Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye

Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye

Well-designed composite catalysts are of increasing concern due to their improved performance compared to individual components. Herein, we designed and synthesized an Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> composite via a simple hydrothermal method. As for t...

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Autores principales: Chi Zhou, Wencheng Liu, Hanqing Li, Miao Yang, Zixin Yang
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
MoS<sub>2</sub>
Fe<sub>3</sub>O<sub>4</sub>
piezo-catalyst
dye
degradation
Chemical technology
TP1-1185
Chemistry
QD1-999
Acceso en línea:https://doaj.org/article/79dffb21185d4b21b9507e8eee9d6217
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spelling oai:doaj.org-article:79dffb21185d4b21b9507e8eee9d62172021-11-25T17:06:50ZSeparable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye10.3390/catal111114032073-4344https://doaj.org/article/79dffb21185d4b21b9507e8eee9d62172021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1403https://doaj.org/toc/2073-4344Well-designed composite catalysts are of increasing concern due to their improved performance compared to individual components. Herein, we designed and synthesized an Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> composite via a simple hydrothermal method. As for the resultant composite, the MoS<sub>2</sub> nanolayers presented a novel piezo-catalytic effect, while the Fe<sub>3</sub>O<sub>4</sub> core provided a magnetic separation property. The structure and properties of Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> were determined by relevant experiments. It was found that Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> exhibited enhanced piezo-catalytic degradation of rhodamine B and good magnetic recovery/recycling features. The <i>k</i><sub>obs</sub> for rhodamine B degradation over Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> was 0.019 min<sup>−1</sup>—a little longer than that over MoS<sub>2</sub> (0.013 min<sup>−1</sup>). Moreover, Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> also showed a favorable ability to adsorb rhodamine B in solution, with a saturation adsorption of 26.8 mg/g. Further studies revealed that piezo-electrons, holes, and superoxide anions were key species in the piezo-catalytic degradation of rhodamine B. Notably, the step where oxygen trapped electrons to produce superoxide anions had a significant impact on the degradation of the dye. This work, not limited to the development of a high-performance MoS<sub>2</sub>-based piezo-catalyst, is expected to provide new insights into the working mechanisms and process profiles of composite piezo-catalysts.Chi ZhouWencheng LiuHanqing LiMiao YangZixin YangMDPI AGarticleMoS<sub>2</sub>Fe<sub>3</sub>O<sub>4</sub>piezo-catalystdyedegradationChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1403, p 1403 (2021)
institution DOAJ
collection DOAJ
language EN
topic MoS<sub>2</sub>
Fe<sub>3</sub>O<sub>4</sub>
piezo-catalyst
dye
degradation
Chemical technology
TP1-1185
Chemistry
QD1-999
spellingShingle MoS<sub>2</sub>
Fe<sub>3</sub>O<sub>4</sub>
piezo-catalyst
dye
degradation
Chemical technology
TP1-1185
Chemistry
QD1-999
Chi Zhou
Wencheng Liu
Hanqing Li
Miao Yang
Zixin Yang
Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
description Well-designed composite catalysts are of increasing concern due to their improved performance compared to individual components. Herein, we designed and synthesized an Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> composite via a simple hydrothermal method. As for the resultant composite, the MoS<sub>2</sub> nanolayers presented a novel piezo-catalytic effect, while the Fe<sub>3</sub>O<sub>4</sub> core provided a magnetic separation property. The structure and properties of Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> were determined by relevant experiments. It was found that Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> exhibited enhanced piezo-catalytic degradation of rhodamine B and good magnetic recovery/recycling features. The <i>k</i><sub>obs</sub> for rhodamine B degradation over Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> was 0.019 min<sup>−1</sup>—a little longer than that over MoS<sub>2</sub> (0.013 min<sup>−1</sup>). Moreover, Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> also showed a favorable ability to adsorb rhodamine B in solution, with a saturation adsorption of 26.8 mg/g. Further studies revealed that piezo-electrons, holes, and superoxide anions were key species in the piezo-catalytic degradation of rhodamine B. Notably, the step where oxygen trapped electrons to produce superoxide anions had a significant impact on the degradation of the dye. This work, not limited to the development of a high-performance MoS<sub>2</sub>-based piezo-catalyst, is expected to provide new insights into the working mechanisms and process profiles of composite piezo-catalysts.
format article
author Chi Zhou
Wencheng Liu
Hanqing Li
Miao Yang
Zixin Yang
author_facet Chi Zhou
Wencheng Liu
Hanqing Li
Miao Yang
Zixin Yang
author_sort Chi Zhou
title Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
title_short Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
title_full Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
title_fullStr Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
title_full_unstemmed Separable Magnetic Fe<sub>3</sub>O<sub>4</sub>@MoS<sub>2</sub> Composite for Adsorption and Piezo-Catalytic Degradation of Dye
title_sort separable magnetic fe<sub>3</sub>o<sub>4</sub>@mos<sub>2</sub> composite for adsorption and piezo-catalytic degradation of dye
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/79dffb21185d4b21b9507e8eee9d6217
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AT hanqingli separablemagneticfesub3subosub4submossub2subcompositeforadsorptionandpiezocatalyticdegradationofdye
AT miaoyang separablemagneticfesub3subosub4submossub2subcompositeforadsorptionandpiezocatalyticdegradationofdye
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