TiO_(2)改性伊蒙粘土的制备及其降解罗丹明B活性研究

Preparation of TiO_(2) Modified Illite-smectite Clay and Its Degradation Activity of RhB

作为有机染料生产和消耗大国,如何高效绿色地降解废水中的染料成为我国环境保护面临的重要课题。利用可见光催化降解染料,具有绿色环保低能耗的明显优势,高活性低成本的光催化剂是实现此过程的关键。伊蒙粘土(I-S)是广西特有的天然矿物,是由蒙脱石晶层和伊利石晶层组成的特殊片层状结构硅酸盐矿物,经改性后可作为光催化剂的载体。据此,该研究以一种以钛柱撑法改性后的伊蒙粘土为光电子传输载体,TiO_(2)作为活性组分的复合光催化剂。实验结果表明,此催化剂比常见的TiO_(2)光催化剂具有更高的活性,在可见光照射下,罗丹明B染料的降解率在2小时后达到95%。

Photocatalytic degradation technology has become one of the important technologies for water pollution control in recent years.In this paper,we chose TiO_(2) as a photocatalytic active substance,and illite-smectite(I-S)clay was selected as a photoelectron transport carrier to prepare TiO_(2)-Ti(I-S)by hydrothermal method.I-S is from Guangxi and has advantages of natural pollution-free and good dispersity.The experimental results showed that TiO_(2)-Ti(I-S)had higher photocatalytic activity for degradation of RhB than that of TiO_(2) or I-S,and the degradation rate can reach 98%after 2 h.