Publicação: 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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Inglês
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, v. 426, p. 63-69.
