摘要
以活性炭、NiSO4.6H2O和FeCl3.6H2O为主要原料,在180oC水热反应10h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>400nm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10h内20.0mg/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.
Activated carbon-nickel ferrite （AC-NiFe204） has been successfully synthesized using activated carbon, NiSO4＇6H20, and FeC136H20 as the raw materials by the hydrothermal method at 180℃ 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-NiFe204 as photo-Fenton catalyst under 2 〉 400 nrn visible light. The results showed that the AC-NiFe204 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 NiFe204 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-NiFe204 as an effective photo-Fenton catalyst to degrade organic pollutions.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2012年第8期1417-1422,共6页
基金
国家自然科学基金(21107077
21071107)
绿色催化四川省高校重点实验室开放项目(LYJ1109)
苏州市环保局科研项目(B201106)
苏州科技学院研究生创新工程项目(SKCX11S_062)
江苏省高校优势学科基金~~
关键词
活性炭
铁酸镍
异相芬顿催化剂
可见光
催化降解
activated carbon
nickel ferrite
heterogeneous Fenton catalyst
visible light
catalytic degradation
