Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (2): 195-201.DOI: 10.19894/j.issn.1000-0518.200174

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Preparation of Thiourea Coordinated Chromium Black T Stabilized Silver Nanoclusters under Alkaline Environment

GUO Yong-Yan1,2, TIAN Yan-Fei1, DANG Ming-Ming1, YANG Ping1, LONG Yun-Fei2*   

  1. 1Public Education Department, Hu'nan Nonferrous Metals Vocational and Technical College, Zhuzhou 412006, China
    2School of Chemistry and Chemical Engineering, Hu'nan University of Science and Technology, Xiangtan 411201, China
  • Received:2020-06-08 Accepted:2020-09-30 Published:2021-02-01 Online:2021-04-10
  • Supported by:
    National Natural Science Foundation of China(No.21275047) and the Natural Science Foundation of Hu'nan Province(No.2016JJ5005)

Abstract: Silver nanoclusters have a wide range of application prospects because they have special physical and chemical properties. Since they are prone to agglomeration, it is of great significance to explore the method of preparing silver nanoclusters with strong fluorescence, high stablility and small particle sizes. A method for the rapid preparation of silver nanoclusters in alkaline environment with chromium black T as stabilizer and thiourea as coordination stabilizer was developed in this paper. Under the optimal conditions, the average particle size of the prepared silver nanoclusters is 1.67 nm, the particle size is mainly in the range of 0.74~3.33 nm, the lattice spacing is 0.2157 nm, and the lattice type is (102). The maximum excitation wavelength is 380 nm, the maximum emission wavelength is 463 nm, and the quantum yield is 1.64%.

Key words: Silver nanoclusters, Alkaline environment, Thiourea, Chromium black T

CLC Number: