期刊
CERAMICS INTERNATIONAL
卷 49, 期 3, 页码 4650-4658出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.09.352
关键词
SnO2; ZnO; Hollow cubes; n-n heterojunction; VOCs; Gas sensor
A novel composite of hollow SnO2/ZnO cubes was prepared using a self-template hydrothermal method and a calcination process. The morphology and structure of the composites were characterized, and the formation mechanism of the hollow cube-like structure was explored. The hollow SnO2/ZnO cube sensor exhibited a strong response, fast response/recovery time, good linearity, repeatability, and stability, attributed to the combined advantages of hollow structures and heterojunctions.
Detecting volatile organic compounds is essential to improving the environment and human health. This study prepared a novel composite of hollow SnO2/ZnO cubes using a self-template hydrothermal method followed by a calcination process. The morphology and structure of the composites were characterized using a series of analysis techniques, and the formation mechanism of a hollow cube-like structure was explored. Compared to the hollow SnO2 cube sensor, the hollow SnO2/ZnO cube sensor exhibited a strong response (148-100 ppm formaldehyde), fast response/recovery time (15 s/25 s), good linearity (R2 = 0.995), good repeatability, and excellent stability. The superior gas sensing property of the hollow SnO2/ZnO cubes was attributed to the combined advantages of hollow structures and heterojunctions.
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