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使用新型叶提取物制备的氧化锌纳米颗粒中增强的光催化活性。

Enhanced photocatalytic activity in ZnO nanoparticles developed using novel leaf extract.

作者信息

K K Supin, P M Parvathy Namboothiri, Vasundhara M

机构信息

Polymers and Functional Materials Department, CSIR- Indian Institute of Chemical Technology Hyderabad 500007 India

Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India.

出版信息

RSC Adv. 2023 Jan 6;13(3):1497-1515. doi: 10.1039/d2ra06967a.

DOI:10.1039/d2ra06967a
PMID:36688071
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9819108/
Abstract

The present study focuses on the green synthesis of zinc oxide nanoparticles (ZnO NPs) using a novel (LA) leaf extract and a systematic study on the photocatalytic degradation of methylene blue (MB) dye. The structural, thermal, morphological, optical, and surface area analysis of prepared ZnO NPs were examined using X-ray diffraction (XRD), UV-visible spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analysis, thermogravimetric analysis (TGA), field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDAX) and high-resolution transmission electron microscopy (HR-TEM). The LA stabilised ZnO NPs produced NPs with diverse morphologies, low band gap and cost-effective high yield of production. A systematic study has been carried out to determine the crystallinity and crystallite size of ZnO NPs based on the concentration of Zn(NO) precursor, concentration of LA leaf extract, calcination temperature and calcination time. The crystallinity and crystallite size of ZnO NPs were evaluated based on the XRD technique. The photocatalytic activity of ZnO NPs was thoroughly investigated for the degradation of MB dye based on various physicochemical parameters such as reaction time, concentration of catalyst, concentration of precursors, concentration of LA extract, concentration of MB, calcination temperature and calcination time. These systematic photocatalytic studies followed green protocols and provided an excellent photocatalytic efficiency result of 96-98.5% towards the decomposition of MB. Hence, this material can work as a potential candidate for waste water treatment by also degrading other toxic dyes.

摘要

本研究聚焦于使用新型（LA）叶提取物绿色合成氧化锌纳米颗粒（ZnO NPs），并对亚甲基蓝（MB）染料的光催化降解进行系统研究。使用X射线衍射（XRD）、紫外可见光谱、拉曼光谱、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）、布鲁诺尔-埃米特-泰勒（BET）分析、热重分析（TGA）、场发射扫描电子显微镜（FE-SEM）、能量色散X射线分析（EDAX）和高分辨率透射电子显微镜（HR-TEM）对制备的ZnO NPs进行结构、热、形态、光学和表面积分析。LA稳定的ZnO NPs产生了具有多种形态、低带隙且成本效益高产量的纳米颗粒。基于硝酸锌（Zn(NO)）前驱体浓度、LA叶提取物浓度、煅烧温度和煅烧时间，开展了一项系统研究以确定ZnO NPs的结晶度和晶粒尺寸。基于XRD技术评估了ZnO NPs的结晶度和晶粒尺寸。基于反应时间、催化剂浓度、前驱体浓度、LA提取物浓度、MB浓度、煅烧温度和煅烧时间等各种物理化学参数，对ZnO NPs降解MB染料的光催化活性进行了深入研究。这些系统的光催化研究遵循绿色方案，对MB的分解提供了96 - 98.5%的优异光催化效率结果。因此，这种材料还可通过降解其他有毒染料，作为废水处理的潜在候选材料。

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