氮、铅改性二氧化钛光催化活性的研究  

Research for Photo-catalysis Activity of TiO_2 Modified with Nitrogen and Plumbum

作　　者：王振华[1] 主沉浮[1] 董厚欢[1] 蔡元兴[2] 

机构地区：[1]山东大学化学与化工学院,济南250100 [2]山东建筑大学材料学院,济南250101

出　　处：《材料工程》2008年第5期66-70,共5页Journal of Materials Engineering

摘　　要：以TiO2为基体,用N修饰Pb掺杂的TiO2进行改性,提高其光催化活性,0.5%(质量分数)Pb-N改性的TiO2,可将20 mg/L的甲基橙水溶液在35 min内完全降解。用扫描电镜、X射线衍射、X射线光电子能谱及紫外可见光谱进行了样品表征,并讨论了催化活性提高的机理:可能是改性样品中的Pb和N元素起到了协同作用,降低了TiO2的带隙能,提高了对可见光的吸收能力。The Pb doped titanium dioxides were modified with nitrogen to enhance its photo-catalysis activity of TiO2. The experimental results showed that TiO2 modified with N-0. 5% Pb（mass fraction） could degrade aqueous methyl orange （20mg/L） within 35min. Meanwhile, particles＇ appearances were characterized by XPS, XRD, SEM and UV-VIS, and discussed the mechanism for the enhancement of photo-catalysis activity： titanium dioxides modified with N-Pb had a synergistic effect that could decrease the energy of band gap and increase the visible absorption capacity of samples.

关 键 词：二氧化钛 改性 光催化活性 

分 类 号：TB321[一般工业技术—材料科学与工程] O643.3[理学—物理化学]