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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
Published on: February 23, 2017
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Surface protolytic property characterization of hydroxyapatite and titanium dioxide nanoparticles
Ekaterina Kukleva1, Petra Suchánková1, Karel Štamberg1
1Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Nuclear Chemistry Břehová 7 11519 Prague 1 Czech Republic jan.kozempel@fjfi.cvut.cz.
RSC Advances
|May 6, 2022
Summary
This study characterizes hydroxyapatite (nHAP) and titanium dioxide (nTiO2) nanoparticles for ion sorption applications. Titanium dioxide nanoparticles show wider applicability due to stability, while nHAP has limited use due to dissolution.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Science
Background:
- Nanoparticles like hydroxyapatite (nHAP) and titanium dioxide (nTiO2) are explored for ion sorption.
- Applications include targeted therapy, waste repository barriers, and photovoltaics.
- Understanding surface chemistry is crucial for optimizing their use.
Purpose of the Study:
- To characterize nHAP and nTiO2 nanoparticles for ion sorption.
- Determine protonation and ion exchange constants and site densities.
- Provide data for future radionuclide (Ra) kinetics and sorption experiments.
Main Methods:
- Characterization through titration experiments measuring agent consumption versus pH.
- Evaluation of titration curves using the Chemical Equilibrium Model (CEM) and Ion Exchange Model (IExM).
Main Results:
- The CEM and IExM combination best fitted the experimental titration curves.
- Significant differences in sorption properties were observed between nHAP and nTiO2.
- nTiO2 exhibits broader applicability due to stability across a wide pH range and available surface sites.
- nHAP shows limited applicability due to dissolution below pH 5.
Conclusions:
- Both nHAP and nTiO2 can sorb cationic species on deprotonated sites.
- nTiO2 is a promising material for diverse sorption and decontamination applications.
- nHAP's utility is constrained by its pH-dependent stability.
