The presence of the antibiotics in the wastewater has posed a huge risk to aquatic life and human health. It is a great significance to develop an effective technology to treat the antibiotics-containing wastewater. In this study, a series of g-C₃N₄/NH₂-MIL-88B(Fe) composite photocatalysts are synthesized through a simple one-step method. The structure and optical properties of prepared photocatalysts are detected by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectra (UV–Vis DRS), photoluminescence (PL) spectroscopy and transient photocurrent techniques, respectively. FESEM and TEM show that MOF is uniformly dispersed in petaloid g-C₃N₄. The uniform dispersion of Fe-MOFs in the heterojunction composites increases the specific surface area (SBET) of g-C₃N₄, which results in a great adsorption property for the nanocomposite. The capture experiment shows that •O2− and h+ are the main active substances in ciprofloxacin (CIP) degradation. These prepared composite photocatalysts exhibit excellent CIP photodegradation activity under visibly light irradiation with an apparent rate constant of 0.0127min−1 (3.74 times as the rate of single component). The remarkable catalytic performance can be ascribed to the fact that the g-C₃N₄/NH₂-MIL-88B(Fe) heterojunction inhibits the recombination of photoinduced electron–hole pairs and improved the visible light absorption.

中文翻译：

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新型g-C3N4/NH2-MIL-88B(Fe)复合光催化合成模拟太阳光下高效降解环丙沙星

废水中抗生素的存在对水生生物和人类健康构成了巨大风险。开发有效的含抗生素废水处理技术具有重要意义。在本研究中，一系列 gC ₃ N ₄ /NH ₂-MIL-88B(Fe)复合光催化剂通过简单的一步法合成。制备的光催化剂的结构和光学性质通过X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、紫外-可见吸收光谱（ UV-Vis DRS)、光致发光 (PL) 光谱和瞬态光电流技术。FESEM和TEM表明MOF均匀分散在花瓣状gC ₃ N ₄中。Fe-MOFs 在异质结复合材料中的均匀分散增加了比表面积（小号赌注)gC ₃ N ₄，这导致纳米复合材料的良好吸附性能。捕获实验表明•○2-和H+是环丙沙星（CIP）降解的主要活性物质。这些制备的复合光催化剂在可见光照射下表现出优异的CIP光降解活性，表观速率常数为0.0127分钟-1（单组分率的3.74倍）。显着的催化性能可归因于gC ₃ N ₄ /NH ₂ -MIL-88B(Fe)异质结抑制光致电子-空穴对的复合并改善可见光吸收。