Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption

A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, conc...

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Main Authors: Liu, Yan, Zhao, Zhengping, Yuan, Dingzhong, Wang, Yun, Dai, Ying, Zhu, Yean, Chew, Jia Wei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/150582
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1505822021-06-07T04:45:23Z Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption Liu, Yan Zhao, Zhengping Yuan, Dingzhong Wang, Yun Dai, Ying Zhu, Yean Chew, Jia Wei School of Chemical and Biomedical Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Chemical engineering Polyphosphazene Amino A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, concentration, contact time and temperature on the U(VI) removal process. The maximum adsorption capacity was calculated as 250 mg/g by considering Langmuir isotherm model and the adsorption process was also explained with pseudo-second-order kinetics. Adsorption tests in the presence of competing ions exhibited high selectivity for U(VI). The thermodynamic parameters indicate that the process was spontaneous and endothermic. The interaction mechanism of U(VI) with NH2-PZS/CNT/Fe3O4 was systematically clarified by using X-ray photoelectron spectroscopy (XPS) and Fourier transformation infrared (FTIR). Overall, the prepared NH2-PZS/CNT/Fe3O4 composite, which displayed important advantages such as re-usability, high adsorption capacity and selectivity, is a good adsorbent candidate for the removal of U(VI) from wastewater. 2021-06-07T04:45:23Z 2021-06-07T04:45:23Z 2019 Journal Article Liu, Y., Zhao, Z., Yuan, D., Wang, Y., Dai, Y., Zhu, Y. & Chew, J. W. (2019). Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption. Applied Surface Science, 466, 893-902. https://dx.doi.org/10.1016/j.apsusc.2018.10.097 0169-4332 https://hdl.handle.net/10356/150582 10.1016/j.apsusc.2018.10.097 2-s2.0-85054914980 466 893 902 en Applied Surface Science © 2018 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Chemical engineering
Polyphosphazene
Amino
spellingShingle Engineering::Chemical engineering
Polyphosphazene
Amino
Liu, Yan
Zhao, Zhengping
Yuan, Dingzhong
Wang, Yun
Dai, Ying
Zhu, Yean
Chew, Jia Wei
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
description A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, concentration, contact time and temperature on the U(VI) removal process. The maximum adsorption capacity was calculated as 250 mg/g by considering Langmuir isotherm model and the adsorption process was also explained with pseudo-second-order kinetics. Adsorption tests in the presence of competing ions exhibited high selectivity for U(VI). The thermodynamic parameters indicate that the process was spontaneous and endothermic. The interaction mechanism of U(VI) with NH2-PZS/CNT/Fe3O4 was systematically clarified by using X-ray photoelectron spectroscopy (XPS) and Fourier transformation infrared (FTIR). Overall, the prepared NH2-PZS/CNT/Fe3O4 composite, which displayed important advantages such as re-usability, high adsorption capacity and selectivity, is a good adsorbent candidate for the removal of U(VI) from wastewater.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Liu, Yan
Zhao, Zhengping
Yuan, Dingzhong
Wang, Yun
Dai, Ying
Zhu, Yean
Chew, Jia Wei
format Article
author Liu, Yan
Zhao, Zhengping
Yuan, Dingzhong
Wang, Yun
Dai, Ying
Zhu, Yean
Chew, Jia Wei
author_sort Liu, Yan
title Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
title_short Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
title_full Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
title_fullStr Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
title_full_unstemmed Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
title_sort introduction of amino groups into polyphosphazene framework supported on cnt and coated fe3o4 nanoparticles for enhanced selective u(vi) adsorption
publishDate 2021
url https://hdl.handle.net/10356/150582
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