Year: 2025
Type: article
Abstract: Due to its widespread distribution in industrial, commercial, and residential settings, xylene detection is crucial. In this study, carbon sphere templates and NaHCO3 etching were used to synergistically prepare WO3 with uniform macropores, which was then decorated with Au elements. The findings demonstrated that the Au-decorated WO3-etched sample (WO3-1%E+Au) had the best sensing performance for 100 ppm xylene (response value: 21.3, optimal operating temperature: 360 °C) and short response/recovery time (1 s/11 s). The etching of NaHCO3 and the synergistic carbon sphere templates were responsible for the sensing performance, as they enhanced the sample surface’s specific surface area and roughness while also supplying additional active sites. Furthermore, the sensor’s sensitivity and selectivity to xylene were enhanced by the coupling effect and dehydrogenation catalysis of the noble metal Au. The results of this work advance our knowledge of gas-sensing mechanisms and offer guidance for the creation of extremely sensitive and selective xylene gas sensors.
Source: Micromachines
DOI: 10.3390/mi16060646
Authors: Yinglin Wang, Zhaohui Lei, Xu Li, Yantong Meng, Wanting Cui, Yiyang Xu, Xidong Hao, Shanfu Sun, Pengfei Cheng
Institution: Xidian University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,534
Awards: G1294149089, G1307787035, G1568256499, G2022555137, G221100669, G2308051904, G2397722991, G2401369909, G2566916993, G2703775324, G3442560440, G3688463561, G4007892145, G5131932276, G5155759536, G5167099991, G5229222107, G5585486220, G6349478825, G6452967674, G680424032, G7680683771, G8017514458, G8205411848, G8294082636, G8398041585
OpenAlex ID: W4410814182