Photocatalytic degradation of terephthalic acid using titania and zinc oxide photocatalysts: Comparative study
Photocatalytic degradation of terephthalic acid using titania and zinc oxide photocatalysts: Comparative study
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DOI：
10.1016/j.desal.2009.11.008
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发表时间：
2010-03
期刊：
影响因子：
9.9
通讯作者：
Ashraf Shafaei;M. Nikazar;M. Arami
中科院分区：
文献类型：
--
作者：
Ashraf Shafaei;M. Nikazar;M. Arami
本文研究了纳米二氧化钛和纳米氧化锌光催化降解对苯二甲酸的性能。采用紫外可见分光光度计和高效液相色谱法研究了TPA的降解情况。考察了初始pH值、催化剂负载量、TPA初始浓度和H2O2等因素对反应的影响。结果表明，在两种光催化剂存在下，TPA的光催化降解均服从准一级动力学反应。高效液相色谱法测定了TPA降解过程中草酸、甲酸、马来酸、乙酸和富马酸等脂肪族羧酸的含量。结果表明，TiO2和ZnO光催化剂都可以作为去除废水中TPA的有效光催化剂，但在优化条件下，ZnO的催化效果优于TiO2。
In this paper, the photocatalytic degradation of terephthalic acid (TPA) using titania and zinc oxide nanoparticles was investigated. UV–Vis spectrophotometer and high performance liquid chromatography (HPLC) were used to study the TPA degradation. The effect of influential parameters such as initial pH, catalyst loading, initial TPA concentration and H2O2were studied. It was found that the photocatalytic degradation of TPA obeyed the pseudo-first order kinetic reaction in the presence of both photocatalysts. The aliphatic carboxylic acids such as oxalic, formic, maleic, acetic and fumaric acids were detected by HPLC during the degradation of TPA. The results show that TiO2and ZnO photocatalysts can be employed as an effective photocatalyst for the elimination of TPA from wastewater but in optimized conditions zinc oxide was a more efficient catalyst than TiO2.