The flower-like BiOCl/BiOBr with heterojunction prepared by co-precipitation method to enhance its photocatalytic performance

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Research Pub Date : 2024-03-15 DOI:10.1557/s43578-024-01324-6

Yeheng Zhang, Wensong Lin, Ran Gao, Huanxia Lin, Yong He

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Abstract

One-step co-precipitation method was used to prepare the flower-like BiOCl/BiOBr composite materials (BOBCs) with heterojunction structures, in which various amounts of BiOBr were used to adjust the band gap of BiOCl and thereby improve its photocatalytic activity. Based on photocatalytic performance experiments, BOBC2, in which the molar ratio of BiOCl to BiOBr is 1:0.75, exhibited the highest photodegradation efficiency (90.5%) to remove ofloxacin after 100 min illumination. The cyclic utilization performance of BOBC2 under the same conditions was tested by a cycle experiment. It was found that its photocatalytic activity remained at a high level after three cycles. The composition and microstructure of the material were analyzed by characterization techniques including XRD, FTIR, XPS, and SEM. The optical properties and the degradation process of the material were studied by DRS, PL, photocurrent, and active species trapping methods. The reasonable mechanism for photocatalytic degradation of ofloxacin was proposed.

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用共沉淀法制备的具有异质结的花状 BiOCl/BiOBr 可提高其光催化性能

采用一步共沉淀法制备了具有异质结结构的花状BiOCl/BiOBr复合材料（BOBCs），其中不同量的BiOBr可调节BiOCl的带隙，从而提高其光催化活性。根据光催化性能实验，BiOCl 与 BiOBr 摩尔比为 1:0.75 的 BOBC2 在光照 100 分钟后去除氧氟沙星的光降解效率最高（90.5%）。通过循环实验测试了 BOBC2 在相同条件下的循环利用性能。结果发现，经过三次循环后，其光催化活性仍保持在较高水平。通过 XRD、FTIR、XPS 和 SEM 等表征技术分析了材料的组成和微观结构。利用 DRS、PL、光电流和活性物种捕获方法研究了材料的光学特性和降解过程。提出了光催化降解氧氟沙星的合理机理。

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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