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Self-assembly of a mesoporous ZnS/mediating interface/CdS heterostructure with enhanced visible-light hydrogen-production activity and excellent stability.

ABSTRACT: We designed and successfully fabricated a ZnS/CdS 3D mesoporous heterostructure with a mediating Zn1-x Cd x S interface that serves as a charge carrier transport channel for the first time. The H2-production rate and the stability of the heterostructure involving two sulfides were dramatically and simultaneously improved by the careful modification of the interface state via a simple post-annealing method. The sample prepared with the optimal parameters exhibited an excellent H2-production rate of 106.5 mmol h-1 g-1 under visible light, which was 152 and 966 times higher than CdS prepared using ethylenediamine and deionized water as the solvent, respectively. This excellent H2-production rate corresponded to the highest value among the CdS-based photocatalysts. Moreover, this heterostructure showed excellent photocatalytic stability over 60 h.

SUBMITTER: Li K 

PROVIDER: S-EPMC5500944 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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Self-assembly of a mesoporous ZnS/mediating interface/CdS heterostructure with enhanced visible-light hydrogen-production activity and excellent stability.

Li Kui K   Chen Rong R   Li Shun-Li SL   Han Min M   Xie Shuai-Lei SL   Bao Jian-Chun JC   Dai Zhi-Hui ZH   Lan Ya-Qian YQ  

Chemical science 20150618 9

We designed and successfully fabricated a ZnS/CdS 3D mesoporous heterostructure with a mediating Zn<sub>1-<i>x</i></sub> Cd <sub><i>x</i></sub> S interface that serves as a charge carrier transport channel for the first time. The H<sub>2</sub>-production rate and the stability of the heterostructure involving two sulfides were dramatically and simultaneously improved by the careful modification of the interface state <i>via</i> a simple post-annealing method. The sample prepared with the optimal  ...[more]

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