摘要
采用水热法和焙烧法分别制备了硫掺杂纳米TiO2,通过扫描电子显微镜、X射线光电子能谱和紫外可见漫反射光谱进行了表征,以水体中的甲基橙(MO)为模拟污染物,研究了硫掺杂纳米TiO2的可见光光催化性能。结果表明,2种不同制备方法得到的硫元素掺杂TiO2均表现出可见光活性。硫元素在TiO2中分别取代了O2和Ti的位置,改变了TiO2原来的能带结构,形成新的杂质能级,从而使TiO2的吸收区间由紫外拓展到可见光区。
Sulfur-doped titania (S-TiO2) with response to visible light was prepared by hydrothermal and calcination method. The as-synthesized S-TiO2 was characterized by SEM, UV-Vis and XPS techniques. Their photocatalytic activity for decomposition of methyl orange were tested under visible light. The results showed that the sulfur-doped titania prepared by the two methods exhibited catalytic activity under visible light. Sulfur substituted O2 and Ti in titania and changed the energy band to form a new impurity energy level, which expanded the absorbance range from ultraviolet to visible light.
出处
《工业催化》
CAS
2008年第8期70-74,共5页
Industrial Catalysis
基金
广东省自然科学基金项目(05006553)
广东省科技计划项目(2005A10702002)
关键词
催化化学
TIO2
光催化
可见光活性
硫掺杂
catalytic chemistry
titania
photocatalysis
activity under visible light
sulfur doping