Dielectric constant controlled solvothermal synthesis of a TiO2 photocatalyst with tunable crystallinity: A strategy for solvent selection
Dielectric constant controlled solvothermal synthesis of a TiO2 photocatalyst with tunable crystallinity: A strategy for solvent selection
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DOI：
10.1109/inec.2010.5424889
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发表时间：
2009-07
期刊：
影响因子：
--
通讯作者：
Jianjun Wu;Xueliang Lu;Xuliang Lü;Fuqiang Huang
中科院分区：
文献类型：
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作者：
Jianjun Wu;Xueliang Lu;Xuliang Lü;Fuqiang Huang
在不添加模板或添加剂的情况下，采用一步溶剂热法制备了具有可调结晶度的相纯锐钛矿型TiO2纳米晶体。2-丙醇的介电常数最低，有利于形成结晶度最佳、光催化效率最高的TiO2纳米晶体。详细讨论了介电常数对成核和晶体生长过程的影响。制备的样品的光催化活性也在结晶度方面进行了研究。
Phase-pure anatase TiO2 nanocrystals with a tunable crystallinity have been prepared by a one-step solvothermal method in the absence of any templates or additives. 2-Propanol, which has the lowest dielectric constant of those studied, favors the crystallization of TiO2 nanocrystals with the best crystallinity, and highest photocatalytic efficiency. The effect of the dielectric constant on the processes of nucleation and crystal growth is discussed in detail. The photocatalytic activity of the as-prepared samples has also been investigated with respect to crystallinity.