固相反应-微波水热合耦合制备单分散纳米硫化锌微球及性能测定  

Preparation and Characterization of Mono-dispersed ZnS Microspheres by Coupling Method of Solid Reaction and Microwave-hydrothermal

作　　者：陈志红[1] 白波[1] 王莉平[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《西安文理学院学报（自然科学版）》2008年第4期8-13,共6页Journal of Xi’an University(Natural Science Edition)

基　　金：国家发展改革委员会资助项目([陕]高技[2003]704号;874号);长安大学科研基金资助项目(05Q13)

摘　　要：以醋酸锌和硫化钠为原料,采用PEG-400晶形控制剂、固相反应-微波水热耦合技术快速获得了单分散纳米硫化锌微球.利用XRD、TEM、FT-IR及UV-Vis对产品进行了结构表征,结果表明获得的纳米硫化锌微球属于立方形晶相(闪锌矿),微球粒径为100∽150 nm,分散性好,纯度高.分析了PEG-400分子控制形成单分散纳米硫化锌微球的机理.与传统水浴热法相比,微波水热可将反应所需时间从8.0 h缩短到1.0 h,且有助于ZnS前驱物的快速晶化.酸性大红3R水溶液的光催化降解活性测试结果证实,与传统水热法获得的纳米ZnS微球相比较,微波水热获得的纳米ZnS微球表现出了更高的催化活性.Mono - dispersed ZnS micro spheres are successfully prepared via a facile and rapid coupling method of solid reaction and microwave-hydrothermal. The as-prepared products are characterized by XRD, TEM, FT-IR, and UV-Vis, respectively. The experimental results show that the structure of as-obtained ZnS product belongs to cubic crystal phase （blend phase）, and the micro spheres possess a uniform size with the diameter in a range of 100 - 150 nm. The morphology is like a sphere. The micro spheres have a good disparity and high purity. Meanwhile, the possible growth mechanisms for the formation of sphere-like structure ZnS are proposed with the presence of polyethylene glycol -400. Comparing with the conventional hydrothermal method, microwave hydrothermal progress not only has reduced the reaction from 8.0 h to 1.0 h, but also has made the precursory substrate of ZnS well-defined crystallization quickly. The test of photo catalytic performance demonstrated that ZnS products prepared by above microwave-hydrothermal route exhibits a higher catalytic activity than those of other parallel samples for the degradation of model 3R dye aqueous.

关 键 词：纳米材料 ZNS 固态反应 微波水热 

分 类 号：TQ316[化学工程—高聚物工业]