Abstract
SnO 2 has been extensively used in the detection of various gases. As a gas sensing material, SnO 2 has excellent physical-chemical properties, high reliability, and short adsorption-desorption time. The application of the traditional SnO 2 gas sensor is limited due to its higher work-temperature, low gas response, and poor selectivity. Nanomaterials can significantly impact gas-sensitive properties due to the quantum size, surface, and small size effects of nanomaterials. By applying nanotechnology to the preparation of SnO 2 , the SnO 2 nanomaterial-based sensors could show better performance, which greatly expands the application of SnO 2 gas sensors. In this review, the preparation method of the SnO 2 nanostructure, the types of gas detected, and the improvements of SnO 2 gas-sensing performances via elemental modification are introduced as well as the future development of SnO 2 is discussed.
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