Anchoring MoS2 on ZnCdS to accelerate charge migration to promote photocatalytic water decomposition performance

IF 3.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications Pub Date : 2024-09-05 DOI:10.1016/j.mtcomm.2024.110336

Lianqing Yu, Wenjing Xie, Xiaomeng Ji, Yaping Zhang, Haifeng Zhu

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引用次数: 0

Abstract

The availability of low-cost precious metal-free photocatalysts is critical for sustainable and large-scale hydrogen production. Constructing heterojunctions is considered as an effective strategy to enhance the transfer/separation of photo-induced charges. Nanoflower structures of ZnCdS can significantly enhance light absorption and increase the specific surface area available for reactions involving photo-generated carriers. Herein, MoS are attached to ZnCdS nanoflowers through electrostatic adsorption, forming a ZnCdS-MoS composite photocatalyst for hydrogen evolution reaction (HER). Under visible light irradiation, the ZCS-MoS-8 % photocatalyst demonstrates an impressive photocatalytic HER rate of 42.07 mmol·h·g, which is 5.8 times higher than that of the pure ZnCdS photocatalyst (outperforming many reported results). The MoS nanocrystals greatly benefit the transfer of photoinduced electrons to ZnCdS for proton reduction and facilitate the transfer of holes for water oxidation. The constructed ZnCdS-MoS photocatalyst for hydrogen evolution shows promising chemical and economic value.

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在 ZnCdS 上锚定 MoS2 以加速电荷迁移，从而提高光催化水分解性能

低成本、不含贵金属的光催化剂对于可持续和大规模制氢至关重要。构建异质结被认为是增强光诱导电荷转移/分离的有效策略。ZnCdS 的纳米花结构可显著增强光吸收，并增加光生载流子反应的比表面积。在这里，MoS 通过静电吸附附着在 ZnCdS 纳米花上，形成了用于氢进化反应（HER）的 ZnCdS-MoS 复合光催化剂。在可见光照射下，ZCS-MoS-8 % 光催化剂的光催化氢进化率高达 42.07 mmol-h-g，是纯 ZnCdS 光催化剂的 5.8 倍（优于许多已报道的结果）。MoS 纳米晶极大地促进了光诱导电子向 ZnCdS 的转移，以实现质子还原，并促进了空穴的转移，以实现水的氧化。所构建的 ZnCdS-MoS 氢进化光催化剂显示出了良好的化学和经济价值。

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来源期刊

Materials Today Communications Materials Science-General Materials Science

CiteScore

5.20

自引率

5.30%

发文量

1783

审稿时长

51 days

期刊介绍： Materials Today Communications is a primary research journal covering all areas of materials science. The journal offers the materials community an innovative, efficient and flexible route for the publication of original research which has not found the right home on first submission.