Mesoporous WO3 modified by Au nanoparticles for enhanced trimethylamine gas sensing properties. Issue 3 (22nd December 2020)

• Record Type: Journal Article
• Authors: Wang, Yunan; Zhang, Shendan; Huang, Chaozhu; Qu, Fengdong; Yao, Dong; Guo, Haichuan; Xu, Haohao; Jiang, Chunjie; Yang, Minghui
• Is Part Of: Dalton transactions. Volume 50:Issue 3(2020)
• Page Start: 970
• Page End: 978
• Publication Date: 2020-12-22
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt03131c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Au-Doped mesoporous WO3 is prepared and it exhibited higher response to TMA gas. Abstract : In this paper, KIT-6 is used as a template to prepare ordered mesoporous materials WO3 and Au-loaded WO3 (Au–WO3 ). The pristine WO3 sensor and the Au–WO3 sensor are fabricated for the detection of 19 important gases, such as trimethylamine, formaldehyde and CS2 . The results show that the Au–WO3 sensor has better selectivity and higher response to TMA. At a working temperature of 268 °C, the response ( R a / R g ) of the Au–WO3 sensor to 100 ppm of TMA is 41.56 and the response time is 1 s. In addition, the sensor has excellent response/recovery capabilities and stability. These high sensing performances are mainly attributed to the electronic and chemical sensitization of the noble metal Au and the presence of a high specific surface area supported by the mesoporous structure. Therefore, Au-doped mesoporous WO3 should be a promising material for a high performance TMA gas sensor.