【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。更多还原

【Abstract】 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.更多还原