高效自组装二氧化钛纳米管阵列光电催化降解葡萄糖的动力学和机理

 研究了自组装 TiO2 纳米管 (TNAs) 光电催化降解葡萄糖的动力学和机理. 利用薄层反应器进行耗竭反应, 研究了 TNAs 表面催化反应和溶液本体-扩散层传质有关的葡萄糖降解过程. 采用电流-时间曲线以及相应的微分曲线分析了光电化学催化降解的微观进程. 结果表明, 葡萄糖的初始浓度与降解的起始电流强度符合 Langmuir 吸附等温式 I0ph = 0.00008c0/(1 + 0.69274c0) + 0.00034, 葡萄糖在 TNAs 薄膜催化剂表面的吸附为单一分子层吸附, 其光电催化降解反应符合一级反应动力学, 葡萄糖降解反应经历了三个不同的反应过程.

Kinetics and Mechanisms for Photoelectrochemical Degradation of Glucose on Highly Effective Self-Organized TiO2 Nanotube Arrays

The kinetics and mechanisms of photoelectrochemical catalytic degradation of glucose on self-organized TiO2 nanotube arrays (TNAs) were investigated. A thin-layer cell was used to obtain an exhausted reaction condition with which an overall degradation process of glucose could be identified including surface reaction on TNAs and mass transfer from body solution to the diffuse layer. Current-time (Iph-t) and the corresponding differential coefficient profiles were used to analyze the micro-processes of photo...