Abstract
Water-insoluble β-cyclodextrin polymer (β-CDP) crosslinked by citric acid was obtained with a yield of 65% through an environment friendly synthesis procedure. FT-IR spectra disclosed that the hydroxyl groups of β-CD had reacted and condensated with the carboxyl groups of citric acid, and at the same time the structural characteristics of β-CD were essentially maintained in β-CDP. The β-CDP exhibited notable adsorption capability toward phenol (q max = 13.8 mg g−1) and especially large adsorption capability toward methylene blue (q max = 105 mg g−1). The concentration of methylene blue in water could be reduced to 0.11 mg L−1 by the β-CDP, indicating the excellent adsorption sensitivity of β-CDP toward methylene blue. The adsorption results disclosed that the interior cavity and inclusion property of β-CD were maintained in the synthesized β-CDP.
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We gratefully acknowledge the support of the Natural Science Foundation of Henan Province, China. We sincerely thank Mr. Zhenbang Tian, Mr. Baofeng Sha and Ms. Xiaozhuan Zhang for their valuable advices and assistances in the experiments and discussions.
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Zhao, D., Zhao, L., Zhu, CS. et al. Water-insoluble β-cyclodextrin polymer crosslinked by citric acid: synthesis and adsorption properties toward phenol and methylene blue. J Incl Phenom Macrocycl Chem 63, 195–201 (2009). https://doi.org/10.1007/s10847-008-9507-4
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DOI: https://doi.org/10.1007/s10847-008-9507-4