期刊
ADVANCED MATERIALS RESEARCH II, PTS 1 AND 2
卷 463-464, 期 -, 页码 543-+出版社
TRANS TECH PUBLICATIONS LTD
DOI: 10.4028/www.scientific.net/AMR.463-464.543
关键词
hydroxyapatite; meso-silica; core-shell structure; methylene blue; adsorption
资金
- doctoral research fund of Shandong University of Technology [406017]
- Science & Technology Plan of the Education Department of Shandong Province [J11LD52]
- Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences [JJ-10-03]
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 m(2).g(-1) and 0.36 cm(3).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.
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