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American Chemical Science Journal, ISSN: 2249-0205,Vol.: 16, Issue.: 4

Original-research-article

Synthesis of β-Cyclodextrin-Epichlorohydrin Nanospheres: Its Application for Removal of p-nitrophenol

 

Sema Salgın1*, Uğur Salgın1 and Mehmet Ayluçtarhan1

1Department of Chemical Engineering, Faculty of Engineering, Cumhuriyet University, Sivas, Turkey.

Article Information
Editor(s):
(1) Anonymous.
Reviewers:
(1) Maurizio D'Auria, Università della Basilicata, Potenza, Italy.
(2) Xiaoquan Lu, Northwest Normal University, Lanzhou, China.
(3) Silvia Álvarez Torrellas, Complutense University, Madrid, Spain.
Complete Peer review History: http://www.sciencedomain.org/review-history/16281

Abstracts

The aim of this work is to investigate synthesis conditions of water insoluble β-cyclodextrin (β-CD) nanospheres that could be useful as an adsorbent to remove very low concentration of p-nitrophenol (p-NP) from water. The effect of several parameters on β-CD polymer synthesis such as β-CD/epichlorohydrin (EPI) mole ratio, reaction temperature and NaOH concentration was investigated. The FTIR-ATR analysis confirmed the formation of β-CD polymer structure with the addition of EPI by preserving the basic β-CD structural units. To determine the optimal synthesis conditions, performances of the synthesized β-CD nanospheres were determined by measuring the adsorption efficiencies of p-NP. On the basis of these results, the optimal synthesis conditions of β-CD nanospheres were 65°C, 40% NaOH (w/w) concentration and β-CD/EPI=1/55 mole ratio. Langmuir and Freundlich isotherm models were fitted on experimental data. It was found that Langmuir model described best for adsorption of p-NP onto β-CD nanospheres. On the basis of the Langmuir analysis, the maximum adsorption capacities were determined to be 17.203 mg p-NP per gram of β-CD nanospheres. The β-CD nanospheres at predetermined optimum reaction conditions were also characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Brunauer-Emmet-Teller (BET) analysis. The combination of results from SEM,TEM and BET indicated that the synthesized β-CD nanospheres have a porous and sponge-like structure and 1.54 m2/g specific surface area.

Keywords :

β-cyclodextrin nanosphere; epichlorohydrin; p-nitrofenol; adsorption.

Full Article - PDF    Page 1-10

DOI : 10.9734/ACSJ/2016/29198

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