Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe3O4/Ag/Polyoxometalates Ternary Nanocomposites

The ternary nanocomposites Fe3O4/Ag/polyoxometalates (Fe3O4/Ag/POMs) with core−shell−core nanostructure were synthesized by coating [Cu(C6H6N&...

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Main Authors:	Shixia Zhan, Chunyan Li, Heyun Tian, Chenguang Ma, Hongling Liu, Jie Luo, Mingxue Li
Format:	Article
Language:	English
Published:	MDPI AG 2019-09-01
Series:	Nanomaterials
Subjects:	ternary nanocomposites magnetic–opto properties dye removal
Online Access:	https://www.mdpi.com/2079-4991/9/9/1255

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spelling	doaj-0c9a800bdb774e519aa8aefb08f475f92020-11-25T02:07:16ZengMDPI AGNanomaterials2079-49912019-09-0199125510.3390/nano9091255nano9091255Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary NanocompositesShixia Zhan0Chunyan Li1Heyun Tian2Chenguang Ma3Hongling Liu4Jie Luo5Mingxue Li6Henan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaHenan Key Laboratory of Polyoxometalates, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaThe ternary nanocomposites Fe<sub>3</sub>O<sub>4</sub>/Ag/polyoxometalates (Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs) with core−shell−core nanostructure were synthesized by coating [Cu(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>(H<sub>2</sub>O)]H<sub>2</sub>[Cu(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>(P<sub>2</sub>Mo<sub>5</sub>O<sub>23</sub>)]·4H<sub>2</sub>O polyoxometalates on the surface of Fe<sub>3</sub>O<sub>4</sub>/Ag (core−shell) nanoparticles. The transmission electron microscopy/high resolution transmission electron microscopy (HR-TEM) and X-ray powder diffraction (XRD) analyses show that the Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs ternary nanocomposites reveal a core−shell−core nanostructure, good dispersibility, and high crystallinity. The vibrating sample magnetometer (VSM) and physical property measurement system (PPMS) demonstrated the good magnetic properties and superparamagnetic behavior of the nanocomposites at 300 K. The UV−vis spectroscopy displayed the broadband absorption of the Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs with the maximum surface plasmon resonance of Ag nanostructure around 420 nm. The dye removal capacity of Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs was investigated using methylene blue (MB) as a probe. Through adsorption and photocatalysis, the nanocomposites could quickly remove MB with a removal efficiency of 98.7% under the irradiation of visible light at room temperature. The removal efficiency was still as high as 97.5% even after six runs by magnetic separation of photocatalytic adsorbents after processing, indicating the reusability and high stability of the nanocomposites. These Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs photocatalytic adsorbents with magnetic properties will hopefully become a functional material for wastewater treatment in the future.https://www.mdpi.com/2079-4991/9/9/1255ternary nanocompositesmagnetic–opto propertiesdye removal
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Shixia Zhan Chunyan Li Heyun Tian Chenguang Ma Hongling Liu Jie Luo Mingxue Li
spellingShingle	Shixia Zhan Chunyan Li Heyun Tian Chenguang Ma Hongling Liu Jie Luo Mingxue Li Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites Nanomaterials ternary nanocomposites magnetic–opto properties dye removal
author_facet	Shixia Zhan Chunyan Li Heyun Tian Chenguang Ma Hongling Liu Jie Luo Mingxue Li
author_sort	Shixia Zhan
title	Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites
title_short	Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites
title_full	Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites
title_fullStr	Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites
title_full_unstemmed	Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites
title_sort	synthesis, characterization and dye removal behavior of core–shell–shell fe<sub>3</sub>o<sub>4</sub>/ag/polyoxometalates ternary nanocomposites
publisher	MDPI AG
series	Nanomaterials
issn	2079-4991
publishDate	2019-09-01
description	The ternary nanocomposites Fe<sub>3</sub>O<sub>4</sub>/Ag/polyoxometalates (Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs) with core−shell−core nanostructure were synthesized by coating [Cu(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>(H<sub>2</sub>O)]H<sub>2</sub>[Cu(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>(P<sub>2</sub>Mo<sub>5</sub>O<sub>23</sub>)]·4H<sub>2</sub>O polyoxometalates on the surface of Fe<sub>3</sub>O<sub>4</sub>/Ag (core−shell) nanoparticles. The transmission electron microscopy/high resolution transmission electron microscopy (HR-TEM) and X-ray powder diffraction (XRD) analyses show that the Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs ternary nanocomposites reveal a core−shell−core nanostructure, good dispersibility, and high crystallinity. The vibrating sample magnetometer (VSM) and physical property measurement system (PPMS) demonstrated the good magnetic properties and superparamagnetic behavior of the nanocomposites at 300 K. The UV−vis spectroscopy displayed the broadband absorption of the Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs with the maximum surface plasmon resonance of Ag nanostructure around 420 nm. The dye removal capacity of Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs was investigated using methylene blue (MB) as a probe. Through adsorption and photocatalysis, the nanocomposites could quickly remove MB with a removal efficiency of 98.7% under the irradiation of visible light at room temperature. The removal efficiency was still as high as 97.5% even after six runs by magnetic separation of photocatalytic adsorbents after processing, indicating the reusability and high stability of the nanocomposites. These Fe<sub>3</sub>O<sub>4</sub>/Ag/POMs photocatalytic adsorbents with magnetic properties will hopefully become a functional material for wastewater treatment in the future.
topic	ternary nanocomposites magnetic–opto properties dye removal
url	https://www.mdpi.com/2079-4991/9/9/1255
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Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe<sub>3</sub>O<sub>4</sub>/Ag/Polyoxometalates Ternary Nanocomposites

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