Synergistic visible-light photocatalytic degradation of amoxicillin and ciprofloxacin using Ag/AgO-integrated 2D/2D g-C3N4/Ni3V2O8 S-scheme heterostructure

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2024-10-26 DOI:10.1016/j.mtsust.2024.101017

Akhila Amasegowda , Sneha Yadav , Ragesh Nath R , Udaya Kumar A. H , Sneha Narayan Kulkarni , Harikaranahalli Puttaiah Shivaraju , N.K. Lokanath

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Abstract

Employing a Step-scheme (S-scheme) configuration combined with a cocatalyst offers an effective approach to boost the photocatalytic efficiency of nano-heterostructures. In this study, Ag/AgO nanoparticles were integrated into a 2D/2D heterojunction (g-C₃N₄/Ni₃V₂O₈) for the photocatalytic degradation of amoxicillin and ciprofloxacin under visible light exposure. Various comprehensive investigative techniques were utilized to verify the composition, formation, and band structure of the g-C₃N₄/Ni₃V₂O₈–Ag/AgO heterostructure. The embedded Ag/AgO nanoparticles play a dual role: capturing carriers of charge and encouraging electron-hole separation, thus creating a heterojunction of the p-n S-scheme that improves the electrons and holes redox potential for surface reactions. The 2D/2D morphology enables substantial interfacial contact, while Ag/AgO nanoparticles act as cocatalysts, improving electron extraction, affecting product selectivity, and boosting catalytic activity. The optimized g-C₃N₄/Ni₃V₂O₈–Ag/AgO composite exhibits significant photocatalytic degradation of ciprofloxacin (CIP) and amoxicillin (AMX) under the influence of visible light, reaching elimination rates of 58.8% and 62.1% within 270 min, respectively. Additionally, •O₂⁻ and h⁺ are the primary active species, with •O₂⁻ leading the photocatalytic elimination of CIP and AMX. This study highlights a potential strategy to developing photocatalysts with a high elimination efficiency of antibiotics by harnessing the enhanced reducing and oxidizing capabilities of S-scheme heterojunctions through meticulous structural configuration.

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利用银/氧化银集成二维/二维 g-C3N4/Ni3V2O8 S 型异质结构在可见光下协同光催化降解阿莫西林和环丙沙星

将阶梯型结构（S-scheme）与共催化剂相结合，是提高纳米异质结构光催化效率的有效方法。在这项研究中，Ag/AgO 纳米粒子被集成到了 2D/2D 异质结（g-C3N4/Ni3V2O8）中，用于在可见光照射下光催化降解阿莫西林和环丙沙星。利用各种综合研究技术验证了 g-C3N4/Ni3V2O8-Ag/AgO 异质结构的组成、形成和能带结构。嵌入的 Ag/AgO 纳米粒子具有双重作用：捕获电荷载流子和促进电子-空穴分离，从而形成 p-n S 型异质结，提高电子和空穴的氧化还原电位，促进表面反应。2D/2D 形貌可实现大量的界面接触，而 Ag/AgO 纳米粒子则可作为协同催化剂，改善电子萃取，影响产物选择性，并提高催化活性。优化后的 g-C3N4/Ni3V2O8-Ag/AgO 复合材料在可见光的作用下，对环丙沙星（CIP）和阿莫西林（AMX）的光催化降解效果显著，在 270 分钟内消除率分别达到 58.8% 和 62.1%。此外，-O2- 和 h⁺ 是主要的活性物种，其中 -O2- 是光催化消除 CIP 和 AMX 的主要活性物种。这项研究强调了一种潜在的策略，即通过精心的结构配置，利用 S 型异质结增强的还原和氧化能力，开发出具有高抗生素消除效率的光催化剂。

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来源期刊

Materials Today Sustainability Multiple-

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.