反应条件对银胶体粒径及分布的影响.pdfVIP

Vol. 33 No. 6 ( ) 74 1 200712 Journal of East China University of Science an Technology ( Natural Science E ition) : 2007) 张昕宁, 钱 刚, 周方超, 周兴贵 ( 华东理工大学化学工程联合国家重点实验室, 上海200237) : 重点考察 利用液相化学还原法制备银胶体时温度浓度和加料方式对粒径分布的影 响以PVP( 聚乙烯吡咯烷酮) 和六偏磷酸钠为稳定剂, 以次亚磷酸钠为还原剂液相还原硝酸银, 制备出有不同粒径和分布的银胶体利用激光衍射粒度分析仪UVvis 分光光度计和透射电镜 (TEM) 确定胶体的粒径分布和形态研究结果表明: 一次性加料获得的粒径和分布较小, 硝酸银 浓度和温度影响聚并和生长, 从而对粒径分布产生复杂影响 : 银胶体; 生长; 聚并; 粒径分布 : O648 : A Influence of Reaction Conditions on the Size and Distribution of Colloidal Silver Nanoparticles ZH AN G Xinning, QIA N Gang, ZH OUFangchao, ZH OUXinggui (State K ey Laboratory of Che ical Engineering, East China University of Science and Technology , Shanghai 200237, China) Abstract: Influence of reaction con itions on the size an istribution of colloi al silver particles w as investigate . With PV P an so ium hexametapnosphate as stabilizing agents, silver colloi s of ifferent average sizes an size istributions w ere prepare by w et chemical re uction of AgNO3 with NaH2 PO4 , by 3 3 changing the reaction temperature, the AgN O concentration an the fee ing rate of AgNO solution. The size an istribution of the silver particles w ere etermine by laser iffraction, U Vvis spectroscopy an TEM . Silver particles of small size an narrow istribution w ere obtaine w hen the AgNO3 solution w as mixe imme iately w ith the re ucer . T he reaction temperature an AgNO3 concentration have complicate effects on the size istribution because of