可见光照射下SiW_(12)O_(40)^(4-)/Resin光催化剂活化H_2O_2降解染料的研究  

Degradation of Dyes by Photocatalyst SiW_(12)O_(40)^(4-)/Resin with H_2O_2 under Visible Light Irradiation

作　　者：雷鹏翔[1] 陈春城[1] 马万红[1] 赵进才[1] 

机构地区：[1]中国科学院化学研究所光化学实验室,北京100080

出　　处：《化学学报》2005年第17期1551-1553,F0005,共4页Acta Chimica Sinica

基　　金：973计划(No.2003CB415006);国家自然科学基金(Nos.50221001;50436040and20407016)资助项目

摘　　要：将杂多酸(SiW12O44-0)负载到阴离子交换树脂上,得到SiW12O44-0/Resin(SWR)固相光催化剂,在可见光的照射下,可以有效地活化H2O2降解染料.以罗丹明B(RhodamineB,RhB)为模型化合物,研究了不同条件下RhB的降解动力学,以及降解过程中其UV-vis光谱及体系的总有机碳(TotalOrganicCarbon,TOC)变化情况,结果表明RhB的共轭芳环结构被破坏,矿化率为24.2%.其它染料如孔雀绿(MalachiteGreen,MG)和吖啶橙(AcridineOrange,AO)等也可以被降解和矿化.催化剂的循环实验表明SWR固相光催化剂易于分离,并且具有良好的稳定性,可以重复利用.A heterogeneous polyoxometalate photocatalyst, SiW12O40^4-/Resin （SWR）, was obtained by loading SiW12O40^4- on an anionic exchange resin and used to activate H2O2 for the efficient degradation of dyes under visible light irradiation. Rhodamine B （RhB） was employed as a model compound for the kinetic study in the photoreaction. The variations of the UV-vis spectra of RhB and the total organic carbon changes of the system indicated that the aromatic structure of RhB dye was decomposed, with a mineralization content of 24.2%. Similarly, dyes such as malachite green and acridine orange could also be degraded and mineralized. The recycle experiment suggested the excellent stability and reusability of the heterogeneous SWR photocatalyst.

关 键 词：杂多酸 树脂 光催化剂 降解 总有机碳 矿化 降解动力学 催化剂活化 可见光照射 H2O2 

分 类 号：O643.3[理学—物理化学] X791[理学—化学]