In Situ Photodeposition of Au Nanoparticle Plasma: Enhanced Defect-State g-C3N4 Photocatalytic Hydrogen Evolution

IF 3.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Crystal Growth & Design Pub Date : 2024-06-17 DOI:10.1021/acs.cgd.4c00584

Yahao Zhao, Wen Liu, Peng Liu, Qian Fu, Difu Zhan, Furong Ye, Zhengwang Cheng, Jiayi Tian, Yizhong Huang and Changcun Han*,

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Abstract

To further enhance the hydrogen evolution activity of g-C₃N₄, Au nanoparticle (NP)-modified defective-state g-C₃N₄ nanosheet photocatalysts (Au/HCN) were successfully prepared through in situ photodeposition in this study. The prepared Au/HCN exhibited an excellent photocatalytic hydrogen evolution activity. Under full spectrum, the hydrogen production rate of Au/HCN (7289 μmol·g^–1·h^–1) was 1.6 times higher than that of Au NPs-modified pure g-C₃N₄ nanosheets (Au/CN) (4437 μmol·g^–1·h^–1) and 4.3 times higher than that of Au NPs-modified bulk g-C₃N₄ (Au/BCN) (1664 μmol·g^–1·h^–1). The photoluminescence and steady-state photovoltage spectra indicate that Au/HCN has the highest ability for photogenerated charge separation and photogenerated electron transfer efficiency. The ultraviolet–visible spectrophotometer (DRS) spectra revealed an additional light absorption peak at 520 nm for Au/HCN. The above results indicate that the defects can effectively inhibit the recombination of photogenerated charges from HCN. In addition, the synergistic interaction between Au NPs and HCN, as well as the surface plasmon resonance effect of Au NPs, promoted photocatalytic hydrogen evolution.

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金纳米粒子等离子体的原位光沉积：增强型缺陷态 g-C3N4 光催化氢气吸收

为了进一步提高 g-C3N4 的氢气催化活性，本研究通过原位光沉积成功制备了金纳米粒子（NP）修饰的缺陷态 g-C3N4 纳米片光催化剂（Au/HCN）。制备的 Au/HCN 具有优异的光催化氢气进化活性。在全光谱条件下，Au/HCN的产氢率（7289 μmol-g-1-h-1）是Au NPs修饰纯g-C3N4纳米片（Au/CN）（4437 μmol-g-1-h-1）的1.6倍，是Au NPs修饰块状g-C3N4（Au/BCN）（1664 μmol-g-1-h-1）的4.3倍。光致发光和稳态光电压光谱表明，Au/HCN 的光生电荷分离能力和光生电子转移效率最高。紫外-可见分光光度计（DRS）光谱显示，Au/HCN 在 520 纳米处有一个额外的光吸收峰。上述结果表明，缺陷能有效抑制 HCN 光生电荷的重组。此外，Au NPs 与 HCN 之间的协同作用以及 Au NPs 的表面等离子体共振效应促进了光催化氢气进化。

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.