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Fe3O4@SiO2@TiO2-AC光催化降解水源水中腐殖酸

Photocatalytic degradation of humic acid in source water by FeO@SiO@TiO-AC
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摘要 采用共沉淀法耦合溶胶-凝胶法制备了核壳结构的磁性颗粒Fe3O4@SiO2@TiO2,将其负载在活性炭(AC)表面,制得新型光催化剂Fe3O4@SiO2@TiO2-AC。采用SEM、FTIR、XRD、VSM对材料进行表征,并探究该催化剂对水中腐殖酸(HA)的去除效能。结果表明,以400 W高压汞灯作为光源,投加量为200 mg/L时,60 min内对初始质量浓度为5 mg/L、pH为7的含HA水样去除率可达96.1%。Fe3O4@SiO2@Ti O2-AC对HA的光催化降解符合LangmuirHinshelwood(L-H)动力学模型。Fe3O4@SiO2@TiO2与AC存在协同作用,可有效增强复合光催化剂的催化效能。材料具有较好的催化稳定性,5次重复使用后,对水样中HA的去除率仍能达到84.7%。 Fe3O4@SiO2@TiO2 magnetic material of core-shell structure was prepared by coprecipitation coupled solgel method,which was loaded on activated carbon(AC)to prepare a new photocatalyst Fe3O4@SiO2@TiO2-AC.The material was characterized by SEM,FTIR,XRD,VSM,and the degradation efficiency of HA in water by which was also investigated.The results indicated that,for a HA water sample with the initial mass concentration of 5 mg/L and the p H of 7,the catalytic removal rate reached 96.1%when 400 W high pressure mercury lamp was used as light source,the catalyst dosage was up to 200 mg/L and the reaction time last for 60 min.Furthermore,the photocatalytic reaction process conforms to the Langmuir-Hinshelwood kinetic model.There was a synergistic effect between Fe3O4@SiO2@TiO2 and AC,which could effectively enhance the catalytic performance of photocatalyst.The material has good catalytic stability,and the photocatalytic degradation rate of HA reaches 84.7%after the 5 th cycle.
作者 冯宝瑞 刘海成 李阳 成长 曾睿 江晓西 曹家炜 陈卫 Feng Baorui;Liu Haicheng;Li Yang;Cheng Zhang;Zeng Rui;Jiang Xiaoxi;Cao Jiawei;Chen Wei(Tianping College,Suzhou University of Science and Technology,Suzhou 215009,China;College of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China)
出处 《工业水处理》 CAS CSCD 北大核心 2020年第8期55-59,74,共6页 Industrial Water Treatment
基金 国家自然科学基金重点项目(51438006) 中央高校基本科研业务费专项(2017B20514) 江苏省高等学校大学生创新创业训练计划项目(2018004)。
关键词 二氧化钛 光催化 磁性材料 活性炭 腐殖酸 Fe3O4@SiO2@TiO2-AC titanium dioxide photocatalysis magnetic materials activated carbon humic acid Fe3O4@SiO2@TiO2-AC
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