马齿苋功能化银纳米复合材料光催化降解活性纺织染料的研究及其抗菌和抗糖尿病潜力的探索,Journal of Alloys and Compounds

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马齿苋功能化银纳米复合材料光催化降解活性纺织染料的研究及其抗菌和抗糖尿病潜力的探索
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jallcom.2020.155083
Ganesh Dattatraya Saratale , Rijuta Ganesh Saratale , Si-Kyung Cho , Gajanan Ghodake , Ram Naresh Bharagava , Yooheon Park , Sikandar I. Mulla , Dong-Su Kim , Avinash Kadam , Supriya Nair , Han-Seung Shin

摘要本研究利用马齿苋叶 (PNL) 水提取物作为还原剂研究了一锅绿色可持续银纳米粒子 (AgNPs) 合成。通过使用许多标准分析技术研究了生产的 AgNPs 的物理和化学特性。分析结果表明 PNL-AgNPs 本质上是结晶的，用 PNL 植物化学物质制造，形状为圆形，尺寸约为 20 nm。生物合成的 PNL-AgNPs 表现出显着的光催化活性，无需任何还原剂即可降解各种活性纺织染料。特别是，在活性纺织染料中，PNL-AgNPs 对活性绿 19A (RG19A) 表现出更高的光催化降解，其中通过测量化学需氧量 (COD; 84%) 和总有机碳 (TOC; 75%) 在孵育 60 分钟内。系统地研究了各种影响操作因素，如温度、pH 值、光照条件、光催化剂用量和染料浓度对 RG19A 光催化降解的影响。PNL-AgNPs 的催化活性在三个重复周期内保持稳定，这极大地提高了 PNL-AgNPs 在纺织废水处理中的实际适用性。PNL-AgNPs 显示出显着的抗菌活性和协同作用，与商业抗生素对抗人类病原菌。基于细菌细胞膜破坏和细胞质内容物泄漏确定抗菌活性的机制。PNL-AgNPs 可能限制 α-葡萄糖苷酶和 α-淀粉酶的活性，它们是糖尿病的标记酶。

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Investigation of photocatalytic degradation of reactive textile dyes by Portulaca oleracea-functionalized silver nanocomposites and exploration of their antibacterial and antidiabetic potentials

Abstract This study investigated a one-pot green and sustainable silver nanoparticles (AgNPs) synthesis by utilizing Portulaca oleracea leaves (PNL) aqueous extract as a reducing agent. The physical and chemical characteristics of the produced AgNPs were studied by employing numerous standard analytical techniques. The analytical outcomes suggest that PNL-AgNPs were crystalline in nature, fabricated with PNL phytochemicals, and circular in shape measuring ∼20 nm in size. Biosynthesized PNL-AgNPs exhibited a significant photocatalytic activity for degrading various reactive textile dyes without the need of any reducing agent. Particularly, of the reactive textile dyes, PNL-AgNPs exhibited higher photocatalytic degradation of Reactive Green 19A (RG19A), wherein its deterioration was studied by measuring the reduction in chemical oxygen demand (COD; 84%) and total organic carbon (TOC; 75%) within 60 min of incubation. The effects of various influencing operational factors, such as temperature, pH, light condition, photocatalyst amount, and dye concentrations, on the photocatalytic degradation of RG19A were systematically examined. The catalytic activity of PNL-AgNPs remains stable up to three repeated cycles, which upsurges the real-world applicability of PNL-AgNPs in textile wastewater treatment. PNL-AgNPs showed significant antibacterial activity and synergy with commercial antibiotics against human pathogenic bacteria. The mechanism underlying antibacterial activity was determined based on bacterial cell membrane disruption and cytoplasmic content leakage. PNL-AgNPs potentially constrain the activity of α-glucosidase and α-amylase enzymes, which are marker enzymes of diabetes. The results obtained indicate the potential application of synthesized PNL-AgNPs in environmental and nano-biomedical applications.

更新日期：2020-08-01

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