AUTHOR=Qiu Zhilei , Hua Zhongqiu , Li Yan , Wang Mengjun , Huang Dan , Tian Chen , Zhang Chensheng , Tian Xuemin , Li Erping 

TITLE=Acetone Sensing Properties and Mechanism of Rh-Loaded WO3 Nanosheets

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 6 - 2018

YEAR=2018

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00385

DOI=10.3389/fchem.2018.00385

ISSN=2296-2646

ABSTRACT=In this paper, WO3 nanosheets were prepared by an acidification method and Rh catalyst was loaded on
the surface of nanosheets through a wet impregnation process. The effects of Rh modification on
structures and morphologies of WO3 nanosheets were investigated. WO3 gas sensors fabricated from
the nanosheets were prepared and the sensing properties of acetone were investigated. Sensitization
mechanis m on the sensing performance were analyzed based on the oxygen adsorption and TPR results.
It was found that Rh-loading had no influence on the morphology of WO3 nanosheets, however, the
sensor resistance and sensor response were greatly promoted. The basic sensitizat ion mechanis m could
be caused by the electronic interaction between oxidized Rh and WO3 surface.