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通过原位氧化镁模板法制备的磁性介孔碳用于快速去除重金属离子

Magnetic Mesoporous Carbons Derived from in Situ MgO Template Formation for Fast Removal of Heavy Metal Ions.

作者信息

Zhang Qiangying, He Man, Chen Beibei, Hu Bin

机构信息

Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.

出版信息

ACS Omega. 2018 Apr 3;3(4):3752-3759. doi: 10.1021/acsomega.7b01989. eCollection 2018 Apr 30.

DOI:10.1021/acsomega.7b01989
PMID:31458619
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6641504/
Abstract

In this paper, magnetic mesoporous carbon composites were prepared by calcination of the mixture of magnesium citrate and FeO@SiO in an inert atmosphere. A high content of FeO@SiO and MgO was in situ embedded in a carbon matrix. After removing the MgO template by diluted acid, the resulting material (FeO@SiO@mC) was subjected to further HO oxidation treatment. The formed oxygen-containing functional groups on the products provided plenty of active sites for the adsorption of analytes of interest. The obtained composites (FeO@SiO@mC-HO) exhibited a mesoporous structure with a high specific surface area of 731 m g. The adsorption capacities of FeO@SiO@mC-HO for Cu(II) and Pb(II) were calculated to be 86.5 and 156 mg g, respectively. Under optimal conditions, the adsorption isotherm of Cu(II) and Pb(II) onto FeO@SiO@mC-HO fitted the Langmuir model and the adsorption kinetic was well-correlated with the pseudo-second-order model. Besides, FeO@SiO@mC-HO exhibited fast removal dynamics (within less than 1 min) for Cu(II) and Pb(II), demonstrating great application potential in wastewater treatment.

摘要

在本文中，通过在惰性气氛中煅烧柠檬酸镁和FeO@SiO的混合物制备了磁性介孔碳复合材料。高含量的FeO@SiO和MgO原位嵌入碳基质中。用稀酸去除MgO模板后，将所得材料（FeO@SiO@mC）进行进一步的HO氧化处理。产物上形成的含氧官能团为目标分析物的吸附提供了大量活性位点。所获得的复合材料（FeO@SiO@mC-HO）呈现出介孔结构，比表面积高达731 m²/g。计算得出FeO@SiO@mC-HO对Cu(II)和Pb(II)的吸附容量分别为86.5和156 mg/g。在最佳条件下，Cu(II)和Pb(II)在FeO@SiO@mC-HO上的吸附等温线符合Langmuir模型，吸附动力学与准二级模型相关性良好。此外，FeO@SiO@mC-HO对Cu(II)和Pb(II)表现出快速去除动力学（在不到1分钟内），在废水处理中显示出巨大的应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/15d16ddeb309/ao-2017-01989j_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/5086623c25b5/ao-2017-01989j_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/6810d8b98819/ao-2017-01989j_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/14536efab740/ao-2017-01989j_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/6495e480e112/ao-2017-01989j_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/216bb1ef3400/ao-2017-01989j_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/15d16ddeb309/ao-2017-01989j_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/5086623c25b5/ao-2017-01989j_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/6810d8b98819/ao-2017-01989j_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/14536efab740/ao-2017-01989j_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/6495e480e112/ao-2017-01989j_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/216bb1ef3400/ao-2017-01989j_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/796b/6641504/15d16ddeb309/ao-2017-01989j_0006.jpg

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