TiO2纳米粉体应用于光催化领域存在光吸收仅局限于紫外光区域、难以回收等缺点,因此,纳米TiO2固定化和可见光改性成为光催化领域的两个研究热点.本文采用绿色环保的水热法,将TiO2负载于玄武岩纤维载体上,在较低的温度下制备出一种新型的玄武岩纤维/TiO2复合材料.使用XRD分析了复合材料的物相结构,采用SEM观测了复合材料的形貌,并对水热法合成其机理进行了分析.结果表明:150℃水热条件下、反应10 h合成的玄武岩纤维/TiO2复合材料中,颗粒状的TiO2涂层均匀包覆于玄武岩纤维表面,并没有改变玄武岩纤维结构,形成了一种具有核壳结构的新型玄武岩纤维/TiO2复合材料,经过TiO2修饰的玄武岩纤维对可见光有很好吸收.因此,玄武岩纤维/TiO2复合材料是一种具有潜在应用价值的可见光催化材料.
Nano-TiO2 powder has some disadvantages in the photocatalytic fields,such as light absorption is only limited to UV region,difficult to recycling,et al,so immobilizing and visible-modifying nano-TiO2 become two research hotspots in this field.In this paper,TiO2 was loaded on the basalt fibers carriers,a novel basalt fibers/TiO2 composite material was synthesized by a green hydrothermal method at lower temperature.The phase structure of the samples was examined by X-ray diffraction,and the microstructure was examined by scanning electron microscope.The mechanism of hydrothermal technique was briefly discussed.The results show that the surface of basalt fibers was coated by a uniform TiO2 grains at 150 ℃ with reaction 10 h,and have no different phases structure,the composite materials are core-shell structures,the TiO2 modified basalt fibers had higher visible light absorption,so the obtained materials have potential application in the field of Visible-Light-Driven photocatalysts.
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