纳米晶体TiO2光催化降解1-萘酚的路径

Pathways of 1-Naphthol Photocatalytical Degradation Using TiO_2 Nanocrystal

浓度为50 mg/L的1-萘酚废水在二次微波法制备的TiO2为催化剂、H2O2为氧化剂和紫外光组成的光催化氧化体系中常温下被彻底降解,CODcr和TOC去除率分别达到86.49%和89.36%.通过对降解反应全过程进行定时多点GC/MS检测,发现了60多种中间产物,并对中间产物的产生、变化及其相对含量与反应时间的关系进行分析、归纳.确定了1-萘酚降解的3条主要路径,全面准确地揭示了降解过程的全貌,对1-萘酚在上述氧化体系中的降解规律进行了实践和理论上的有益探索.

A photocatalytical degradation of 1-naphthol in aqueous solution by using the two-step microwave radiation under the UV light condition was investigated, with TiO2 as catalyst and H2O2 as oxidant. Results show that the removing rate of CODcr and TOC are 86.49% and 89.36% respectively. By analyzing the timing multi-point GC/MS data of the intermediate products in the whole degradation process, more than sixty kinds of intermediated products were caught. Through the method of analyzing induction, three main pathways which can reflect the panorama of the 1-naphthol degradation reaction paths were put forward. It is a beneficial exploration into the degradation of 1-naphthol aqueous on both theoretical and practical levels of study.