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Indexed by:期刊论文

Date of Publication:2013-02-07

Journal:JOURNAL OF MATERIALS CHEMISTRY A

Included Journals:SCIE、EI、Scopus

Volume:1

Issue:5

Page Number:1701-1708

ISSN No.:2050-7488

Abstract:A hierarchically porous monolith with macro-and meso-pores was synthesized via a sol-gel and phase separation process. Due to the surface modification by organic silanes, the wettability of the silica material was effectively controlled. A series of hydrophobic porous silica monoliths (HPSM) were obtained. Using a "reverse membrane emulsification" process, the HPSM not only cleared oil away from water, but also broke the micro-emulsion efficiently, even when emulsion stabilizer was in the system. As the filtration layer, 1.0 g of HPSM could treat 944 mL of oil containing water or 667 mL of surfactant-stabilized micro-emulsion. HPSM materials could remove at maximum 96.5% of the oil in water and 100% surfactant in the micro-emulsion. In addition, the material could be reused through a simple treatment. The excellent separating effect was kept even after 8 times of regeneration. Special selectivity, easy operation and excellent recyclability make the material have great potential for practical application.