Synthesis of nanocrystalline cerium oxide particles by the precipitation method

Chen, Huey-Ing; Chang, Hung-Yi

doi:10.1016/j.ceramint.2004.09.006

Cited by 263 publications

(120 citation statements)

References 34 publications

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“…These values are comparable to data reported previously in the literatures. 23,24) The band gap will increase with the decrease in particle size, this means that smaller particles exhibit better UV absorption. 25) For spherical-like nanoparticles with an in nitely high potential energy outside the sphere, the change in the optical absorption of synthesized CeO 2 is mainly due to the CeO 2 particle size.…”

Section: Resultsmentioning

confidence: 99%

The Synthesis, Characterization and Optical Properties of Nanocrystallined Cerium Dioxide by the Hydrothermal Method

2017

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Nano-sized cerium dioxides (CeO 2 ) are prepared by the hydrothermal method, using nitric cerium. The XRD study shows that nano-sized CeO 2 has an appreciable amount of cubic phase. The nano-sized CeO 2 obtained has an average particle size in the range of 4.5-10.3 nm. TEM micrographs show well-dispersed spherical-like and cubic-like CeO 2 nanoparticles. The UV-DRS absorption spectrum for alkali-treated CeO 2 shows an absorption peak at 365 384 nm.

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Section: Resultsmentioning

confidence: 99%

The Synthesis, Characterization and Optical Properties of Nanocrystallined Cerium Dioxide by the Hydrothermal Method

2017

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“…The largest particles studied (11.8 nm) were prepared by the method of Chen and Chang. 3 In this case no stabilizer was used and the particles were not diafiltered.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of CeO2 Nanoparticles

Hailstone

DiFrancesco

Reed³

2009

Microsc Microanal

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Nanoceria was produced by an aqueous precipitation technique in the presence of an organic stabilizer. The stable suspensions were diafiltered to remove reaction byproducts. Particles were characterized by transmission electron microscopy (TEM) with images used to size the particles and selected-area electron diffraction used to determine the lattice structure and the lattice constant. For all particles studied the electron diffraction data was consistent with that of CeO 2 , not Ce 2 O 3 as predicted by some researchers for very small particles sizes. At particle diameters ~1 nm the lattice expansion approached 7%. In agreement with earlier workers, we interpret this effect as due to the formation of substantial amounts of Ce 3+ with corresponding oxygen vacancies, but within the fluorite lattice structure of CeO 2 .

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“…Where Eg is the optical band gap, and λ is the wavelength corresponding to the relevant absorbance/transmission [13]. The estimated energy gap for the pure ZnO is 5.18 eV, it is increased to 5.25 eV for increasingCo doping level up to 0.01M.…”

Section: Eg=mentioning

confidence: 99%

Synthesis and Characterization of ZnO Nanoparticles using Effective of Co Doped

Anand¹

2017

IJRASET

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I.INTRODUCTION Zinc oxide having interesting physical and chemical properties, together with its cost-effective manufacturing process and abundance in nature, is a promising material for different applications, which has been intensively studied in past decades. The interest in ZnO is fueled and motivated by its excellent properties such as wide direct band gap (Eg ~3.36 eV at 300 K), high exciton binding energy (60 meV), good piezoelectric characteristics, chemical stability, and biocompatibility which make it a good candidate for diverse application including light-emitting diodes, laser diodes, solar cells, optoelectronic switches, surface acoustic wave devices, hydrogen-storage devices, transparent electrodes, transparent thin-film transistors and sensors [1][2][3][4]. These properties makes ZnO attractive in places where high hygiene it´s necessary [5]. Therefore, several methods were used to prepare ZnO nanoparticles such as: radio frequency (RF) sputtering process [6], CVD methods [7], pulsed laser deposition [8], spray pyrolisis [9], atomic layer deposition [10], chemical bath deposition [11] or electrodeposition [12]. In sol-gel technique, needs expensive precursors such as alkoxide or organometallic compounds. Forced hydrolysis and hydrothermal synthesis require higher temperatures, pressures and longer reaction time. Microemulsion technique is an important method to preparing large sized monodispersed ZnO nanocrystallites. Among all of these methods, the precipitation technique is an easy way to synthesis the nanoparticles, because of its simple procedure, cheap precursors and easy scalable. In the present work, pure and Co-doped ZnO nanoparticles were synthesized using precipitation method. The crystalline phase and structure of pure and Co doped ZnO nanoparticles are identified using XRD. The morphology and size of the samples were characterized using Scanning Electron Microscopy (SEM). The optical properties of the nanoparticles were analyzed using, UVVisible, photoluminescence spectroscopy.

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Synthesis of nanocrystalline cerium oxide particles by the precipitation method

Cited by 263 publications

References 34 publications

The Synthesis, Characterization and Optical Properties of Nanocrystallined Cerium Dioxide by the Hydrothermal Method

The Synthesis, Characterization and Optical Properties of Nanocrystallined Cerium Dioxide by the Hydrothermal Method

Synthesis and Characterization of CeO2 Nanoparticles

Synthesis and Characterization of ZnO Nanoparticles using Effective of Co Doped

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