Multidisciplinary Research Institute for Science and Technology, IIMCT, University of La Serena, 1015, Juan Cisternas St., La Serena, Chile; Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile.
CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences Qingdao PR China, Qingdao, China.
Chemosphere. 2021 Oct;280:130803. doi: 10.1016/j.chemosphere.2021.130803. Epub 2021 May 5.
Tetracycline (TC) is one of the most commonly used broad-spectrum antibiotics to treat the bacterial infection. TC antibiotics enter into the environment because of partial metabolism in the humans and animals, thereby increasing the environmental toxicity. Therefore, it is highly needed to treat TC antibiotics from the water system. In this aspect, the present work focus on the synthesis of Fe and Zn (bimetal) incorporated with different concentrations into the bismuth-oxy-iodide (Fe/Zn-BiOI) based photocatalyst materials. The synthesized Fe/Zn-BiOI was tested against photocatalytic degradation of TC antibiotics and bacteria. The band gap value of the synthesized Fe/Zn-BiOI was calculated 2.19 eV. The incorporation of the Fe and Zn metals within the BiOI aided advantages that increased the reactive sites, oxygen defects, photon adsorption, production of hydroxyl radicals, and decrease the recombination rate, thereby high photo-degradation ability. The maximum degradation of ~83% was observed using Fe/Zn-BiOI-1-1 at 10 mg/L of TC antibiotics concentration. Moreover, ~98% of degradation was observed at pH10 of the TC antibiotics. The photo-activity against bacteria of the Fe/Zn-BiOI was also determined. The data suggested that the synthesized Fe/Zn-BiOI based photocatalyst materials effectively inhibited the bacterial strains. Therefore, Fe/Zn-BiOI based photocatalyst materials might be promising materials that effectively degrade TC antibiotics as well as bacteria.
四环素（TC）是一种最常被用于治疗细菌感染的广谱抗生素。由于人类和动物体内的部分代谢，TC 抗生素进入环境，从而增加了环境毒性。因此，从水系中处理 TC 抗生素是非常必要的。在这方面，本工作重点合成了不同浓度的铁和锌（双金属）掺入到铋氧碘化物（Fe/Zn-BiOI）基光催化剂材料中。所合成的 Fe/Zn-BiOI 被用于测试 TC 抗生素和细菌的光催化降解。所合成的 Fe/Zn-BiOI 的能带隙值计算约为 2.19 eV。Fe 和 Zn 金属在 BiOI 中的掺入有助于增加反应位点、氧缺陷、光子吸收、羟基自由基的产生和减少复合率，从而具有较高的光降解能力。在 TC 抗生素浓度为 10 mg/L 时，使用 Fe/Zn-BiOI-1-1 观察到最大降解率约为 83%。此外，在 TC 抗生素的 pH 值约为 10 时，观察到约 98%的降解。还测定了 Fe/Zn-BiOI 对细菌的光活性。数据表明，所合成的基于 Fe/Zn-BiOI 的光催化剂材料有效地抑制了细菌菌株。因此，基于 Fe/Zn-BiOI 的光催化剂材料可能是有效降解 TC 抗生素和细菌的有前途的材料。
