Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, 1411713137, Tehran, Iran.
Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, Tehran, Iran.
J Environ Manage. 2020 Sep 15;270:110831. doi: 10.1016/j.jenvman.2020.110831. Epub 2020 Jun 5.
A simple biogenic approach for synthesis of FeO/Au nanocomposite with 31 nm size using aqueous extract of Carum carvi L. seeds has been reported. Phytochemicals of Carum carvi L. seeds extract play three roles, including reducing, capping, and stabilizing agents during the nanocomposite fabrication process. Resulting nanocomposite was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, differential reflectance spectroscopy, vibrating-sample magnetometer, energy-dispersive X-ray spectroscopy and X-ray elemental mapping. Differential reflectance spectroscopy investigated optical property and absorption spectra display a sharp absorption agreeing to a bandgap of 1.6 eV. Photocatalytic activity of biogenic FeO/Au nanocomposite has been investigated for degradation of imatinib and imipenem drugs under UV and visible light irradiation, due to pharmaceuticals have shown to be recalcitrant in wastewater and conventional wastewater treatments do not remove them, often. Degradation efficiency of imatinib, and imipenem are about 92% and 96% after 1200 s exposure UV light and about 82% and 84% after 3600s exposure visible light in the concentration of 10 ppm drugs. Also, antimicrobial activity of biogenic FeO/Au nanocomposite was investigated on three human pathogens and best result can see in 25 mg/mL of nanocomposite versuse Bacillus subtilis that inhibition zone is about 27 mm. Design of nanocomposites capable of simultaneously removing pharmaceutical and microbial contaminations is important in environments such as hospitals wastewater treatment.
采用水芹种子的水提物，通过一种简单的生物合成方法制备了粒径为 31nm 的 FeO/Au 纳米复合材料。水芹种子提取物中的植物化学物质在纳米复合材料的制备过程中起到了还原、稳定和包覆三种作用。通过 X 射线衍射、傅里叶变换红外光谱、差示反射光谱、振动样品磁强计、能谱和 X 射线元素映射对所得纳米复合材料进行了表征。差示反射光谱研究了其光学性质，吸收光谱显示出尖锐的吸收峰，对应于 1.6eV 的带隙。由于这些药物在废水中具有抗降解性，常规废水处理方法往往无法去除，因此研究了生物合成的 FeO/Au 纳米复合材料在紫外光和可见光照射下对伊马替尼和亚胺培南药物的光催化降解活性。在 10ppm 药物浓度下，暴露于紫外光 1200s 后，伊马替尼和亚胺培南的降解效率约为 92%和 96%，暴露于可见光 3600s 后，降解效率约为 82%和 84%。此外，还研究了生物合成的 FeO/Au 纳米复合材料对三种人体病原体的抗菌活性，在 25mg/mL 的纳米复合材料浓度下对枯草芽孢杆菌的抑制效果最好，抑菌圈约为 27mm。在医院废水处理等环境中，设计能够同时去除药物和微生物污染的纳米复合材料非常重要。
