氧化锌介导的太阳辐射下的异相光催化降解有机物种。
Zinc oxide mediated heterogeneous photocatalytic degradation of organic species under solar radiation.
机构信息
Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416 004, Maharashtra, India.
出版信息
J Photochem Photobiol B. 2011 Sep 2;104(3):425-33. doi: 10.1016/j.jphotobiol.2011.04.010. Epub 2011 Apr 29.
The photocatalytic decomposition of eco-persistent toluene, salicylic acid and 4-chlorophenol with sun light in an oxygenated aqueous suspension has been studied under nanocrystalline hexagonal ZnO photocatalyst. The effect of substrate temperature onto the structural, morphological and photoactive properties has been investigated. The degradation of toluene, salicylic acid and 4-chlorophenol were achieved using a photoelectrochemical reactor module equipped with synthesized ZnO electrodes. Kinetic parameters have been investigated in terms of a first order rate equation. The rate constant (-k) for this heterogeneous photocatalysis was evaluated as a function of the initial concentration of original species. Substantial reduction in concentrations of toluene, salicylic acid and 4-chlorophenol was achieved as analyzed from COD and TOC studies. The mechanism for the degradation of toluene, salicylic acid and 4-chlorophenol could be explained on the basis of Langmuir-Hinshelwood mechanism.
在纳米晶六方 ZnO 光催化剂存在下，用太阳光在含氧水悬浮液中光催化分解环境持久性的甲苯、水杨酸和 4-氯苯酚。研究了基质温度对结构、形态和光活性的影响。使用配备合成 ZnO 电极的光电化学反应器模块实现了甲苯、水杨酸和 4-氯苯酚的降解。根据一级速率方程研究了动力学参数。通过初始浓度的函数，评估了这种多相光催化的速率常数 (-k)。通过 COD 和 TOC 研究分析，实现了甲苯、水杨酸和 4-氯苯酚浓度的大量减少。可以根据朗缪尔-欣谢尔伍德机制解释甲苯、水杨酸和 4-氯苯酚的降解机理。
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