Issue 38, 2014

Electrospinning of mesoporous p-type In2O3/TiO2 composite nanofibers for enhancing NOx gas sensing properties at room temperature

Abstract

In this paper, a series of loose and porous p-type In2O3/TiO2 composite nanofibers (ITCN) has been synthesized via a facile synthesis using an electrospinning approach, followed by an appropriate thermal treatment under ambient conditions. It was found that the ITCN, with an In2O3 composite content of 14.3 at% (ITCN2), which had lots of loose pores (approximate size of 4–6 nm) in the nanofibers (NFs), made of nanoparticles (7–12 nm), exhibited a short response time of 3 s at 97 ppm and a low detection limit of 97 ppb to NOx, which was over 9 times higher than the response of pure TiO2 nanofibers at room temperature. The ITCN2 performance came from the composite In3+ as an ionic charge-compensating and highly electrically conductive agent, which resulted from adding a large number of gas sensing active sites and increased the conductivity. Hence, the p-type In2O3-composite TiO2 has potential for the development of novel gas sensors at room temperature.

Graphical abstract: Electrospinning of mesoporous p-type In2O3/TiO2 composite nanofibers for enhancing NOx gas sensing properties at room temperature

Supplementary files

Article information

Article type
Paper
Submitted
18 Jun 2014
Accepted
31 Jul 2014
First published
31 Jul 2014

CrystEngComm, 2014,16, 9116-9124

Electrospinning of mesoporous p-type In2O3/TiO2 composite nanofibers for enhancing NOx gas sensing properties at room temperature

H. Wu, K. Kan, L. Wang, G. Zhang, Y. Yang, H. Li, L. Jing, P. Shen, L. Li and K. Shi, CrystEngComm, 2014, 16, 9116 DOI: 10.1039/C4CE01248H

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