Synthesis of novel visible light responding vanadate/TiO2 heterostructure photocatalysts for application of organic pollutants
Synthesis of novel visible light responding vanadate/TiO2 heterostructure photocatalysts for application of organic pollutants
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新型可见光响应钒酸盐/TiO2异质结构光催化剂的合成用于有机污染物的应用
DOI：
10.1016/j.cej.2011.09.042
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发表时间：
2011-11
影响因子：
15.1
通讯作者：
中科院分区：
文献类型：
--
作者：
采用快速高效的离子浸渍法制备了钒酸盐接枝TiO2异质结构光催化剂，提高了TiO2的可见光活性。窄带隙接枝的钒酸盐可以吸收可见光范围内（> ~ 500nm）较低能量的光，从而使电荷转移到TiO2上，从而提高TiO2的可见光响应。此外，BiVO4接枝的tio2异质结构光催化剂对非敏化染料的降解表现出最高的可见光响应，这是因为BiVO4具有特殊的原子轨道能，促进了BiVO4在界面处向tio2的电荷转移。然而，InVO4/ tio2对光敏染料的光催化性能最好，因为梯度电荷转移最小化了能量浪费的电子-空穴复合。本文描述了钒酸盐接枝TiO2异质结构光催化剂的合成，在钒酸盐与TiO2的交界界面上进行电子/空穴转移，导致TiO2在可见光区敏化吸收，为控制和理解与TiO2光催化和光电子性质相关的电荷转移现象的导带和价带能级提供了系统的研究。
A series of vanadate grafted TiO2heterostructure photocatalyst were synthesized to enhance the visible light activity of TiO2using a rapid and efficient ion impregnate method with simultaneous formation of vanadate combined with TiO2. Grafted vanadate with narrow band gap can absorb light at significantly lower energies in the visible range (>500nm), resulting in charge transfer to TiO2, hence improving the visible light response of TiO2. Moreover, the BiVO4grafted TiO2heterostructure photocatalysts revealed highest visible light response for degradation of non-sensitized dye due to especial atom orbit energy of BiVO4, facilitating charge transfer from BiVO4to TiO2at the interface. However, the InVO4/TiO2had best photocatalytic performance for photosensitized dye due to the gradient charge transfer for minimizing the energy-wasteful electron–hole recombination. The synthesis of vanadate grafted TiO2heterostructure photocatalysts described here electron/hole transfer in junction interface of vanadate and TiO2, leading to sensitization of TiO2for absorption in the visible region and provide a systematic study for controlling and understanding the energy levels of conduction band and valence band relevant to charge-transfer phenomena for the photocatalytic and optoelectronic properties of TiO2.
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DOI：
10.1016/s1010-6030(02)00074-6
发表时间：
2002-05
影响因子：
4.3
作者：
Jinhua Ye;Z. Zou;H. Arakawa;M. Oshikiri;M. Shimoda;A. Matsushita;T. Shishido
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DOI：
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发表时间：
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影响因子：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1021/jp905173e
发表时间：
2009-08
期刊：
The journal of physical chemistry. A
影响因子：
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作者：
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通讯作者：
Kai Yu;Shaogui Yang;Huan He;Cheng Sun;Chenggang Gu;Yongming Ju