High Sensitivity and Selectivity of C-Doped ${\rm WO}_{3}$ Gas Sensors Toward Toluene and Xylene

Abstract

High sensitivity and selectivity of C-doped WO 3 gas sensors are reported in this paper. C-doped WO 3 is synthesized by a facile infiltration and calcination process using the cotton fibers as templates. The response of C-doped WO 3 sensor toward toluene (50 ppm) and xylene (50 ppm) reach 91 and 199, respectively. By comparing the response of C-doped WO 3 sensor toward various indoor noxious gases (toluene, formaldehyde, ethanol, methane, benzene, and xylene), distinctive selectivity toward toluene and xylene is found. In addition, C-doped WO 3 exhibits relative hygro-stability, differing from traditional gas sensor material. The results indicate that C-doped WO 3 has good potential in practical applications, due to its remarkable performance and facile synthesized methods.

A highly stable and sensitive ethanol sensor based on Ru-decorated 1D WO3 nanowires

“…Tungsten trioxide (WO 3 ), with a morphology that is easily controlled through various synthesis methods, is an n-type MOS material 28 and displays good gas sensitivity in the detection of NO 2 , 29 xylene, 30 methanol, 31 and acetone. 32 Based on the typical gas sensing mechanism of MOS materials, 33 various methods for optimizing the sensing performance of WO 3 -based sensors have been studied.…”

Selective detection of low concentration toluene gas using Pt-decorated carbon nanotubes sensors

“…C 7 H 8 is an important aromatic organic compound in the chemical processing industries. Sensing of C 7 H 8 gas has been performed with a variety of materials, including diamond [13], (Sr,Ni)Al 2 O 4 [14], carbon black/amino-functional copolymer composites [15], and WO 3 [16]. To enhance the sensing capabilities with respect to the C 7 H 8 gas, various nanostructures, such as TiO 2 nanopores [17], SnO 2 nanoparticles [18], NiO-SnO 2 composite nanofibers [19], and ␣-Fe 2 O 3 nanoshuttles [20], have been investigated.…”

Synthesis of plasmonic Ag@SnO2 core–shell nanoreactors for xylene detection

“…2 Recently, serious attention has been paid to xylene detection by researchers using different metal oxide materials as shown in Table 1. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] However, most of the metal oxide gas sensors have drawbacks associated with their high working temperatures and poor selectivity. 18,19 Therefore, enormous efforts have been devoted to fabricating hetero-structured nanomaterials for the development of selective gas sensors working at low temperature.…”

“…Gas responses of different sensing materials to xylene, as reported in the literature and the present study[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] …”