Investigation on UV-A light photocatalytic degradation of an azo dye in the presence of CdO/TiO2 coupled semiconductor

被引：29

作者：

Dhatshanamurthi, P. ^{[1
]}

Subash, B. ^{[1
]}

Shanthi, M. ^{[1
]}

机构：

[1] Annamalai Univ, Dept Chem, Photocatalysis Lab, Annamalainagar 608002, Tamil Nadu, India

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2015年 / 35卷

关键词：

CdO/TiO2; Photocatalysis; UV-A light; Reactive Orange 4; Reusability; ACID BLACK 1; METHYLENE-BLUE; AGBR-ZNO; PHOTODEGRADATION; EFFICIENT; TIO2; MINERALIZATION; NANOPARTICLES; FILMS;

D O I：

10.1016/j.mssp.2015.02.069

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

CdO/TiO2 composites were prepared by sonochemically assisted sal-gel method. Initially, CdO was prepared by precipitation-thermal decomposition method and used for composites preparation. The prepared catalysts were used for the degradation of an azo dye, Reactive Orange 4 (RO 4) under UV-A light 5 wt% CdO/TiO2 composite was found to be very efficient towards RO 4 degradation, this catalyst was characterized by different characterization techniques (XRD, SEM, EDS, TEM, PL and BET surface area measurements) besides bare TiO2 was also characterized for comparison. 5 wt% CdO/TiO2 showed the best photocatalytic activity in the degradation of RO 4 compared with the bare TiO2, TiO2-P25 and CdO. The effects of operational parameters such as the amount of photocatalyst, initial pH and dye concentration have been analyzed. The mineralization of RO 4 has been confirmed by chemical oxygen demand (COD) measurements. A mechanism has been proposed for the degradation of RO 4 under UV-A light This catalyst is found to be more stable and reusable. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：22 / 29

页数：8

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