ABSTRACT In the present work, photoactivity of Ba2In2O5 (BIO) is explored through degradation of aqueous persistent organic pollutants such as Norfloxacin (NF) in presence of natural solar irradiation, visible light as well as ultraviolet irradiation and in absence of a co-catalyst. To the best of our knowledge, this is the first report on degradation of persistent antibiotic NF by brownmillerite BIO. BIO is an inherent brownmillerite type oxide, synthesized through effective solution combustion method. The structural and morphological studies were performed using X-ray diffraction technique and scanning electron microscopy respectively. The effective optical bandgap (∼2.5 eV) opens up the possibility of BIO being used as a photoactive material. The ability of BIO to generate charge carriers and produce photocurrent (∼1.38 μ A/cm2) was explored using photoelectrochemical measurements. About 58% degradation of NF was achieved in 75 minutes (with a rate constant ∼ 0.012 min-1) and appreciable recyclability. Besides NF, the sample was also utilized for photodegradation of common water pollutants from textile industries, such as methylene blue.

中文翻译：

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用于光催化降解有机污染物的光活性褐锰矿 Ba2In2O5

摘要在目前的工作中，通过在自然太阳照射、可见光和紫外线照射下以及在没有助催化剂的情况下降解水性持久性有机污染物如诺氟沙星 (NF) 来探索 Ba2In2O5 (BIO) 的光活性。据我们所知，这是关于褐铁矿 BIO 降解持久性抗生素 NF 的第一份报告。BIO 是一种固有的褐铁矿型氧化物，通过有效的溶液燃烧方法合成。结构和形态研究分别使用 X 射线衍射技术和扫描电子显微镜进行。有效的光学带隙（~2.5 eV）开辟了将 BIO 用作光活性材料的可能性。BIO 产生电荷载流子和产生光电流的能力（~1. 38 μ A/cm2) 使用光电化学测量进行探索。在 75 分钟内实现了约 58% 的 NF 降解（速率常数约为 0.012 min-1）和可观的可回收性。除了 NF，样品还用于光降解纺织工业中常见的水污染物，如亚甲蓝。