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Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

机译:石墨烯/ siO2纳米复合材料:光催化和光催化剂的增强   石墨烯对siO2纳米粒子的生物医学活性

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摘要

The exceptional conducting nature of graphene makes it a viable candidate forenhancing the effectiveness of photocatalytic and biomedical nanomaterials.Herein, the immobilization of monodispersed silicon dioxide (SiO2)nanoparticles on multiple graphene layers is demonstrated for intercalation ofgraphene nanoplatelets (GNPs). Interestingly, the loading of graphenenanoplatelets with SiO2 nanoparticles enhances the photocatalytic efficiencyfrom 46% to 99%. For biomedical applications, it is found that 75% of Grampositive and 50% of Gram negative bacteria have been killed, hence bacterialproliferation is significantly restricted. Further, the cytotoxicity studyreveals that the synthesised nanocomposites are non-toxic for both normal(HCEC) and cancerous (MCF-7, HEp-2) cell lines which signifies their potentialas carriers for drug delivery. The prepared nanocomposites with controlledamount of carbon in the form of graphene can be employed for photocatalysisbased waste water remediation, biomedicine and nano drug delivery
机译:石墨烯的优异导电性能使其成为增强光催化和生物医学纳米材料有效性的可行候选者。在此,单分散二氧化硅(SiO2)纳米颗粒固定在多个石墨烯层上的研究表明,石墨烯可以嵌入石墨烯纳米片(GNP)。有趣的是,石墨烯纳米片中的SiO2纳米颗粒负载使光催化效率从46%提高到99%。对于生物医学应用,发现已经杀死了75%的革兰氏阳性菌和50%的革兰氏阴性菌,因此细菌增殖受到了明显的限制。此外,细胞毒性研究表明,合成的纳米复合材料对正常(HCEC)和癌性(MCF-7,HEp-2)细胞系均无毒,这表明它们具有潜在的药物递送载体的作用。制备的具有受控量的石墨烯形式的碳的纳米复合材料可用于基于光催化的废水修复,生物医学和纳米药物输送

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