阴离子交换树脂负载铁取代杂多酸可见光催化降解罗丹明B

Visible Photocatalytic Degradation of Rhodamine B Using Fe(Ⅲ)-substituted Heteropolyanions Loaded onto the Anionic Exchange Resin

将Keggin型铁取代杂多酸阴离子PW11O39Fe(Ⅲ)(H2O)4-(PW11Fe)通过离子交换作用负载在阴离子交换树脂D301R上,制备了负载型光催化剂PW11Fe/D301R,并用于可见光催化降解水溶液中有机染料污染物罗丹明B(RhB),考察了罗丹明B的初始浓度、催化剂用量、pH值以及不同阴离子对光催化降解效果的影响。实验结果表明,当催化剂用量为0.5g时,200W金卤灯照射0.01mmol/L RhB水溶液30min,RhB的降解率可达100%,为高效利用太阳光能去除水体有机染料污染物提供了一条可供选择的新途径。

A supported photocatalyst PWll Fe/D301R was prepared by loading the keggin substituted heteropolyanions PW11O39Fe（Ⅲ）（H2O）4-（PW11Fe） onto the anionic exchange resin D301R through ion exchange, and is used for visible light degradation of organic dye contaminant rhodamine B （RhB） in aqueous solution with examination of the effects of initial RhB concentration, catalyst dosage, pH and different anions on photocatalytic degradation rate of RhB. The results show that with a catalyst dosage of 0.5 g, degradation ratio of RhB in 0. 01 mmol/L RhB solution can be up to 100% at 30 min under irradiation of 200 W halogen lamp, providing a novel way in efficient use of solar energy to removal of aquatic organic dye contaminants.