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

机构：[1]Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China;[2]Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 530074, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect Tec, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：24

期号：9

起止页码：15004

外文期刊名：IEEE SENSORS JOURNAL

收录：;EI(收录号：20241215767084);WOS:【SCI-EXPANDED(收录号:WOS:001219652600128)】；

基金：This work was supported in part by the National Natural Science Foundation of China (NSAF) under Grant U2030207, in part by the Science Research Foundation of Yunnan Provincial Education Department under Grant 2022J0441, and in part by the Yunnan Fundamental Research Projects under Grant 202201BE070001-018. The associate editor coordinating the review of this article and approving it for publication was Prof. Mehdi Javanmard. (Corresponding authors: Li Yang; Shenghui Guo.)

语种：英文

外文关键词：Sensors; Temperature sensors; Surface morphology; Gas detectors; Testing; Metals; Surface resistance; Composite materials science; high throughput screening; methane detection; parallel synthesis; surface modification

摘要：It is crucial that a methane (CH4) explosion is a gas accident that severely restricts the safety of coal mines, and so the detection of methane. This article 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 material composition and surface morphology of the samples were analyzed by the X-ray diffraction (XRD) technique and field emission scanning electron microscopy (FE-SEM). 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 test results show that the 0.2 mol% Yttrium-modified SnO2 sensor has an ultra-high gas-sensitive response (Rair/Rgas = 33.7) to 1000 ppm CH4 gas at 400 degrees C, which is 25.9 times that of 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.