H.M.T.G.A. Pitawala
University of Peradeniya
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Publication
Featured researches published by H.M.T.G.A. Pitawala.
RSC Advances | 2017
W.P.S.L. Wijesinghe; M.M.M.G.P.G. Mantilaka; R.M.G. Rajapakse; H.M.T.G.A. Pitawala; T. N. Premachandra; H.M.T.U. Herath; R. P. V. J. Rajapakse; K. G. Upul Wijayantha
Hydroxyapatite (HA) nanoparticles are heavily used materials in biomedical applications. Therefore, identification of cheap and readily available raw-materials for the synthesis of HA nanoparticles is very important to fulfill the current demand. Herein, for the first time, we have developed a novel method to convert readily available, extensively distributed, naturally occurring apatites into nontoxic hydroxyapatite nanoparticles for biomedical applications. In this method, powdered apatite is digested and combusted to produce calcium phosphate nanoparticles and hydrothermally treated to convert them into high purity HA. HA nanoparticles are characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Synthesized HA nanoparticles are nontoxic according to the cytotoxicity results which confirm their potential usage in biomedical applications. Therefore, this method is very important to fulfill the current demand of HA nanoparticles and for value-addition to natural apatite.
New Journal of Chemistry | 2018
W.P.S.L. Wijesinghe; M.M.M.G.P.G. Mantilaka; T. A. Nirmal Peiris; R.M.G. Rajapakse; K. G. Upul Wijayantha; H.M.T.G.A. Pitawala; T. N. Premachandra; H.M.T.U. Herath; R. P. V. J. Rajapakse
Mesoporous hydroxyapatite (MPHA) particles have recently gained a great deal of interest in a broad range of fields including biomedical fields, wastewater treatment and catalysis. In this paper, we describe a novel and convenient route to synthesise MPHA particles using calcium carbonate nanoparticle templates for the formation of mesopores in HA. In this method, both nano-CaCO3 templates and HA are prepared simultaneously using calcium sucrate as a precursor by allowing the nano-CaCO3 to embed in HA. Mesopores in HA are obtained by removing the template. The porosity of HA is confirmed by Brunauer–Emmett–Teller (BET) analysis and the average pore size (below 50 nm) is determined from Transmission Electron Microscopy (TEM) images. The synthesized material is noncytotoxic as confirmed by cytotoxicity studies, which makes it a potential candidate as a biomaterial for biomedical applications. Furthermore, the MPHA shows a superior adsorption ability towards Pb2+ Ni2+ and Cd2+ in aqueous solutions, and could also be used as an environmental-friendly material for wastewater treatment and water purification. Therefore, we believe that this simple and novel synthesis route for the fabrication of porous HA could be useful in fulfilling the current demand for HA in biomedical and water purification applications.
Powder Technology | 2013
M.M.M.G.P.G. Mantilaka; D.G.G.P. Karunaratne; R.M.G. Rajapakse; H.M.T.G.A. Pitawala
Applied Surface Science | 2017
R.M.N.M. Rathnayake; H.W.M.A.C. Wijayasinghe; H.M.T.G.A. Pitawala; Masamichi Yoshimura; Hsin-Hui Huang
Advanced Powder Technology | 2014
M.M.M.G.P.G. Mantilaka; R.M.G. Rajapakse; D.G.G.P. Karunaratne; H.M.T.G.A. Pitawala
Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2014
M.M.M.G.P.G. Mantilaka; H.M.T.G.A. Pitawala; D.G.G.P. Karunaratne; R.M.G. Rajapakse
International Journal of Environmental Science and Technology | 2012
D.T. Jayawardana; Hiroaki Ishiga; H.M.T.G.A. Pitawala
Journal of Crystal Growth | 2014
M.M.M.G.P.G. Mantilaka; H.M.T.G.A. Pitawala; R.M.G. Rajapakse; D.G.G.P. Karunaratne; K. G. Upul Wijayantha
Journal of Geochemical Exploration | 2012
D.T. Jayawardana; H.M.T.G.A. Pitawala; Hiroaki Ishiga
Electrochimica Acta | 2014
K.G. Chathuranga Senarathna; M.M.M.G.P.G. Mantilaka; T. A. Nirmal Peiris; H.M.T.G.A. Pitawala; D.G.G.P. Karunaratne; R.M.G. Rajapakse
