Systematic investigation on the gas-sensing performance of TiO 2 nanoplate sensors for enhanced detection on toxic gases

Abstract Protecting atmosphere environment from expose to toxic gases is one of important issues. TiO 2 nanoplates with the large percentage of highly reactive (0 0 1) facets for gas sensor applications were systematically investigated. Structural characterizations reveal that the as-synthesized TiO 2 nanostructure possesses a square-shaped plate-like structure with the edge length ranging from 30 to 50 nm. The gas-sensing characteristics of TiO 2 nanoplate sensor were investigated for a series of toxic gases, such as NO, NO 2 , H 2 , CH 4 , CO, H 2 S and SO 2 . Through optimizing the detection condition, we carefully discussed the gas-sensing performance of TiO 2 nanoplate sensor towards H 2 S and SO 2 and the corresponding gas-sensing mechanism. It is expected that TiO 2 nanoplate sensors are promising to be used for detecting H 2 S and SO 2 in future.