Synthesis of Novel Core-Shell Structured Hydroxyapatite/Meso-Silica for Removal of Methylene Blue from Aqueous Solutions

Abstract:

Core-shell structured hydroxyapatite (HA)/meso-silica was prepared and used as absorbance of methylene blue (MB). HA/meso-silica was synthesized in three steps: preparation of nano-sized HA by wet precipitation method, coating of dense silica and deposition of meso-silica shell on HA. As-received samples were characterized by Fourier transformed infare spectra, small angle X-ray diffraction, nitrogen adsorption-desorption isotherm and transmission electron microscopy. A wormhole framework mesostructure was found for HA/meso-silica. The specific surface area and pore volume were 128 m2•g-1 and 0.36 cm3•g-1, respectively. From the adsorption isotherm, HA/meso-silica with the great specific surface area exhibited a prominent adsorption capacity of MB (134.0 mg/g) in comparison with bare HA (0 mg/g). This study might shed light on surface modification of conventional low-cost adsorbents for removal of organic pollutants from aqueous solutions.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 543-547
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.543
• Online since: February 2012
• Authors: Cheng Feng Li, Xiao Lu Ge, Shu Guang Liu, Fei Yu Liu
• Keywords: Adsorption, Core-Shell Structure, Hydroxyapatite (HAP), Meso-Silica, Methylene Blue (MB)

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