磁性活性碳负载F掺杂纳米二氧化钛的光催化性质研究  

Photocatalytic Properties of Magnetic Activated Carbon Supported F-doped TiO_2

作　　者：林晓霞[1] 吉翔[2] 付德刚[2] 郝凌云[1] 

机构地区：[1]金陵科技学院材料工程学院,南京211169 [2]东南大学生物电子学国家重点实验室,南京210096

出　　处：《无机材料学报》2013年第9期997-1002,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(51172043)~~

摘　　要：通过溶胶-凝胶法制备F掺杂纳米TiO2(F-TiO2),将其负载到磁性活性碳(MAC)上,制得易回收分离的高效催化剂(F-TMAC)。通过XRD、SEM、UV-Vis、XPS、VSM对样品进行表征。以合成样品为催化剂降解模拟废水活性染料艳红(X-3B),结果表明该负载型催化剂在紫外光和可见光照射下光催化效果均优于P25催化剂。0.2 g负载型催化剂分别在紫外光和可见光照射下降解200 mL浓度为100 mg/L的X-3B溶液,90 min后经18 W紫外光照射X-3B去除率达到99.8%;250 W可见光照射X-3B去除率为83.1%。溶液中的复合催化剂可以用磁铁很容易分离,具有优良的重复利用性能。经5次重复试验,复合催化剂F-TMAC对X-3B的降解率仅下降了约6.0%。Fluorine-doped TiO2 （F-TiO2） prepared by Sol-Gel method was coated on magnetic activated carbon, and the magnetically separable composite photocatalyst （F-TMAC） was synthesized. The prepared samples were charac- terized by XRD, SEM, UV-Vis, XPS and vibrating sample magnetometer （VSM）. The photocatalytic activity was de- termined by degradation of 100 mg/L reactive brilliant red （X-3B） in a 200 mL aqueous solution with 0.2 g catalyst. The results showed that the photocatalytic activity of such type catalyst was better than that of Degussa P25. The deg- radation ratio of X-3B was 99.8% under 18 W UV lamp irradiation and 83.1% under 250 W visible lamp irradiation, respectively. Furthermore, the photocatalyst can be separated easily by an external magnetic field with good reuse performance. The degradation ratio of X-3B was decreased by 6% after 5 cycles.

关 键 词：磁性活性碳 磁分离 氟掺杂二氧化钛 光催化 

分 类 号：O643[理学—物理化学]