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Journal of Chemistry
Volume 2017, Article ID 5045973, 18 pages
https://doi.org/10.1155/2017/5045973
Research Article

Synthesis of Iron Doped Zeolite Imidazolate Framework-8 and Its Remazol Deep Black RGB Dye Adsorption Ability

1College of Science, Hue University, Hue City 530000, Vietnam
2Faculty of Physics-Chemistry-Biology, Quang Nam University, Tam Ky 560000, Vietnam
3Faculty of Natural Science, Phu Yen University, Phu Yen 620000, Vietnam
4Faculty of Technology, Industrial University of Ho Chi Minh City, Quang Ngai Campus, Quang Ngai City 570000, Vietnam
5Faculty of Natural Science, Thu Dau Mot University, Thu Dau Mot City 820000, Vietnam
6Department of Chemistry, Quy Nhon University, Quy Nhon City 590000, Vietnam

Correspondence should be addressed to Dinh Quang Khieu; nv.ude.inueuh@ueihkqd

Received 8 February 2017; Revised 20 March 2017; Accepted 28 March 2017; Published 4 May 2017

Academic Editor: Wenshan Guo

Copyright © 2017 Mai Thi Thanh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Zeolite imidazole framework-8 (ZIF-8) and the iron doped ZIF-8 (Fe-ZIF-8) were synthesized by the hydrothermal process. The obtained materials were characteristic of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), nitrogen adsorption/desorption isotherms, and atomic absorption spectroscopy (AAS). The results showed that the obtained Fe-ZIF-8 possessed the ZIF-8 structure with a large specific area. ZIF-8 and Fe-ZIF-8 were used for the removal of Remazol Deep Black (RDB) RGB dye from aqueous solutions. The various factors affecting adsorption such as pH, initial concentration, contact time, and temperature were investigated. The results showed that the introduction of iron into ZIF-8 provided a much larger adsorption capacity and faster adsorption kinetics than ZIF-8 without iron. The electrostatic interaction and π-π interaction between the aromatic rings of the RDB dye and the aromatic imidazolate rings of the adsorbent were responsible for the RDB adsorption. Moreover, the coordination of the nitrogen atoms and oxygen in carboxyl group in RDB molecules with the Fe2+ ions in the ZIF-8 framework played a vital role for the effective removal of RDB from aqueous solution.