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以钛酸丁酯和硝酸镨为原料,采用水热法制备Pr掺杂的纳米TiO2。通过XRD、SEM以及Raman UVVis DRS等实验方法研究了样品的晶体结构以及光响应性能。结果表明,水热合成条件对镨掺杂纳米TiO2的形貌及光催化性能有显著的影响。其中在5 mol/L的NaOH碱液环境下,控制水热处理温度为150℃,水热时间为12 h,掺镨量为0.5%(质量分数),热处理温度为500℃,所合成的一维镨掺杂纳米TiO2光催化效果最优。另Pr3+掺杂使纳米TiO2提高了对可见光的吸收能力,并使其吸光域红移约50 nm。
Titanium tetrabutoxide and praseodymium nitrate were used as raw materials to prepare Pr doped nano-TiO2 by hydrothermal method. The crystal structure and photoresponse of the samples were investigated by XRD, SEM and Raman UVVis DRS experiments. The results show that hydrothermal conditions have a significant influence on the morphology and photocatalytic activity of praseodymium doped nano-TiO2. Under the condition of 5 mol / L NaOH alkali solution, the temperature of hydrothermal treatment is 150 ℃, the hydrothermal time is 12 h, the content of praseodymium is 0.5% (mass fraction) and the temperature of heat treatment is 500 ℃. Praseodymium doped nano-TiO2 has the best photocatalytic activity. In addition, Pr3 + doping enhanced the absorption of visible light by nano-TiO2 and red-shifted its absorption band by about 50 nm.