Huang Junzi, Lu Mengjie, Liu Min, Xie Yahong, Wei Peng, Xie Huihui, Li Liang, Han Weitao, Zhang Zhiwei, Qi Ying
Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering, Xinjiang University, Urumqi, 830017, PR China.
Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830017, PR China.
J Environ Manage. 2025 Apr;379:124893. doi: 10.1016/j.jenvman.2025.124893. Epub 2025 Mar 9.
The residues of tetracyclines (TCs) antibiotics present significant challenges in terms of contamination and pose a threat to human health. In this study, a cost-effective n-type semiconductor, CeO, were loaded with small amounts of Au nanoparticles were fabricated by one-step hydrothermal method under alkaline conditions in the presence of the surfactant CTAB. Characterization tests revealed that Au/CeO had significant visible light absorption capacity and good e/h separation efficiency. Photocatalytic degradation results of TC showed that 2% Au/CeO-CTAB had the highest photocatalytic activity, achieving a degradation rate of 86.4% within 90 min. These values were 3.8 and 2.6 times higher than those of pure CeO and CeO-CTAB (without Au loading), respectively. Loading Au nanoparticles substantially increased the visible light absorption range, reduced bandgap width, and lowered photo-generated carrier recombination rate. Residual e/h on the semiconductor surface activating functional groups, further promoting photocatalytic degradation of pollutants such as TC. Au-loaded CeO nano-photocatalysts have potential applications in the environments polluted by antibiotic residues.
四环素（TCs）类抗生素残留带来了严重的污染挑战，并对人类健康构成威胁。在本研究中，在表面活性剂CTAB存在的碱性条件下，通过一步水热法制备了负载少量金纳米颗粒的具有成本效益的n型半导体CeO。表征测试表明，Au/CeO具有显著的可见光吸收能力和良好的电子/空穴分离效率。TC的光催化降解结果表明，2% Au/CeO-CTAB具有最高的光催化活性，在90分钟内实现了86.4%的降解率。这些值分别比纯CeO和CeO-CTAB（未负载Au）高3.8倍和2.6倍。负载金纳米颗粒显著增加了可见光吸收范围，减小了带隙宽度，并降低了光生载流子复合率。半导体表面的残余电子/空穴激活官能团，进一步促进了TC等污染物的光催化降解。负载金的CeO纳米光催化剂在受抗生素残留污染的环境中具有潜在应用。
