Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (11): 1572-1580.DOI: 10.19894/j.issn.1000-0518.230198

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Au Nanoparticles Confined in N-Doped Porous Carbon for Detection of Chlorine Dioxide in Liquid Phase

Ding ZHANG, Wei-Wei YANG, Song-Song MIAO, Yi SU()   

  1. CAS Key Laboratory of High-performance Synthetic Rubber and Its Composite Materials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2023-07-23 Accepted:2023-09-23 Published:2023-11-01 Online:2023-12-01
  • Contact: Yi SU
  • About author:suyi@ciac.ac.cn
  • Supported by:
    High Tech Industrialization Special Fund Project of Science and Technology Cooperation Between Jilin Province and Chinese Academy of Sciences(2023SYHZ0025)

Abstract:

At present, chlorine dioxide (ClO2) has become one of the most popular green disinfectants. Although ClO2 disinfectant has been widely used in various domains, there are few survey reports on the detection of ClO2 concentration. Therefore, it becomes an urgent demand to develop new catalyst materials for detection of ClO2 in liquid phase. Using polypyrrole as the nitrogen source, the N-doped porous carbon (NPC) is obtained by mixing and annealing with KOH as the substrate. After the loading of gold nanoparticles, the surface active agent is removed by high-temperature pyrolysis, and the Au nanoparticles embedded in N-doped porous carbon catalyst (NPC-Au-P) are obtained. Compared with the N-doped carbon supported Au nanoparticles prepared by traditional methods, the porous structure of NPC-Au-P can limit the domain of Au nanoparticles, which can maintain a smaller size after high temperature pyrolysis, so it has higher catalytic activity. For electrochemical detection of ClO2 in the liquid phase, NPC-Au-P has a high sensitivity of 29.77 L·mA/mol and a low detection limit of 0.12 μmol/L.

Key words: N-doped porous carbon, Au nanoparticles, Limit the domain, Electrochemistry, Chlorine dioxide

CLC Number: