Template-Free Hydrothermal Synthesis of CeO<sub>2</sub> Nano-octahedrons and Nanorods: Investigation of the Morphology Evolution

Lü, Yan; Yu, Ranbo; Chen, Jun; Xing, Xianran

doi:10.1021/cg800117v

Cited by 310 publications

(213 citation statements)

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“…The uniform organic-capping-free CeO 2 nanostructures were synthesized in two morphologies, rod-like and octahedral, by using a hydrothermal process [27]. Ce(NO 3 ) 3 ·6H 2 O was used as the cerium source., No organic surfactant or template was introduced in the synthesis.…”

Section: Synthesis Of Ceo 2 Nanorods and Nanooctahedramentioning

confidence: 99%

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

et al. 2010

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Uniform clusters of Pt have been deposited on the surface of capping-agent-free CeO 2 nanooctahedra and nanorods using electron beam (e-beam) evaporation. The coverage of the Pt nanocluster layer can be controlled by adjusting the e-beam evaporation time. The resulting e-beam evaporated Pt nanocluster layers on the CeO 2 surfaces have a clean surface and clean interface between Pt and CeO 2 . Different growth behaviors of Pt on the two types of CeO 2 nanocrystals were observed, with epitaxial growth of Pt on CeO 2 nanooctahedra and random growth of Pt on CeO 2 nanorods. The structures of the Pt clusters on the two different types of CeO 2 nanocrystals have been studied and compared by using them as catalysts for model reactions. The results of hydrogenation reactions clearly showed the clean and similar chemical surface of the Pt clusters in both catalysts. The supportdependent activity of these catalysts was demonstrated by CO oxidation. The Pt/CeO 2 nanorods showed much higher activity compared with Pt/CeO 2 nanooctahedra because of the higher concentration of oxygen vacancies in the CeO 2 nanorods. The structure-dependent selectivity of dehydrogenation reactions indicates that the structures of the Pt on CeO 2 nanorods and nanooctahedra are different. Thes differences arise because the metal deposition behaviors are modulated by the strong metal-metal oxide interactions.

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Section: Synthesis Of Ceo 2 Nanorods and Nanooctahedramentioning

confidence: 99%

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

et al. 2010

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“…It has been extensively utilized in many practical applications such as polishing materials [3], solar cells [4], ultraviolet blocking materials [5,6] and photocatalytic materials. Pure CeO 2 , an n-type semiconductor, has a band gap (3.2 eV) similar to those of other commonly utilized semiconductor-based photocatalyst such as TiO 2 [7] and possesses potential as a suitable photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Zhang

Yuán

et al. 2015

Applied Catalysis B: Environmental

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a b s t r a c tYttrium-doped hedgehog-like ceria with a high concentration of oxygen vacancies was successfully prepared by a traditional hydrothermal process. Crystal phase composition, morphology, and size of as-fabricated products were found to be greatly dependent on the mole ratio of original materials and reaction temperature. The morphology and size of the as-prepared samples were characterized by FE-SEM, HR-TEM and HADDF-STEM. Structure information was obtained by XRD and Raman analyses. Absorption band and band gap energy, which are responsible for the observed photocatalytic behavior, were investigated by UV-vis diffuse reflectance. In addition, the optimum experimental conditions for target products were determined. The as-prepared doped three dimensional (3D) hierarchical structure samples showed higher photocatalytic activity than that of one dimensional (1D) octahedral and nanorod morphology ceria as evaluated by measuring CO 2 liberation form the photocatalytic decomposition of acetaldehyde.

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“…A significant advantage of hydrothermal synthesis, as compared to other methods, is that it makes it possible to obtain in some cases, as was shown in [23][24][25][26][27], almost completely non-agglomerated nanoparticles, which have a narrow size distribution range. Such properties of the nanopowders, which are formed under hydrothermal conditions, are the result of a fast nucleation process, as was shown in [28,29].…”

Section: Introductionmentioning

confidence: 99%

Biological effect of zirconium dioxide-based nanoparticles

Almjasheva¹,

Гарабаджиу²,

Kozina³

et al. 2017

Nanosystems: Phys. Chem. Math.

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Template-Free Hydrothermal Synthesis of CeO₂ Nano-octahedrons and Nanorods: Investigation of the Morphology Evolution

Abstract: Figure S1. XRD patterns of the CeO 2 hydrothermal treated at 170 o C for (a) 12h, (b) 24h, (c) 48h, (d) 144h.

Cited by 310 publications

References 22 publications

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Biological effect of zirconium dioxide-based nanoparticles

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Template-Free Hydrothermal Synthesis of CeO2 Nano-octahedrons and Nanorods: Investigation of the Morphology Evolution

Abstract: Figure S1. XRD patterns of the CeO 2 hydrothermal treated at 170 o C for (a) 12h, (b) 24h, (c) 48h, (d) 144h.

Cited by 310 publications

References 22 publications

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

Catalytic properties of Pt cluster-decorated CeO2 nanostructures

Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Biological effect of zirconium dioxide-based nanoparticles

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Template-Free Hydrothermal Synthesis of CeO₂ Nano-octahedrons and Nanorods: Investigation of the Morphology Evolution