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利用睡茄修饰的MnO纳米颗粒进行阳光驱动的工业染料光催化降解

Sunlight-driven photocatalytic degradation of industrial dyes using Withania somnifera decorated MnO nanoparticles.

作者信息

Chaudhary Mahi, Kumar Chetan, Raghav Sapna, Panwar Medha, Pandey Shivam, Painuli Ritu

机构信息

Department of Chemistry, School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, 248007, India.

School of Pharmaceutical and Populations Health Informatics, Faculty of Pharmacy, DIT University, Dehradun, Uttarakhand, 248009, India.

出版信息

Discov Nano. 2024 Dec 17;19(1):206. doi: 10.1186/s11671-024-04160-z.

DOI:10.1186/s11671-024-04160-z
PMID:39690345
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11652462/
Abstract

This study presents a unique, fast, and environmentally friendly approach for synthesizing MnO nanoparticles (MnO NPs) utilizing Withania somnifera (Ashwagandha) extract. The formation of nanoparticles was indicated by a color change from dark purple to dark brown within 10 min and validated through techniques including UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), and Energy Dispersive X-ray (EDX). Bromocresol green and Bromothymol blue were established as standards for assessing the photocatalytic efficiency of the synthesized nanoparticles. The synthesized nanocatalyst exhibited remarkable removal efficiency upon sunlight exposure, achieving 92% for Bromothymol blue and 95% for Bromocresol green within a duration of 1 h. The influence of variables including duration, photocatalyst dosage, and photodegradation kinetics was carefully examined to assess the efficacy of the created photocatalyst. The devised procedure is environmentally benign, facile to execute, and does not necessitate any chemical agents or advanced instrumentation for synthesis. This presents a new opportunity for the advancement of green photocatalysts, which may serve as an outstanding nanomaterial for wastewater clean-up.

摘要

本研究提出了一种独特、快速且环保的方法，利用印度人参提取物合成二氧化锰纳米颗粒（MnO NPs）。纳米颗粒的形成在10分钟内通过颜色从深紫色变为深棕色得以指示，并通过紫外可见光谱、场发射扫描电子显微镜（FESEM）、傅里叶变换红外光谱（FTIR）和能量色散X射线（EDX）等技术进行了验证。溴甲酚绿和溴百里酚蓝被确立为评估合成纳米颗粒光催化效率的标准。合成的纳米催化剂在阳光照射下表现出显著的去除效率，在1小时内对溴百里酚蓝的去除率达到92%，对溴甲酚绿的去除率达到95%。仔细研究了包括时间、光催化剂用量和光降解动力学等变量的影响，以评估所制备光催化剂的效果。所设计的方法对环境友好，易于实施，合成过程无需任何化学试剂或先进仪器。这为绿色光催化剂的发展提供了新机会，绿色光催化剂可作为废水净化的优异纳米材料。

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