Li Kui, Chen Rong, Li Shun-Li, Han Min, Xie Shuai-Lei, Bao Jian-Chun, Dai Zhi-Hui, Lan Ya-Qian
Jiangsu Key Laboratory of Biofunctional Materials , School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210023 , P. R. China . Email:
State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China.
Chem Sci. 2015 Sep 1;6(9):5263-5268. doi: 10.1039/c5sc01586c. Epub 2015 Jun 18.
We designed and successfully fabricated a ZnS/CdS 3D mesoporous heterostructure with a mediating Zn Cd S interface that serves as a charge carrier transport channel for the first time. The H-production rate and the stability of the heterostructure involving two sulfides were dramatically and simultaneously improved by the careful modification of the interface state a simple post-annealing method. The sample prepared with the optimal parameters exhibited an excellent H-production rate of 106.5 mmol h g under visible light, which was 152 and 966 times higher than CdS prepared using ethylenediamine and deionized water as the solvent, respectively. This excellent H-production rate corresponded to the highest value among the CdS-based photocatalysts. Moreover, this heterostructure showed excellent photocatalytic stability over 60 h.
我们首次设计并成功制备了一种具有介导Zn-Cd-S界面的ZnS/CdS三维介孔异质结构，该界面作为电荷载流子传输通道。通过简单的退火后处理方法对界面态进行精细调控，涉及两种硫化物的异质结构的产氢速率和稳定性得到了显著且同时的提高。采用最佳参数制备的样品在可见光下表现出优异的产氢速率，为106.5 mmol h g，分别比以乙二胺和去离子水为溶剂制备的CdS高152倍和966倍。这一优异的产氢速率是基于CdS的光催化剂中的最高值。此外，这种异质结构在60小时内表现出优异的光催化稳定性。
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