TiO_2/GO/PAN纳米纤维膜的制备及光催化性能
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摘要
采用改性Hummers法以天然鳞片石墨制备氧化石墨烯,再经水热反应在氧化石墨烯片层中原位生成纳米级TiO_2,制备TiO_2插层氧化石墨烯(TiO_2/GO)。将TiO_2/GO粉末添加到PAN溶液中,通过静电纺丝法制备含TiO_2/GO的PAN纳米纤维膜。研究了TiO_2/GO及TiO_2/GO/PAN对亚甲基蓝的降解性能。采用TEM、SEM、XRD对降解前后样品性质进行了表征。结果表明,TiO_2/GO对亚甲基蓝具有良好的重复降解性能,随着降解次数的增加,其降解效率逐渐减弱,含TiO_2/GO的PAN纳米纤维膜对亚甲基蓝具有良好的吸附和光催化效果。
Graphene oxide(GO) is prepared from natural flake graphite by modified Hummers method.Nano-titanium dioxide is synthesized in situ in the flake layer of GO by hydrothermal reaction. Intercalation of titanium dioxide with graphene oxide(TiO_2/GO) is prepared. The PAN nanofiber membrane containing TiO_2/GO is prepared by electrospinning method with the PAN solution containing TiO_2/GO powder. The degradation of Methylene Blue by TiO_2/GO and TiO_2/GO/PAN is studied. The properties of samples before and after degradation are characterized by TEM, SEM and XRD. The results show that TiO_2/GO has a good repetitive degradation performance for Methylene Blue, and its degradation efficiency gradually decreases with the increase of degradation cycles. The PAN nanofiber membrane containing TiO_2/GO has excellent adsorption and photocatalytic property for Methylene Blue.
Graphene oxide(GO) is prepared from natural flake graphite by modified Hummers method.Nano-titanium dioxide is synthesized in situ in the flake layer of GO by hydrothermal reaction. Intercalation of titanium dioxide with graphene oxide(TiO_2/GO) is prepared. The PAN nanofiber membrane containing TiO_2/GO is prepared by electrospinning method with the PAN solution containing TiO_2/GO powder. The degradation of Methylene Blue by TiO_2/GO and TiO_2/GO/PAN is studied. The properties of samples before and after degradation are characterized by TEM, SEM and XRD. The results show that TiO_2/GO has a good repetitive degradation performance for Methylene Blue, and its degradation efficiency gradually decreases with the increase of degradation cycles. The PAN nanofiber membrane containing TiO_2/GO has excellent adsorption and photocatalytic property for Methylene Blue.
引文
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[19]李翠霞,吴强红,曾鹏飞,等.氧化石墨烯-镝掺杂二氧化钛复合光催化材料的制备及光催化性能[J].硅酸盐学报,2016,44(6):35-39.
[2]袁东.掺氮TiO2复合材料可见光催化降解酸性红3R[J].印染,2015,41(15):15-19.
[3]郭璐瑶,陈玉洪,黄涛,等.纳米TiO2的硅烷偶联剂表面接枝改性[J].印染,2015,41(4):6-11.
[4]夏阳,秦晴,何瑾馨.改性纳米TiO2薄膜光催化降解染色废水[J].印染,2008,34(4):31-33,36.
[5]王强,封严.聚丙烯腈纤维改性技术及其应用[J].合成纤维,2010(10):7-10.
[6]高春涛,王清清,徐筱琳,等.PAN-O/MMT复合纳米纤维膜的制备及染料吸附性能[J].水处理技术,2012,38(7):33-36.
[7]薛朝华,张明明,贾顺田.聚丙烯腈纳米纤维空气过滤膜的制备及其性能[J].陕西科技大学学报,2018,36(1):1-6.
[8]孙洋洋.磁性氧化石墨烯/TiO2复合光催化剂的制备及其光催化降解染料废水的研究[D].西安:长安大学,2015.
[9]张琼,贺蕴秋,陈小刚,等.氧化钛/氧化石墨烯复合结构及其光催化性能[J].科学通报,2010,55(7):620-628.
[10] XU Z W, WU T F, SHI J, et al. Photocatalytic antifouling PVDF ultrafiltration membranes based on synergy of graphene oxide and TiO2for water treatment[J]. Journal of Materials Science.2016, 520:281-293
[11] HAMMAD M, UMAIR A Q, MUHAMMAD M, et al. Removal of lead from aqueous solution using polyacrylonitrile/magnetite nanofibers[J]. Environmental Science and Pollution Research,2017:1~8.
[12] UMMER S W, OFFEMA R. Preparation of graphitic oxide[J]. J Am Chem Soc. 1958, 80(6):1339.
[13]邓玲娟,古元梓,徐维霞,等.二氧化钛-石墨烯复合物的制备及其光催化性质[J].应用化学,2012,29(8):943-946.
[14]金春吉.二氧化钛/石墨烯复合材料的制备及其光催化性能的研究[D].吉林:吉林大学,2014.
[15] LOZOVSKYI O, GUNDUZ G, DUKKANCI M, et al. Preparation and characterisation of silver-or copper-doped TiO2catalysts and their catalytic activity in dye degradation[J]. Color Technol,2015, 131(3):245-254.
[16]刘洪军,彭超.TiO2/SrTiO3复合薄膜的制备及其光催化性能[J].兰州理工大学学报,2014,40(5):5-9.
[17] BABAU K, HATADA R. Synthesis and properties of TiO thin films by plasma source 2ion implantation[J]. Surface and Coatings Technology, 2001(136):241-243.
[18]陆乃彦,张亚强,吴世嘉.还原氧化石墨烯-TiO2复合纳米材料制备与光催化性能[J].南京大学学报(自然科学版),2016,52(6):1097-1103.
[19]李翠霞,吴强红,曾鹏飞,等.氧化石墨烯-镝掺杂二氧化钛复合光催化材料的制备及光催化性能[J].硅酸盐学报,2016,44(6):35-39.