Effect of hydrothermal ripening on the photoluminescence properties of pure and doped cerium oxide nanoparticles

Palard, Mickaël; Balencie, Jérémy; Maguer, Aude; Hochepied, Jean-François

doi:10.1016/j.matchemphys.2009.10.025

Cited by 89 publications

(55 citation statements)

References 30 publications

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“…The variation of FTIR spectra indicated the change of Mn O vibrations in octahedral environments after Ce doping. In addition, no peaks between 1300 and 1500 cm −1 attributed to Ce O bonds [20] were detected, indicating no segregated cerium oxide impurities existed. The morphology change, the broadened XRD peaks and the FTIR spectroscopy studies revealed that Ce was incorporated into the framework of Ce(0.48)-OMS-2.…”

Section: Characterization Of Catalystsmentioning

confidence: 97%

Enhanced catalytic degradation of ciprofloxacin over Ce-doped OMS-2 microspheres

Zhang

Lyu

2016

Applied Catalysis B: Environmental

121

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Section: Characterization Of Catalystsmentioning

confidence: 97%

Enhanced catalytic degradation of ciprofloxacin over Ce-doped OMS-2 microspheres

Zhang

Lyu

2016

Applied Catalysis B: Environmental

121

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“…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%

“…The synthesis methods require hard conditions at extreme temperature and pressure; they are also still limited in the amount of nanoparticles. However, chemical precipitation provides a promising pathway for large scale production of nanosized particles at ambient conditions [11][12][13].…”

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

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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.

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“…Whereas, the strong broad band below 700 cm-1 corresponds typically to Ce-O stretching vibration mode [49] confirming the formation of pure ceria (CeO 2 ). Residual water and hydroxyl groups absorbed from atmosphere are usually detected in the as-synthesized nanoceria samples regardless the synthetic method used [50][51][52][53] .…”

Section: Photocatalytic Performancementioning

confidence: 99%

Nanoceria Tween-assisted synthesis, characterization, photocatalytic efficiency and antimicrobial activity

Aziz¹

2017

IJNME

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Ceria nanoparticles (CeO 2 NPs) have been synthesized by wet chemical technique using NH 4 OH precipitation method. CeO 2 NPs were prepared in presence of different concentration of the non-ionic surfactants Tween 20 and 80 of hydrophilic-lipophilic balance (HLB) of 16.7 and 15.0, respectively, to improve and controlling the size and shape of CeO 2 -NPs.The role of these surfactants in controlling the size of CeO 2 NPs has been discussed. The synthesized CeO 2 NPs were characterized by Fourier transform infrared (FT-IR), Raman spectroscopy, UV-Visible spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The TEM micrographs and XRD patterns confirmed the semi-spherical structure of CeO 2 NPs with ultrafine particle sizes ranging from 5.9 nm to 11.0 nm. FT-IR and Raman spectral analysis confirmed the identities of the oxides. In vitro antimicrobial studies show significant zone of inhibition against bacterial and fungal strains. The efficiency of CeO 2 NPs as a promising candidate in photocatalysis was evaluated using a methylene blue (MB) as organic contaminant dye irradiated with UV light from conventional high-efficiency low-pressure and low power (6 watt) mercury lamp is also established. Keywords:

show abstract

Effect of hydrothermal ripening on the photoluminescence properties of pure and doped cerium oxide nanoparticles

Cited by 89 publications

References 30 publications

Enhanced catalytic degradation of ciprofloxacin over Ce-doped OMS-2 microspheres

Enhanced catalytic degradation of ciprofloxacin over Ce-doped OMS-2 microspheres

Surfactant-assisted formation of organophilic CeO2 nanoparticles

Nanoceria Tween-assisted synthesis, characterization, photocatalytic efficiency and antimicrobial activity

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