利用红色光谱区的 Wurtzite InP 量子点的尺寸依赖性光催化作用

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-11-19 DOI:10.1021/acsenergylett.4c02526

David Stone, Shira Gigi, Tom Naor, Xiang Li, Uri Banin

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引用次数: 0

摘要

光催化制氢为生成太阳能燃料提供了一种可持续的方法。磷化铟（InP）纳米晶体量子点（QDs）具有可调节的带隙和多功能的表面特性，是重金属基半导体 NCs 光催化剂的环保型替代品。我们报告了沃特兹InP（w-InP）QDs的合成及其作为光催化剂利用太阳光谱红色部分从水中制氢的性能。通过阳离子交换路线合成了尺寸可控的 w-InP QDs，其吸收边缘延伸至 750 纳米。与其他窄带隙 QD 相比，这些 QD 在水中用硫化物稳定后，显示出更高的制氢效率。总体制氢效率随尺寸的增大而急剧下降。将小尺寸 QDs 的高效率与大尺寸 QDs 的宽吸收范围相结合的混合尺寸方法能更有效地利用太阳光谱，从而提高太阳能到氢气的转化率。这种方法有望实现有效的太阳能燃料发电。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Size-Dependent Photocatalysis by Wurtzite InP Quantum Dots Utilizing the Red Spectral Region

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Size-Dependent Photocatalysis by Wurtzite InP Quantum Dots Utilizing the Red Spectral Region

Photocatalytic hydrogen generation offers a sustainable method for generating solar fuels. Indium phosphide (InP) nanocrystal quantum dots (QDs), with their adjustable band gaps and versatile surface properties, present an eco-friendly alternative to heavy-metal-based semiconductor NCs as photocatalysts. We report the synthesis of wurtzite InP (w-InP) QDs and their performance as photocatalysts for hydrogen generation from water by using the red part of the solar spectrum. Size-controlled w-InP QDs with absorption edges extending to 750 nm were synthesized via a cation exchange route. Stabilized in water with sulfides, these QDs demonstrated higher hydrogen generation efficiencies compared with other narrow-band-gap QDs. The overall hydrogen generation efficiency sharply decreases with the size. A mixed-size approach combining the high efficiency of small QDs with the broad absorption range of large QDs enhances the solar-to-hydrogen conversion by a more effective utilization of the solar spectrum. Such an approach shows promise for effective solar fuel generation.

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.