| 三维花状结构α-FeOOH协同H2O2可见光催化降解双氯芬酸钠 |
| 摘要点击 2670 全文点击 1394 投稿时间：2014-11-06 修订日期：2015-01-09 |
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| 中文关键词 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 |
| 英文关键词 3D flower-like α-FeOOH visible light photo-heterogeneous Fenton-like reaction diclofenac sodium PPCPs |
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| 中文摘要 |
| 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-FeOOH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-FeOOH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-FeOOH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-FeOOH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. |
| 英文摘要 |
| Three dimensional (3D) flower-like α-FeOOH nanomaterials were prepared by oil bath reflux method using FeSO4, urea, ethanol and water, and the products which were characterized by XRD, FT-IR and SEM techniques. The SEM images showed that the 3D 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. |
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