Unlocking the photo-Fenton potential of novel magnetically separable sulfur doped g-C3N4/CoFe2O4 Z-scheme heterojunction systems towards tetracycline removal

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2024-08-15 DOI:10.1007/s10971-024-06509-3

Twinkle Garg, Movikiran, Nitansh, Simranjit Kaur, Bhupender Singh, Sonal Singhal

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引用次数: 0

Abstract

The increasing presence of antibiotics in water sources has become a major environmental concern. In this regard, designing of new photocatalysts possessing high visible light response and pertinent redox potentials are prerequisites. Herein, magnetically recoverable sulfur doped g-C₃N₄ (SCN)@CoFe₂O₄ (SCNCoFe) Z-scheme heterostructures were successfully fabricated by employing simple calcination route in which CoFe₂O₄ nanoparticles were allowed to grow over SCN nanosheets. The prepared heterostructures displayed highly efficient photocatalytic removal of tetracyclines i.e., tetracycline (TC) and minocycline (MC), SCNCoFe-20 showed the highest degradation efficiency, with around 94% for both TC and MC within 120 s of visible light irradiation. The mineralization efficacy analysis using total organic carbon removal % validated the practicality of proposed method towards removal of TC and MC from aquatic environment. Photoluminescence and radical quenching studies revealed the enhancement in H₂O₂ assisted photocatalytic degradation of TC and MC via Z-scheme charge transport, which comprehends the substantial synergy effect between photocatalysis and Fenton mechanism. Overall, this work provides a new insight into development of Z-scheme based heterostructures for antibiotics elimination from wastewater.

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挖掘新型磁性可分离掺硫 g-C3N4/CoFe2O4 Z 型异质结系统在去除四环素方面的光-芬顿潜力

摘要水源中抗生素的日益增多已成为一个主要的环境问题。为此，设计具有高可见光响应和相关氧化还原电位的新型光催化剂是先决条件。本文采用简单的煅烧路线，让 CoFe2O4 纳米颗粒在 SCN 纳米片上生长，成功制备了磁性可回收的掺硫 g-C3N4 (SCN)@CoFe2O4 (SCNCoFe) Z 型异质结构。所制备的异质结构可高效光催化去除四环素类药物，即四环素（TC）和米诺环素（MC），其中 SCNCoFe-20 的降解效率最高，在可见光照射 120 秒内对四环素和米诺环素的降解效率均达到 94%左右。利用总有机碳去除率进行的矿化效力分析验证了所提方法在去除水生环境中的 TC 和 MC 方面的实用性。光致发光和自由基淬灭研究表明，H2O2 通过 Z 型电荷传输增强了对 TC 和 MC 的光催化降解能力，从而理解了光催化和 Fenton 机制之间的实质性协同效应。总之，这项工作为开发基于 Z-梯度的异质结构以消除废水中的抗生素提供了新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.