溶液共存阳离子对CdS光催化降解罗丹明B性能的影响  

Effect of Several Cations on CdS Photocatalytic Degradation Rhodamine B

作　　者：王琼生[1] 王世铭[1] 王诣婧[2] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350108 [2]华中师范大学化学学院,湖北武汉430079

出　　处：《福建师范大学学报（自然科学版）》2009年第6期47-51,共5页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金资助项目(2006J0251/U0650007;ZD513009);福建省教育厅基金资助项目(JB05313)

摘　　要：采用水热方法制备了纳米硫化镉光催化剂.借助粉末X-射线衍射(XRD),固体紫外可见漫反射光谱(DRS)对合成产物进行了表征.以纳米CdS和本体CdS作为可见光的光催化剂,用难降解的离子型染料罗丹明B为探针分子,讨论了溶液常见的共存金属离子种类、质量分数对CdS光催化降解罗丹明B的影响.结果表明:共存离子Cu2+对CdS光催化降解罗丹明B起抑制作用,Ag+对CdS光催化降解罗丹明B没有显著影响,而共存离子Fe3+和Pr3+能显著地提高纳米、本体CdS光催化剂降解罗丹明B的降解速率,最佳的离子质量分数分别为催化剂用量的0.5%和10%.Nano-crystal CdS photocatalyst was prepared by hydrothermal method. The product was characterized by X-ray diffraction （XRD） and UV-Vis diffused reflectance spectroscopy （DRS）. The effects of the variety of co-existing ions and concentration of ions on photodegradation of Rhodamine B （RhB） were investigated under the conditions of the nanocrystal CdS and bulk CdS as the visible-light photocatalyst and RhB as a molecule Probe. The results show that the co-existing ion Cu^2＋ was found to inhibit the activity of photocatalysis, the co-existing ion Ag^＋ had not significant effect on photocatalysis reaction, and the co-existing ions Pr^3＋ and Fe^3＋ can significantly improve the photodegradation of RhB with the nanocrystal CdS or bulk CdS, and the optimal mass fraction of Fe^3＋ is 0. 5% of CdS mass and Pr^3＋ is 10%.

关 键 词：纳米硫化镉 光催化 罗丹明B 金属离子 

分 类 号：O612.3[理学—无机化学]