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Hierarchical Architectured Ternary Nanostructures Photocatalysts with In(OH)3 Nanocube on ZnIn2S4/NiS Nanosheets for Photocatalytic Hydrogen Evolution
Solar RRL ( IF 6.0 ) Pub Date : 2020-03-30 , DOI: 10.1002/solr.202000027
Lin Ye 1, 2 , Zhenhai Wen 1 , Zhaohui Li 3 , Haitao Huang 2
Affiliation  

Charge carriers separation and surface catalytic reactions are two crucial steps in photocatalytic processes; the rational design of photocatalysts by taking these two factors into consideration is thus of great importance to advance the associated performance. Herein, a self‐sacrificial strategy is developed to fabricate a ternary nanostructure photocatalyst, forming a hierarchical architecture of In(OH)3 nanocube decorated NiS‐ZnIn2S4 (ZIS) hybrid nanosheets (ZIS/In(OH)3‐NiS). Such a unique structure provides the hybrid photocatalyst with a facilitated path for efficiently separating the charge carrier and abundant sites for catalytic reactions. Systematic characterizations that reveal the strong electronic interactions in the ternary ZIS/In(OH)3‐NiS leads to fast electron transfer from excited ZnIn2S4 to NiS nanosheets, which provide catalytic sites for hydrogen evolution reaction. The comprehensive photocatalysis studies demonstrate that ZnIn2S4/In(OH)3‐NiS exhibits ultrahigh photocatalytic activity toward hydrogen generation with a high rate of 7010 μmol g−1 h−1, which ranks as one of the highest among ZnIn2S4‐based photocatalysts reported so far. This work provides an attractive and effective way to develop high‐activity photocatalysts without using precious metal cocatalysts. The investigation brings us one step closer to understanding the structure‐determining properties of nanohybrid architecture, and provides a valuable reference to develop cost‐effective and practical photocatalysts for a variety of applications.

中文翻译:

ZnIn2S4 / NiS纳米片上具有In(OH)3纳米立方体的分层结构三元纳米结构光催化剂,用于光催化氢的释放

载流子的分离和表面催化反应是光催化过程中的两个关键步骤。因此,考虑到这两个因素,对光催化剂进行合理设计对于提高相关性能至关重要。本文提出了一种自我牺牲策略来制备三元纳米结构光催化剂,从而形成了In(OH)3纳米立方体装饰的NiS-ZnIn 2 S 4(ZIS)杂化纳米片(ZIS / In(OH)3-NiS)。这种独特的结构为杂化光催化剂提供了一条便利的途径,可以有效地分离电荷载体和丰富的催化反应位点。系统特性揭示了三元ZIS / In(OH)3 -NiS中的强电子相互作用,从而导致电子迅速从激发的ZnIn 2 S 4转移到NiS纳米片,从而为析氢反应提供了催化位点。全面的光催化研究表明,ZnIn 2 S 4 / In(OH)3 -NiS对氢的生成表现出超高的光催化活性,并具有7010μmolg -1  h -1的高速率。到目前为止,它是ZnIn 2 S 4基光催化剂中最高的之一。这项工作为开发高活性光催化剂而不使用贵金属助催化剂提供了一种有吸引力且有效的方法。该研究使我们更进一步地了解了纳米杂化体系结构的结构确定特性,并为开发适用于各种应用的具有成本效益的实用光催化剂提供了宝贵的参考。
更新日期:2020-03-30
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