亚甲蓝
光催化
化学
表皮葡萄球菌
核化学
结晶紫
寻常变形杆菌
生物膜
银纳米粒子
纳米颗粒
微生物学
抗菌剂
抗菌活性
细菌
纳米技术
生物
金黄色葡萄球菌
材料科学
有机化学
催化作用
遗传学
作者
Perumal Balaraman,Balamuralikrishnan Balasubramanian,Wenchao Li,Kaliannan Durairaj,D. Mahendran,Hesam Kamyab,Mamdooh Alwetaishi,Viji Maluventhen,Veeramuthu Ashokkumar,Shreeshivadasan Chelliapan,A. Maruthupandian
标识
DOI:10.1016/j.envres.2021.112278
摘要
Recently, the phyco-synthesis of nanoparticles has been applied as a reliable approach to modern research field, and it has yielded a wide spectrum of diverse uses in fields such as biological science and environmental science. This study used marine natural resource seaweed Sargassum myriocystum due to their unique phytochemicals and their significant attributes in giving effective response on various biomedical applications. The response is created by their stress-tolerant environmental adaptations. This inspired us to make an attempt using the above-mentioned charactersitics. Therfore, the current study performed phycosynthesis of titanium dioxide nanoparticles (TiO2-NPs) utilising aqueous extracts of S. myriocystum. The TiO2-NPs formation was confirmed in earlier UV–visible spectroscopy analysis. The crystalline structure, functional groups (phycomolecules), particle morphology (cubic, square, and spherical), size (∼50–90 nm), and surface charge (negative) of the TiO2-NPs were analysed and confirmed by various characterisation analyses. In addition, the seaweed-mediated TiO2-NPs was investigated, which showed potential impacts on antibacterial activity and anti-biofilm actions against pathogens (Staphylococcus aureus, S. epidermidis, Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa, and Klebsiella pneumoniae). Additionally, some evaluations were performed on larvicidal activities of TiO2-NPs in oppose to Aedes aegypti and Culex quinquefasciatus mosquitos and the environmental effects of photocatalytic activities against methylene blue and crystal violet under sunlight irradiation. The highest percent of methylene blue degradation was observed at 92.92% within 45 min. Overall, our findings suggested that S. myriocystum mediates TiO2-NPs to be a potent disruptive material for bacterial pathogens and mosquito larvae and also to enhance the photocatalytic dye degradation.
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