新型磁性黏土光催化材料的制备及其性能
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摘要
配置Fe Cl2、Fe Cl3和ATTs的悬浊液,在氮氛下通过协同沉淀法制得Fe3O4-ATTs纳米晶体。然后再通过溶胶凝胶法负载Ti O2获得Ti O2-Fe3O4-ATTs纳米复合材料。通过SEM、XRD、VSM对材料分析可知Ti O2和Fe3O4晶体被成功负载于ATTs表面。同时研究了复合材料在不同p H、剂量和H2O2条件下对酸性红B染料去除效果的影响。在回收再生试验中,材料在重复使用六次后,流失率仅为10.1%,复合材料显示出良好的光催化活性和回收性能。
Fe3O4-Attapulgite nanoparticles were prepared by a co-precipitation technique under a nitrogen atmosphere in this paper.An aqueous suspension of attapulgite was modified with Fe Cl2 and Fe Cl3. Then Ti O2 was loaded onto the surface of the Fe3O4-Attapulgite by the sol-gel method. After sufficient dried,the colloidal solution was heated at 773 K in a muffle furnace,which forming Ti O2-Fe3O4-Attapulgite composite. Ti O2 and Fe3O4nanoparticles loaded successfully were confirmed by scanning electron microscopy( SEM),X-ray diffraction( XRD) analysis and vibrating sample magnetometry( VSM). The effects of p H,dosage and H2O2 on acid red B removal were studied. The results show there is only 10. 1% mass loss after six cycles. The composite material has good photocatalytic performance and recycling properties.
Fe3O4-Attapulgite nanoparticles were prepared by a co-precipitation technique under a nitrogen atmosphere in this paper.An aqueous suspension of attapulgite was modified with Fe Cl2 and Fe Cl3. Then Ti O2 was loaded onto the surface of the Fe3O4-Attapulgite by the sol-gel method. After sufficient dried,the colloidal solution was heated at 773 K in a muffle furnace,which forming Ti O2-Fe3O4-Attapulgite composite. Ti O2 and Fe3O4nanoparticles loaded successfully were confirmed by scanning electron microscopy( SEM),X-ray diffraction( XRD) analysis and vibrating sample magnetometry( VSM). The effects of p H,dosage and H2O2 on acid red B removal were studied. The results show there is only 10. 1% mass loss after six cycles. The composite material has good photocatalytic performance and recycling properties.
引文
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[3]刘宏芳,江德顺,唐和清,等.H2O2增效Ag+掺杂Zn O纳米晶光催化体系降解亚甲基蓝[J].华中科技大学学报(自然科学版),2007,35(10):101-104.
[4]Bouna L,Rhouta B,Amjoud M,et al.Synthesis,characterization and photocatalytic activity of Ti O2supported natural palygorskite microfibers[J].Applied Clay Science,2011,52(3):301-311.
[5]Xia S,Liu F,Ni Z,et al.Ti-based layered double hydroxides:Efficient photocatalysts for azo dyes degradation under visible light[J].Applied Catalysis B:Environmental,2014,144(5):570-579.
[6]Zhang Z,Xu Y,Ma X,et al.Microwave degradation of methyl orange dye in aqueous solution in the presence of nano-Ti O2-supported activated carbon(supported-Ti O2/AC/MW)[J].Journal of Hazardous Materials,2012,148(209-210):271-277.
[7]Zhang L,Lv F,Zhang W,et al.Photo degradation of methyl orange by attapulgite-Sn O2-Ti O2nanocomposites[J].Journal of Hazardous Materials,2009,171(1-3):294-300.
[8]Bradley W F.The Structural Scheme of Attapulgite[J].American Mineralogist,1940,6(25):401-405.
[9]Qi Z,Ye H,Xu J,et al.Improved the thermal and mechanical properties of poly(butylene succinate-co-butylene adipate)by forming nanocomposites with attapulgite[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2013,421(9):109-117.
[10]Huang J,Liu Y,Jin Q,et al.Adsorption studies of a water soluble dye,Reactive Red MF-3B,using sonication-surfactant-modified attapulgite clay[J].Journal of Hazardous Materials,2007,169(1-2):541-548.
[11]Xue A,Zhou S,Zhao Y,et al.Effective NH2-grafting on attapulgite surfaces for adsorption of reactive dyes[J].Journal of Hazardous Materials,2011,147(194):7-14.
[12]Ma J,Zou J,Li L,et al.Nanocomposite of attapulgite-Ag3PO4for Orange II photodegradation[J].Applied Catalysis B:Environmental,2014,83(10):36-40.
[13]Zhong W,Liu P,Wang A.Facile approach to magnetic attapulgite-Fe3O4/polystyrene tri-component nanocomposite[J].Materials Letters,2012,85(11):11-13.
[14]金名惠,吴自清,唐和清.Ti O2/Si O2/Fe3O4的制备及其对溴氨酸降解的光催化活性[J].华中科技大学学报(自然科学版).2006,34(10):108-110.
[15]Pan J,Xu L,Dai J,et al.Magnetic molecularly imprinted polymers based on attapulgite/Fe3O4particles for the selective recognition of 2,4-dichlorophenol[J].Chemical Engineering Journal,2011,174(1):68-75.
[16]Helmy A K,de Bussetti S G,Ferreiro E A.The surface energy of palygorskite[J].Powder Technology,2007,171(2):126-131.
[17]Fan Q,Li P,Chen Y,et al.Preparation and application of attapulgite/iron oxide magnetic composites for the removal of U(VI)from aqueous solution[J].Journal of Hazardous Materials,2011,173(3):1851-1859.