不同形貌的ZnO的制备及其可见光催化降解性能研究

Preparation of ZnO with Different Morphology and the Research of Visible-Light Photocatalytic Degradation Property

采用Zn-EG/H2O-AC体系,即以醋酸锌为原材料,乙二醇/水为溶剂,加入聚乙二醇-2000,溶剂热法制备了四种形貌的ZnO可见光催化材料。探索了乙二醇与水的体积比n对ZnO的形貌的影响,并以罗丹明B(RhB)模拟有机物染料,研究了不同形貌的ZnO在可见光下的催化降解性能。实验结果表明,当n=5为中空球状ZnO催化活性最好,n=11为双蘑菇状,n=2为瓜子状,n=0.5时为子弹头状,其在可见光下照射3h,对RhB催化降解率分别为100%、83%、55%、60%。

ZnO visible-light photocatalysis materials with four morphologies are prepared with solvo-thermal method through Zn-EG/H2 O-AC system ,i .e .adopting zinc acetate as the raw material and gly-col/water as the solvent and adding polyethylene glycol-2000 .The effects of volume ratio of glycol to wa-ter on ZnO morphology are investigated .Besides ,photocatalytic degradation property of ZnO with differ-ent morphologies under visible light is studied through simulating organic dyes with Rhodamine B （RhB） . The experimental results show when the ratios of water and ethylene glycol were 5 ,11 ,2 ,0 .5 ,the mor-phologies of ZnO turned to be accordingly hollow sphere ,double mushrooms ,melon feed and bullet ;w hen the ratio is 5 ,catalytic activity of ZnO is the best ;w hen exposed to visible light for 3 h ,RhB degradation rates are 100% .,83% ,55% and 60% .