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核壳型纳米零价铁（CS-nZVI）的自下而上合成方法：对铜（II）离子吸附应用的物理化学和光谱表征

Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application.

作者信息

Dada Adewumi Oluwasogo, Adekola Folahan Amoo, Odebunmi Ezekiel Oluyemi, Dada Fehintoluwa Elizabeth, Bello Olugbenga Solomon, Ogunlaja Adeniyi Sunday

机构信息

Industrial Chemistry Programme, Department of Physical Sciences, Landmark University, PMB 1001, Omu Aran, Nigeria.

Department of Industrial Chemistry, University of Ilorin, PMB 1515, Nigeria.

出版信息

MethodsX. 2020 Jun 25;7:100976. doi: 10.1016/j.mex.2020.100976. eCollection 2020.

DOI:10.1016/j.mex.2020.100976
PMID:32670804
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7341451/
Abstract

Single pot system in chemical reduction via bottom-up approach was used for the synthesis of core shell nanoscale zerovalent iron (CS-nZVI). CS-nZVI was characterized by a combination of physicochemical and spectroscopic techniques. Data obtained showed BET surface area 20.8643 m/g, t-Plot micropore volume 0.001895 cm/g, BJH volume pores 0.115083 cm/g, average pore width 186.9268 Å, average pore diameter 240.753 Å, PZC 5.24, and pH 6.80. Surface plasmon Resonance from UV-Vis spectrophotometer was observed at 340 nm. Surface morphology from SEM and TEM revealed a spherical cluster and chain-like nanostructure of size range 15.425 nm -97.566 nm. Energy Dispersive XRF revealed an elemental abundance of 96.05% core shell indicating the dominance of nZVI. EDX showed an intense peak of nZVI at 6.2 keV. FTIR data revealed the surface functional groups of Fe-O with characteristics peaks at 686.68 cm, 569.02 cm and 434 cm. In a batch technique, effective adsorption of endocrine disruptive Cu(II) ions was operational parameters dependent. Isotherm and kinetics studies were validated by statistical models. The study revealed unique characteristics of CS-nZVI and its efficacy in waste water treatment.

摘要

采用自下而上的方法，通过单锅系统进行化学还原，合成了核壳纳米级零价铁（CS-nZVI）。通过物理化学和光谱技术相结合的方法对CS-nZVI进行了表征。获得的数据显示，BET表面积为20.8643 m/g，t-Plot微孔体积为0.001895 cm/g，BJH体积孔为0.115083 cm/g，平均孔宽为186.9268 Å，平均孔径为240.753 Å，零电荷点为5.24，pH值为6.80。紫外可见分光光度计观察到表面等离子体共振在340 nm处。扫描电子显微镜（SEM）和透射电子显微镜（TEM）的表面形态显示出尺寸范围为15.425 nm - 97.566 nm的球形簇和链状纳米结构。能量色散X射线荧光光谱（EDXRF）显示核壳元素丰度为96.05%，表明nZVI占主导地位。能谱分析（EDX）显示nZVI在6.2 keV处有一个强峰。傅里叶变换红外光谱（FTIR）数据显示Fe-O的表面官能团在686.68 cm、569.02 cm和434 cm处有特征峰。在间歇技术中，内分泌干扰性铜（II）离子的有效吸附取决于操作参数。等温线和动力学研究通过统计模型进行了验证。该研究揭示了CS-nZVI的独特特性及其在废水处理中的功效。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bec4/7341451/b52b6b8d4487/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bec4/7341451/c587cfdae261/fx1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bec4/7341451/2702b9e7cda7/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bec4/7341451/78c0024f192c/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bec4/7341451/694f3b081650/gr3.jpg
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