Ghosh Jyoti P, Achari Gopal, Langford Cooper H
Shell Canada Energy, 400-4th Avenue S. W., P.O Box 100, Station M,8500, Calgary, AB, Canada, T2P 2H5.
Water Environ Res. 2016 Aug;88(8):785-91. doi: 10.2175/106143015X14362865226879. Epub 2015 Oct 13.
A bench-scale flow-through photocatalytic reactor using light emitting diodes (LED) as light source and a TiO2 nanotube array (TN) as immobilized catalyst has been designed, fabricated and tested on commonly studied contaminants. The photoreactor is comprised of 144, 365-nm UV-LED lamps mounted along the inner periphery of an annular cylinder. An ordered array of TN, as catalyst, was immobilized by electrochemical anodization of a titanium cylinder and placed in the center of the reactor. Synthesized TN was characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Laboratory investigations were conducted on the photoreactor to treat 4-chlorophenol (4-CP), atrazine and methylene blue. The performance of the photoreactor at different flow rates and at varying distances of photocatalyst from the light source was monitored. The photocatalytic reaction rates increased with bubbling oxygen into the reservoir. Significant improvement was observed when H2O2 was added and degradation to detection limits was observed.
设计、制造并测试了一种实验室规模的流通式光催化反应器，该反应器以发光二极管（LED）作为光源，以二氧化钛纳米管阵列（TN）作为固定催化剂，用于处理常见的污染物。该光催化反应器由144个365纳米的紫外LED灯沿环形圆柱体内周安装而成。通过对钛圆柱体进行电化学阳极氧化，固定了作为催化剂的有序TN阵列，并将其放置在反应器中心。通过扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）对合成的TN进行了表征。在光催化反应器上进行了实验室研究，以处理4-氯酚（4-CP）、阿特拉津和亚甲基蓝。监测了光催化反应器在不同流速以及光催化剂与光源不同距离下的性能。向储液器中鼓入氧气时，光催化反应速率增加。添加过氧化氢后观察到显著改善，并观察到降解至检测限。
