Hydrothermal synthesis of prism-like mesocrystal CeO2

Lu, Xiaowang; Li, Xiazhang; Chen, Feng; Ni, Chaoying; Chen, Zhigang

doi:10.1016/j.jallcom.2008.09.198

Cited by 94 publications

(62 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 5 c shows the morphology of the sample of alumina modified with barium oxide, displaying particles of about 1 mm, it can be noticed that such morphology is similar to the mesocrystal structure reported [17]. In the particle enlarged, the aluminate phase, displaying the stoichiometry BaAl 9.2 O 14.8 , is clearly observed on the surface of the alumina.…”

Section: Discussionsupporting

confidence: 69%

Chemical modification of the surface of alumina with alkaline earth metal oxides using the polymeric precursor method for catalysis application

et al. 2014

View full text Add to dashboard Cite

In this study, modifications of alumina surface with of alkaline earth metal oxides were studied, using the polymeric precursor method. The modified compounds were characterized by X-ray diffraction, nitrogen adsorption-desorption and scanning electron microscopy. The catalytical properties of these new catalysts were evaluated for the transesterification reaction of babassu oil. It is observed that the transesterification reaction of babassu oil with methanol was successfully carried out using the modified alumina samples. Keywords: surface modification, alumina, alkaline earth metal oxides. Resumo Neste trabalho foram estudadas modificações da superfície de alumina com óxidos de metais alcalino-terrosos, usando o método dos precursores poliméricos. Os compostos modificados foram caracterizados por difração de raios X, adsorção-dessorção de nitrogênio e microscopia eletrônica de varredura. As propriedades catalíticas desses novos catalisadores foram avaliadas para

show abstract

Section: Discussionsupporting

confidence: 69%

Chemical modification of the surface of alumina with alkaline earth metal oxides using the polymeric precursor method for catalysis application

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The spectra are normalized with respect to the most intense signal at 424 nm to examine the effect of surfactants on the emission. The emission bands at 424 nm and 394 nm are generally attributed to charge transfer from O 2 to Ce 4+ , that is, electron transition or charge transfer from oxygen vacancies [5,28,29]. The two weak and broad signals at 365 nm and 350 nm are ascribed to charge transfer transition from O 2− to Ce 4+ [12,30].…”

Section: Surface Chemistry and Stability Of Particle Dispersionmentioning

confidence: 99%

“…Ceria (CeO 2 ) is one of the most frequently studied rare earth metal oxides and possesses unique physicochemical properties, such as absorption of ultraviolet radiation [2], gas sensing [3], and catalytic properties [4,5]. Moreover, it is a wide band gap semiconductor, with a band gap of 3.2 eV [6].…”

Section: Introductionmentioning

confidence: 99%

Surfactant-assisted formation of organophilic CeO2 nanoparticles

Tunusoğlu

Muñoz‐Espí

Akbey

et al. 2012

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

a b s t r a c tWe report a simple one-pot method to prepare organically functionalized CeO 2 nanoparticles by controlled chemical precipitation. The particles were nucleated by mixing aqueous solutions of Ce(NO 3 ) 3 ·6H 2 O and ammonia at room temperature. Different small organic molecules were chosen as capping agents and injected into the reaction medium at the beginning of the synthesis: 3-(mercaptopropyl) trimethoxy silane (MPS), hexadecyltrimethyl ammonium bromide (CTAB), 3-mercapto propionic acid (3-MPA), and thioglycolic acid (TGA). The resulting nanocrystals were quasi-spherical and had a narrow mean size distribution with an average size smaller than 10 nm. Dynamic nuclear polarization enhanced NMR (DNP-NMR) and FTIR measurements suggested a chemical grafting of the surfactant and a homogeneous surface modification. The colloidal stabilities were characterized by dynamic light scattering and zeta potential measurements. The stabilization by aliphatic groups was tested with a frequently used hydrophobic monomer, methyl methacrylate. According to the results, CTAB is the most effective of the used stabilizing surfactant. The mechanism of formation of the organophilic CeO 2 nanoparticles is discussed.

show abstract

“…Among them, the electrochemical deposition method [22], hydrothermal synthesis [23][24][25], pyrrolidone solution route [26,27], sol-gel method [28,29], soft solution method [30][31][32], co-precipitation technique [33,34], modified glycine-nitrate procedure [35] and self-propagating reaction at room temperature [35] can all be listed.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Influence of temperature and dopant concentration on structural, morphological and optical properties of nanometric Ce1−Er O2−δ (x = 0.05–0.20) as a pigment

et al. 2015

View full text Add to dashboard Cite

Influence of temperature and dopant concentration on structural, morphological and optical properties of nanometric Ce1-xErxO2-(x = 0.05-0.20) as a pigment This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. KAUST Repository M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT AbstractCeramic pigments based on cerium oxide were synthesized by self-propagating room temperature method and their color properties were assessed from the viewpoint of potential environmentally nontoxic pink pigments. Thermal stabilities of the pigments were examined at 600, 900 and 1200 ºC. According to X-ray powder diffraction and Raman spectroscopy results, all obtained pigments were single-phase solid solutions of cerium oxide, independent of the concentration of dopants. The X-ray analysis showed that the crystallites were of nanometric dimensions, as recorded and by transmission electron microscopy analysis. Color characteristics of solid solutions, which depended on concentracion erbium ions and calcination temperature, M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPTand their position in the chromaticity diagram were studied by ultraviolet-visible spectrophotometry, which confirmed potential application of environmentally friendly pigments of desired color. The color efficiency of pigments was also evaluated by colorimetric analysis.

show abstract

Hydrothermal synthesis of prism-like mesocrystal CeO2

Cited by 94 publications

References 38 publications

Chemical modification of the surface of alumina with alkaline earth metal oxides using the polymeric precursor method for catalysis application

Chemical modification of the surface of alumina with alkaline earth metal oxides using the polymeric precursor method for catalysis application

Surfactant-assisted formation of organophilic CeO2 nanoparticles

Influence of temperature and dopant concentration on structural, morphological and optical properties of nanometric Ce1−Er O2−δ (x = 0.05–0.20) as a pigment

Contact Info

Product

Resources

About