Citation: Wang Weichao, Liu Fengqi, Wang Bing, Wang Yingde. Effect of defects in TiO₂ nanoplates with exposed {001} facets on the gas sensing properties[J]. Chinese Chemical Letters, ;2019, 30(6): 1261-1265. doi: 10.1016/j.cclet.2018.12.030 shu

Effect of defects in TiO₂ nanoplates with exposed {001} facets on the gas sensing properties

Wang Weichao ^a,b,1 ,
Liu Fengqi ^a,1 ,
Wang Bing ^a,*, ,
Wang Yingde ^a,*,

a.
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
b.
Northwest Institute of Nuclear Technology, Xi'an 710024, China

E-mail addresses:

bingwang@nudt.edu.cn

wangyingde@nudt.edu.cn

Received Date: 3 November 2018
Revised Date: 24 December 2018
Accepted Date: 28 December 2018
Available Online: 28 June 2018

Figures(5)

The exposed crystal facet of TiO₂ is a crucial factor influencing the gas sensing properties. TiO₂ with highenergy {001} crystal facets that have higher surface energy and reactivity is expected to exhibit excellent gas-sensing properties. In this paper, TiO₂ nanoplates with defective {001} facets were synthesized by chemical etching via one-step hydrothermal method. We carefully explored the gas-sensing performance of TiO₂ nanoplates with defective and complete {001} facets towards acetone. The results show that the sensing response of TiO₂ nanoplates with complete {001} facets is 70% higher than that of defective TiO₂ nanoplates, which proves that the {001} facets plays a vital role in improving the gas sensing performance of TiO₂. It is speculated that the poor gas sensitivity of defective TiO₂ can be contributed to fewer adsorption sites and blocked electron transfer. This work presents a more direct evidence for explaining the important role of the complete {001} crystal facets in high sensitivity of TiO₂ and also provides a new insight for preparing high sensitivity sensing materials.
- Gas sensing,
- TiO₂ nanoplates,
- {001} facets,
- Defective,
- Actone
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effect of defects in TiO2 nanoplates with exposed {001} facets on the gas sensing properties

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通讯作者: 陈斌, bchen63@163.com

Effect of defects in TiO₂ nanoplates with exposed {001} facets on the gas sensing properties