Journal of Shanghai University(Natural Science Edition) ›› 2022, Vol. 28 ›› Issue (1): 102-110.doi: 10.12066/j.issn.1007-2861.2262

• Research Articles • Previous Articles     Next Articles

Synthesis of functionalised CMK-3 ordered mesoporous carbon materials and their humidity sensitivity performance

ZHANG Zhiwei1, FAN Yu2, MA Zhiheng2, LI Runlong2, HAO Chenran2, XU Jiaqiang2()   

  1. 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
    2. College of Sciences, Shanghai University, Shanghai 200444, China
  • Received:2019-11-02 Online:2022-02-28 Published:2020-10-19
  • Contact: XU Jiaqiang E-mail:xujiaqiang@shu.edu.cn

Abstract:

Mesoporous materials are widely used in several fields, such as energy storage, catalysis, and humidity sensors. In this study, ordered mesoporous silicon SBA-15 is used as a template to prepare CMK-3 mesoporous carbon materials with specific surface areas greater than 1 000 m2/g using a nanocasting method. The carbon materials are then modified by carboxyl functionalisation using ammonium persulfate. Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), small-angle X-ray diffraction (XRD), and Brunauer-Emmet-Teller (BET) nitrogen adsorption and desorption methods are used to characterise the materials. Results show that both before and after functionalisation, CMK-3 mesoporous carbon materials have favourable ordered mesoporous structures. Using a quartz crystal microbalance (QCM) test platform, the humidity sensing performances of the materials are tested. Results show that after carboxyl functional modification, the materials exhibit a high response to different humidity environments, and their humidity response is clearly enhanced. Particularly in a 97% RH high-humidity environment, a remarkable response of as high as 1 600 Hz is obtained, which proves beneficial to the application of CMK-3 humidity sensitive materials in high-humidity environments.

Key words: ordered mesoporous carbon, carboxyl functionalisation, quartz crystal microbalance (QCM), humidity sensor, CMK-3

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