Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation

A superhydrophobic macroporous material composed of hollow hemispherical MXene (HSMX) was synthesized by the thermal annealing of MXene-wrapped cationic polystyrene spheres (CPS@MXene). Notably, the spherical MXene shells exhibited highly efficient catalysis of the carbonization of CPS into carbon n...

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Autores principales:	Haoran Chen, Riyuan Wang, Weiming Meng, Fanglin Chen, Tao Li, Dingding Wang, Chunxiang Wei, Hongdian Lu, Wei Yang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	MXene polystyrene template superhydrophobicity water-in-oil emulsion separation Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/9ddf924f8e39496e97b6266a69a51aad
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spelling	oai:doaj.org-article:9ddf924f8e39496e97b6266a69a51aad2021-11-25T18:30:27ZThree-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation10.3390/nano111128662079-4991https://doaj.org/article/9ddf924f8e39496e97b6266a69a51aad2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2866https://doaj.org/toc/2079-4991A superhydrophobic macroporous material composed of hollow hemispherical MXene (HSMX) was synthesized by the thermal annealing of MXene-wrapped cationic polystyrene spheres (CPS@MXene). Notably, the spherical MXene shells exhibited highly efficient catalysis of the carbonization of CPS into carbon nanoparticles. Their insertion into the interlayer of MXene increased the d-spacing and created hollow hemispheres. The as-prepared HSMX with nanoscale walls had a lower packing density than MXene, but higher porosity, total pore volume, and total pore area. Moreover, the stacking of hollow hemispheres promoted the formation of a highly undulating macroporous surface and significantly improved the surface roughness of the HSMX-based 3D membrane, resulting in superhydrophobicity with a water contact angle of 156.4° and a rolling angle of 6°. As a result, the membrane exhibited good separation efficiency and <i>Flux</i> for emulsifier-stabilized water-in-paraffin liquid emulsions, which was dependent on its superhydrophobic performance and strong demulsification ability derived from the razor effect originating from the ultrathin walls of HSMX. This work provides a facile approach for the transformation of highly hydrophilic 2D MXene into superhydrophobic 3D HSMX, and opens a new pathway for the development of advanced MXene-based materials for environmental remediation applications.Haoran ChenRiyuan WangWeiming MengFanglin ChenTao LiDingding WangChunxiang WeiHongdian LuWei YangMDPI AGarticleMXenepolystyrene templatesuperhydrophobicitywater-in-oil emulsion separationChemistryQD1-999ENNanomaterials, Vol 11, Iss 2866, p 2866 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	MXene polystyrene template superhydrophobicity water-in-oil emulsion separation Chemistry QD1-999
spellingShingle	MXene polystyrene template superhydrophobicity water-in-oil emulsion separation Chemistry QD1-999 Haoran Chen Riyuan Wang Weiming Meng Fanglin Chen Tao Li Dingding Wang Chunxiang Wei Hongdian Lu Wei Yang Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
description	A superhydrophobic macroporous material composed of hollow hemispherical MXene (HSMX) was synthesized by the thermal annealing of MXene-wrapped cationic polystyrene spheres (CPS@MXene). Notably, the spherical MXene shells exhibited highly efficient catalysis of the carbonization of CPS into carbon nanoparticles. Their insertion into the interlayer of MXene increased the d-spacing and created hollow hemispheres. The as-prepared HSMX with nanoscale walls had a lower packing density than MXene, but higher porosity, total pore volume, and total pore area. Moreover, the stacking of hollow hemispheres promoted the formation of a highly undulating macroporous surface and significantly improved the surface roughness of the HSMX-based 3D membrane, resulting in superhydrophobicity with a water contact angle of 156.4° and a rolling angle of 6°. As a result, the membrane exhibited good separation efficiency and <i>Flux</i> for emulsifier-stabilized water-in-paraffin liquid emulsions, which was dependent on its superhydrophobic performance and strong demulsification ability derived from the razor effect originating from the ultrathin walls of HSMX. This work provides a facile approach for the transformation of highly hydrophilic 2D MXene into superhydrophobic 3D HSMX, and opens a new pathway for the development of advanced MXene-based materials for environmental remediation applications.
format	article
author	Haoran Chen Riyuan Wang Weiming Meng Fanglin Chen Tao Li Dingding Wang Chunxiang Wei Hongdian Lu Wei Yang
author_facet	Haoran Chen Riyuan Wang Weiming Meng Fanglin Chen Tao Li Dingding Wang Chunxiang Wei Hongdian Lu Wei Yang
author_sort	Haoran Chen
title	Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
title_short	Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
title_full	Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
title_fullStr	Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
title_full_unstemmed	Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation
title_sort	three-dimensional superhydrophobic hollow hemispherical mxene for efficient water-in-oil emulsions separation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9ddf924f8e39496e97b6266a69a51aad
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Three-Dimensional Superhydrophobic Hollow Hemispherical MXene for Efficient Water-in-Oil Emulsions Separation

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