文献类型：期刊文献

英文题名：A Facile Strategy to Rapidly Screening Gas-Sensitive Materials in Large Samples: A Case Study of Surface Modified Sno2 for Ch4 Detection

作者：Zhu, Ye[1]; Yang, Li[1]; Hou, Ming[1]; Zhang, Shunping[2]; Zhang, Guozhu[3]; Guo, Shenghui[1]

机构：[1] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; [2] School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 530074, China; [3] School of Mechanical and Power Engineering, Shanghai Key Laboratory of Intelligent Sensing and Detection Technology, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230205807)

语种：英文

外文关键词：Coal mines - Field emission microscopes - Gas detectors - Gases - Metal ions - Metal nanoparticles - Methane - Morphology - Rare earths - Schottky barrier diodes - Synthesis (chemical)

摘要：It is crucial that the Methane (CH4) explosion is a gas accident that severely restricts the safety of coal mines, so the detection of methane. This paper reviews the design and development of metal oxide nanomaterials, followed by accenting an outlook in conjunction with the idea of parallel synthesis. To begin with, 18 different concentrations of rare earth and precious metal elements were modified on the surface of SnO2 nanoparticles, respectively, by a parallel synthesis platform. Then, the microscopic morphology and surface composition of the samples were characterized by the X-ray diffraction technique and field emission scanning electron microscopy. Finally, The gas-sensitive properties of the obtained 91 gas-sensitive materials were studied simultaneously for CH4 gas using an unmanned high-throughput gas-sensitive test platform assembled in-house. The results showed that the 0.2 mol% Ytterbium-modified SnO2 sensor showed an ultra-high response (Rair/ Rgas= 33.7) to 1000 ppm CH4 at 400 °C, which was 25.9 times higher than that of the pure SnO2 sensor. In addition, the sensor exhibited stable repeatability. The performance enhancement of the SnO2-based CH4 gas sensor with surface-modified metal elements is mainly due to the spillover effect of the metal elements and the promotion of the Schottky barrier, both of which synergistically enhance the gas-sensitive performance of the material. ? 2023, The Authors. All rights reserved.