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Sensors 2017, 17(9), 1971; https://doi.org/10.3390/s17091971

TiO2-Based Nanoheterostructures for Promoting Gas Sensitivity Performance: Designs, Developments, and Prospects

1,2,†,* , 1,2,†
,
1,3
,
1
,
1
and
1,*
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, PO Box 919-111, Mianyang 621900, Sichuan, China
2
School of National Defense Science and Technology, Southwest University for Science and Technology, Mianyang 621900, Sichuan, China
3
School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 2 July 2017 / Revised: 19 August 2017 / Accepted: 25 August 2017 / Published: 27 August 2017
(This article belongs to the Collection Gas Sensors)

Abstract

Gas sensors based on titanium dioxide (TiO2) have attracted much public attention during the past decades due to their excellent potential for applications in environmental pollution remediation, transportation industries, personal safety, biology, and medicine. Numerous efforts have therefore been devoted to improving the sensing performance of TiO2. In those effects, the construct of nanoheterostructures is a promising tactic in gas sensing modification, which shows superior sensing performance to that of the single component-based sensors. In this review, we briefly summarize and highlight the development of TiO2-based heterostructure gas sensing materials with diverse models, including semiconductor/semiconductor nanoheterostructures, noble metal/semiconductor nanoheterostructures, carbon-group-materials/semiconductor nano- heterostructures, and organic/inorganic nanoheterostructures, which have been investigated for effective enhancement of gas sensing properties through the increase of sensitivity, selectivity, and stability, decrease of optimal work temperature and response/recovery time, and minimization of detectable levels. View Full-Text
Keywords: TiO2; nanoheterostructures; gas sensor TiO2; nanoheterostructures; gas sensor
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Wang, Y.; Wu, T.; Zhou, Y.; Meng, C.; Zhu, W.; Liu, L. TiO2-Based Nanoheterostructures for Promoting Gas Sensitivity Performance: Designs, Developments, and Prospects. Sensors 2017, 17, 1971.

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