Synthesis of CeO2, ZrO2, Ce0.5Zr0.5O2, and TiO2 nanoparticles by a novel oil-in-water microemulsion reaction method and their use as catalyst support for CO oxidation

Sánchez-Domínguez, Margarita; Liotta, Leonarda Francesca; Carlo, Gabriella Di; Pantaleo, G.; Venezia, Anna Maria; Solans, Conxita; Boutonnet, Magali

doi:10.1016/j.cattod.2010.05.026

Cited by 83 publications

(38 citation statements)

References 15 publications

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“…Microemulsion has been reported as a successful synthesis media for catalysts preparation offering particles in the nano-size range, high specific surface area and high metallic dispersion [17,18]. Since the first report on the use of microemulsions in the preparation of noble-metal catalysts, different catalytic systems have been obtained successfully by this method, including oxide-based materials [19].…”

Section: Introductionmentioning

confidence: 99%

Fe-doped ceria solids synthesized by the microemulsion method for CO oxidation reactions

Laguna

Centeno

Boutonnet

et al. 2011

Applied Catalysis B: Environmental

156

126

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A series of Ce-Fe mixed oxides as well as the pure oxides were synthesized by the microemulsions method. The solid solution formation was established for all the Fedoped systems and only a hardly noticeable segregation of α-Fe 2 O 3 was appreciated for the solid with the maximum iron content (50 Fe atomic%). The oxygen exchange is improved for all the Fe-doped systems; however the 10 Fe atomic% appears as the optimal iron content for achieving the maximum oxygen vacancies concentration and the higher reducibility efficiency. The CO oxidation (TOX, PROX) is especially achieved for the solids with the lower iron contents but with a superior oxygen vacancies proportion. These Ce-Fe systems prepared from microemulsions are very attractive to be considered as supports for depositing active phases capable of enhancing oxygen exchange ability of the whole system, allowing higher CO oxidation abilities.

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Section: Introductionmentioning

confidence: 99%

Fe-doped ceria solids synthesized by the microemulsion method for CO oxidation reactions

Laguna

Centeno

Boutonnet

et al. 2011

Applied Catalysis B: Environmental

156

126

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“…The preparation of metal oxide NPs using the O/W microemulsion reaction method has been recently reported. 22,23 This method consists of dissolving the metal precursor in oil droplets (generally composed of hydrocarbons or esters), stabilized by a monolayer of surfactant and dispersed in the continuous aqueous phase. Usually, a precipitating agent is added to the O/W microemulsion directly as an aqueous solution.…”

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confidence: 99%

Synthesis of ZnO and ZnO2 Nanoparticles by the Oil-in-water Microemulsion Reaction Method

et al. 2012

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Crystalline ZnO and ZnO 2 nanoparticles (NPs) were prepared in one-pot oil-in-water (O/W) microemulsion media at room temperature by adding an aqueous solution of sodium hydroxide (followed by H 2 O 2 in the case of synthesis of ZnO 2 ) to the O/W microemulsion containing a Zn(II) organometallic precursor dissolved in the oil phase. After calcination of ZnO 2 NPs, ZnO NPs were also obtained, and their characteristics were compared with those of ZnO NPs prepared directly in O/W microemulsion. The materials were characterized by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. Nanostructured ZnO materials have attracted a lot of attention in recent years because of their optical, electrical, and chemical properties, as well as their low toxicity. These materials are n-type semiconductors with a band gap of 3.37 eV and an exciton binding energy of 60 meV; in addition, they exhibit efficient UV-stimulated emission 1 at room temperature. Nanostructured ZnO has great potential for use in a wide range of applications, for example, in phosphors, 2,3 varistors, 4a,4b gas sensors, 57 UV absorbers, 8 and antimicrobial agents, 9 and more recently, in solar cells.

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“…In this context, an item of special urgency is to develop highly efficient scalable technologies for the preparation of nanodispersed CeO 2 powders with preset micromorphology and controllable particle size distribution to be suitable as precursors for preparation of functional nanocomposites. The most extensively applied techniques are based on synthesis of ceria in organic-inorganic mediums: direct precipitation of ceria from cerium salts (Han et al 2005;Woodhead 1980;Scholes et al 2007), synthesis in microemulsions (Sanchez-Dominguez et al 2009;Sanchez-Dominguez et al 2010;Patil et al 2002), sol-gel technique (Laberty-Robert et al 2006;Thundathil et al 2004;Xiao et al 2009;Niederberger and Garnweitner 2006;Gu and Soucek 2007;Gnanam and Rajendran 2011), hydrothermal and hydrothermal-microwave synthesis (Yang et al 2010;Lawrence et al 2011;Zhou et al 2007;Devaraju et al 2009;Shan et al 2009;Ivanov et al 2009), and so on. Nanoscale ceria is very attractive for TWC, SOFC, biological applications, solar cells, UV radiation filters, electrochromic devices, polishing mixtures and abrasives, etc., because of the high mobility of lattice oxygen (Blanco et al 1999;Milliken et al 2002;Ivanov et al 2010;Trovarelli 2002).…”

Section: Introductionmentioning

confidence: 99%

Formation of mesoporous nanocrystalline ceria from cerium nitrate, acetate or acetylacetonate

Zagaynov

Kutsev

2013

Appl Nanosci

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Ceria nanopowders with a crystallite size of 5-20 nm have been prepared by the sol-gel method using cerium (III) nitrate, acetate or acetylacetonate as cerium source. Dimethyloctylamine, monoethanolamine, or tetraethylammonium hydroxide were used as low molecular weight stabilizers. In all cases ceria obtained have a mesoporous structure with pore diameter 3-5 nm. It is shown how the initial salt and stabilizer significantly affect the physical-chemical properties of the obtained ceria powders. Also the temperature of CO full conversion was demonstrated not to be dependent on particle size, surface area, or pore size.

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Synthesis of CeO2, ZrO2, Ce0.5Zr0.5O2, and TiO2 nanoparticles by a novel oil-in-water microemulsion reaction method and their use as catalyst support for CO oxidation

Cited by 83 publications

References 15 publications

Fe-doped ceria solids synthesized by the microemulsion method for CO oxidation reactions

Fe-doped ceria solids synthesized by the microemulsion method for CO oxidation reactions

Synthesis of ZnO and ZnO2 Nanoparticles by the Oil-in-water Microemulsion Reaction Method

Formation of mesoporous nanocrystalline ceria from cerium nitrate, acetate or acetylacetonate

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