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首页> 外文期刊>Journal of water chemistry and technology >Photodegradation of Phenol Using TiO2, ZnO and TiO2/ZnO Catalysts in an Annular Reactor
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Photodegradation of Phenol Using TiO2, ZnO and TiO2/ZnO Catalysts in an Annular Reactor

机译：环形反应器中TiO2，ZnO和TiO2 / ZnO催化剂对苯酚的光降解

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In recent years the incorporation of ZnO as a semiconductor into other catalysts, for enhancing photodegradation processes, has gained attention. This paper describes the synthesis of a blend of metal oxide (TiO2/ZnO) photocatalyst and subsequent testing of the catalyst for the degradation of phenol in an annular photoreactor. The concentration of phenol before and after degradation was determined using Ultra-Violet-Spectroscopy (UV-Vis). Calcined TiO2/ZnO composite material with a mass loading ratio of 1: 1 exhibited the highest percentage phenol removal compared to the unblended TiO2 and ZnO systems at pH 7.2 and temperature of 25 degrees C. It was shown that about 98% phenol degradation could be achieved at initial phenol concentration of 10; 20 and 50 ppm, except for 100 ppm which gave less than 50% degradation. Thus, TiO2/ZnO blend as photocatalyst can be used for degradation of phenol in water. The pseudo-first order reaction kinetics fitted well the Langmuir-Hinshelwood model in almost all concentration ranges tested.
机译：近年来，将ZnO作为半导体掺入其他催化剂中以增强光降解过程受到关注。本文介绍了金属氧化物（TiO2 / ZnO）光催化剂共混物的合成以及随后在环形光反应器中测试苯酚降解的催化剂。使用紫外光谱法（UV-Vis）测定降解前后苯酚的浓度。与未混合的TiO2和ZnO体系在pH 7.2和温度为25摄氏度下相比，质量负载比为1：1的煅烧TiO2 / ZnO复合材料具有最高的苯酚去除率。结果表明，苯酚的降解率约为98％。在初始苯酚浓度为10时达到； 20和50 ppm，除了100 ppm降解少于50％。因此，TiO 2 / ZnO共混物作为光催化剂可用于水中苯酚的降解。在几乎所有测试浓度范围内，拟一级反应动力学都很好地拟合了Langmuir-Hinshelwood模型。

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