不同形态二氧化钛-石墨烯复合材料的表征及光催化性能研究

Study on the Photocatalytic Property and Characterization of Composite of Graphene and Titanium Dioxide with Various Morphology

研究了二氧化钛的形态对二氧化钛-石墨烯(GN)复合材料光催化性能的影响。采用水热法制备了3种不用形态的二氧化钛,即钛纳米管(TNT)、钛纳米片(TNS)与二氧化钛纳米粒子(TNP)。采用X射线衍射、傅里叶变换红外光谱、透射电子显微镜、X射线光电子能谱、紫外-可见分光光度法等对所得的复合材料进行表征。通过在紫外灯照射下降解活性黑染料与诺氟沙星药物的混合废水测试了复合材料的光催化性能。结果表明:不同形态二氧化钛-石墨烯复合材料的光催化性能均优于纯商业用二氧化钛,所制备材料在形态上的差异对复合材料催化性能也有较大的影响。

Effect of titanium dioxide with various morphology on the photocatalytic property of the composites formed between the TiO2 （with various morphology） and graphene （GN） was studied. Titanium dioxide in 3 different morphology, i. e., nanotubes （TNT）, nanosheets （TNS） and nanoparticles （TNP） of titanium dioxide was prepared by hydrothermal method. Composites formed between TiO2 （TNT, TNS or TNP） and GN were characterized by XRD, FTIR, TEM, XPS and UV-Vis spectrometry. Photocatalytic property of the composites was tested by the degradation of mixed wastwater containing the dyestuff active black 5 and norfloxacin under irradiation of UV-lamp. As shown by the experimental results, the photocatalytic property of either of the composites of TNT-GN, TNS-GN and TNP-GN was found to be superior to that of the commercial TiO2. Significant effect on the catalytic properties of the composites formed with TiO2 of 3 different morphology was also observed.