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Indexed by:期刊论文

Date of Publication:2016-03-01

Journal:ACS SUSTAINABLE CHEMISTRY & ENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:4

Issue:3

Page Number:992-998

ISSN No.:2168-0485

Key Words:Pyrogallol; Porous silica; Adsorption; Organic contaminant; Heavy metal ions

Abstract:Simulating the polymerization of polyphenol on a solid surface in nature, hybrid adsorbents were prepared by coating the hierarchically porous silica (HPS) with a poly(pyrogallol) (PG) layer. Such material has a macroporous skeleton and well-defined mesopores. During a facile and mild reaction, the poly-PG membrane is strongly binded to the pore surface of HPS through covalent and noncovalent interactions. High-performance adsorbents, HPS/PG, was obtained. It exhibits a large capability to adsorb various pollutants in wastewater, such as heavy metal ions (Hg2+, N2+, Cu2+, Ni2+, and CrO42-) organic dyes, and pesticides. Specifically, HPS/PG showed a good purifying capacity toward the Hg2+ ion and neutral red, which could reach 157.2 and 671.1 mg g(-1), respectively. More than that, HPS/PG showed a good recovering ability with simulated wastewater with complex components. The removal rate for any of the pollutants was more than 98%. The high adsorption capability of HPS/PG should be due to the hierarchically porous structure and ideal surface coating, which combine the benefits of both physical and chemical adsorptions.