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用改进的Hummers法制得了氧化石墨烯,以Ti(SO4)2为钛源,氨水为氮源,在400℃煅烧下制备了锐钛矿型的氮元素掺杂的TiO2(N-TiO2)。利用溶液混合法将二者混合,再经水热处理法制备了不同质量复合比例的N-TiO2/RGO光催化剂。通过X射线衍射、Fourier变换红外光谱、扫描电子显微镜等对样品的组成与形貌进行了表征,并通过降解1×10–4mol/L亚甲基蓝溶液表征了各样品的光催化效率。结果表明:掺杂氮元素一定程度上提高了TiO2的光催化效能,与石墨烯的复合更进一步改善了N-TiO2光催化效能。
The graphene oxide was prepared by a modified Hummers method. Anatase-type nitrogen-doped TiO2 (N-TiO2) was prepared by calcining titania with Ti (SO4) 2 and ammonia as the nitrogen source. N-TiO2 / RGO photocatalysts with different mass ratios were prepared by the solution mixing method and the hydrothermal method. The composition and morphology of the samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. The photocatalytic efficiency of each sample was characterized by degradation of 1 × 10-4 mol / L methylene blue solution. The results showed that the doped nitrogen increased the photocatalytic activity of TiO2 to a certain extent, and the composite with graphene further improved the photocatalytic activity of N-TiO2.