Effects of redox mediators on alpha-Fe2O3 exposed by {012} and {104} facets for photocatalytic water oxidation
Effects of redox mediators on alpha-Fe2O3 exposed by {012} and {104} facets for photocatalytic water oxidation
复制标题
氧化还原介体对 {012} 和 {104} 面暴露的 α-Fe2O3 光催化水氧化的影响
DOI：
10.1016/j.apcatb.2016.11.028
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yang Hua Gui
中科院分区：
文献类型：
--
作者：
Wang Yu Lei;Li Yu Hang;Wang Xue Lu;Hou Yu;Chen Ai Ping;Yang Hua Gui
氧化还原介体转移光生电子的机理研究对于人工Z型光催化系统是非常理想的。在这里，我们发现{012}和{104}面暴露的α-Fe2O3可以促进IO3−的还原，从而显着提高光催化水氧化的活性。采用NaIO3作为电子受体，主要暴露在{012}和{104}面的α-Fe2O3光催化剂的析氧活性（309.4 μmol h−1g−1）是主要暴露在{101}和{111}面的α-Fe2O3光催化剂的析氧活性（3.68 μmol h−1g−1）的84倍。我们预计这项工作的发现可能为进一步开发增强型 Z 型光催化系统打开大门。
The mechanism study of redox mediator to transfer the photogenerated electrons is extremely desirable for artificial Z-scheme photocatalytic systems. Here we find that the α-Fe2O3exposed by {012} and {104} facets can facilitate the reduction of IO3−, which results in increasing the activity of photocatalytic water oxidation significantly. By employing NaIO3as an electron acceptor, the O2evolution activity (309.4 μmol h−1g−1) of α-Fe2O3photocatalyst mainly exposed by {012} and {104} facets is 84 times higher than that (3.68 μmol h−1g−1) of α-Fe2O3mostly exposed by {101} and {111} planes. We anticipate that the findings in this work may open the door for further development of enhanced Z-scheme photocatalytic systems.