Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (5): 855.doi: 10.7503/cjcu20190688

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Progress in Preparation and Gas-sensing Application of Hollow Multi-shell Structured Materials

SUN Hui,LAI Xiaoyong()   

  1. State Key Laboratory of High Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2019-12-18 Online:2020-05-10 Published:2020-02-17
  • Contact: Xiaoyong LAI E-mail:xylai@nxu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(51672138)

Abstract:

Advanced gas sensing technology plays a very important role in the safe production and life of modern society, where the keypoint is the design and development of efficient sensing materials. Hollow multi-shell structured materials possess special physical and chemical properties due to their unique structures with both multiple shells and multi spaces and thus great potential in application for gas sensing. The conventional hard template and soft template methods as well as template-free method based on Osterwald ripening or Kirkendall effect have some limitations in the general preparation of hollow multi-shell structured materials and the precise control of the shell structure. The emergence of the sequential template approach greatly broke through the above-mentioned limitations and promoted the rapid development of the field. This paper briefly reviews the development of the preparative method of hollow multi-shell structured materials, introduces their applications in detecting formaldehyde, ethanol, acetone, toluene, nitrogen dioxide and other harmful gases, and analyzes their unique advantages in gas sensing, and finally summarizes and prospects the challenges and prospects.

Key words: Hollow multi-shell structure, Metal oxide semiconductor, Sequential templating approach, Gas sensing

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