Issue 57, 2017, Issue in Progress

General fabrication and enhanced VOC gas-sensing properties of hierarchically porous metal oxides

Abstract

A facile and general route to synthesize hierarchically porous metal oxide nanostructures was reported here. The results indicate that the hierarchically porous metal oxides show high sensitivity to toxic or dangerous gases. The signal sensitivity of the gas sensors exhibits a good linear relation with the VOC gas concentration. As one of the as-synthesized hierarchically porous metal oxides, ZnO exhibits the lowest detection limit of 15 ppb for formaldehyde, which is much lower than the limit value of indoor formaldehyde (60 ppb). Furthermore, the sensitivity of the ZnO porous nanosheets decorated with Au nanoparticles is 10 ppb for formaldehyde, which is about 1.5 times higher than that of the unmodified ZnO porous nanosheets.

Graphical abstract: General fabrication and enhanced VOC gas-sensing properties of hierarchically porous metal oxides

Supplementary files

Article information

Article type
Paper
Submitted
19 Jun 2017
Accepted
09 Jul 2017
First published
19 Jul 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 35897-35904

General fabrication and enhanced VOC gas-sensing properties of hierarchically porous metal oxides

Y. Gao, Q. Kong, J. Zhang and G. Xi, RSC Adv., 2017, 7, 35897 DOI: 10.1039/C7RA06808E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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