Bimetallic AgNi co-catalyst modified g-C3N4 nanosheets for highly efficient photocatalytic hydrogen evolution

IF 7.9 3区 材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Li-Juan Sun, Yan-Ming Jia, Fu Yang, Zhi-Yan Bai, Yu-Long Xie
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引用次数: 0

Abstract

In this study, AgNi/g-C3N4 (AgNi/CN) composite were prepared by chemical reduction method to investigate their performance in photocatalytic water separation for hydrogen production. The research demonstrates that the bimetallic AgNi system exhibits mutual synergy, significantly enhancing the photocatalytic hydrogen evolution performance in aqueous solutions. Among them, the AgNi/g-C3N4 photocatalyst can broaden the light absorption range, enable faster charge transfer and transport, and effectively inhibit the fast photogenerated electron-hole complexation. Notably, the hydrogen production rate of 5 % AgNi/CN sample was as high as 20891.14 μmol g−1 h−1. Characterization techniques showed that this composite had enhanced light harvesting ability as well as efficient photogenerated charge carrier separation. In addition, density-functional theory (DFT) simulations show that the AgNi/CN system has an optimal reaction energy barrier, while also elucidating potential charge transfer pathways in the photocatalytic process. These findings highlight the promising applications of bimetallic co-catalysts and provide new strategies for designing high-performance photocatalytic systems.
双金属AgNi共催化剂修饰的g-C3N4纳米片用于高效光催化析氢
本研究采用化学还原法制备AgNi/g-C3N4 (AgNi/CN)复合材料,考察其光催化水分离制氢的性能。研究表明,双金属AgNi体系表现出相互协同作用,显著提高了水溶液中光催化析氢性能。其中,AgNi/g-C3N4光催化剂可以拓宽光吸收范围,实现更快的电荷转移和输运,有效抑制快速光生电子-空穴络合。值得注意的是,5% AgNi/CN样品的产氢率高达20891.14 μmol g−1 h−1。表征技术表明,该复合材料具有增强的光捕获能力和高效的光生电荷载流子分离。此外,密度泛函理论(DFT)模拟表明AgNi/CN体系具有最佳反应能垒,同时也阐明了光催化过程中潜在的电荷转移途径。这些发现突出了双金属共催化剂的应用前景,并为设计高性能光催化系统提供了新的策略。
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来源期刊
CiteScore
5.80
自引率
6.40%
发文量
174
审稿时长
32 days
期刊介绍: Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.
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