WO3 nanorods / Ti3C2Tx nanocomposites sensor for detecting SO2 at room temperature.

The detection of decomposed components is one of the important means of condition monitoring of SF 6 gas insulation equipment, among which chemical sensing is a kind of method with great potential. In this paper, two-dimensional Ti 3 C 2 T x was used as the sensing material substrate, and WO 3 -Ti 3 C 2 T x with different WO 3 doping concentrations were prepared by a one-step hydrothermal method. These materials were used to detect SO 2 , one of the decomposition products of SF 6. The results show that WO 3 -Ti 3 C 2 T x has a response of 12.5 % to 50 ppm SO 2 at room temperature(20℃), and the response time and recovery time are 54 s and 47 s, respectively. At the same time, WO 3 -Ti 3 C 2 T x has an excellent selectivity and long-term stability. Therefore, it is believed that WO 3 -Ti 3 C 2 T x can be used as an excellent material for SO 2 gas sensing devices. • Three-dimensional porous WO 3 /Ti3C2Tx synthesized by one-step hydrothermal method. • The sensor exhibits high sensitivity, rapid response and recovery to low-concentration SO2 in room temperature(20℃). • Good linear response for a wide range of SO 2 gas concentrations. [ABSTRACT FROM AUTHOR]