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      Cyclodextrin-functionalized mesostructured silica nanoparticles for removal of polycyclic aromatic hydrocarbons

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      Embargo Lift Date: 2019-07-01
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      Author(s)
      Topuz, F.
      Uyar, T.
      Date
      2017
      Source Title
      Journal of Colloid and Interface Science
      Print ISSN
      0021-9797
      Electronic ISSN
      1095-7103
      Publisher
      Academic Press Inc.
      Volume
      497
      Pages
      233 - 241
      Language
      English
      Type
      Article
      Item Usage Stats
      211
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      353
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      Abstract
      Polycyclic aromatic hydrocarbons (PAHs) are the byproducts of the incomplete combustion of carbon-based fuels, and have high affinity towards DNA strands, ultimately exerting their carcinogenic effects. They are ubiquitous environmental contaminants, and can accumulate on tissues due to their lipophilic nature. In this article, we describe a novel concept for PAH removal from aqueous solutions using cyclodextrin-functionalized mesostructured silica nanoparticles (CDMSNs) and pristine mesostructured silica nanoparticles (MSNs). The adsorption applications of MSNs are greatly restricted due to the absence of surface functional groups on such particles. In this regard, cyclodextrins can serve as ideal functional molecules with their toroidal, cone-type structure, capable of inclusion-complex formation with many hydrophobic molecules, including genotoxic PAHs. The CDMSNs were synthesized by the surfactant-templated, NaOH-catalyzed condensation reactions of tetraethyl orthosilicate (TEOS) in the presence of two different types of cyclodextrin (i.e. hydroxypropyl-β-cyclodextrin (HP-β-CD) and native β-cyclodextrin (β-CD)). The physical incorporation of CD moieties was supported by XPS, FT-IR, NMR, TGA and solid-state 13C NMR. The CDMSNs were treated with aqueous solutions of five different PAHs (e.g. pyrene, anthracene, phenanthrene, fluorene and fluoranthene). The functionalization of MSNs with cyclodextrin moieties significantly boosted the sorption capacity (q) of the MSNs up to ∼2-fold, and the q ranged between 0.3 and 1.65 mg per gram CDMSNs, of which the performance was comparable to that of the activated carbon.
      Keywords
      Cyclodextrin
      Mesostructured silica nanoparticles (MSN)
      Polycyclic aromatic hydrocarbons (PAH)
      Water treatment
      Activated carbon
      Activated carbon treatment
      Adsorption
      Anthracene
      Aromatic compounds
      Aromatic hydrocarbons
      Aromatization
      Byproducts
      Condensation reactions
      Cyclodextrins
      Hydrocarbons
      Molecules
      Nanoparticles
      Silica
      Solutions
      Water treatment
      Environmental contaminant
      Hydrophobic molecules
      Incomplete combustion
      Mesostructured silica
      Polycyclic aromatic hydrocarbon (PAH)
      Polycyclic aromatic hydrocarbons (PAHS)
      Surface functional groups
      Tetraethyl orthosilicates
      Polycyclic aromatic hydrocarbons
      Anthracene
      Beta cyclodextrin
      Cyclodextrin
      Fluoranthene
      Fluorene
      Phenanthrene
      Polycyclic aromatic hydrocarbon
      Pyrene
      Silica nanoparticle
      Tetraethoxysilane
      Cyclodextrin
      Metal nanoparticle
      Polycyclic aromatic hydrocarbon
      Silicon dioxide
      Adsorption
      Aqueous solution
      Article
      Carbon nuclear magnetic resonance
      Chemical structure
      Complex formation
      Hydrophobicity
      Infrared spectroscopy
      Nuclear magnetic resonance
      Polymerization
      Priority journal
      Thermogravimetry
      Water treatment
      Chemistry
      Isolation and purification
      Adsorption
      Cyclodextrins
      Metal nanoparticles
      Polycyclic aromatic hydrocarbons
      Silicon dioxide
      Permalink
      http://hdl.handle.net/11693/37369
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.jcis.2017.03.015
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
      • Nanotechnology Research Center (NANOTAM) 1125
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