微波辅助植物合成银纳米粒子对有毒汞离子的感应和作为环境污染物处理的催化剂

IF 0.5 4区 化学 Q4 CHEMISTRY, ANALYTICAL
Mamatha Susan Punnoose, Binila K. Korah, Beena Mathew
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引用次数: 0

摘要

采用微波辅助法制备了以Coleus amboinicus (CA)鲜叶提取物为封盖剂和还原剂的纳米银(AgNP)。植物合成的AgNP与CA (AgNP-CA)表现出对汞离子的高度选择性光学和电化学传感能力。采用紫外可见光谱(UV-vis)、x射线衍射(XRD)、傅里叶变换红外(FTIR)、能量色散x射线(EDX)、透射电子显微镜(TEM)、zeta电位和动态光散射(DLS)技术对AgNP-CA及其与Hg2+离子络合AgNP-CA (AgNP-CA-Hg2+)进行了表征。AgNP-CA与Hg2+离子的有效络合导致了肉眼可见的颜色变化,并通过紫外可见光谱证实了这一点。绿色制备的电化学AgNP-CA修饰铂电极(AgNP-CA- pt)传感器采用差分脉冲伏安法(DPV)检测限(LOD)为0.8524µM。考察了AgNP-CA对NaBH4还原有毒有机染料刚果红和红花红的催化潜力。催化还原在几分钟内完成,并遵循伪一级动力学模型。通过实验确定了催化剂浓度与还原率之间的线性关系。这种生态友好的AgNP-CA合成方法及其应用是监测和管理环境污染的有用工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Microwave Assisted Phytosynthesised Silver Nanoparticles for the Sensing of Toxic Mercuric Ions and as Catalyst for the Treatment of Environmental Pollutants

Microwave Assisted Phytosynthesised Silver Nanoparticles for the Sensing of Toxic Mercuric Ions and as Catalyst for the Treatment of Environmental Pollutants

Silver nanoparticles (AgNP) were prepared using the fresh leaf extract of Coleus amboinicus (CA) as both the capping and reducing agent through a microwave-assisted method. The phytosynthesized AgNP with CA (AgNP-CA) demonstrated highly selective optical and electrochemical sensing capabilities for mercuric ions. The AgNP-CA and complexation AgNP-CA with Hg2+ ions (AgNP-CA-Hg2+) were characterized using UV-vis spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared (FTIR), energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), zeta potential, and dynamic light scattering (DLS) techniques. The effective complexation of AgNP-CA with Hg2+ ions resulted in visually observable colour changes, confirmed by UV-vis spectroscopy. The green-fabricated electrochemical AgNP-CA modified platinum electrode (AgNP-CA-Pt) sensor exhibited a limit of detection (LOD) of 0.8524 µM using the differential pulse voltammetry (DPV) method. The catalytic potential of AgNP-CA for the reduction of toxic organic dyes, Congo Red and Safranin, using NaBH4 was also examined. The catalytic reductions were completed within a few minutes and followed a pseudo-first-order kinetics model. The linear relationship between catalyst concentration and reduction rates was experimentally determined. This eco-friendly approach to AgNP-CA synthesis and its applications is a useful tool for monitoring and managing environmental pollution.

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来源期刊
Journal of Water Chemistry and Technology
Journal of Water Chemistry and Technology CHEMISTRY, APPLIED-CHEMISTRY, ANALYTICAL
自引率
0.00%
发文量
51
审稿时长
>12 weeks
期刊介绍: Journal of Water Chemistry and Technology focuses on water and wastewater treatment, water pollution monitoring, water purification, and similar topics. The journal publishes original scientific theoretical and experimental articles in the following sections: new developments in the science of water; theoretical principles of water treatment and technology; physical chemistry of water treatment processes; analytical water chemistry; analysis of natural and waste waters; water treatment technology and demineralization of water; biological methods of water treatment; and also solicited critical reviews summarizing the latest findings. The journal welcomes manuscripts from all countries in the English or Ukrainian language. All manuscripts are peer-reviewed.
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