| LiNbO3不同晶面的光催化产氢性能 | |
| Anisotropy in Photocatalytic Hydrogen Evolution of LiNbO3 (001), (100) and (110) Faces | |
| 摘要: 研究了LiNbO3 (001)、(100)和(110)晶面的光催化产氢性能。(001)、(100)和(110) 3个晶面光催化产氢性能之比为7.8:1.3:1.0。LiNbO3 [001]晶向存在电偶极矩和自发极化,有利于增加光生电子和空穴的分离效率,减少光生电子和空穴的复合,提高LiNbO3 (001)面的光催化活性。LiNbO3 (001)面的空穴有效质量最小,有利于光生空穴的迁移,从而减少光生电子和空穴的复合,也有利于光催化性能的提高。 | |
| 关键词: 催化 光催化产氢 LiNbO3 晶面 | |
| 基金项目: 国家重点基础研究发展计划(973计划,No.2013CB632404,2014CB239303)、国家自然基金(No.51272102,21073090,51272101)资助项目。 | |
| Abstract: A remarkable difference in photocatalytic activity for H2 production over LiNbO3 (001), (100) and (110) faces is reported. LiNbO3 crystal faces follow the reactivity order of (001)>(100)>(110) for photocatalytic hydrogen evolution, and the ratio of photocatalytic hydrogen evolution performance for faces (001), (100), (110) is 7.8:1.3:1.0. The electric dipole moment and spontaneous polarization exist along [001] of LiNbO3, thus increasing the separation efficiency of photogenerated carriers, depressing their recombination, and improving the activity for photocatalytic hydrogen evolution. Also, the effective mass of hole for LiNbO3 (001) is much less than those for LiNbO3 (100) and (110), which favors the mobility of photogenerated holes and cuts down the recombination of photogenerated carriers. Therefore, LiNbO3 (001) exhibits the best activity for photocatalytic hydrogen evolution among these samples. | |
| Keywords: catalysis photocatalytic H2 evolution LiNbO3 crystal face | |
| 投稿时间：2014-07-25 修订日期：2014-09-15 | |
| 摘要点击次数: 1857 | |
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| 宋琰,李朝升,邹志刚.LiNbO3不同晶面的光催化产氢性能[J].无机化学学报,2014,30(11):2484-2488. | |
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