三维花状结构α-FeOOH协同H_2O_2可见光催化降解双氯芬酸钠  

Catalytic Degradation of Diclofenac Sodium over the Catalyst of 3D Flower-likeα-FeOOH Synergized with H_2O_2 Under Visible Light Irradiation

作　　者：许俊鸽[1] 李云琴[1] 黄华山[2] 苑宝玲[1,2] 崔浩杰[3] 付明来[3] 

机构地区：[1]福州大学土木工程学院,福州351020 [2]华侨大学土木工程学院,厦门361021 [3]中国科学院城市环境研究所,厦门361021

出　　处：《环境科学》2015年第6期2122-2128,共7页Environmental Science

基　　金：教育部新世纪优秀人才支持计划项目(NCET-11-0853);国家自然科学基金项目(51178117);福建省自然科学基金项目(2012J05094)

摘　　要：采用油浴回流法,在常压回流反应条件下批量制备出三维花状结构的α-Fe OOH纳米材料,并利用XRD、FT-IR和SEM等仪器对其进行分析表征;以双氯芬酸钠为目标污染物,考察三维花状结构α-Fe OOH纳米材料,在模拟太阳光照射下,催化H2O2降解有机污染物的性能.结果表明,三维花状结构α-Fe OOH由纳米棒自组装形成,纳米棒的长度约400~500 nm,直径约40~60 nm.以模拟可见光为光源,三维花状结构α-Fe OOH与H2O2构成光助异相类Fenton体系,对双氯芬酸钠有良好的光催化降解效果,在90 min内对初始浓度为30 mg·L-1的双氯芬酸钠降解去除率达到99%以上,催化降解反应以羟基自由基氧化反应为主.Three dimensional( 3D) flower-like α-Fe OOH nanomaterials were prepared by oil bath reflux method using Fe SO4,urea,ethanol and water,and the products which were characterized by XRD,FT-IR and SEM techniques. The SEM images showed that the3 D flower-like samples consisted of nanorods with a length of 400-500 nm and a diameter of 40-60 nm. The catalytic performance of the samples was evaluated by catalytic degradation of diclofenac sodium using H2O2 as the oxidant under simulated visible light. The results showed that the as-prepared samples presented high efficient catalytic performances,and more than 99% of the initial diclofenac sodium( 30 mg·L- 1) was degraded in 90 min. A radical mechanism can be proposed for the catalytic degradation of diclofenac sodium solution.

关 键 词：三维花状α-FeOOH 可见光 光助异相类Fenton 双氯酚酸钠 药品和个人护理用品 

分 类 号：X703.1[环境科学与工程—环境工程]