摘要
以HAuCl_4·4H_2O为前驱体,抗坏血酸(VC)为还原剂,线性聚乙烯亚胺(L-PEI)为表面活性剂在水相中制备了单分散的近球形和片状金粉。采用SEM、XRD和激光粒度分析仪对金粉的形貌、粒径、结晶和分散性进行了测试和表征。研究了还原剂和金前驱体的摩尔比、L-PEI浓度、温度及反应溶液的pH对近球形和片状金粉的形貌和粒径大小的影响。给出了制备微米级近球形和片状金粉的反应条件,同时也提出了近球形和片状金粉的成核和晶核生长的可能解释。
Monodispersed near-sphere and flake gold powders were prepared by the direct reduction ofchloroauric acid tetrahydrate(HAuCl4·4H2O)in water.using ascorbic acid(VC)as the reducing agent andlineal polyethyleneimine(L-PEI)as the surfactant.SEM,XRD and laser particle sizer were used to test themorphology,size,crystal form and dispersity of obtained gold powders.The molar ratio of VC toHAuCl4·4H2O,concentration of L-PEI,temperature as well as pH value of the reaction solution wereinvestigated,and their effects on morphology and size of near-sphere and flake gold particles were discussed.The conditions for preparing near-sphere and flake gold powders in range of one to several micrometerswere optimized.Possible explanations for the nuclei formation and growth of near-sphere and flake goldparticles were also proposed.
作者
罗慧
李世鸿
曾一明
刘继松
李文琳
幸七四
梁云
姚志强
张骏
LUO Hui;LI ShiHong;ZENG Yiming;LIU Jisong;LI Wenlin;XING Qisi;LIANG Yun;YAO Zhiqiang;ZHANG Jun(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Kunming 650106, China)
出处
《贵金属》
CAS
CSCD
北大核心
2017年第1期15-21,共7页
Precious Metals
基金
The fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals(SKL-SPM-201532)
Development & Industrialization of Buried Conductive and Via-Fill gold pastes used on LTCC Substrate(2015IA035)
Key Technologies of Preparing LTCC Electronic Pastes and Their Industrial Applications(2015020211)
关键词
金属材料
近球形金粉
片状金粉
制备
表征
metal materials
near-sphere gold
flake gold
preparation
characterization
