Study on room temperature gas-sensing performance of CuO film-decorated ordered porous ZnO composite by In2O3 sensitization.

ABSTRACT: For the first time, ordered mesoporous ZnO nanoparticles have been synthesized by a template method. The electroplating after chemical plating method was creatively used to form copper film on the surface of the prepared ZnO, and then a CuO film-decorated ordered porous ZnO composite (CuO/ZnO) was obtained by a high-temperature oxidation method. In2O3 was loaded into the prepared CuO film-ZnO by an ultrasonic-assisted method to sensitize the room temperature gas-sensing performance of the prepared CuO/ZnO materials. The doped In2O3 could effectively improve the gas-sensing properties of the prepared materials to nitrogen oxides (NO x ) at room temperature. The 1% In2O3 doped CuO/ZnO sample (1?wt% In2O3-CuO/ZnO) showed the best gas-sensing properties whose response to 100?ppm NO x reached 82%, and the detectable minimum concentration reached 1?ppm at room temperature. The prepared materials had a good selectivity, better response, very low detection limit, and high sensitivity to NO x gas at room temperature, which would have a great development space in the gas sensor field and a great research value.

SUBMITTER: Li TT 

PROVIDER: S-EPMC5830776 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature