微流体反应器制备金纳米粒子的研究  

Preparation of gold nanoparticles in a complete polymeric microfluidic reactor under UV irradiation

作　　者：商运生[1] 马育红[1] 杨万泰[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2010年第6期70-75,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：长江学者和创新团队发展计划(IRT0706)

摘　　要：利用全聚合物微流体反应器,在紫外光照射下制备了金纳米粒子。采用紫外-可见吸收光谱、激光粒度分析仪、高分辨透射电镜等对柠檬酸钠-氯金酸微流体光化学反应体系进行了表征,并考察了注射泵的流速、柠檬酸钠与氯金酸的浓度比、紫外辐射强度对金纳米粒子产率和粒径大小的影响。结果表明,得到的金纳米粒子最小粒径约20nm;金纳米粒子的产率随注射泵流速的增大而上升,但是随柠檬酸钠与氯金酸浓度比的增大和紫外辐射强度的增强而减弱;金纳米粒子的粒径随注射泵流速的增大和紫外辐射强度的增强而减小,但是在柠檬酸钠与氯金酸浓度比小于16时,粒径变化不大,当柠檬酸钠与氯金酸浓度比大于16时,粒径迅速增大。Gold nanoparticles have been synthesised in a complete polymeric microfluidic reactor under UV irradiation. The dispersions of gold nanoparticles were prepared by photoreaction of sodium citrate with chloroauric acid in aqueous solution and were characterised by UV-Vis absorption spectroscopy,laser particle size analysis and high-resolution transmission electron microscopy （HR-TEM）. The effects of various factors,including the flow rates of reactants,the concentration ratio csodium citrate/cchloroauric acid and UV light intensity,on UV-Vis absorption intensity and diameters of the gold nanoparticles were investigated. The smallest gold nanoparticles obtained had diameters of 20 nm. The yield of gold nanoparticles increased as the flow rates increased,but decreased as csodium citrate/cchloroauric acid increased and as the UV light intensity increased. The diameter of the gold nanoparticles decreased as flow rates increased and as UV light intensity increased. At low csodium citrate/cchloroauric acid （16）,the size of the nanoparticles was essentially independent of concentration ratio. However,at higher c sodium citrate /cchloroauric acid （16）,the diameters of the resulting gold nanoparticles increased with increasing concentration ratio csodium citrate/cchloroauric acid.

关 键 词：微流体反应器 光化学反应 金纳米粒子 产率 

分 类 号：O614.12[理学—无机化学]