American Chemical Science Journal, ISSN: 2249-0205,Vol.: 16, Issue.: 4
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.
Sema Salgın1*, Uğur Salgın1 and Mehmet Ayluçtarhan1
1Department of Chemical Engineering, Faculty of Engineering, Cumhuriyet University, Sivas, Turkey.
(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
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.
β-cyclodextrin nanosphere; epichlorohydrin; p-nitrofenol; adsorption.
Full Article - PDF Page 1-10
DOI : 10.9734/ACSJ/2016/29198Review History Comments