Modification of AgInS2/g-C3N4 Z-Scheme Heterojunction by Ag Nanoparticles to Increase Photocatalytic Rate

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-04 DOI:10.1007/s10562-025-04975-0

Yang Bai, Zhongxiang Chen, Deng Gu, Ren Wang, Jianing He

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Abstract

The Surface Plasmon Resonance (SPR) effect and the construction of Z-scheme heterojunctions are critical for enhancing photocatalytic rates. Herein, a composite material composed of a Z-scheme heterojunction structure, AgInS₂/g-C₃N₄ (AIS/GCN), was developed and further optimized through the modification of Ag nanoparticles (Ag NPs). The SPR effect of Ag NPs significantly improved the electron transfer characteristics of GCN, leading to enhanced separation efficiency of electron-hole pairs. By leveraging the advantages of the Z-scheme heterojunction, the composite not only effectively enhanced charge carrier separation but also improved light absorption and increased the density of active catalytic sites. To evaluate the photocatalytic degradation efficiency of Rhodamine B (RhB) and the photoreduction efficiency of Cr (VI) using the Ag/AIS/GCN nanocomposite, a systematic characterization analysis was conducted. The results demonstrated that the degradation rate and photoreduction efficiency of the Ag NPs-modified AIS/GCN Z-scheme heterojunction composite were 5.30 times and 7.22 times higher than those of pure GCN, the TOC removal rate of the sample reached 56.19%. The incorporation of Ag NPs and AIS significantly enhanced light energy utilization efficiency, increased the number of surface-active sites, and improved charge carrier transport rates. This study illustrates that the combination of the SPR effect and Z-scheme heterojunction construction markedly enhances the efficiency and stability of the photocatalyst, indicating the broad potential applications of this composite in dye purification and heavy metal removal.

Graphical Abstract

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Ag纳米粒子修饰AgInS2/g-C3N4 Z-Scheme异质结提高光催化速率

表面等离子体共振（SPR）效应和z型异质结的构建是提高光催化速率的关键。本文通过对Ag纳米粒子（Ag NPs）的修饰，制备了一种由z型异质结结构组成的复合材料AgInS2/g-C3N4 （AIS/GCN）。Ag纳米粒子的SPR效应显著改善了GCN的电子转移特性，从而提高了电子-空穴对的分离效率。利用z型异质结的优势，复合材料不仅有效地增强了载流子分离，而且改善了光吸收，增加了活性催化位点的密度。为了评价Ag/AIS/GCN纳米复合材料光催化降解罗丹明B （RhB）的效率和光还原Cr （VI）的效率，进行了系统的表征分析。结果表明，Ag nps修饰的AIS/GCN z型异质结复合材料的降解率和光还原效率分别是纯GCN的5.30倍和7.22倍，样品的TOC去除率达到56.19%。Ag NPs和AIS的掺入显著提高了光能利用效率，增加了表面活性位点数量，提高了载流子输运率。该研究表明，SPR效应和z -图式异质结结构的结合显著提高了光催化剂的效率和稳定性，表明该复合材料在染料净化和重金属去除方面具有广阔的应用前景。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.