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In situ synthesis of a Bi2O3 quantum dot decorated BiOCl heterojunction with superior photocatalytic capability for organic dye and antibiotic removal
RSC Advances ( IF 3.9 ) Pub Date : 2023-02-14 , DOI: 10.1039/d2ra07726d Mingliang Zhang 1, 2 , Fangfang Duo 2 , Jihong Lan 2 , Jianwei Zhou 2 , Liangliang Chu 2 , Chubei Wang 2 , Lixiang Li 1, 3
RSC Advances ( IF 3.9 ) Pub Date : 2023-02-14 , DOI: 10.1039/d2ra07726d Mingliang Zhang 1, 2 , Fangfang Duo 2 , Jihong Lan 2 , Jianwei Zhou 2 , Liangliang Chu 2 , Chubei Wang 2 , Lixiang Li 1, 3
Affiliation
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As a decoration method, coupling a photocatalyst with semiconductor quantum dots has been proven to be an efficient strategy for enhanced photocatalytic performance. Herein, a novel BiOCl nanosheet decorated with Bi2O3 quantum dots (QDs) was first synthesized by a facile one-step in situ chemical deposition method at room temperature. The as-prepared materials were characterized by multiple means of analysis. The Bi2O3QDs with an average diameter of about 8.0 nm were uniformly embedded on the surface of BiOCl nanosheets. The obtained Bi2O3QDs/BiOCl exhibited significantly enhanced photocatalytic performance on the degradation of the rhodamine B and ciprofloxacin, which could be attributed to the band alignment, the photosensitization effect and the strong coupling between Bi2O3 and BiOCl. In addition, the dye photosensitization effect was demonstrated by the monochromatic photodegradation experiments. The radical trapping experiments and the ESR testing demonstrated the type II charge transfer route of the heterojunction. Finally, a reasonable photocatalytic mechanism based on the relative band positions was discussed to illustrate the photoreaction process. These findings provide a good choice for the design and potential application of BiOCl-based photocatalysts in water remediation.
中文翻译：
原位合成 Bi2O3 量子点修饰的 BiOCl 异质结，具有优异的光催化能力，可去除有机染料和抗生素
作为一种装饰方法，将光催化剂与半导体量子点耦合已被证明是提高光催化性能的有效策略。在此，首先在室温下通过简单的一步原位化学沉积法合成了一种装饰有 Bi 2 O 3量子点 (QD) 的新型 BiOCl 纳米片。所制备的材料通过多种分析手段进行表征。平均直径约为8.0 nm的Bi 2 O 3量子点均匀地嵌入BiOCl纳米片表面。得到的Bi 2 O 3QDs/BiOCl 对罗丹明 B 和环丙沙星的降解表现出显着增强的光催化性能，这可归因于带排列、光敏效应以及 Bi 2 O 3 和 BiOCl 之间的强耦合。此外，通过单色光降解实验证明了染料的光敏作用。自由基捕获实验和ESR测试证明了异质结的II型电荷转移途径。最后，讨论了基于相对带位置的合理光催化机制，以说明光反应过程。这些发现为基于BiOCl的光催化剂在水体修复中的设计和潜在应用提供了一个很好的选择。
更新日期：2023-02-14
中文翻译：
原位合成 Bi2O3 量子点修饰的 BiOCl 异质结，具有优异的光催化能力，可去除有机染料和抗生素
作为一种装饰方法，将光催化剂与半导体量子点耦合已被证明是提高光催化性能的有效策略。在此，首先在室温下通过简单的一步原位化学沉积法合成了一种装饰有 Bi 2 O 3量子点 (QD) 的新型 BiOCl 纳米片。所制备的材料通过多种分析手段进行表征。平均直径约为8.0 nm的Bi 2 O 3量子点均匀地嵌入BiOCl纳米片表面。得到的Bi 2 O 3QDs/BiOCl 对罗丹明 B 和环丙沙星的降解表现出显着增强的光催化性能，这可归因于带排列、光敏效应以及 Bi 2 O 3 和 BiOCl 之间的强耦合。此外，通过单色光降解实验证明了染料的光敏作用。自由基捕获实验和ESR测试证明了异质结的II型电荷转移途径。最后，讨论了基于相对带位置的合理光催化机制，以说明光反应过程。这些发现为基于BiOCl的光催化剂在水体修复中的设计和潜在应用提供了一个很好的选择。
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