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II/Z型Bi2MoO6/Ag2O/Bi2O3异质结可见光催化降解四环素OA北大核心CSTPCD

II/Z-type Bi2MoO6/Ag2O/Bi2O3 Heterojunction for Photocatalytic Degradation of Tetracycline under Visible Light Irradiation

中文摘要英文摘要

构建异质结能够有效抑制光催化剂中光生电子和空穴的快速复合.本研究采用水热法、煅烧法以及溶剂热法合成了II/Z型Bi2MoO6/Ag2O/Bi2O3 异质结光催化剂,利用不同研究手段分析材料的组成、形貌以及光电化学性能.结果发现,复合材料的最佳组成为 25%ABOBM(Ag2O/Bi2O3 和 Bi2MoO6 的质量比为 1:4).在可见光照射下25%ABOBM对四环素(TC)的降解效率可达 85.6%,明显高于Ag2O/Bi2O3 和Bi2MoO6,而且三次循环实验后仍具有良好的稳定性.25%ABOBM 光催化性能的提高可归因于 Ag2O、Bi2O3 以及 Bi2MoO6 之间异质结的构建和特殊形貌的形成.自由基捕获实验和电子顺磁共振谱(EPR)结果表明,h+和·O2-在TC的降解过程中发挥着主要作用,而·OH和 1O2 发挥着次要作用.实验还探索了相关光催化机理,并利用液相色谱-质谱联用仪(LC-MS)对TC可能的降解路径进行了分析.本研究为双异质结光催化剂的制备及其在有机污染物降解应用方面提供了新的思路.

Construction of heterojunction can effectively suppress the swift recombination of photogenerated electrons and holes in photocatalyst.In this study,a II/Z-type Bi2MoO6/Ag2O/Bi2O3 heterojunction photocatalyst was synthesized using a solvothermal method combined with calcination.Various techniques were ultilized to examine the composition,morphology and photoelectrochemical properties of the as-prepared materials.The findings revealed that the optimal composition of the composite material was 25%ABOBM(with a mass ratio of Ag2O/Bi2O3 and Bi2MoO6 of 1:4).Under visible light irradiation,the degradation efficiency of tetracycline(TC)by 25%ABOBM reached 85.6%,which was significantly higher than that of Ag2O/Bi2O3 and Bi2MoO6,and maintained its good stability after three cycles of experiments.The enhanced photocatalytic performance of 25%ABOBM is attributed to the formation of heterojunctions and the unique morphologies among Ag2O,Bi2O3 and Bi2MoO6.Both h+ and ·O2-are significant contributors,while ·OH and 1O2 have secondary roles in the degradation process of TC,as indicated by free radical capture experiment and electron paramagnetic resonance spectroscopy(EPR).Furthermore,the related photocatalytic mechanisms were explored,and the potential degradation pathways of TC were analyzed using liquid chromatography-mass spectrometry(LC-MS).This study offers a novel approach to the preparation of photocatalysts with dual heterojunctions and demonstrates their application in the degrading organic pollutants.

叶茂森;王耀;许冰;王康康;张胜楠;冯建情

西安建筑科技大学 化学与化工学院,西安 710055西北有色金属研究院,西安 710016

化学

Bi2MoO6Ag2OBi2O3光催化降解四环素异质结

Bi2MoO6Ag2OBi2O3photocatalytic degradationtetracyclineheterojunction

《无机材料学报》 2024 (003)

321-329,中插5-中插8 / 13

陕西省重点研发计划(2023-YBGY-502);陕西省秦创原"科学家+工程师"团队建设项目(2023KXJ-185);西安市碑林区科技计划项目(GX2318);陕西省教育厅专项研究项目(18JK0443)Key R&D Plan of Shaanxi Province(2023-YBGY-502);QinChuangYuan"Scientist + Engineer"Team Construction Project of Shaanxi Province(2023KXJ-185);Science and Technology Plan Project of Beilin District in Xi'an(GX2318);Special research Project of Education Department of Shaanxi Province(18JK0443)

10.15541/jim20230408

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