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采用溶胶-凝胶法制备了系列不同原子摩尔比的Eu3+离子掺杂纳米TiO2光催化剂,通过XRD,SEM和UV-V is等测试手段对纳米TiO2晶型、颗粒度大小、形貌以及光学性能进行了表征;并以甲基兰溶液为目标物,对所制备样品的光催化活性进行了研究。结果表明,稀土Eu3+离子的掺杂能有效抑制纳米TiO2的晶型的转变进而减小晶粒尺寸、提高分散度;稀土Eu3+离子的掺杂使TiO2光催化剂紫外-可见吸收有一定的蓝移,并在可见区有一定的吸收峰;稀土Eu3+离子的掺杂有效提高了TiO2光催化剂的活性,并在本实验条件下,当掺杂原子摩尔比为1%、退火温度500℃时,对甲基兰溶液的光催化活性最强。
A series of Eu3 + ion-doped nano-TiO2 photocatalysts with different molar ratios were prepared by sol-gel method. The crystal structure, particle size, morphology and optical properties of TiO2 were characterized by XRD, SEM and UV- The characterization was carried out. The photocatalytic activity of the prepared samples was also studied with methyl blue solution as the target. The results show that the doping of rare earth Eu3 + ions can effectively inhibit the transformation of the crystal form of nano-TiO2 and reduce the grain size and dispersion; the doping of rare earth Eu3 + ions makes the UV- And has some absorption peaks in the visible region. The doping of rare earth Eu3 + ions effectively improves the activity of TiO2 photocatalyst. Under the experimental conditions, when the dopant molar ratio is 1% and the annealing temperature is 500 ℃, Kieran’s solution has the highest photocatalytic activity.