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为了研究过渡金属电荷补偿共掺TiO_2中载流子的分离与复合问题,本文采用溶胶-凝胶法制备了Mo单掺和(Mo+Co)共掺TiO_2,测量了样品的光催化性能.实验结果表明,Mo单掺TiO_2比(Mo+Co)共掺TiO_2有较低的载流子复合率以及更好的光催化性能.在不同比例(Mo+Co)共掺样品中,电荷完全补偿共掺样品的载流子复合率最高,而可见光催化效果却是所有共掺样品中最好的,其原因可能是它对可见光的吸收相对较高.讨论了钼钴电荷补偿共掺对载流子分离与复合的影响机制.
In order to study the separation and recombination of carriers in transition metal charge-compensated co-doped TiO_2, Mo single-doped (Mo + Co) co-doped TiO_2 was prepared by sol-gel method and the photocatalytic properties of the samples were measured. The results show that Mo single-doped TiO_2 with (Mo + Co) co-doped TiO_2 has a lower charge carrier recombination rate and better photocatalytic activity. In the samples doped with different proportions of Mo + Co, The carrier recombination rate of the doped samples is the highest, but the visible light photocatalytic activity is the best among all the co-doped samples, which may be due to its relatively high absorption of visible light. Mechanism of separation and compounding.