A Facile Preparation of Silver Nanocolloids by Hydrogen Reduction of a Silver Alkylcarbamate Complex

Bulletin of the Korean chemical society

Chan Kyo Park¹  Myoung Seon Gong¹  Hyun Ki Hong¹ 

关键词: Silver nanocolloid;    Silver alkylcarbamate;    Reduction;    Hydrogen;    Organic solvent;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Controlled reduction of silver alkylcarbamate complexes with hydrogen gas was investigated as a facile synthetic method for high concentrations of silver nanocolloids in organic solvent. Polyvinylpyrrolidone (PVP) was used to stabilize the silver colloids obtained from the chemical reduction. To determine optimum conditions for preparation of the stable and controlled silver colloids with the narrowest particle size and distribution, a large number of experiments were carried out involving variations in the concentrations of the silver 2-ethylhexylcarbamate (Ag-EHCB) complex, PVP, and 2-propanol. The initial colloid had a mean particle diameter between 5�?50 nm, as measured by transmission electron microscopy, and exhibited a sharp absorption band in the UV region with a maximum size near 420 nm. After treatment with a reducing agent, the colloids were characterized by ultraviolet-visible spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy.

【 授权许可】

Unknown