基于电喷雾化学还原法合成单分散纳米金溶胶  

Synthesis of Monodisperse Gold Nanoparticles Colloid Based on Chemical Reduction Electrospray

作　　者：展宗瑞[1] 张琪[1] 杨西萍[1] ZHAN Zong-mi;ZHANG Qi;YANG Xi-ping(School of Applied Chemical Engineering,Lanzhou Petrochemical Polytechnic,Lanzhou 730060,China)

机构地区：[1]兰州石化职业技术学院应用化学工程学院

出　　处：《兰州石化职业技术学院学报》2019年第3期1-5,共5页Journal of Lanzhou Petrochemical Polytechnic

基　　金：甘肃省青年科技基金计划项目(18JR3RA003);兰州石化职业技术学院科研基金项目(KJ2018-10)

摘　　要：借助电喷雾辅助化学还原法,直接在室温下,将氯酸金前体溶液的分散气溶胶喷射到含有还原剂(ODAM)和环己烷非极性溶剂(POCH)的反应溶液中来合成单分散小尺寸纳米金粒子。将电喷雾喷射分散进料与传统毛细管连续进料方法进行比较,通过紫外-可见光谱(UV-vis)和扫描透射电子显微镜(STEM)等对合成的纳米金进行表征,结果表明在非极性溶剂中通过化学还原法合成的纳米金粒子大小取决于试剂掺入的方法。前体的连续掺入产生多分散胶体,NPs尺寸约为4.4±0.6nm,和10.3±1.4nm,而电喷雾法掺入反应液中的微小液滴产生高度单分散的胶体,其NPs尺寸约为5.2±0.5nm。结果证明电喷雾辅助化学还原法是一种快速通用合成单分散金纳米粒子(AuNPs)的新方法。By electrospray-assisted chemical reduction method,directly in non-polar solvent at room temperature,the electrospray technique was used to spray a dispersed aerosol of gold precursor into the reaction bath containing reducing agent and non-polar solvent.Two methods of reagent incorporation into the reaction bath were compared;incorporation by continuous stream ow using a capillary,and by continuous droplet ow using electrospray technique.The obtained AuNPs were characterized by UV-vis spectroscopy,and scanning transmission electron microscopy(STEM).Results showed that the size of NPs synthesized via chemical reduction method in non-polar solvent depends on the method of reagents incorporation.The continuous incorporation of precursor resulted in polydisperse colloid with NPs size of about;4.4±0.6 nm and 10.3±1.4 nm,whereas incorporation of ne droplets to the reaction bath resulted in a highly monodisperse colloid with the NPs size of about 5.2.±0.5 nm.Results confirmed this is a fast and versatile method of monodisperse gold nanoparticles(AuNPs)synthesis.

关 键 词：单分散纳米金 溶胶 电喷雾 化学还原 

分 类 号：O648.4[理学—物理化学]