| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 593640 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2013 | 7 Pages |
•CeO2 NP were modified with PTSH by both in situ and post modification methods.•PTSH grafting on CeO2 nanoparticles was confirmed by FTIR.•In situ modification allows the CeO2 structure and optical properties preservation.•PTSH modification allows a better CeO2 dispersion in the PEO–siloxane hybrid.
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 5 nm 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.
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