太原理工大学学报

2019, v.50;No.225(05) 562-567

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TiO_2/x-GO纳米复合纤维的制备及其光催化性能的研究
Preparation and Photocatalytic Properties of TiO_2/x-GO Nano-composite Fibers

陈星;张琦;汤彬;王海燕;姚启明;王健美;李睿;周冰科;林万明;李双寿;
CHEN Xing;ZHANG Qi;TANG Bin;WANG Haiyan;YAO Qiming;WANG Jianmei;LI Rui;ZHOU Bingke;LIN Wanming;LI Shuangshou;College of Materials Science and Engineering, Taiyuan University of Technology;Fundamental Industry Training Center, Tsinghua University;Key Laboratory of Green Printing, Institute of Chemistry Chinese Academy of Sciences;

摘要(Abstract):

为了提高TiO_2半导体的光催化性能,以钛酸四丁酯为钛源,氧化石墨烯(GO)粉末为添加剂,制备了不同GO浓度的前驱体溶液,然后采用静电纺丝法制备了TiO_2/x-GO纳米复合纤维。利用XRD,SEM表征分析了纳米复合纤维的物相结构、成分、结晶性和微观形貌。将纳米复合纤维加入亚甲基蓝溶液中,以可见光照射条件下亚甲基蓝的光催化降解率来表征纳米复合纤维的光催化性能。结果表明:添加GO粉末可降低TiO_2的团聚,提高其在纤维中的分散性,增大TiO_2/x-GO纳米复合纤维的比表面积;GO与TiO_2形成的异质结有利于提高TiO_2纳米复合纤维的结晶性和光催化性能。TiO_2/2-GO的光催化效果达到最佳,降解60 min时可达到99%的降解率。此外,使用静电纺丝制备的TiO_2/x-GO纳米复合纤维可避免TiO_2在使用过程的损耗而造成的浪费,更好地满足工业废水处理的需求。
To improve the photocatalytic properties of TiO_2, the electrospinning solution with different GO concentrations was prepared by using tetrabutyl titanate as titanium source and graphene oxide(GO) powder as additive. TiO_2/x-GO nano-composite fibers were prepared by electrospinning. The phase structure, composition, crystallinity and morphology of fibers were characterized by XRD and SEM. The photocatalytic degradation rate of methylene blue under visible light irradiation was used to characterize the photocatalytic performance of nanocomposite fibers. The results show that the addition of GO powder reduced the agglomeration of TiO_2, improved its dispersion in the fiber, and increased the specific surface area of TiO_2/x-GO nanocomposite fibers by adding them into methylene blue solution. Furthermore, the heterojunction formed by GO and TiO_2 was beneficial to increasing the crystallinity and photocatalytic properties of TiO_2 nanocomposite fibers. The photocatalytic effect of TiO_2/2-GO was optimal, and the degradation rate of 99% was achieved in 60 min. In addition, the TiO_2/x-GO nano-composite fibers prepared by electrospinning prevented TiO_2 from loss, and could satisfy the application of industrial wastewater treatment.

关键词(KeyWords): 静电纺丝;二氧化钛;氧化石墨烯;光催化活性;复合材料
electrospinning;titanium dioxide;graphene oxide;photocatalytic activity;composite materials

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基金项目(Foundation): 国家重点研发计划项目(2017YFB1402000)

作者(Author): 陈星;张琦;汤彬;王海燕;姚启明;王健美;李睿;周冰科;林万明;李双寿;
CHEN Xing;ZHANG Qi;TANG Bin;WANG Haiyan;YAO Qiming;WANG Jianmei;LI Rui;ZHOU Bingke;LIN Wanming;LI Shuangshou;College of Materials Science and Engineering, Taiyuan University of Technology;Fundamental Industry Training Center, Tsinghua University;Key Laboratory of Green Printing, Institute of Chemistry Chinese Academy of Sciences;

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