Details

Autor(en) / Beteiligte

• Li, Xiaojian
• Han, Lei
• Huang, Zhong
• Li, Zhi
• Li, Faliang
• Duan, Hongjuan
• Huang, Liang
• Jia, Quanli
• Zhang, Haijun
• Zhang, Shaowei

Titel

A robust air superhydrophilic/superoleophobic diatomite porous ceramic for high-performance continuous separation of oil-in-water emulsion

Ist Teil von

• Chemosphere (Oxford), 2022-09, Vol.303 (Pt 1), p.134756-134756, Article 134756

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Three-dimensional (3D) porous architecture has attracted considerable attention in remediation of oil/water emulsion. In present work, an air superhydrophilic/superoleophobic diatomite porous ceramic (AS-DC) was prepared, using SiO2 whiskers modified diatomite ceramic as the substrate and FS-50 as the modifier. The interconnected SiO2 whiskers intertwined on the skeleton of ceramic block forming a 3D network structure, which not only improved the wettability of AS-DC, but also reinforced its mechanical property (about 2.5 MPa of compressive strength). The as-prepared AS-DC with intrinsically superoleophobicity (154°) and superhydrophilicity (0°) exhibited an underwater oil contact angle of 161°, suggesting a multifunctional separation capability. By simply assembling AS-DC with pipes and a pump, it could not only separate the surfactant-stabilized oil-in-water emulsion in a permeation flux as high as 107.8 kg min−1 m−2 with a selectivity of >95%, but also collect the clean water from the floating oil/water mixture in a flux of 197.4 kg min−1 m−2 and a selectivity of ∼99%. In addition, the AS-DC was resistant to the salt/acid/alkaline corrosion and temperature fluctuation. The mechanical/chemical firmness of AS-DC renders it tremendous potential as a robust 3D architecture in real application for purification of oil/water mixture. The present work designs a robust 3D porous architecture with intrinsically superoleophobicity and superhydrophilicity, which can on-site separate both the surfactant-stabilized oil-in-water emulsion and the floating oil/water mixture, providing an inexpensive yet efficient stragegy for practical water purification. [Display omitted] •An air superhydrophilic ceramic is designed for remediation of oily water.•As-prepared ceramic exhibits a compressive strength of ∼2.5 MPa.•It is resistant to the salt/acid/alkaline corrosion and temperature change.•It can separate both oil-in-water emulsion and floating oil/water mixture.