Tongming Su, Zichun Chen, Xuan Luo, Xinling Xie, Zuzeng Qin, Hongbing Ji
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引用次数: 0
Abstract
Tetracycline (TC) is not only a threat to aquatic ecosystems and the health of organisms but also a crucial contributor to the drug resistance of bacteria. The photodegradation of TC is an effective strategy for overcoming antibiotic pollution in the water environment. Fe–In2O3/In2S3 composites were successfully synthesized via a hydrothermal method for the photocatalytic degradation of TC under visible light illumination. When the Fe doping content was 2%, the degradation rate of TC by the 2% Fe–In2O3/In2S3 composite under visible light irradiation reached 92.4%, which was higher than that of 41.5% for In2O3/In2S3, 86.7% for 1% Fe–In2O3/In2S3 and 79% for 3% Fe–In2O3/In2S3. The photodegradation of tetracycline on Fe–In2O3/In2S3 was a first-order reaction under visible light. The rate constant of photocatalytic tetracycline degradation was 5.12 × 10–3 min–1, which was 4.1 times greater than the rate constant of In2O3/In2S3. The characterization results revealed the excellent separation efficiency of the 2% Fe–In2O3/In2S3 composites for photogenerated electron–hole pairs, which increased the photodegradation efficiency. Furthermore, under the most suitable reaction conditions, the photodegradation rate of tetracycline was 92.4%. A mechanistic study revealed that the doping of Fe ions effectively improved the transfer efficiency of photoproduced charges and inhibited the combination of photoproduced electron–hole pairs, thereby improving the photocatalytic performance of the material and achieving efficient oxidative degradation of tetracycline.
期刊介绍:
The Journal of Chemical Health and Safety focuses on news, information, and ideas relating to issues and advances in chemical health and safety. The Journal of Chemical Health and Safety covers up-to-the minute, in-depth views of safety issues ranging from OSHA and EPA regulations to the safe handling of hazardous waste, from the latest innovations in effective chemical hygiene practices to the courts'' most recent rulings on safety-related lawsuits. The Journal of Chemical Health and Safety presents real-world information that health, safety and environmental professionals and others responsible for the safety of their workplaces can put to use right away, identifying potential and developing safety concerns before they do real harm.