloping SnO2 nanoparticles. The SnO2/g-C3N4 heterojunctional
composite, with a g-C3N4 weight of 55.66%, exhibited a remarkable maximum gas-sensing response of 8.81 towards 20 ppm acetone at the optimized operating temperature of 280 °C. This response was approximately 3.1 times higher than that observed for pure SnO2
nanoparticles. The heightened sensing performance is attributed to the homogeneous dispersion of SnO2 nanoparticles on lamellar g-C3N4 nanosheets and the formation of an n-n heterojunction. The insights gained from this investigation offer valuable implications
for the design and fabrication of metal oxide-based heterojunctional nano/microstructures, providing enhanced capabilities for gas sensing applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Peng Wu,Yi Li,Song Xiao,Dachang Chen,Junyi Chen,Ju Tang,Xiaoxing Zhang
Ti3C2Tx MXene is an emerging two-dimensional transition-metal carbide/nitride with excellent properties of large specific surface and high carrier mobility for room-temperature gas sensing. However, achieving high sensitivity and long-term stability of pristine Ti3C2Tx-based gas sensors remains challenging. SnO2 is a typical semiconductor metal oxide with high reaction activity and stable chemical properties ideal for a dopant that can comprehensively improve sensing performance. Ti3C2Tx and SnO2 are investigated for the first time in this study as functional materials for hybridization and room-temperature detection of the gas insulating medium fluorinated nitrile (C4F7N) with microtoxicity. A Ti3C2Tx–SnO2 nanocomposite sensor exhibits superior sensitivity, high selectivity, strong anti-interference ability, and excellent long-term stability. The enhanced sensing mechanism is ascribed to the synergistic effect between SnO2 and Ti3C2Tx and the strong adsorption ability of SnO2 to C4F7N similar to bait for fish. We also established an actual leakage scene and demonstrated the feasibility of the Ti3C2Tx–SnO2 sensor to provide distribution rules with high sensing efficiency for actual engineering applications. The results of this work can expand the gas sensing application of Ti3C2Tx MXene and provide a reference for maintaining C4F7N-based eco-friendly gas-insulated equipment.
研究领域:
材料科学
·
气体传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 11
·8329-8338
·
IF 2.019
Xing Honglong,Shen Ziyao,Wang Lei,Zhu Yanting,Ji Xiaoli
α-Fe 2 O 3 /SnO 2 @polyaniline composites were prepared by combining a hydrothermal reaction and an emulsion polymerization process. The sizes of α-Fe 2 O 3 and SnO 2 particles dispersed into PANI were 80–120 and 8 nm, respectively. The structure, morphology, and electromagnetic (EM) parameters were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and vector network analysis. To achieve the absorption of different EM bands, the EM wave absorption properties of α-Fe 2 O 3 /SnO 2 @PANI composites with different stannic oxide content were investigated according to transmission line theory. Polarizations and multiple reflections in the composite absorber play a key role in EM wave absorption. The α-Fe 2 O 3 /SnO 2 @PANI composites exhibited high EM absorption capacity and an optimal reflection loss of −50.3 dB at 9.9 GHz with thickness of 2.7 mm. Moreover, the composite could reach an effective absorption bandwidth (below −10 dB) from 7.84 to 12.08 GHz. Thus, the synthesized composites are suitable candidates for highly efficient EM wave absorption in the entire X-band.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Wenwen Zeng,Yingzhi Liu,Jun Mei,Changyu Tang,Kun Luo,Shaomin Li,Haoran Zhan,Zhoukun He
Considering the high harmfulness of NO 2 to the environment and human healthy, it is pressing to develop NO 2 sensors with high sensitivity and selectivity. In this work, we successfully fabricated a novel hierarchical SnO 2 –Sn 3 O 4 n–n heterostructure through the solvothermal method and subsequent annealing. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM) characterization of the material confirmed the hierarchical microsphere structure and the formation of SnO 2 –Sn 3 O 4 n–n heterojunction. The gas sensing experiment demonstrated that the sample annealed at 600 °C exhibited excellent NO 2 sensing performances at 150 °C. Its sensitivities to 5 and 10 ppm NO 2 were as high as 48 and 43.6 ppm −1 respectively, and its limit of detection was lower than 20 ppb. Additionally, it possessed excellent selectivity to NO 2 as well as good repeatability and stability. With further exploration of the sensing mechanism of hierarchical SnO 2 –Sn 3 O 4 n–n heterostructure, we proposed that the unique microstructure with a large specific surface area and the formation of n–n-type heterojunctions contribute to the excellent NO 2 sensing performance.
研究领域:
材料科学
·
环境科学
✓ 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）