Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2016-03-01

Journal: ACS SUSTAINABLE CHEMISTRY & ENGINEERING

Included Journals: Scopus、EI、SCIE

Volume: 4

Issue: 3

Page Number: 992-998

ISSN: 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.