Issue 23, 2017

Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite

Abstract

In this paper, we report on a facile hydrothermal approach combined with a subsequent annealing process for the controllable synthesis of a single-crystalline WO3–rGO porous nanocomposite. The crystal structure, morphology and chemical composition of the as-obtained product were well-characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Brunauer–Emmett–Teller analysis. The results indicate that this hybrid structure is composed of single-crystal WO3 porous nanoflakes with a size of 500 × 500 nm2 growing through or anchoring into a sheet-like rGO matrix. We explore the sensing performance of the gas sensor based on the as-synthesized product. Impressively, gas testing shows that the WO3–rGO nanocomposite exhibits an excellent kinetic response speed and good sensitivity toward NO2 and some volatile organic compound pollutants at a low temperature (90 °C). The pseudo 3-D structure provides many channels for gas diffusion and clearly enhances sensing properties. As such, this graphene-based composite shows promising potential as a high-performance gas sensing material for real-time gas detection.

Graphical abstract: Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
19 Dec 2016
Accepted
24 Feb 2017
First published
02 Mar 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 14192-14199

Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite

Q. Hao, T. Liu, J. Liu, Q. Liu, X. Jing, H. Zhang, G. Huang and J. Wang, RSC Adv., 2017, 7, 14192 DOI: 10.1039/C6RA28379A

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