Effect of carbon doping on the mesoporous structure of nanocrystalline titanium dioxide and its solar-light-driven photocatalytic degradation of NOx
Effect of carbon doping on the mesoporous structure of nanocrystalline titanium dioxide and its solar-light-driven photocatalytic degradation of NOx
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DOI：
10.1021/la703333z
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发表时间：
2008-04-01
期刊：
影响因子：
3.9
通讯作者：
Yu, Jimmy C.
中科院分区：
文献类型：
--
作者：
Huang, Yu;Ho, Wingkei;Yu, Jimmy C.
以四氯化钛和二乙醇胺为前驱体，通过直接溶液相碳化法合成了有效的介孔纳米晶碳掺杂二氧化钛光催化剂。X射线光电子能谱（XPS）结果表明，二氧化钛晶格中的氧位点被碳原子取代，形成了C - Ti - O - C结构。由于碳原子对氧位点的取代，所制备的二氧化钛的吸收区域扩展到了可见光区域。在模拟太阳光照射下，在流动系统中测试了所制备样品在典型室内空气水平下对一氧化氮降解的光催化活性。这些样品在降解常见室内污染物一氧化氮方面比商业光催化剂（P25）表现出更有效的去除效率。还研究了显著影响介孔结构和室内空气去除效率的参数。
Effective mesoporous nanocrystalline C-doped TiO2 photocatalysts were synthesized through a direct solution-phase carbonization using titanium tetrachloride and diethanolamine as precursors. X-ray photoelectron spectroscopy (XPS) results revealed that oxygen sites in the TiO2 lattice were substituted by carbon atoms and formed a C-Ti-O-C structure. The absorption region of the as-prepared TiO2 was extended to the visible light region in view of the substitution for oxygen sites by carbon atoms. The photocatalytic activities of the as-prepared samples were tested in a flow system on the degradation of NO at typical indoor air levels under simulated solar-light irradiation. The samples showed a more effective removal efficiency than commercial photocatalyst (P25) on the degradation of the common indoor pollutant NO. The parameters significantly affecting the mesoporous structure and removal efficiency on indoor air were also investigated.