C/Fe_3O_4@TiO_2三元复合光催化剂的制备及可见光催化性能
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摘要
采用水热法合成Fe-MOF作为前驱体,再采用溶胶凝胶法在表面包裹TiO_2,制备出不同比例的C/Fe_3O_4@TiO_2三元复合光催化剂,运用X射线衍射仪、扫描电子显微镜以及能谱仪对C/Fe_3O_4@TiO_2复合光催化剂进行结构表征。结果表明:制备出1∶10的C/Fe_3O_4@TiO_2的光催化效率最好,亚甲基蓝的降解率可以达到95.2%,循环使用5次仍可达91.8%,同时有较高的光利用率,可回收利用,在水污染处理等方面有一定的价值。
The Fe-MOF was synthesized by hydrothermal method and then coated with TiO_2 on the surface by sol-gel method. Different proportions of C/Fe_3O_4@TiO_2 three element composite photocatalyst were prepared. The composite was characterized by X ray diffractometer, scanning electron microscope and energy dispersive spectrometer. The results showed that the 1∶10 porous carbon/Fe_3O_4@TiO_2 photocatalyst had better adsorption and catalytic efficiency. The degradation rate of methyl blue could reach 95.2%, and it could still reach 91.8% after five times of recycling. Meanwhile it had higher photocatalytic efficiency and recyclability, which had certain value in water pollution treatment.
The Fe-MOF was synthesized by hydrothermal method and then coated with TiO_2 on the surface by sol-gel method. Different proportions of C/Fe_3O_4@TiO_2 three element composite photocatalyst were prepared. The composite was characterized by X ray diffractometer, scanning electron microscope and energy dispersive spectrometer. The results showed that the 1∶10 porous carbon/Fe_3O_4@TiO_2 photocatalyst had better adsorption and catalytic efficiency. The degradation rate of methyl blue could reach 95.2%, and it could still reach 91.8% after five times of recycling. Meanwhile it had higher photocatalytic efficiency and recyclability, which had certain value in water pollution treatment.
引文
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[2] GAO Q,XU J,BU X-H.Recent advances about metal-organic frameworks in the removal of pollutants from wastewater[J].Coordination Chemistry Reviews,2019(378):17-31.
[3] 贾晓晨.磁性光催化剂Fe3O4@SiO2@TiO2的制备及应用研究[D].天津:天津科技大学,2017.
[4] CHEN J,SHU J,ANQI Z,et al.Synthesis of carbon quantum dots/TiO2 nanocomposite for photo-degradation of Rhodamine B and cefradine[J].Diamond and Related Materials,2016(70):137-144.
[5] LIU X,DANG R,DONG W,et al.A sandwich-like heterostructure of TiO2 nanosheets with MIL-100(Fe):A platform for efficient visible-light-driven photocatalysis[J].Applied Catalysis B:Environmental,2017,209:506-513.
[6] 郭星,孙婷,于常武,等.磁性TiO2/rGO-Fe3O4复合光催化剂的制备及性能研究 [J].应用化工,2018,47(10):2135-2139.
[7] 蒋栋栋,卢晓涵,俞伟樑,等.立方块型Fe3O4表面修饰TiO2磁性复合光催化剂的制备及光降解性能研究 [J].化学试剂,2018,40(6):533-536.
[8] HUANG J,SONG H,CHEN C,et al.Facile synthesis of N-doped TiO2 nanoparticles caged in MIL-100(Fe) for photocatalytic degradation of organic dyes under visible light irradiation[J].Journal of Environmental Chemical Engineering,2017,5(3):2579-2585.
[9] MH B,N M,D E,et al.Evaluation of photocatalytic degradation of 2,4-dinitrophenol from synthetic wastewater using Fe3O4@SiO2@TiO2/rGO magnetic nanoparticles[J].Journal of Molecular Liquids,2018(264):571-578.
[10] 刘宏伟.Fe3O4/g-C3N4复合光催化剂的制备及其催化性能的研究[D].兰州:兰州交通大学,2018.
[11] QIN R,MENG F,KHAN M W,et al.Fabrication and enhanced photocatalytic property of TiO2-ZnO composite photocatalysts[J].Materials Letters,2019(240):84-87.
[12] 饶砚迪,盛义平,刘琦,等.Fe3O4-xTiO2复合光催化剂的制备及其对染料废水的处理效果 [J].化工环保,2018,38(2):180-184.
[13] ZHANG Y F,QIU L G,YUAN Y P,et al.Magnetic Fe3O4@C/Cu and Fe3O4@CuO core-shell composites constructed from MOF-based materials and their photocatalytic properties under visible light[J].Applied Catalysis B:Environmental,2014(144):863-869.
[14] ANGAMUTHU M,SATISHKUMAR G,LANDAU M V.Precisely controlled encapsulation of Fe3O4 nanoparticles in mesoporous carbon nanodisk using iron based MOF precursor for effective dye removal[J].Microporous and Mesoporous Materials,2017(251):58-68.
[15] GUAN W,GAO X,JI G,et al.Fabrication of a magnetic nanocomposite photocatalysts Fe3O4@ZIF-67 for degradation of dyes in water under visible light irradiation[J].Journal of Solid State Chemistry,2017(255):150-156.
[16] 师艳婷,乔生莉,张巧玲,等.磁性光催化剂Fe3O4/SiO2/TiO2的制备及光催化降解苯酚 [J].化工进展,2018,37(11):4322-4329.
[17] WANG D,JIA F,WANG H,et al.Simultaneously efficient adsorption and photocatalytic degradation of tetracycline by Fe-based MOFs[J].Journal of Colloid and Interface Science,2018(519):273-284.
[18] STEFAN M,LEOSTEAN C,PANA O,et al.Magnetic recoverable Fe3O4-TiO2:Eu composite nanoparticles with enhanced photocatalytic activity[J].Applied Surface Science,2016(390):248-259.
[19] AGHAMALI A,KHOSRAVI M,HAMISHEHKAR H,et al.Preparation of novel high performance recoverable and natural sunlight-driven nanocomposite photocatalyst of Fe3O4/C/TiO2/N-CQDs[J].Materials Science in Semiconductor Processing,2018(87):142-154.
[20] CHEN Z,FU M L.Recyclable magnetic Fe3O4@SiO2/β-NaYF4∶Yb3+,Tm3+/TiO2 composites with NIR enhanced photocatalytic activity[J].Materials Research Bulletin,2018(107):194-203.
[21] LI Q Y,MA K R,MA Z J,et al.Preparation and enhanced photocatalytic performance of a novel photocatalyst:Hollow network Fe3O4/mesoporous SiO2/TiO2 (FST) composite microspheres[J].Microporous and Mesoporous Materials,2018(265):18-25.
[22] SEO Y K,YOON J W,LEE J S,et al.Large scale fluorine-free synthesis of hierarchically porous iron(Ⅲ) trimesate MIL-100(Fe) with a zeolite MTN topology[J].Microporous and Mesoporous Materials,2012(157):137-145.
[23] 庄金亮,刘湘粤,张宇,等.室温水相制备MIL-100(Fe)纳米材料及其光降解有机染料性能研究[J].化工新型材料,2019,47(1):259-263.
[24] 任倩,何汉兵,张丽,等.CTAB辅助合成MIL-100(Fe)及其NO-CO催化性能[J].功能材料,2018,49(4):4018-4023.