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采用氧化石墨(GO)和硫酸钛作为初始反应物,在低温下(80℃)制备了纳米级的氧化钛-氧化石墨插层(TiO2-GO)复合材料,研究了这一复合材料的紫外光催化性能.结果表明,在采用TiO2-GO插层复合材料对甲基橙溶液进行紫外光催化降解时,其降解效率η=1.17mg·min-1·g-1,明显优于德固赛P25氧化钛粉.通过对TiO2-GO插层复合材料进行X射线衍射(XRD)、傅里叶红外(FT-IR)光谱、X射线光电子能谱(XPS)和场发射扫描电子显微镜(FESEM)等测试,表征了产物的晶相结构、界面状况及其显微结构.结果表明:插层结构中的TiO2晶粒为锐钛矿和金红石的混合相,且锐钛矿相含量大于金红石相含量;氧化石墨层间的含氧基团如C襒O,基本被还原.对TiO2-GO插层复合材料的形成机理以及该材料具有优越光催化性能的原因进行了探讨.
Nanometer titanium oxide-graphite oxide intercalation (TiO2-GO) composite was prepared at low temperature (80 ℃) using graphite oxide (GO) and titanium sulfate as initial reactants. The effects of UV light The results showed that the degradation efficiency of methyl orange solution was η = 1.17mg · min-1 · g-1, which was significantly better than that of Degussa P25 Titanium dioxide powder.An X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM) The crystal structure, interfacial condition and microstructure of the product were characterized and measured.The results show that the crystal phase of TiO2 is a mixed phase of anatase and rutile, and the content of anatase phase is larger than that of rutile phase. The oxygen-containing groups, such as C 襒 O, between graphite oxide layers are basically reduced. The formation mechanism of TiO2-GO intercalation composites and the reason why the material has excellent photocatalytic properties were discussed.