Photocatalytic properties and controlled morphologies of TiO2-modified hydroxyapatite synthesized by the urea-assisted hydrothermal method

Because hydroxyapatite (HAp) shows the unique adsorption property, we speculate that HAp is a suitable catalyst supports. In this study, TiO2 nanoparticles are dispersed on HAp (TiO2-modified HAp) that was synthesized by hydrothermal treatment using urea. Using acid fuchsin (AF), the photocatalytic...

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Bibliographic Details
Published in:Powder technology 2020-08, Vol.373, p.468-475
Main Authors: Goto, Tomoyo, Shin, Jeehoon, Yokoi, Taishi, Cho, Sung Hun, Sekino, Tohru
Format: Article
Language:English
Subjects:
Adsorption
Catalysts
Crystals
Decoloring
Decolorization
Hydrothermal crystal growth
Hydrothermal synthesis
Hydrothermal treatment
Hydroxyapatite
Morphology
Nanoparticles
Photocatalysis
Photocatalyst
Properties (attributes)
Synthesis
Titanium dioxide
Titanium oxide
Urea
Ureas
Zeta potential
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Summary:Because hydroxyapatite (HAp) shows the unique adsorption property, we speculate that HAp is a suitable catalyst supports. In this study, TiO2 nanoparticles are dispersed on HAp (TiO2-modified HAp) that was synthesized by hydrothermal treatment using urea. Using acid fuchsin (AF), the photocatalytic decolouration and adsorption tests were performed to investigate the effects of HAp characteristics and compositions. The morphology of HAp was changed from needle- to sponge-shaped by increasing the urea concentration. Concurrently, the TiO2 nanoparticle formed on the HAp. The photocatalytic decolouration rate of TiO2-modifed HAp with sponge-shaped crystals, which shows a high surface area and high zeta potential, was slightly higher than the rate in the presence of needle-shaped crystals. Therefore, this study discusses the effects of the HAp morphology and TiO2 nanoparticle count properties that influences adsorption properties. This information can be used to produce more efficient adsorption materials and processes. [Display omitted] •HAp crystal shows unique adsorption properties.•Adsorption and decoloration tests inform characteristics.•HAp morphology and TiO2 nanoparticle count affect the adsorption properties.•Catalyst support selection is a key decision in material design.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2020.06.062