Insight into the role of nickel carbide nanoparticles in improving photocatalytic H2 generation over ZnIn2S4 under visible light

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2024-07-14 DOI:10.1016/j.flatc.2024.100711

Longfei Wang , Qingru Zeng , Yufeng Gan , Yuezhou Wei , Xinpeng Wang , Deqian Zeng

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Abstract

Zinc indium sulfide (ZnIn₂S₄) is a Cd-free semiconductor with great potential in various photocatalytic applications. However, its rapid photogenerated charge combination poses some challenges. Constructing ZnIn₂S₄-based heterojunction photocatalysts to address this has proven an effective solution. In this study, we loaded uniform Ni₃C nanoparticles as cocatalysts on layered ZnIn₂S₄ nanostructures to promote photocatalytic H₂ production activity. The optimal 3 % Ni₃C/ZnIn₂S₄ exhibited the highest H₂ generation rate of 393 μmol·g⁻¹·h⁻¹, 4.5 times greater than pure ZnIn₂S₄. The enhanced photocatalytic performance was ascribed to the incorporation of metallic Ni₃C, which provides more catalytically active sites and establishes electron transfer channels at the interfaces, facilitating the photogenerated carrier separation and H₂ production. The photocatalytic mechanism of Ni₃C/ZnIn₂S₄ was proposed through experimental measurements and DFT calculations. This study offers a way to develop efficient ZnIn₂S₄-based visible-light-driven photocatalysts.

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洞察碳化镍纳米颗粒在可见光条件下改善 ZnIn2S4 光催化产生 H2 的作用

硫化锌铟（ZnIn2S4）是一种无镉半导体，在各种光催化应用中具有巨大潜力。然而，其快速的光生电荷结合带来了一些挑战。事实证明，构建基于 ZnIn2S4 的异质结光催化剂是解决这一问题的有效方法。在本研究中，我们在层状 ZnIn2S4 纳米结构上负载了均匀的 Ni3C 纳米颗粒作为协同催化剂，以提高光催化产生 H2 的活性。最佳的 3 % Ni3C/ZnIn2S4 的 H2 生成率高达 393 μmol-g-1-h-1，是纯 ZnIn2S4 的 4.5 倍。光催化性能的提高归因于金属 Ni3C 的加入，它提供了更多的催化活性位点，并在界面上建立了电子传递通道，促进了光生载流子的分离和 H2 的产生。通过实验测量和 DFT 计算，提出了 Ni3C/ZnIn2S4 的光催化机理。这项研究为开发基于 ZnIn2S4 的高效可见光驱动光催化剂提供了一条途径。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)