Cage-like magnetic CdS/MgFe2O4 S-scheme heterojunction material for photocatalytic decomposition of tetracycline hydrochloride

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research Pub Date : 2024-04-02 DOI:10.1557/s43578-024-01331-7

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Abstract

The cage-like CdS/MgFe₂O₄ Step-scheme heterojunctions (S-scheme heterojunction) material was synthesized by loading CdS onto the surface of magnetic MgFe₂O₄. The crystal structure, morphology and properties of the catalyst were fully characterized, and the photocatalytic performance of the catalyst was investigated by photodegradation of tetracycline hydrochloride (TCH). The crystalline structure of CdS/MgFe₂O₄ is dominated by the cubic spinel structure of MgFe₂O₄ with a hollow cage morphology. CdS and MgFe₂O₄ form a tight-binding S-scheme heterostructure, which can accelerate the recombination of ineffective charge carriers and promote the separation of the effective charge carriers via the internal electric field, enabling CdS/MgFe₂O₄ to maintain an optimal redox potential. Compared with pure CdS and MgFe₂O₄, CdS/MgFe₂O₄ is more effective on degradation of TCH. Moreover, magnetic separation, recovery, and recycling of the composite catalyst can be achieved without secondary contamination by using the magnetic properties of the CdS/MgFe₂O₄.

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用于光催化分解盐酸四环素的笼状磁性 CdS/MgFe2O4 S 型异质结材料

摘要通过在磁性 MgFe2O4 表面负载 CdS，合成了笼状 CdS/MgFe2O4 阶梯异质结（S-scheme heterojunction）材料。通过对盐酸四环素（TCH）的光降解研究了催化剂的光催化性能。CdS/MgFe2O4 的晶体结构以 MgFe2O4 的立方尖晶石结构为主，具有空心笼状形态。CdS 和 MgFe2O4 形成了紧密结合的 S 型异质结构，可以加速无效电荷载流子的重组，并通过内部电场促进有效电荷载流子的分离，从而使 CdS/MgFe2O4 保持最佳氧化还原电位。与纯 CdS 和 MgFe2O4 相比，CdS/MgFe2O4 对 TCH 的降解更为有效。此外，利用 CdS/MgFe2O4 的磁性，可以实现复合催化剂的磁性分离、回收和循环利用，而不会造成二次污染。图表摘要

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来源期刊

Journal of Materials Research 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.70%

发文量

362

审稿时长

2.8 months

期刊介绍： Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory