O2对铁掺杂玻璃纤维负载TiO2光催化降解苯酚的影响

摘要

Fe3 + Doping modification of TiO2 was coated on glass fiber as composite, and a photo-catalytic process used to remove trace phenol in wastewater was investigated. Oxygen was used as the initiator. Results showed that compared with N2 ,the bubble of 02 can significantly improve the efficiency of photo-catalytic. With 250 W UV365 as the light source,under the condition of pH 3 ~5 and O2 of 1.0 L/(min·L), phenol mineralization rate could reach about 81 % with the initial phenol concentration of 30 mg/L and reaction time of 120 min.%采用三价铁对TiO2进行掺杂改性,并以玻璃纤维为载体,将改性后的TiO2负载到其表面,形成光催化反应填料,以高压汞灯为光源,进行水中苯酚的光催化降解,反应过程中引入O2,以促进水中HO·的生成,重点考察了O2的引发作用对光催化氧化的影响.结果表明,O2的加入对HO·的产生有显著的引发作用,可明显提高光催化效率.在( UV365 )250 W光源照射下,pH值为3～5,O2通入量1.0 L/( min·L),反应器内上升流速为0.7 m/min等实验条件下,初始浓度为30 mg/L的苯酚废水,经120 min光催化反应后,其矿化率可达83％以上.