Preparation and H2S Gas-Sensing Performances of Coral-Like SnO2-CuO Nanocomposite

• Published in: Acta metallurgica sinica : English letters 2015-09, Vol.28 (9), p.1190-1197
• Main Authors: Gao, Chun, Lin, Zhi-Dong, Li, Na, Fu, Ping, Wang, Xue-Hua
• Format: Article
• Language: English
• Subjects: Adsorption; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; CuO; Electron microscopy; Ethanol; Formaldehyde; Gases; Grain size; H2S气体; Hydrogen; Hydrogen sulfide; Materials Science; Metal oxides; Metallic Materials; Nanocomposites; Nanotechnology; Nitrogen; Organometallic Chemistry; Polyethylene glycol; Pore size; Sensors; SnO2; Software packages; Spectroscopy/Spectrometry; Tin dioxide; Tribology; 传感性能; 制备; 扫描电子显微镜; 珊瑚; 纳米复合材料
• ISSN: 1006-7191; 2194-1289
• DOI: 10.1007/s40195-015-0312-y

Nanocomposites composed of SnO2 and CuO were prepared by hydrothermal method. The microstructures of obtained SnO2-CuO powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption test. The results show that the nanocomposites exhibited coral-like nanostructure, and the average crystalline size of SnO2 was 12 nm. The specific surface area of the four samples, SnO2- 0.2CuO, SnO2-0.5CuO, SnO2-1.0CuO and SnO2-2.0CuO are 72.97, 58.77, 49.72 and 54.95 m2/g, respectively. The gas sensing performance of the four samples to ethanol, formaldehyde and H2S was studied. The sensor of SnOa-0.5CuO exhibited high response to hydrogen sulfide （4173 to 10 ppm H2S, where ppm represent 10-6）, and low response to ethanol and formaldehyde. The good selectivity exhibited that the SnO2-0.5CuO nanocomposite can be a promising candidate for highly sensitive and selective gas-sensing material to H2S.