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A novel composite of α-MoO3/BiVO4 for triethylamine selective detection

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Abstract

One-dimensional α-MoO3 nanorods were synthesized by a hydrothermal method and BiVO4 nanoparticles were grown directly onto the α-MoO3 nanorods using a simple metal organic decomposition process in order to construct an α-MoO3/BiVO4 composite with a heterojunction, for the fabrication of a rapid response triethylamine (TEA) sensor. The morphology and structure of the composite were characterized via various spectral techniques and the sensing properties of the sensor for TEA were investigated via resistance measurements. The results showed that the response of the 16Mo/Bi composite to 20 ppm TEA was 1.86 times and 15 times higher than those of α-MoO3 and BiVO4, respectively, at an optimum operating temperature of 125 °C. The enhancement can be ascribed to the existence of a heterojunction between α-MoO3 and BiVO4, creating an additional barrier at the interface of the heterojunction, and this increases the resistance of the composite in air and decreases the resistance in TEA, thus enhancing the response of the composite to TEA.

Graphical abstract: A novel composite of α-MoO3/BiVO4 for triethylamine selective detection

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Article information


Submitted
14 Dec 2019
Accepted
09 Jan 2020
First published
09 Jan 2020

New J. Chem., 2020, Advance Article
Article type
Paper

A novel composite of α-MoO3/BiVO4 for triethylamine selective detection

S. Bai, J. Han, X. Fan, J. Guo, R. Luo, D. Li and A. Chen, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ06198C

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