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采用诃子叶提取物的 AgNPs 的生物合成及其对有机染料催化降解的功效。

Biogenic synthesis of AgNPs employing Terminalia arjuna leaf extract and its efficacy towards catalytic degradation of organic dyes.

机构信息

Laboratory of Plant Pathology, Department of Botany, University College of Science, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, India.

Plant Bioenergetics and Biotechnology Laboratory, Department of Botany, University College of Science, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, India.

出版信息

Sci Rep. 2020 Jun 15;10(1):9616. doi: 10.1038/s41598-020-66851-8.

DOI:10.1038/s41598-020-66851-8
PMID:32541840
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7295755/
Abstract

In the present work, we demonstrated the biosynthesis of silver nanoparticles (AgNPs) by highly stable, economic and eco-friendly method using leaf extract of Terminalia arjuna (T. arjuna) and employing as a catalyst for the degradation of methyl orange (MO), methylene blue (MB), congo red (CR) and 4- nitrophenol (4-NP). The biosynthesis of AgNPs was visually validated through the appearance of reddish-brown color and further confirmed by the UV-spectra at 418 nm. The TEM and FE-SEM studies revealed the spherical shape of particles with size ranged between 10-50 nm. Face centered cubic crystalline nature of AgNPs was proved by XRD analysis. The negative value of zeta potential (-21.7) indicated the stability of AgNPs and elemental composition was confirmed by EDS. FT-IR analysis revealed the functional groups present in the plant extract trigger the biosynthesis of AgNPs. The AgNPs exhibited strong degradation of MO (86.68%), MB (93.60%), CR (92.20%) and 4NP (88.80%) by completing the reduction reaction within 20 min. The reaction kinetics followed the pseudo-first-order and displayed k-values (rate constant) 0.166 min, 0.138 min, 0.182 min and 0.142 min for MO, MB, CR and 4-NP respectively. This study showed an efficient, feasible and reproducible method for the biosynthesis of eco-friendly, cheap and long-time stable AgNPs and their application as potent catalysts against the degradation of hazardous dyes.

摘要

在本工作中，我们展示了使用Terminalia arjuna（T. arjuna）叶提取物通过高度稳定、经济和环保的方法合成银纳米粒子（AgNPs），并将其用作降解甲基橙（MO）、亚甲基蓝（MB）、刚果红（CR）和 4-硝基苯酚（4-NP）的催化剂。AgNPs 的生物合成通过出现红棕色外观进行了直观验证，并通过在 418nm 处的 UV 光谱进一步确认。TEM 和 FE-SEM 研究表明，颗粒呈球形，尺寸在 10-50nm 之间。XRD 分析证明了 AgNPs 的面心立方晶态性质。负的zeta 电位（-21.7）表明了 AgNPs 的稳定性，EDS 证实了元素组成。FT-IR 分析表明，植物提取物中的官能团引发了 AgNPs 的生物合成。AgNPs 在 20min 内完成还原反应，对 MO（86.68%）、MB（93.60%）、CR（92.20%）和 4NP（88.80%）表现出强烈的降解作用。反应动力学遵循拟一级反应，并显示出 MO（k 值（速率常数）为 0.166 min）、MB（k 值为 0.138 min）、CR（k 值为 0.182 min）和 4-NP（k 值为 0.142 min）的 k 值。该研究展示了一种高效、可行且可重复的方法，用于生物合成环保、廉价且长时间稳定的 AgNPs，并将其作为潜在催化剂应用于危险染料的降解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/2d8ca183f322/41598_2020_66851_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/af52502b2865/41598_2020_66851_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/1d7776fc7ea6/41598_2020_66851_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/c96deed22551/41598_2020_66851_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/f89351e299ca/41598_2020_66851_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/693311bed37b/41598_2020_66851_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/88c6c1df55e9/41598_2020_66851_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/6aed777cd088/41598_2020_66851_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/7f9839d896ec/41598_2020_66851_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/a5b2c0b69306/41598_2020_66851_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/2d8ca183f322/41598_2020_66851_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/af52502b2865/41598_2020_66851_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/1d7776fc7ea6/41598_2020_66851_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/c96deed22551/41598_2020_66851_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/f89351e299ca/41598_2020_66851_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/693311bed37b/41598_2020_66851_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/88c6c1df55e9/41598_2020_66851_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/6aed777cd088/41598_2020_66851_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/7f9839d896ec/41598_2020_66851_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/a5b2c0b69306/41598_2020_66851_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db8/7295755/2d8ca183f322/41598_2020_66851_Fig10_HTML.jpg

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本文引用的文献

[1]
Green synthesis and characterization of silver nanoparticles using Enicostemma axillare (Lam.) leaf extract.

Biochem Biophys Res Commun. 2018-8-6

[2]
Antimicrobial Activity of Green Synthesized Silver Nanoparticles Against Selected Gram-negative Foodborne Pathogens.

Front Microbiol. 2018-7-16

[3]
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Sci Rep. 2018-4-19

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Green synthesis, characterization and catalytic degradation studies of gold nanoparticles against congo red and methyl orange.

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Reduced Graphene Oxide-Based Silver Nanoparticle-Containing Composite Hydrogel as Highly Efficient Dye Catalysts for Wastewater Treatment.

Sci Rep. 2015-7-17

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Carbohydr Polym. 2012-3-7

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Catalytic degradation of organic dyes using biosynthesized silver nanoparticles.

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