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利用帕氏马尾藻提取物绿色合成氧化锌纳米颗粒用于高效光催化去除亚甲基蓝

Green synthesis of zinc oxide nanoparticles using Padina pavonica extract for efficient photocatalytic removal of methylene blue.

作者信息

Alprol Ahmed E, Eleryan Ahmed, Abouelwafa Ahmed, Gad Ahmed M, Hamad Tarek M

机构信息

National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt.

出版信息

Sci Rep. 2024 Dec 31;14(1):32160. doi: 10.1038/s41598-024-80757-9.

DOI:10.1038/s41598-024-80757-9
PMID:39741157
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11688442/
Abstract

Dye-laden wastewater poses a significant environmental and health threat. This study investigated the potential of green-synthesized zinc oxide nanoparticles (ZnO NPs), derived from Padina pavonica brown algae extract, for the removal of methylene blue (MB) dye. The hypothesis was that utilizing algal extract for ZnO NP synthesis would enhance adsorption capacity and photocatalytic activity for dye removal. The synthesized ZnO NPs, characterized by Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX) and Zeta Potential, demonstrated high adsorption capacity (Qm = 192.308 mg g) and excellent removal efficiency (> 98%) for MB at low dye concentrations. Langmuir isotherm and pseudo-second-order kinetic models best fit the experimental data, suggesting monolayer adsorption and chemisorption as the primary mechanisms. Notably, the green ZnO NPs exhibited greater photocatalytic activity under direct sunlight irradiation compared to other light sources. Additionally, these nanoparticles displayed antimicrobial properties against various bacteria, indicating potential for water disinfection. This research offers a sustainable and environmentally friendly approach for wastewater treatment utilizing green ZnO NPs for efficient dye removal and potential water disinfection applications.

摘要

含染料废水对环境和健康构成重大威胁。本研究调查了由帕氏马尾藻棕色藻类提取物绿色合成的氧化锌纳米颗粒（ZnO NPs）去除亚甲基蓝（MB）染料的潜力。假设是利用藻类提取物合成ZnO NPs将提高对染料去除的吸附能力和光催化活性。通过红外光谱（FTIR）、扫描电子显微镜（SEM）、能量色散X射线光谱（EDX）和zeta电位表征的合成ZnO NPs在低染料浓度下对MB表现出高吸附容量（Qm = 192.308 mg/g）和优异的去除效率（>98%）。朗缪尔等温线和准二级动力学模型最符合实验数据，表明单层吸附和化学吸附是主要机制。值得注意的是，与其他光源相比，绿色ZnO NPs在阳光直射下表现出更高的光催化活性。此外，这些纳米颗粒对各种细菌具有抗菌特性，表明具有水消毒潜力。本研究提供了一种可持续且环保的废水处理方法，利用绿色ZnO NPs进行高效染料去除和潜在的水消毒应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/429009677086/41598_2024_80757_Fig12_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/429009677086/41598_2024_80757_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/189cfb2976da/41598_2024_80757_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/1c3c6f7de915/41598_2024_80757_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/1dc0bde340e0/41598_2024_80757_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/65cebda8bc14/41598_2024_80757_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/165fe8177340/41598_2024_80757_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/b2426dd61dc0/41598_2024_80757_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/b5f6085e2eb7/41598_2024_80757_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/4983b222e5e1/41598_2024_80757_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/6b7ccdeee14d/41598_2024_80757_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/54c8bfef3d3e/41598_2024_80757_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/912e1860df99/41598_2024_80757_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9551/11688442/429009677086/41598_2024_80757_Fig12_HTML.jpg

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