Building hollow multi-shell structured Zn2MnO4/CdS S-scheme heterojunction for boosted photocatalytic H2 production

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Fangxuan Liu, Xiuyan Li, Bin Sun, Yanyan He, Tingting Gao, Guowei Zhou
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Abstract

Building an S-scheme heterojunction photocatalyst with a hollow multi-shell structure is regarded as of great significance to realize efficient H2 production. Herein, a hollow multi-shell structured Zn2MnO4/CdS S-scheme heterojunction photocatalyst was successfully constructed via a coordination polymer self-assembly strategy combined with non-uniform shrinkage effect and subsequent hydrothermal treatment. In the unique heterojunction system, the hollow multi-shell structure bestows significant merits upon the design of photocatalysts for boosted photocatalytic H2 production, including enhanced light capture ability, shortened photo-induced charge transfer distance, and provides abundant reactive sites. Simultaneously, the S-scheme mechanism not only promotes the separation and migration of photo-induced charge, but also additionally maintains the strong redox ability. As a result, Zn2MnO4/CdS heterojunction displays an unparalleled photocatalytic H2 production rate of 22.42 mmol g-1 h-1, almost 10.99 and 35.03 times that of pure Zn2MnO4 and CdS, respectively. Simultaneously, the heterojunction also demonstrates outstanding cycling stability, with no significant decline in photocatalytic H2 production activity after 10 cycles. Furthermore, the in-situ irradiated X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy further verify the S-scheme charge transfer pathway in Zn2MnO4/CdS heterojunction. Our study proposes an innovative viewpoint of hollow multi-shell structured S-scheme heterojunction photocatalyst for solar-driven H2 production.

Abstract Image

建立中空多壳结构Zn2MnO4/CdS S-scheme异质结促进光催化制氢
构建具有中空多壳结构的s型异质结光催化剂对实现高效产氢具有重要意义。本文采用配位聚合物自组装策略,结合非均匀收缩效应和后续水热处理,成功构建了一种中空多壳结构Zn2MnO4/CdS s型异质结光催化剂。在独特的异质结体系中,中空多壳结构为光催化制氢提供了显著的优点,包括增强光捕获能力,缩短光诱导电荷转移距离,提供丰富的反应位点。同时,S-scheme机制不仅促进了光诱导电荷的分离和迁移,还保持了较强的氧化还原能力。结果表明,Zn2MnO4/CdS异质结的光催化制氢速率为22.42 mmol g-1 h-1,分别是纯Zn2MnO4和CdS的10.99和35.03倍。同时,异质结也表现出了出色的循环稳定性,在10个循环后,其光催化制氢活性没有明显下降。此外,原位辐照x射线光电子能谱和电子顺磁共振能谱进一步验证了Zn2MnO4/CdS异质结中S-scheme电荷转移途径。我们的研究提出了一种用于太阳能驱动制氢的中空多壳结构s型异质结光催化剂的创新观点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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