Issue 3, 2021

Mesoporous WO3 modified by Au nanoparticles for enhanced trimethylamine gas sensing properties

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 (Ra/Rg) 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.

Graphical abstract: Mesoporous WO3 modified by Au nanoparticles for enhanced trimethylamine gas sensing properties

Article information

Article type
Paper
Submitted
07 Sep 2020
Accepted
27 Nov 2020
First published
09 Dec 2020

Dalton Trans., 2021,50, 970-978

Mesoporous WO3 modified by Au nanoparticles for enhanced trimethylamine gas sensing properties

Y. Wang, S. Zhang, C. Huang, F. Qu, D. Yao, H. Guo, H. Xu, C. Jiang and M. Yang, Dalton Trans., 2021, 50, 970 DOI: 10.1039/D0DT03131C

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