Block-copolymer-assisted synthesis of hydroxyapatite nanoparticles with high surface area and uniform size
- 1. Department of Bioenvironmental Engineering and R and D Center for Membrane Technology, Chung Yuan Christian University, No. 200, Chung Pei Road, Chung Li 32023, Taiwan (China)
- 2. World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science - NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
- 3. Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan (China)
Description
We report the synthesis of hydroxyapatite nanoparticles (HANPs) by the coprecipitation method using calcium D-gluconate and potassium hydrogen phosphate as the sources of calcium and phosphate ions, respectively, and the triblock copolymer F127 as a stabilizer. The HANPs were characterized using scanning electron microscopy, x-ray diffraction, and nitrogen adsorption/desorption isotherms. Removal of F127 by solvent extraction or calcination alters the structure of HANPs. The solvent-extracted HANPs were single crystals with their (001) axis oriented along the rod axis of the HANP, whereas the calcined HANPs contained two crystal phases that resulted in a spherical morphology. The calcined HANPs had much higher surface area (127 m2 g-1) than the solvent-extracted HANPs (44 m2 g-1).
Availability note (English)
Available from http://dx.doi.org/10.1088/1468-6996/12/4/045005Additional details
Identifiers
Publishing Information
- Journal Title
- Science and Technology of Advanced Materials
- Journal Volume
- 12
- Journal Issue
- 4
- Journal Page Range
- [6 p.]
- ISSN
- 1468-6996
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43012869
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ADSORPTION; APATITES; CALCINATION; CALCIUM; COPOLYMERS; COPRECIPITATION; DESORPTION; MONOCRYSTALS; MORPHOLOGY; NANOSTRUCTURES; NITROGEN; PARTICLES; PHOSPHATES; PHOSPHORIC ACID; POTASSIUM; SCANNING ELECTRON MICROSCOPY; SOLVENT EXTRACTION; SURFACE AREA; SYNTHESIS; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALI METALS; ALKALINE EARTH METALS; CHEMICAL REACTIONS; COHERENT SCATTERING; CRYSTALS; DECOMPOSITION; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; EXTRACTION; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; METALS; MICROSCOPY; MINERALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PHOSPHATE MINERALS; PHOSPHORUS COMPOUNDS; POLYMERS; PRECIPITATION; PYROLYSIS; SCATTERING; SEPARATION PROCESSES; SORPTION; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES