碱性环境下硫脲协调铬黑T稳定的银纳米簇的制备

银纳米簇因有特殊的物理和化学性质,具有广泛的应用前景和研究价值。由于其易发生团聚,探索制备具有强荧光特性、稳定存在、粒径小的银纳米簇的方法具有重要的意义。本文发展了以铬黑T为稳定剂、硫脲为协调稳定剂,在碱性环境中快速制备银纳米簇的方法。在最优条件下,制备的银纳米簇的平均粒径为1.67 nm,粒径主要分布在0.74~3.33 nm,晶格间距为0.2157 nm,晶格类型为(102)型;具有蓝绿色荧光,其最大激发波长为380 nm,最大发射波长为463 nm,量子产率为1.64%。

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

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%.