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A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres

Fe(3)O(4)@SiO(2) nanospheres with a core–shell structure were synthesized and functionalized with bis(2-pyridylmethyl)amine (BPMA). The photoresponses of the as-obtained Fe(3)O(4)@SiO(2)-BPMA for Cr(3+), Cd(2+), Hg(2+) and Pb(2+) ions were evaluated through irradiation with a 352 nm ultraviolet lamp...

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Autores principales: Xu, Yaohui, Deng, Chi, Xiao, Zhigang, Chen, Chang, Luo, Xufeng, Zhou, Yang, Jiang, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7504229/
https://www.ncbi.nlm.nih.gov/pubmed/32825384
http://dx.doi.org/10.3390/ma13173678
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author Xu, Yaohui
Deng, Chi
Xiao, Zhigang
Chen, Chang
Luo, Xufeng
Zhou, Yang
Jiang, Qiang
author_facet Xu, Yaohui
Deng, Chi
Xiao, Zhigang
Chen, Chang
Luo, Xufeng
Zhou, Yang
Jiang, Qiang
author_sort Xu, Yaohui
collection PubMed
description Fe(3)O(4)@SiO(2) nanospheres with a core–shell structure were synthesized and functionalized with bis(2-pyridylmethyl)amine (BPMA). The photoresponses of the as-obtained Fe(3)O(4)@SiO(2)-BPMA for Cr(3+), Cd(2+), Hg(2+) and Pb(2+) ions were evaluated through irradiation with a 352 nm ultraviolet lamp, and Fe(3)O(4)@SiO(2)-BPMA exhibited remarkable fluorescence enhancement toward the Cd(2+) ion. The adsorption experiments revealed that Fe(3)O(4)@SiO(2)-BPMA had rapid and effective adsorption toward the Cd(2+) ion. The adsorption reaction was mostly complete within 30 min, the adsorption efficiency reached 99.3%, and the saturated adsorption amount was 342.5 mg/g based on Langmuir linear fitting. Moreover, Fe(3)O(4)@SiO(2)-BPMA displayed superparamagnetic properties with the saturated magnetization of 20.1 emu/g, and its strong magnetic sensitivity made separation simple and feasible. Our efforts in this work provide a potential magnetic functionalized nanosensor for naked-eye identification and adsorption toward the Cd(2+) ion.
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spelling pubmed-75042292020-09-24 A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres Xu, Yaohui Deng, Chi Xiao, Zhigang Chen, Chang Luo, Xufeng Zhou, Yang Jiang, Qiang Materials (Basel) Article Fe(3)O(4)@SiO(2) nanospheres with a core–shell structure were synthesized and functionalized with bis(2-pyridylmethyl)amine (BPMA). The photoresponses of the as-obtained Fe(3)O(4)@SiO(2)-BPMA for Cr(3+), Cd(2+), Hg(2+) and Pb(2+) ions were evaluated through irradiation with a 352 nm ultraviolet lamp, and Fe(3)O(4)@SiO(2)-BPMA exhibited remarkable fluorescence enhancement toward the Cd(2+) ion. The adsorption experiments revealed that Fe(3)O(4)@SiO(2)-BPMA had rapid and effective adsorption toward the Cd(2+) ion. The adsorption reaction was mostly complete within 30 min, the adsorption efficiency reached 99.3%, and the saturated adsorption amount was 342.5 mg/g based on Langmuir linear fitting. Moreover, Fe(3)O(4)@SiO(2)-BPMA displayed superparamagnetic properties with the saturated magnetization of 20.1 emu/g, and its strong magnetic sensitivity made separation simple and feasible. Our efforts in this work provide a potential magnetic functionalized nanosensor for naked-eye identification and adsorption toward the Cd(2+) ion. MDPI 2020-08-20 /pmc/articles/PMC7504229/ /pubmed/32825384 http://dx.doi.org/10.3390/ma13173678 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Yaohui
Deng, Chi
Xiao, Zhigang
Chen, Chang
Luo, Xufeng
Zhou, Yang
Jiang, Qiang
A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title_full A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title_fullStr A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title_full_unstemmed A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title_short A Nanosensor for Naked-Eye Identification and Adsorption of Cadmium Ion Based on Core–Shell Magnetic Nanospheres
title_sort nanosensor for naked-eye identification and adsorption of cadmium ion based on core–shell magnetic nanospheres
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7504229/
https://www.ncbi.nlm.nih.gov/pubmed/32825384
http://dx.doi.org/10.3390/ma13173678
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