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首页> 外文期刊>RSC Advances >Natural iron ore as a novel substrate for the biosynthesis of bioactive-stable ZnO@CuO@iron ore NCs: a magnetically recyclable and reusable superior nanocatalyst for the degradation of organic dyes, reduction of Cr(vi) and adsorption of crude oil aromatic compounds, including PAHs
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Natural iron ore as a novel substrate for the biosynthesis of bioactive-stable ZnO@CuO@iron ore NCs: a magnetically recyclable and reusable superior nanocatalyst for the degradation of organic dyes, reduction of Cr(vi) and adsorption of crude oil aromatic compounds, including PAHs

机译：天然铁矿石可作为生物活性稳定的ZnO @ CuO @铁矿石NCs的生物合成的新型底物：一种可磁循环使用和可重复使用的高级纳米催化剂，用于降解有机染料，还原Cr（vi）和吸附原油芳族化合物，包括多环芳烃

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For the first time, stable ZnO@CuO@iron ore nanocomposites (NCs) were green synthesized using magnetic iron ore as a natural substrate through an eco-friendly, simple and cost-effective method. The biosynthesized nanocatalyst was characterized using the SEM, EDS, elemental mapping, point analysis, XRD, FT-IR, polarized microscopy and UV-vis analytical techniques. The XRD and SEM methods confirmed the excellent stability of the nanocatalyst, even for 6 months. Also, the antioxidant ability of the green-synthesized NCs using a DPPH method was assessed per gallic acid and in contrast with ascorbic acid. Furthermore, their antibacterial activities against the common pathogenic bacteria of Pseudomonas aureus , Staphylococcus aureus and Escherichia coli were evaluated at different concentrations compared to chloramphenicol as a positive control. Moreover, the superior catalytic activity of the ZnO@CuO@iron ore NCs was investigated during a series of reactions, including the adsorption of polycyclic aromatic hydrocarbons (PAHs) of heavy crude oil (HCO) obtained from the Shaikhan oil field, the destruction of some organic dyes at room temperature, including methylene blue (MB) and methyl orange (MO), thymol blue (TB), bromothymol blue (BTB), phenol red (Ph.R), methyl red (MR), solochrome black T (SBT) and eriochrome black T (EBT) and finally the reduction of Cr( VI ) at ambient temperature using UV-vis spectroscopy. Finally, the magnetic NCs could be simply recovered and reused several times without considerable loss of catalytic activity.
机译：首次以磁性铁矿石为天然底物，通过一种生态友好，简单且经济高效的方法绿色合成了稳定的ZnO @ CuO @铁矿石纳米复合材料（NCs）。使用SEM，EDS，元素图谱，点分析，XRD，FT-IR，偏光显微镜和UV-vis分析技术对生物合成的纳米催化剂进行了表征。 XRD和SEM方法证实了纳米催化剂即使在6个月内也具有出色的稳定性。另外，对于每一种没食子酸和与抗坏血酸相比，使用DPPH方法评估了绿色合成NC的抗氧化能力。此外，与氯霉素作为阳性对照相比，在不同浓度下评估了它们对金黄色假单胞菌，金黄色葡萄球菌和大肠杆菌的常见致病菌的抗菌活性。此外，在一系列反应中，包括从Shaikhan油田获得的重质原油（HCO）的多环芳烃（PAHs）的吸附，室温下的一些有机染料，包括亚甲基蓝（MB）和甲基橙（MO），百里酚蓝（TB），溴百里酚蓝（BTB），苯酚红（Ph.R），甲基红（MR），单铬黑T（ SBT）和铬黑T（EBT），最后使用紫外-可见光谱在环境温度下还原Cr（VI）。最后，磁性NC可以简单地回收并重复使用几次，而不会显着降低催化活性。

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