One-step synthesis of mesoporous Pt-Nb2O5 nanocomposites with enhanced photocatalytic hydrogen production activity
One-step synthesis of mesoporous Pt-Nb2O5 nanocomposites with enhanced photocatalytic hydrogen production activity
复制标题
一步合成具有增强光催化产氢活性的介孔Pt-Nb2O5纳米复合材料
DOI：
10.1039/c6ra19118e
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Wang Xuxu
中科院分区：
文献类型：
--
作者：
Zhang Hualei;Lin Qianying;Ning Shangbo;Zhou Yangen;Lin Huaxiang;Long Jinlin;Zhang Zizhong;Wang Xuxu
采用一步法合成了具有较高光催化产氢活性的介孔Pt-Nb 2 O 5光催化剂。采用X射线衍射、N2吸附-脱附等温线和透射电镜对样品的介孔结构进行了表征。Pt-Nb_2 O_5比纯Nb_2 O_5具有更高的产氢活性，其中0.8-Pt-D-M-Nb具有最好的光催化活性。此外，通过一步法合成的Pt-Nb 2 O 5显示出比通过初湿含浸法制备的Pt-Nb 2 O 5更高的光催化产氢活性; 0.8-Pt-D-M-Nb显示出9.79 mmol h−1 g−1的H2释放速率，而0.8-Pt-I-M-Nb 2 O 5显示出7.73 mmol h−1 g−1的H2释放速率。Pt-Nb_2 O_5光催化活性的提高主要归因于光生电子和空穴的有效分离。
Mesoporous Pt–Nb2O5 photocatalysts with high photocatalytic hydrogen production activity were synthesized by a one-step method. The mesoporous structure of the as-made samples was characterized by X-ray diffraction, N2 adsorption–desorption isotherms and transmission electron microscopy. Pt–Nb2O5 exhibited higher hydrogen production activity than pure Nb2O5 and 0.8-Pt–D–M–Nb exhibited the best photocatalytic activity. In addition, Pt–Nb2O5 synthesized by a one-step method exhibited higher photocatalytic hydrogen production activity than that prepared by an incipient wetness impregnation method; 0.8-Pt–D–M–Nb exhibits a H2 evolution rate of 9.79 mmol h−1 g−1, while 0.8-Pt–I–M–Nb2O5 exhibits a H2 evolution rate of 7.73 mmol h−1 g−1. The enhanced photocatalytic activity of Pt–Nb2O5 was predominantly attributed to the efficient separation of photoinduced electrons and holes.