3D hollow microsphere Fe3O4@Bi0/OVs-Bi2O2CO3 composite photocatalyst with magnetic separation for photocatalytic degradation of aniline aeroflot in mineral processing wastewater

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.585

Yong Huang , Tao Ding , Mianping Zheng , Yiran Hu , Xuanyi Wu , Xiaofang Zhang

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Abstract

In this study, three-dimensional (3D) hollow Bi⁰/OVs-Bi₂O₂CO₃ was prepared by solvothermal method using carbon nanospheres (CSs) as a sacrificial template and N, N-dimethyl formamide (DMF) as a solvent, and then 3D Fe₃O₄@Bi⁰/OVs-Bi₂O₂CO₃ photocatalytic materials were obtained by co-precipitation method. The structure, morphology, optical properties and magnetic separation properties of the prepared photocatalysts were characterized. The results of magnetic separation experiments showed that the 3D Fe₃O₄@Bi⁰/OVs-Bi₂O₂CO₃ photocatalytic materials were easily dispersed in aqueous solution and could be separated by an applied magnetic field. Under Xenon lamp irradiation, the degradation rate of aniline aeroflot (AAF) over S3 sample reached 94.51 % in 120 min with a degradation rate constant of 0.0225 min⁻¹, which was 4.59 times higher than that of the reference sample. The enhanced photocatalytic performance of the 3D Fe₃O₄@Bi⁰/OVs-Bi₂O₂CO₃ photocatalytic material originates from the surface plasmon resonance (SPR) effect of Bi⁰ and the promotion of the photogenerated carrier transfer ability by Fe₃O₄ and oxygen vacancies (OVs), which suppresses the recombination of photogenerated electrons and holes. Based on experimental observations, a mechanism for the enhanced photocatalytic performance of 3D Fe₃O₄@Bi⁰/OVs-Bi₂O₂CO₃ photocatalytic materials was proposed.

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三维空心微球Fe3O4@Bi0/OVs-Bi2O2CO3复合光催化剂磁分离光催化降解选矿废水中的苯胺

本研究以碳纳米球（cs）为牺牲模板，以N， N-二甲基甲酰胺（DMF）为溶剂，采用溶剂热法制备三维（3D）空心Bi0/OVs-Bi2O2CO3，然后采用共沉淀法得到三维Fe3O4@Bi0/OVs-Bi2O2CO3光催化材料。对制备的光催化剂的结构、形貌、光学性能和磁分离性能进行了表征。磁分离实验结果表明，3D Fe3O4@Bi0/OVs-Bi2O2CO3光催化材料易于在水溶液中分散，并能在外加磁场作用下进行分离。在氙灯照射下，S3样品在120 min内对AAF的降解率达到94.51%，降解速率常数为0.0225 min−1，是参比样品的4.59倍。3D Fe3O4@Bi0/OVs- bi2o2co3光催化材料的光催化性能增强源于Bi0的表面等离子体共振（SPR）效应以及Fe3O4和氧空位（OVs）对光生载流子转移能力的促进，从而抑制了光生电子和空穴的复合。在实验观察的基础上，提出了三维Fe3O4@Bi0/OVs-Bi2O2CO3光催化材料增强光催化性能的机理。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.