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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：天然铁矿作为生物活性型ZnO @ CuO @ CuO @ Cuo @ Cuo @ Curo NCS的新型衬底：用于有机染料的降解的磁性可回收和可重复使用的优质纳米催化剂，Cr（VI）的减少和原油芳族化合物的吸附和吸附原油芳族化合物， 包括PAH

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摘要

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，稳定的ZnO @ @ CuO的铁矿石的纳米复合材料（NCS）是绿色的利用磁铁矿石通过一种环保型，简单且成本有效的方法天然底物合成的。使用SEM，EDS，元素映射，点分析，X射线衍射，FT-IR，偏光显微镜的生物合成的纳米催化剂进行了表征和UV-VIS分析技术。 XRD和SEM方法证实了纳米催化剂的稳定性极好，连服6个月。此外，使用DPPH方法的绿色合成的NC的抗氧化能力每没食子酸，并与抗坏血酸的对比度进行了评估。此外，它们对铜绿黄色葡萄球菌，金黄色葡萄球菌和大肠杆菌的常见致病菌的抗菌活性在不同浓度相比氯霉素作为阳性对照进行评价。而且，在ZnO @的CuO @铁矿石的NC的优良的催化活性的一系列反应的过程中进行了研究，包括来自Shaikhan油田得到多环芳香族烃的重质原油（HCO）的多环芳烃（PAHs）的吸附，破坏在室温下一些有机染料，包括亚甲基蓝（MB），甲基橙（MO），百里酚蓝（TB），溴百里酚蓝（BTB），酚红（Ph.R），甲基红（MR），依来铬黑T（ SBT）和铬黑T（EBT）和最后的Cr（VI）的在环境温度下使用紫外可见光谱的减少。最后，磁性纳米晶可以简单地恢复并没有催化活性的损失相当多次重复使用。

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