Preparation of Co3O4/BiOCl composite material for photocatalytic degradation of trinitrotoluene wastewater

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-11-13 DOI:10.1007/s42114-024-01056-5
Xiyang Zhou, Jiayi Liu, Jiaji Sun
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Abstract

The aim of this paper is to improve the photocatalytic ability of pure BiOCl by a composite approach to solve the problem of degradation of trinitrotoluene (TNT) wastewater, which is difficult to degrade. Co3O4/BiOCl composite photocatalysts were successfully and efficiently synthesized using a combination of hydrothermal and calcination methods. The Co3O4/BiOCl composites were characterized, tested, and investigated by various complex techniques. Then, the high photocatalytic performance of the material was determined by its efficiency in degrading simulated TNT wastewater under visible light. From the above data, the possible degradation mechanism of the material in the photocatalytic system was deduced. The experimental results showed that the composite of Co3O4 significantly enhanced the photocatalytic performance of BiOCl and improved the efficiency of the composites in degrading TNT wastewater under visible light. In particular, the 0.05CoBi composite exhibited optimal degradation performance, reaching a 92% degradation efficiency of the TNT wastewater within 3 h. The composite was also found to be highly efficient in the degradation of TNT wastewater. After three consecutive photocatalytic degradation cycles, the 0.05CoBi composite maintained 80% degradation efficiency. In addition, radical trapping experiments showed that O2 plays a major role, followed by h+, in the degradation of TNT wastewater by 0.05CoBi. From our experiments, we propose a photocatalytic mechanism for this material.

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制备用于光催化降解三硝基甲苯废水的 Co3O4/BiOCl 复合材料
本文旨在通过复合方法提高纯 BiOCl 的光催化能力,以解决难以降解的三硝基甲苯(TNT)废水的降解问题。采用水热法和煅烧法相结合的方法,成功高效地合成了 Co3O4/BiOCl 复合光催化剂。通过各种复合技术对 Co3O4/BiOCl 复合材料进行了表征、测试和研究。然后,通过其在可见光下降解模拟 TNT 废水的效率,确定了该材料的高光催化性能。根据上述数据,推导出了该材料在光催化体系中可能的降解机理。实验结果表明,Co3O4 的复合材料显著增强了 BiOCl 的光催化性能,提高了复合材料在可见光下降解 TNT 废水的效率。其中,0.05CoBi 复合材料表现出最佳的降解性能,在 3 小时内对 TNT 废水的降解效率达到 92%。经过连续三次光催化降解循环后,0.05CoBi 复合材料的降解效率保持在 80%。此外,自由基捕获实验表明,在 0.05CoBi 对 TNT 废水的降解过程中,O2- 起主要作用,其次是 h+。通过实验,我们提出了该材料的光催化机理。
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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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