【摘要】 为了提高TiO₂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TiO₂/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TiO₂的团聚,提高其在纤维中的分散性,增大TiO₂/x-GO纳米复合纤维的比表面积;GO与TiO₂形成的异质结有利于提高TiO₂纳米复合纤维的结晶性和光催化性能。TiO₂/2-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TiO₂/x-GO纳米复合纤维可避免TiO₂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。更多还原

【Abstract】 To improve the photocatalytic properties of TiO₂, the electrospinning solution with different GO concentrations was prepared by using tetrabutyl titanate as titanium source and graphene oxide（GO） powder as additive. TiO₂/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 TiO₂, improved its dispersion in the fiber, and increased the specific surface area of TiO₂/x-GO nanocomposite fibers by adding them into methylene blue solution. Furthermore, the heterojunction formed by GO and TiO₂ was beneficial to increasing the crystallinity and photocatalytic properties of TiO₂ nanocomposite fibers. The photocatalytic effect of TiO₂/2-GO was optimal, and the degradation rate of 99% was achieved in 60 min. In addition, the TiO₂/x-GO nano-composite fibers prepared by electrospinning prevented TiO₂ from loss, and could satisfy the application of industrial wastewater treatment.更多还原