摘要:
以十六烷基三甲基溴化铵(CTAB)/环己烷/正丁醇/水为主要原料,通过反相微乳液法,制备了CdS/TiO2复合材料。通过场发射扫描电镜(FESEM)、X射线衍射仪(XRD)、紫外可见吸收光谱(UV-Vis-Abs)、X射线光电子能谱(XPS)对样品进行了表征。以甲基橙为目标降解物,研究了其光催化性能。结果显示:硫化镉对二氧化钛的复合修饰对其表面形貌、晶相组成、紫外吸收带边、元素组成及化合价态均有明显影响。与纯TiO2相比,CdS/TiO2的光催化活性明显提高,450 W金卤灯光照80 min,3.3%CdS/TiO2的光催化效果最好,甲基橙溶液降解率达到96.71%,复合后TiO2吸收带边出现了一定程度的蓝移。
Abstract:
CdS/TiO2 composite material was prepared by reverse-phase microemulsion method using cetyl trimethyl ammonium bromide（CTAB）,cyclohexane,n-butanol and water as main raw materials.The samples were characterized by field emission scanning electron microscopy（FESEM）,X-ray diffraction（XRD）,ultraviolet visible absorption spectrum（UV-Vis-Abs） and X-ray photoelectron spectroscopy（XPS）,respectively.The photocatalytic properties of the samples were studied with methyl orange as the target for degradation.The results show that cadmium sulfide has a significant effect on the surface morphology,crystalline composition,ultraviolet absorption band edge,element composition and chemical valence states of titanium dioxide.Compared with bare TiO2,the photocatalytic activity of CdS/TiO2 is significantly improved,and the sample of 3.3%CdS/TiO2 presents the best photocatalytic performance with a degradation rate of 96.71% for methyl orange under irradiation of 450 W gold halogen lamps for 80 min.The absorption band edge of TiO2 shows a certain blue shift after the compound.
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