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巯基功能化磁铁矿/氧化石墨烯杂化材料作为一种可重复使用的 Hg2+去除吸附剂。

Thiol-functionalized magnetite/graphene oxide hybrid as a reusable adsorbent for Hg2+ removal.

机构信息

Jiangsu Provincial Academy of Environmental Science, 241 Fenghuang West Street, Nanjing, Jiangsu 210036, China.

出版信息

Nanoscale Res Lett. 2013 Nov 19;8(1):486. doi: 10.1186/1556-276X-8-486.

DOI:10.1186/1556-276X-8-486
PMID:24252617
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3842736/
Abstract

A thiol-functionalized magnetite/graphene oxide (MGO) hybrid as an adsorbent of Hg2+ was successfully synthesized by a two-step reaction. It exhibited a higher adsorption capacity compared to the bare graphene oxide and MGO due to the combined adsorption of thiol groups and magnetite nanocrystals. Its capacity reached 289.9 mg g-1 in a solution with an initial Hg2+ concentration of 100 mg l-1. After being exchanged with H+, the adsorbent could be reused. The adsorption of Hg2+ by the thiol-functionalized MGO fits well with the Freundlich isotherm model and followed pseudo-second-order kinetics.

摘要

一种巯基功能化的磁铁矿/氧化石墨烯（MGO）杂化物通过两步反应成功合成，作为 Hg2+ 的吸附剂。与裸氧化石墨烯和 MGO 相比，由于巯基基团和磁铁矿纳米晶体的联合吸附，它表现出更高的吸附容量。在初始 Hg2+浓度为 100mg/L 的溶液中，其容量达到 289.9mg/g。用 H+ 交换后，吸附剂可以重复使用。Hg2+ 通过巯基功能化的 MGO 的吸附很好地符合 Freundlich 等温线模型，并遵循准二级动力学。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/db4000022a94/1556-276X-8-486-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/31ed5177c16c/1556-276X-8-486-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/19b3cb60c130/1556-276X-8-486-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/7284923fba87/1556-276X-8-486-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/31364413e771/1556-276X-8-486-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/db4000022a94/1556-276X-8-486-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/31ed5177c16c/1556-276X-8-486-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/19b3cb60c130/1556-276X-8-486-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/7284923fba87/1556-276X-8-486-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/31364413e771/1556-276X-8-486-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6dab/3842736/db4000022a94/1556-276X-8-486-5.jpg

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