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Construction of CoSx–ZnIn2S4 hollow nanocages derived from metal–organic frameworks for efficient photocatalytic hydrogen production
New Journal of Chemistry ( IF 3.3 ) Pub Date : 2021-06-29 , DOI: 10.1039/d1nj00973g
Hongyu Ma 1, 2, 3, 4 , Yaqi Tan 1, 2, 3, 4 , Zhifei Liu 1, 2, 3, 4 , Jianhong Wei 1, 2, 3, 4 , Rui Xiong 1, 2, 3, 4
Affiliation  

Smart heterogeneous structures and rational photocatalyst design play an important role in photocatalytic hydrogen production. In this study, ZnIn2S4 (ZIS) nanosheets were grown in situ on the surface of CoSx hollow nanocages, derived from ZIF-67 metal–organic frameworks, to obtain hierarchical CoSx/ZnIn2S4 (CZIS) hollow heterostructured nanocages. The CZIS composites exhibited significant enhanced photocatalytic H2 evolution performance as compared with pure ZIS and CoSx. The optimal content of CoSx was about 30 wt% and the corresponding H2 production rate was 1538.4 μmol g−1 h−1, which was approximately 6.1 times that of the pure ZnIn2S4. The improved photocatalytic performance of the CZIS hollow nanocages was attributed to their hollow morphology and well-matched band structure. The hollow structure was favorable to the absorption and utilization of light because of the multiple reflections of light in the cavity. The close surface contact of CoSx and ZnIn2S4 not only enhanced the carrier separation and inhibited the recombination of photogenerated carriers but it also provided a fast electron transport channel, resulting in significantly improved photocatalytic performance. This study has confirmed that hollow CoSx polyhedra may be a potential alternative to precious metal photocatalytic co-catalysts for the hydrogen generation.

中文翻译:

由金属-有机骨架衍生的 CoSx-ZnIn2S4 空心纳米笼的构建用于高效光催化制氢

智能异质结构和合理的光催化剂设计在光催化制氢中起着重要作用。在这项研究中,ZnIn 2 S 4 (ZIS) 纳米片源自 ZIF-67 金属有机骨架的 CoS x空心纳米笼表面原位生长,以获得分层的 CoS x /ZnIn 2 S 4 (CZIS) 空心异质结构纳米笼。与纯ZIS 和CoS x相比,CZIS 复合材料表现出显着增强的光催化H 2析出性能。CoS x的最佳含量约为 30 wt%,相应的 H 2产率为1538.4 μmol g -1 h -1,约为纯ZnIn 2 S 4 的6.1倍。CZIS 空心纳米笼改善的光催化性能归因于它们的空心形态和匹配良好的能带结构。由于光在腔内多次反射,中空结构有利于光的吸收和利用。CoS x与ZnIn 2 S 4的紧密表面接触不仅增强了载流子分离,抑制了光生载流子的复合,而且提供了一个快速的电子传输通道,从而显着提高了光催化性能。该研究证实,空心 CoS x多面体可能是贵金属光催化制氢助催化剂的潜在替代品。
更新日期:2021-07-16
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