摘要
采用溶胶-凝胶法,在电场热处理条件下,合成了晶粒尺寸为40～50nm的TiO2-ZrO2复合薄膜。通过X光电子能谱（XPS）及X射线衍射（XRD）分析,确定了部分N原子在TiO2网络结构中以取代O原子的形式存在,即复合薄膜中形成了非整比化合物TiO2-xNx;通过紫外可见光谱（UV-VIS）测试薄膜的吸收光谱,观察到掺N复合薄膜的吸收截止波长为550nm,复合薄膜对500nm左右的可见光波段仍有显著吸收,说明吸收边发生了红移;光催化实验表明：在紫外及可见光催化下,掺N复合薄膜对大肠杆菌的灭菌率均有较大提高,以取代形式掺杂的N对窄化带隙和提高可见光催化活性起到了非常重要的作用。
The nitrogen-doped TiO2-ZrO2 co-extruded film with the grain size of 40～50 nm has been synthesized by sol-gel process in electric field. The XPS and XRD analysis show that some of the nitrogen-atom substitutes the oxygen-deficient in the co-extruded film and TiO2-xNx compound appears. The Einstein shift in the optical absorbance spectrum of the nitrogen-doped co-extruded film is also observed by UV-VIS, and the cut wavelength approximates 550 nm. The photocatalysis result shows that the inactivation rate to colibacillus increases largely for the nitrogen-doped co-extruded film at both of UV and VIS lights. It could be concluded that the doped nitrogen substitution in form is effective to narrow the gap and enhance the photocatalysis.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第5期758-761,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50472007)资助
作者简介
梅乐夫，男，1978年生，博士生，清华大学材料科学与工程系，北京100084，电话：010—62773392，E—mail：mlf00@mails．thu．edu．cn
