Photocatalytic degradation of tetracycline from aqueous solution with graphene oxide and hydroxyapatite composites.

IF 3.8 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2025-07-17 DOI:10.1038/s41598-025-11502-z

Bilge Su Subasi, Tugba Hayri-Senel, Ebru Kahraman, Serhat Sezer, Gulhayat Nasun-Saygili, Nalan Erdol-Aydin

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Abstract

The increasing presence of antibiotics such as tetracycline (TC) in aquatic environments has become a critical issue due to their persistence and contribution to antibiotic resistance. In this study, a graphene oxide and hydroxyapatite (GO-HAp) composite was synthesized as photocatalyst, and its performance for visible-light-induced degradation of TC from aqueous solution was evaluated. The incorporation of GO reduced the band gap of HAp from 3.5 eV to 2.8 eV, thereby enhancing the photocatalytic efficiency. The evaluation and optimization of the process parameters including pH, initial TC concentration, and catalyst dosage were carried out using Box-Behnken Design (BBD). Under the optimum conditions (pH 11, 50 mg L^-1 TC, 15 mg catalyst), a degradation efficiency of 86.65% was obtained after 120 min of irradiation. Kinetic analysis showed that the degradation followed a pseudo-first-order model with an R² value of 0.95. Additionally, the photocatalyst synthesized in the study exhibited good reusability and showed an efficiency of 83% after three cycles. These results indicate that the GO-HAp composite is a promising and reusable material for the efficient photodegradation of tetracycline under visible light.

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氧化石墨烯和羟基磷灰石复合材料光催化降解四环素的研究。

四环素（四环素）等抗生素在水生环境中的存在越来越多，由于它们的持久性和对抗生素耐药性的贡献，已成为一个关键问题。本研究合成了氧化石墨烯-羟基磷灰石（GO-HAp）复合材料作为光催化剂，并对其可见光降解水溶液中TC的性能进行了评价。氧化石墨烯的掺入使HAp的带隙从3.5 eV减小到2.8 eV，从而提高了光催化效率。采用Box-Behnken设计（BBD）对pH、TC初始浓度、催化剂投加量等工艺参数进行评价和优化。在最佳条件（pH 11, 50 mg L-1 TC， 15 mg催化剂）下，辐照120 min，降解率为86.65%。动力学分析表明，降解符合拟一阶模型，R2值为0.95。此外，研究合成的光催化剂具有良好的可重复使用性，经过三次循环后效率达到83%。这些结果表明，GO-HAp复合材料是一种在可见光下高效光降解四环素的有前途的可重复使用材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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