论文部分内容阅读
以钛酸四丁酯为钛源,甘氨酸为模板剂,水热法合成纳米Ti O2/Cu O复合材料,采用XRD、SEM、FT-IR、XPS、UV-VIS DRS等分析手段对Ti O2/Cu O复合材料的晶型结构、形貌、粒径及组成进行表征。结果表明,XRD、SEM证实Ti O2/Cu O复合材料由锐钛矿型Ti O2和Cu O组成,形貌呈花瓣薄片状纳米花球,花瓣厚约15 nm;FT-IR、XPS表明其含有Ti—O键和Cu—O键,且Ti呈+4价、Cu呈+2价;UV-VIS DR显示其在紫外-可见光区具有显著的光吸收能力。相比P25型Ti O2,Ti O2/Cu O复合材料具有较好的光催化性能,光催化降解亚甲基蓝(MB)的效率高达85%。这可能由于Ti O2/Cu O复合材料具有宽的可见光区域和窄的带隙,以及Cu O对电子的捕获,促进了光生电子和空穴有效分离。
Titanium tetrabutoxide as titanium source and glycine as templating agent were used to synthesize nano-Ti O2 / CuO composite by hydrothermal method. XRD, SEM, FT-IR, XPS and UV- Cu O composites were characterized by their crystal structure, morphology, particle size and composition. The results show that X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that Ti O2 / CuO composites consist of anatase Ti O2 and CuO. Ti-O bond and Cu-O bond, Ti is +4 valence and Cu is +2 valence. UV-VIS DR shows remarkable optical absorption in the UV-Vis region. The photocatalytic degradation of methylene blue (MB) by photodegradation was as high as 85% compared with that of P25 Ti O2. This may be due to Ti O2 / Cu O composite with a wide visible region and a narrow bandgap, as well as the capture of electrons by Cu O, which promotes the efficient separation of photogenerated electrons and holes.