缺陷工程调控ZnIn2S4纳米片用于增强近红外驱动制氢

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中文摘要：近红外(NIR)光驱动水分解产生氢气(H2)一直以来都是光催化领域备受关注的问题,但由于其动力学和热力学方面的缺陷,迄今为止仍是一项艰巨的挑战.为了突破这一限制,我们通过简便的水热法设计出了富含硫空位的无贵金属二维(2D)ZnIn2S4-基光催化剂,并首次使用单组分ZnIn2S4-基材料实现了波长大于800 nm的近红外驱动制氢性能.根据价带光谱、紫外-可见-近红外DRS光谱、稳态PL光谱、瞬态光电流响应和EPR表征,我们揭示了存在一个高效的Urbach带尾吸收用于捕获近红外光.硫空位在ZnIn2S4纳米片中的成功构建不仅扩展了光谱吸收范围,而且具有出色的载流子扩散特性和丰富的活性位点.因此,我们的研究结果可能会为未来开发近红外响应的ZnIn2S4-基光催化剂用于实现高效近红外驱动制氢提供一定的指导.

外文标题：Facile defect engineering in ZnIn2S4 nanosheets for enhanced NIR-driven H2 evolution

外文摘要：Near-infrared(NIR)light-driven water splitting to produce hydrogen(H2)has long been of great interest in photocatalysis,but it remains a formidable challenge so far due to both kinetic and thermodynamic shortcomings.To break through this limitation,we demonstrate a noble metal-free two-dimensional ZnIn2S4-based photocatalyst rich in sulfur vacancies via a facile hydrothermal method and firstly realized NIR-driven H2 production beyond 800 nm using single component ZnIn2S4-based materials.We disclosed the existence of an efficient Urbach tail transition to absorb long-wavelength NIR light according to the valence-band spectra,ultraviolet-visible-NIR diffuse reflectance spectra,steady-state photoluminescence spectra,transient photocurrent response,and electron paramagnetic resonance measurements.The successful construction of sulfur vacancies in ZnIn2S4 na-nosheets not only extends the spectral absorption range but also has an excellent carrier diffusion property as well as an abundance of active sites.Therefore,our findings may provide an effective and promising perspective for the future devel-opment of NIR-responsive ZnIn2S4-based photocatalysts for highly efficient H2 production.

外文关键词：

near-infraredH2 productionZnIn2S4sulfur va-canciesUrbach tail

作者：

黄元勇、杨洪、冯硕、马畅文、曹佩一、李菲菲、陆欣宇、施伟东

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作者单位：

College of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China

关键词：

near-infrared H2 production ZnIn2S4 sulfur va-cancies Urbach tail

基金：

National Natural Science Foundation of ChinaSino-German Cooperation Group ProjectJiangsu Province Innovation Support Program International Science and Technology Cooperation ProjectSpecial Scientific Research Project of School of Emergency Management,Jiangsu University

项目编号：

22225808GZ1579BZ2022045KY-A-02

出版年：

2024

DOI：

10.1007/s40843-024-2844-8

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(6)