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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
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
