制备工艺对纳米氧化锌颗粒大小和催化活性的影响  

The Influence of a Preparation Method to the Size of Zno Nanoparticles and Catalytic Activity

作　　者：王振宇[1] 李福芸[1] 曹海南 马涛[1] 

机构地区：[1]北京印刷学院,北京102600

出　　处：《北京印刷学院学报》2014年第2期72-75,共4页Journal of Beijing Institute of Graphic Communication

基　　金：北京市2013年本科生科研计划项目(08150113054)

摘　　要：采用气相沉积法和水热法制备纳米氧化锌,分析了不同工艺条件对纳米氧化锌颗粒大小的影响。以罗丹明B为模拟污染物,研究了不同工艺条件下纳米氧化锌的光催化效率。结果表明：采用两种不同方法制备的纳米氧化锌均为六方晶系纤锌矿结构。气相沉积法制备的样品颗粒粒径大小为51.73-41.39nm；对罗丹明B的降解率最高可达95.24%。采用水热法制备纳米氧化锌,有机添加剂对纳米氧化锌的性能有一定的影响,不添加有机化合物制备的样品颗粒粒径为68.94nm,对罗丹明 B 降解率为85.28%；添加不同有机化合物,颗粒粒径大小为68.91-45.94nm,对罗丹明B降解率为86.96%-73.43%。在相同条件下,气相沉积法制备的纳米氧化锌颗粒粒径更小,对罗丹明B的降解率更高。Chemical vapor deposition and hydro-thermal methods have been investigated in the synthesis of ZnO nanoparticles （ NPs ） respectively. The analysis of effect of different preparation strategies on the morphologies and size distribution of the ZnO NPs has also been probed. Rhodamine B is used to simulate the pollutant in analyzing the photocatalytic property of nano-ZnO synthesized via different pathways. The experimental results indicate that the nano-ZnO particles prepared in different methods own the six hexagonal wurtzite structure. The feature size of nano-ZnO particles synthesized by chemical vapor deposition ranges from 41.39nm to 51.73nm and the maximum degradation ratio of rhodamine B by nano-ZnO can reach 95.24%. Organic additives have been proved to exert an apparent influence on the photocatalytic per-formances of ZnO NPs synthesized through hydro-thermal＆amp;nbsp;method. Specifically,without the organic additives, the average particle size of ZnO NPs is around 68.94nm, with the corresponding photodegradation ratio 85.28% in eliminating rhodamine B. The size of nano-ZnO particles ranges from 68.91nm to 45.94nm when add with different organic compounds and the relative photodegradation ratio ranges from 86.96% to 73.43%. Under otherwise identical conditions, the feature size of nano-ZnO particles synthesized by chemical vapor deposition has a larger diameter than the size of ZnO NPs synthesized through hydro-thermal method. The maximum degradation ratio of rhodamine B by nano-ZnO particles which synthesized via chemical vapor deposition is higher than The maximum degradation ratio of rhodamine B by nano-ZnO particles prepared through hydro-thermal method.

关 键 词：纳米ZNO 气相沉积法 水热法 光催化 

分 类 号：O614.241[理学—无机化学]