Design and application of homogeneously mixed oxide composites in nano level
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Design and application of homogeneously mixed oxide composites in nano level
Design and application of homogeneously mixed oxide composites in nano level
Design and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level he Engineering Course, Department of Engineering, Graduate School of Engineering, Kochi University of Technology, Kochi. Japanfor the degree of Doctor of PhilosophyAssessment Committee:Supervisor: Prof. Kazuya KobiroCo-Supervisor: Prof. Ryuichi SugimotoCo-Supervisor: Prof. Nagatoshi NishiwakiCommitt Design and application of homogeneously mixed oxide composites in nano level ee Member: Prof. Hisao MakinoCommittee Member: Associate Prof. Masataka OhtaniMarch, 2019ABSTRACTHomogeneously mixed SiO; TiOj nanoparticle (NP) assemDesign and application of homogeneously mixed oxide composites in nano level
blies with or without surface modification by w-octyl groups were successfully synthesized through a simple, rapid, one-pot, and single-step solvotherDesign and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level consisting of Si(OF.t)4 or w-octyl-Si(O\íe).ĩ, Ti(O'Pr)4, and o-phthalic acid in methanol. An addition of acetic acid or formic acid is needed for yielding the homogeneously mixed SiO: TiOj NP assemblies with hollow spherical morphology and a high content of Si. Atomic ratios of Si:Ti in the SiOz-T Design and application of homogeneously mixed oxide composites in nano level iOi NP composites were easily controlled by adjusting the mole ratio of Si(OEt)4:Ti(OlPr)4. TiO> NPs exhibited a good dispersion in a polar solvent (mDesign and application of homogeneously mixed oxide composites in nano level
ethanol), likewise a common case, while the n-octyl-modiiìed SÌO2-TÌO2 NP composites showed a reversed phenomenon, revealing the change of hydrophobicDesign and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level d directly by fl-octyl groups through the one-pot and single-step solvothermal approach.Another homogeneously mixed SiO; composites with CeOl at nano-level were also fabricated by a similar technique for preparing the SÌO2-TÌO2 NP composites. However, in this case, the SiOj-L’cOj NP composites were Design and application of homogeneously mixed oxide composites in nano level yielded by the reaction of the precursor solutions of Si(OF.t)4 and Ce(NOj)r6H2O in methanol in the presence of .V.jVJV'.AT-IclramclhylclhylcncdiamincDesign and application of homogeneously mixed oxide composites in nano level
as an additive instead of the acid catalyst. Likewise the synthesis of SiOj-C'cCL NP composites, the content of SiOj in the NP composites was freely Design and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level decreased and the specific surface areas of the SiOj-C'cO: NP composites significantly increased in proportion to SiOj content in the SiOj-CeƠ2 NP composites. For SiO’-CeOi NP composites yielded from the solution with an equimolar amount of Si(OEt)4:Ce(NO.0ỉ-6H:O precursors, the surface area of the Design and application of homogeneously mixed oxide composites in nano level composite was over 300 nr'g. In particular, as expected by mixing the SiO; with CeO;. the SiOr-CeO2 XP assemblies exhibited a high heat tolerance thrDesign and application of homogeneously mixed oxide composites in nano level
ough the retention of the small size of CeO> crystallites as well as the large specific surface areas, even after calcination at 850 °C for 3 h or at Design and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level fine primary particles, the prepared CeOi aggregates. SiO’-CeO’ and TiOi-CeOl nanocomposites are applied to sintering-resistant catalyst supports for highly exothermic reactions. Well-dispersed Ru metal catalysts are deposited on the support surfaces by the precipitation-deposition method. The meth Design and application of homogeneously mixed oxide composites in nano level anation of CO’ by H’. a highly exothermic reaction, is selected as a probe reaction to confirm the sintering-resistant ability' of those prepared suppDesign and application of homogeneously mixed oxide composites in nano level
orts. As expected, low-temperature (150-200 °C) activity of the Ru catalysts on the prepared CeO; aggregate and TiOz-CeO: composite yielding CHí are bDesign and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level red supports are also achieved.nTABLE OF CONTENTSABSTRACT............................................................................iTABLE OF CONTENTS.................................................................iiiLIST OF TABLES AND FIGURES....................................................... Design and application of homogeneously mixed oxide composites in nano level ..viCHAPTER 1...........................................................................1General Introduction.........................................Design and application of homogeneously mixed oxide composites in nano level
.......................II. I. Mixed oxide nanocomposites..................................................I1.2.Synthetic approaches lo metal oxide nanDesign and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to th Design and application of homogeneously mixed oxide composites in nano level solvothermally prepared nanomaterialsin catalysis.8CHAPTER II.........................................................................16One-step Direct Synthesis of SiOz-TiOz Composite Nanoparticle Assemblieswith HollowSpherical Morphologies.......................................................... Design and application of homogeneously mixed oxide composites in nano level ...162.1.Introduction................................................................162.2.Experimental Section.......................................Design and application of homogeneously mixed oxide composites in nano level
.................192.2.1.Materials...............................................................19Design and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to thDesign and Application of Homogeneously Mixed Oxide Composites in Nano-levelByHien Thi Thu NguyenStudent ID Number: 1206003A dissertation submit to thGọi ngay
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