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Progress in Chemistry 2021, Vol. 33 Issue (12): 2348-2361 DOI: 10.7536/PC201052 Previous Articles   Next Articles

• Review •

Nanostructure Construction and Sensing Mechanism of Metal Oxides for Room Temperature Gas Sensing

Shicheng Jin, Shuang Yan()   

  1. College of Textile and Materials Engineering, Dalian Polytechnic University,Dalian 116034, China
  • Received: Revised: Online: Published:
  • Contact: Shuang Yan
  • Supported by:
    the Natural Science Foundation of Liaoning Province(2019-ZD-0129)
Richhtml ( 152 ) Cited

A gas sensor working at room temperature shows great potential in practical applications due to its lower energy consumption, good stability, high security and ease of miniaturization. World-wide efforts have been devoted to explore materials with excellent room-temperature gas sensing performance. Metal oxide semiconductor materials are widely sourced, environmentally friendly and flexible in structure control. Research of metal oxide semiconductor based sensors operated at room temperature has made significant progress recently. In this paper, the development process and working principle of metal oxide gas sensors are introduced, various metal oxide nanostructures in regard to their room-temperature gas sensing properties are comprehensively reviewed. Particular emphasis is given to those effective strategies for constructing room-temperature sensors and their sensing mechanism. Finally, some future research perspectives in the field of room-temperature sensors are discussed as well.

Contents

1 Introduction

2 Development process of MOS gas sensors

3 Working principle of MOS gas sensors

4 Construction of nanostructured MOS gas sensors with room-temperature sensing performance

4.1 Pure metal oxide nanostructures

4.2 Metal oxide hetero- or composite-nanostructures

4.3 UV assisted gas sensing material

5 Conclusion and outlook

Key words: metal oxide semiconductor, gas sensing material, room temperature sensing
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[1] Shicheng Jin, Shuang Yan. Nanostructure Construction and Sensing Mechanism of Metal Oxides for Room Temperature Gas Sensing [J]. Progress in Chemistry, 2021, 33(12): 2348-2361.
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