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| 太阳光/NiFe-Bi-XY异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理 | |
| 引用本文： | 陈珂心, 王超, 胡清, 王宇寒. 太阳光/NiFe-Bi-XY异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理[J]. 环境工程学报, 2022, 16(8): 2510-2526. doi: 10.12030/j.cjee.202204023 |
| 作者姓名： | 陈珂心 王超 胡清 王宇寒 |
| 作者单位： | 1.南方科技大学环境科学与工程学院，深圳 518055; 2.南方科技大学工程技术创新中心（北京），北京 100083 |
| 基金项目： | 国家自然科学基金资助项目(51909119)；;国家重点研发计划项目(2019YFC1803900)； |
| 摘 要： |  近年来，尖晶石型铁氧体在光催化领域展现出良好的应用前景，但其团聚作用会影响催化效果，构建异质结结构可以有效提高催化效率。通过自组装法合成了一系列Bi2WO6/NiFe2O4 p-n型异质结催化剂(NiFe-Bi-XY)，并将其应用于去除水体中的四环素污染物。在太阳光/NiFe-Bi-73/过一硫酸盐(PMS)体系中，在反应30 min时对20 mg·L−1四环素溶液的去除率可以达到91.1%，矿化率可以达到56.3%，所构建的反应体系在碱性环境中依然保持着对四环素良好的去除效果。通过XPS价带谱、禁带宽度计算、Mott-Schottky和ESR测试证明NiFe-Bi-XY形成了p-n型异质结结构。在所构建的体系中，四环素的降解主要是通过光催化和非光催化降解2种途径共同实现的。淬灭实验结果表明，·O2−和1O2是降解四环素的主要活性物种。以上研究结果可为合成高效的二元异质结催化剂，并将其用于环境修复提供参考。 |
| 关 键 词： | 四环素 污水处理 光催化 过一硫酸盐 异质结结构 |
| 收稿时间： | 2022-04-04 |
Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system |
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| CHEN Kexin, WANG Chao, HU Qing, WANG Yuhan. Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system[J]. Chinese Journal of Environmental Engineering, 2022, 16(8): 2510-2526. doi: 10.12030/j.cjee.202204023 | |
| Authors: | CHEN Kexin WANG Chao HU Qing WANG Yuhan |
| Affiliation: | 1.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; 2.School of Environmental Science and Engineering, Engineering Technology Innovation Center (Beijing), Beijing 100083, China |
| Abstract: | In recent years, spinel-type ferrites have promising application prospects in the field of photocatalysis. However, its agglomeration will affect the catalytic effect, and the construction of a heterojunction structure can effectively improve the catalytic efficiency. In this study, a series of Bi2WO6/NiFe2O4 p-n type heterojunctions (NiFe-Bi-XY) by self-assemble were prepared and used to remove tetracycline in water. In the sunlight/NiFe-Bi-73/permonosulfate (PMS) systems, yhe optimal removal efficiency towards 20 mg·L−1 tetracycline could reach 91.1% at 30 min, and the mineralization rate was 56.3%. The constructed reaction system still maintained a good removal effect of tetracycline in an alkaline environment. For NiFe-Bi-XY, the formation of p-n type heterojunctions was proved by XPS valence band spectra, Kubelka-Munk plots, Mott-Schottky test and ESR measurements. In this system, the degradation of tetracycline was mainly achieved by photocatalytic and non-photocatalytic pathways. Radical trapping experiments confirmed that ·O2− and 1O2 radicals were the most critical active species during the catalytic process. This study provides a feasible approach to synthesize efficient binary heterojunction catalysts for environmental remediation. |
| Keywords: | tetracycline wastewater treatment photocatalysis peroxymonosulfate heterojunction |
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