Hierarchical porous CdS nanosheet-assembled flowers with enhanced visible-light photocatalytic H2-production performance
Hierarchical porous CdS nanosheet-assembled flowers with enhanced visible-light photocatalytic H2-production performance
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DOI：
10.1016/j.apcatb.2013.03.005
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发表时间：
2013-07-17
影响因子：
22.1
通讯作者：
Yu, Jiaguo
中科院分区：
文献类型：
--
作者：
Xiang, Quanjun;Cheng, Bei;Yu, Jiaguo
以Cd（OH）（2）和Na 2S为前驱体，通过简单的离子交换法合成了多级多孔CdS纳米片组装花.所制备的CdS花具有较高的可见光光催化产氢活性，在420 nm处的产氢速率为468.7 μ mol·h ~（-1），相应的表观量子效率（QE）为24.7%，是CdS纳米粒子的3倍多。这种增强的光催化H-2-产生活性是因为纳米片和多孔纳米片结构的分级组织可以有效地增强光吸收能力并提供更多数量的活性吸附位点而实现的。本工作显示了多级多孔CdS纳米片组装花在光催化H-2生产中的巨大潜力，也表明Cd（OH）（2）中间体的离子交换策略可以扩展到制备其他具有多级纳米结构的多孔氧化物和硫化物。(c)2013爱思唯尔有限公司版权所有。
Hierarchical porous CdS nanosheet-assembled flowers were synthesized by a simple ion-exchange strategy using morphology-analogous Cd(OH)(2) and Na2S as precursors. The prepared CdS flowers exhibited high visible-light photocatalytic H-2-production activity with a rate of 468.7 mu mol h(-1) and the corresponding apparent quantum efficiency (QE) of 24.7% at 420 nm, which exceeded that obtained on CdS nanoparticles by more than 3 times. This enhanced photocatalytic H-2-production activity was achieved because the hierarchical organization of nanosheets and porous nanosheet structures can efficiently enhance light-absorption ability and provide a greater number of active adsorption sites. This work shows a great potential of hierarchical porous CdS nanosheet-assembled flowers for photocatalytic H-2 production, and also demonstrates that the ion-exchange strategy of Cd(OH)(2) intermediates can be extended to the preparation of other porous oxides and sulfides with hierarchical nanostructures. (c) 2013 Elsevier B.V. All rights reserved.