Open AccessPhysicochemical properties of TiO2/Hydroxyapatite nanocomposite
Author(s) -
Linh Thi Truc Nguyen,
Truong Khoa Phan,
Dzung Van Nguyen
Publication year - 2013
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v16i3.1613
Subject(s) - nanocomposite , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , materials science , titanium , chemical engineering , binding energy , phase (matter) , precipitation , band gap , nuclear chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , physics , optoelectronics , meteorology , nuclear physics , engineering
The TiO2/Hydroxyapatite (TiO2/HAp) nanocomposites with different ratios were prepared by precipitation of hydroxyapatite in the presence of TiO2 or TiO(OH)2. The physicochemical properties of TiO2/HAp material were characterized using the batch equilibration method and BET, XPS, DRS, FTIR analyses. The XPS result showed that binding energy of Ca-P was 347.2eV, that of P-OH was 133.3eV and the Ti 2p spectrum could be resolved into two spin-orbit pairs 2p3/2 and 2p1/2 with binding energies of 458.6 and 464.1 eV, respectively, which are the characteristics of titanium(IV) in TiO2. The FTIR result suggested that the formation of the TiO2/HAp nanocomposites have not changed the structure nor the phase of the hydroxyapatite crystals. However, the physicochemical properties of TiO2/HAp nanocomposites such as pHpzc values, band gap energy, specific surface area and pore volume were higher than those of pure TiO2 and HAp.