Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
Environ Res. 2022 Dec;215(Pt 2):114270. doi: 10.1016/j.envres.2022.114270. Epub 2022 Sep 11.
Nowadays, antibiotic water pollution is an increasingly dangerous environmental threat. Thus, water treatment is essential for their reduction and removal. In recent decades, photocatalysts have attracted much attention due to their influential role in solving this issue. The photocatalytic process, which is one of the green processes and part of advanced oxidation processes, can be a good choice for treating contaminated water containing non-degradable organic matter. However, the design of high-performance photocatalysts under free sunlight can be challenging. In this study, g-CN-Ca, Mg codoped CoFeO-ZnO (gCN-CFO-ZnO) nanocomposite photocatalyst was applied in removing penicillin G (PENG) from drug effluents. Also, the effects of contaminant concentration, initial pH, irradiation time, and zinc oxide ratio in the nanocomposites were investigated. The hydrothermal method was carried out to prepare the appropriate composites. Then, the obtained products were characterized by powder X-Ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FT-IR), Raman, field-emission scanning and transmission electron microscope (FE-SEM&TEM), energy dispersive X-Ray (EDX), diffuse reflectance spectroscopy (DRS), vibrating sample magnetometer (VSM) and Photoluminescence (PL) techniques. According to the findings, the degradation of PENG in an acidic environment occurred remarkably; under the same conditions, with decreasing pH from 9 to 5 in the gCN-CFO-ZnO (33.33%) nanocomposite, the degradation efficiency grew from 47% to 74%. Also, the degradation rate of PENG in gCN-CFO-ZnO (16.66%) and gCN-CFO-ZnO (50%) nanocomposites under optimal conditions (pH = 5, PENG the concentration of 10 ppm, and irradiation time of 120 min) was achieved 52% and 60%, respectively. Further, gCN-CFO-ZnO (33.33%) nanocomposite showed higher efficiency in PENG degradation compared to the other two nanocomposites.
如今，抗生素水污染是一个日益危险的环境威胁。因此，水的处理对于减少和去除抗生素至关重要。近几十年来，由于在解决这一问题方面的重要作用，光催化剂引起了人们的广泛关注。光催化过程是绿色过程之一，也是高级氧化过程的一部分，是处理含有难降解有机物的受污染水的一个很好的选择。然而，在自由阳光下设计高性能光催化剂可能具有挑战性。在这项研究中，g-CN-Ca、Mg 共掺杂的 CoFeO-ZnO（gCN-CFO-ZnO）纳米复合材料光催化剂被应用于从药物废水中去除青霉素 G（PENG）。此外，还研究了污染物浓度、初始 pH 值、辐照时间和纳米复合材料中氧化锌比例的影响。采用水热法制备合适的复合材料。然后，通过粉末 X 射线衍射（PXRD）、傅里叶变换红外光谱（FT-IR）、拉曼、场发射扫描和透射电子显微镜（FE-SEM&TEM）、能谱（EDX）、漫反射光谱（DRS）、振动样品磁强计（VSM）和光致发光（PL）技术对所得产物进行了表征。结果表明，PENG 在酸性环境中的降解效果显著；在相同条件下，随着 gCN-CFO-ZnO（33.33%）纳米复合材料 pH 值从 9 降低到 5，降解效率从 47%提高到 74%。此外，在最佳条件下（pH=5、PENG 浓度为 10ppm、辐照时间为 120min），gCN-CFO-ZnO（16.66%）和 gCN-CFO-ZnO（50%）纳米复合材料中 PENG 的降解速率分别达到 52%和 60%。此外，gCN-CFO-ZnO（33.33%）纳米复合材料在 PENG 降解方面的效率高于其他两种纳米复合材料。
