Mechanisms of competitive adsorption organic pollutants on hexylene-bridged polysilsesquioxane

De Rong Lin, Li Jiang Hu, Bao Shan Xing, Hong You, Douglas A Loy

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Hexylene-bridged periodic mesoporous polysilsesquioxanes (HBPMS) are a promising new class of adsorbent for the removal of organic contaminants from aqueous solutions. These hybrid organic-inorganic materials have a larger BET surface area of 897 m2 · g-1 accessible through a cubic, isotropic network of 3.82-nm diameter pores. The hexylene bridging group provides enhanced adsorption of organic molecules while the bridged polysilsesquioxane structure permits sufficient silanols that are hydrophilic to be retained. In this study, adsorption of phenanthrene (PHEN), 2,4-Dichlorophenol (DCP), and nitrobenzene (NBZ) with HBPMS materials was studied to ascertain the relative contributions to adsorption performance from (1) direct competition for sites and (2) pore blockage. A conceptual model was proposed to further explain the phenomena. This study suggests a promising application of cubic mesoporous BPS in wastewater treatment.

Original languageEnglish (US)
Pages (from-to)5806-5817
Number of pages12
JournalMaterials
Volume8
Issue number9
DOIs
Publication statusPublished - 2015

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Keywords

  • Competition adsorption sites
  • Competitive adsorption
  • Hexylene bridged polysilsesquioxane
  • Organic pollutants
  • Pore blockage

ASJC Scopus subject areas

  • Materials Science(all)

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