催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (8): 1417-1422.DOI: 10.3724/SP.J.1088.2012.20348

• 研究论文 • 上一篇    下一篇

活性炭-铁酸镍磁性催化剂的光催化性能

冯连荣, 胡丰田, 刘成宝, 陈丰, 徐楠, 刘守清a, 陈志刚b   

  1. 苏州科技学院化学与生物工程学院, 江苏省环境功能材料重点实验室, 江苏苏州 215009
  • 收稿日期:2012-03-23 修回日期:2012-06-13 出版日期:2012-08-01 发布日期:2012-08-01

Photocatalytic Properties of Activated Carbon-NiFe2O4 Magnetic Catalyst

FENG Lianrong, HU Fengtian, LIU Chengbao, CHEN Feng, XU Nan, LIU Shouqinga, CHEN Zhigangb   

  1. Jiangsu Key Laboratory for Environmental Functional Materials, College of Chemistry and Bioengineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
  • Received:2012-03-23 Revised:2012-06-13 Online:2012-08-01 Published:2012-08-01

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1274

被引次数

29

摘要： 以活性炭、NiSO4•6H2O 和 FeCl3•6H2O 为主要原料, 在 180 oC 水热反应 10 h 制得了磁性纳米材料活性炭-铁酸镍 (AC-NiFe2O4), 采用 X 射线粉末衍射法、傅里叶变换红外光谱法、扫描电镜法、透射电镜法及振动样品磁强计对样品进行了表征. 在可见光λ > 400 nm 照射下,以 AC-NiFe2O4 为异相芬顿催化剂, 在草酸存在下研究了亚甲蓝、罗丹明 B 和孔雀石绿光催化降解反应. 结果表明, 未掺杂 AC 的 NiFe2O4 在可见光辐射下基本不催化降解有机物; 而掺杂活性炭后反应 10 h 内 20.0 mg/L 有机模拟污染物降解率达到 90% 以上. 催化剂重复循环使用 8 次以上, 其催化活性基本不变. 可见 AC-NiFe2O4 有望用于光催化降解有机污染物中.

关键词: 活性炭, 铁酸镍, 异相芬顿催化剂, 可见光, 催化降解

Abstract: Activated carbon-nickel ferrite (AC-NiFe2O4) has been successfully synthesized using activated carbon, NiSO4·6H2O, and FeCl3·6H2O as the raw materials by the hydrothermal method at 180 oC for 10 h. The as-synthesized sample was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and vibrating sample magnetometer. The photo-Fenton degradations of model pollutants methylene blue, rhodamine B, and malachite green were conducted in the presence of oxalic acid using AC-NiFe2O4 as photo-Fenton catalyst under λ > 400 nm visible light. The results showed that the AC-NiFe2O4 catalyst can effectively decompose the organic pollutants under visible light irradiation and the degradation ratio of organic pollutants in the concentration of 20.0 mg/L reached over 90% in 10 h, whereas the NiFe2O4 catalyst appeared no photocatalytic activity under the similar conditions. The catalytic activity did not exhibit significant loss after 8 runs, showing the potential application of AC-NiFe2O4 as an effective photo-Fenton catalyst to degrade organic pollutions.

Key words: activated carbon, nickel ferrite, heterogeneous Fenton catalyst, visible light, catalytic degradation