Construction Hydroxyapatite on {101} and {001} Facets of TiO2 for Tetracycline and Bacterial Elimination

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2025-01-31 DOI:10.1007/s10562-025-04951-8

Wenjing Chen, Xinhao Sun, Bowen Sun, Wen Zhang, Yu Zhou, Qinxue Nie, Xian Che, Xiangang Lin, Yangyang Li, Yuanxu Liu

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Abstract

Environmental pollution and bacterial infections are serious problems that mankind has been facing. The simultaneous removal of pollutants and bacteria has attracted widespread attention. Herein, Hydroxyapatite (HAp)/TiO₂ photocatalysts were prepared with anatase TiO₂ exposing {101} and {001} facets as supports. HAp/TiO₂{101} exhibited excellent enhancement in photocatalytic degradation compared to HAp/TiO₂{001} and the pristine TiO₂ nanocrystals. The optimum HAp/TiO₂{101} photocatalyst displayed 77% degradation efficiency of tetracycline (TC) under 300 W xenon lamp within 60 min, as well as excellent stability and reproducibility. The inhibition rates for Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) are up to 98.3% and 97.2%, respectively. Moreover, it is biocompatible and has a remarkable therapeutic effect on wounds infected with S. aureus. The possible photocatalytic mechanism of HAp/TiO₂{101} was proposed and proved by EPR results. It has been demonstrated that ·O₂⁻, h⁺ as well as their corresponding reactive oxygen species (ROS) play a dominant role in the processes of TC degradation and antimicrobial actions. This work represents the first systematic exploration regarding the capability of HAp/TiO₂{101} which exhibits facet-dependent properties in the photocatalytic degradation, antimicrobial activities, as well as in the treatment of wound infections. It vividly demonstrates its prospective applications in the fields of environmental protection, life, and health.

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在TiO2的{101}和{001}表面构建羟基磷灰石以消除四环素和细菌

环境污染和细菌感染是人类面临的严重问题。污染物和细菌的同时去除引起了广泛的关注。本文以锐钛矿TiO2暴露{101}和{001}为载体制备了羟基磷灰石(HAp)/TiO2光催化剂。与HAp/TiO2{001}和原始TiO2纳米晶相比，HAp/TiO2{101}具有优异的光催化降解能力。最佳HAp/TiO2{101}光催化剂在300 W氙灯下60 min内对四环素（TC）的降解效率为77%，具有良好的稳定性和重复性。对金黄色葡萄球菌（S. aureus）和大肠杆菌（E. coli）的抑制率分别高达98.3%和97.2%。此外，它具有生物相容性，对金黄色葡萄球菌感染的伤口有显著的治疗效果。提出了HAp/TiO2{101}可能的光催化机理，并通过EPR结果进行了验证。研究表明，·O2−、h+及其对应的活性氧（ROS）在TC降解和抗菌过程中起主导作用。这项工作代表了关于HAp/TiO2{101}的能力的第一个系统探索，它在光催化降解、抗菌活性以及伤口感染的治疗中表现出依赖于表面的特性。生动地展示了其在环保、生命、健康等领域的应用前景。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.