Synthesis of PTSH-modified CeO2 nanoparticles: Effect of the modifier on structure, optical properties, and dispersibility
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CeO2 nanoparticles were synthesized by the precipitation method and modified with para-toluene sulfonic acid (PTSH), either in situ or post-synthesis. The presence of PTSH in the samples was confirmed by FTIR. PXRD and FTIR analyses showed that the post-synthesis PTSH modification altered the CeO2 structure, whereas the in situ modification maintained intact the crystalline structure and UV-vis absorbance properties. For both in situ and post-synthesis modifications, TEM images revealed the presence of nanoparticles that were 5nm in size. The dispersibility of the in situ PTSH-modified material in a hydrophilic ureasil-poly(ethylene oxide) matrix was investigated using SAXS measurements, which indicated that CeO2 nanoparticles modified with PTSH in situ were less aggregated within the matrix, compared to unmodified CeO2 nanoparticles. © 2013 Elsevier B.V.
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CeO2 nanoparticles , Dispersibility , Surface modification , Crystalline structure , Dispersibilities , Ethylene oxides , FTIR analysis , Post-synthesis modification , Precipitation methods , Situ modification , UV-vis absorbance , Nanoparticles , Optical properties , Polyethylene oxides , Precipitation (chemical) , Surface treatment , Synthesis (chemical) , 4 toluene sulfonic acid , cerium oxide , macrogol , nanoparticle , sulfonic acid derivative , titanium dioxide , toluene , unclassified drug , infrared spectroscopy , priority journal , synthesis , transmission electron microscopy , ultraviolet radiation
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, v. 426, p. 63-69.
