纳米ZnO的可控合成及其光催化性能  

Controllable synthesis of ZnO and its photocatalytic activity

作　　者：井立强[1] 孙婉婷[1] 谢明政[1] 孟庆强[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2011年第4期475-479,共5页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(21071048);黑龙江大学高层次人才(创新团队)支持计划项目(Hdtd2010-02);哈尔滨市科技创新人才(优秀学科带头人)研究专项资金资助项目

摘　　要：发展了一种相分离的化学沉淀-溶剂热合成纳米ZnO的方法,以硝酸锌为原料,实现了纳米ZnO的可控合成,并通过XRD、SEM、PL光谱等方法对样品进行了表征。重点研究了氨水、聚乙二醇(PEG)的引入等对ZnO的生长及形貌的影响。结果表明:氨水的引入能够促进ZnO的产生,并且对其粒径尺寸和取向生长有一定的调控作用。PEG的引入对ZnO的取向生长有明显的诱导作用。所获得的一维ZnO纳米棒表现出高的活性,这与其具有高的光生载流子分离效率有关。Nano-sized ZnO samples have been controlled synthesized by a two-phase separated precipitation- solvothermal process by using zinc nitrate as raw materials, and also were characterized by X-ray diffraction （ XRD）, scanning electron microscopy （SEM） and photoluminescence （PL） spectra. The effects of the introduc- tion of ammonia and polyethylene glycol （PEG） on the formation and morphology of ZnO were investigated princi- pally. The results showed that ammonia could promote the formation of ZnO, regulate its particle size and one-di- mensional structure to some extent. PEG induced ZnO oriented growth significantly. Compared with the ZnO parti- cles, one-dimensional ZnO rods obtained has high photon-generated carrier separation efficiency, so that its photo- catalytic activity was significantly improved.

关 键 词：ZNO 化学沉淀-溶剂热法 光致发光 光催化 

分 类 号：O643[理学—物理化学] TB383.1[理学—化学]