Preparation and characterization of NiO, Fe2O3, Ni0.04Zn0.96O and Fe0.03Zn0.97O nanoparticles

Fernandes, D.M.; Hechenleitner, Ana Adelina Winkler; Silva, M.F.; Lima, M. K.; Bittencourt, Paulo Rodrigo Stival; Silva, R.; Melo, M.A.C. de; Pineda, Edgardo Alfonso Gómez

doi:10.1016/j.matchemphys.2009.08.016

Cited by 27 publications

(10 citation statements)

References 34 publications

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“…This procedure is similar to that described by Fernandes to obtain other metal oxide nanoparticles. [31][32][33] The materials were characterized by BET surface area, using nitrogen adsorption isotherm, X-ray Diffraction (XRD), thermogravimetric analysis (TGA), Fourier Transform Infrared (FTIR), Xr ay photoelectron spectroscopy (XPS), Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Scanning Electron Microscopy (SEM).…”

Section: Experimental Section Preparation Of the Catalystsmentioning

confidence: 99%

See 1 more Smart Citation

Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides

Ozorio

Mota

2017

ChemPhysChem

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Five metal oxides (ZnO, SnO2, Fe2O3, CeO2, La2O3) were produced by the sol–gel method and tested in the direct carbonation of glycerol with CO2. Initial tests with Fe2O3 showed that the best reaction condition was 180 °C, 150 bar, and 12 h. The other oxides were evaluated at these conditions and were all active to the formation of glycerol carbonate. Zinc oxide was the most active catalyst, with a yield of 8.1 % in the organic carbonate. The catalytic activity decreased upon washing and drying the ZnO catalyst between the runs. Nevertheless, the activity is maintained if the ZnO is washed and calcined at 450 °C between the runs. FTIR and TGA results indicated the formation of ZnCO3 as the main cause of catalyst deactivation, which may be decomposed upon calcination of the material. No appreciable leaching of Zn was observed, indicating a truly heterogeneous catalysis.

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Section: Experimental Section Preparation Of the Catalystsmentioning

confidence: 99%

“…[29,30] In this work, we used this methodology to prepare differentm etal oxides through the use of polyvinyl alcohol (PVAl) as template. [31][32][33] …”

Section: Introductionmentioning

confidence: 99%

Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides

Ozorio

Mota

2017

ChemPhysChem

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“…20 Aqueous diluted PVA (10% w/v) and saturated ferric nitrate solutions were separately prepared and then mixed at specific metallic ion/monomer unit ratios. The solutions were maintained at room temperature under stirring for 2 h and then heated under vigorous stirring until total water evaporation.…”

Section: Synthesis Of Maghemite Nanoparticles (Mag)mentioning

confidence: 99%

Optimization of maghemite-loaded PLGA nanospheres for biomedical applications

Silva

Hechenleitner

Oliveira

et al. 2013

European Journal of Pharmaceutical Sciences

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“…In addition, it is desirable that the fabrication of nanomaterials has to be cheap, easy, and environmentally friendly. 8 Different methods have been applied to synthesize nanoparticles including thermal and hydrothermal techniques such as combustion, 9 sol-gel, 10,11 micro emulsion, 12 pyrolysis, 13 and even ultrasonic-assisted methods. 14 However, the most methods of iron oxide synthesis present disadvantages such as control of pH, moisture, and temperature of the medium, the use of expensive equipment, long time to obtain the materials, and the use of organic solvents, which are harmful to the environment.…”

Section: Introductionmentioning

confidence: 99%

“…We previously reported the synthesis of NiO, Ni 0.04 Zn 0.96 O, Fe 0.03 Zn 0.97 O, ZnO, CuO, and a mixed Zn and Cu oxide by this method. 11,17 The goal of this paper is to study the influence of the amount of used polymer on the size, crystalline structure, and properties of the obtained material.…”

Section: Introductionmentioning

confidence: 99%

Nanometric particle size and phase controlled synthesis and characterization of γ-Fe2O3 or (α + γ)-Fe2O3 by a modified sol-gel method

Silva

Oliveira

Ciciliati

et al. 2013

Journal of Applied Physics

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Fe 2 O 3 nanoparticles with sizes ranging from 15 to 53 nm were synthesized by a modified sol-gel method. Maghemite particles as well as particles with admixture of maghemite and hematite were obtained and characterized by XRD, FTIR, UV-Vis photoacoustic and M€ ossbauer spectroscopy, TEM, and magnetic measurements. The size and hematite/maghemite ratio of the nanoparticles were controlled by changing the Fe:PVA (poly (vinyl alcohol)) monomeric unit ratio used in the medium reaction (1:6, 1:12, 1:18, and 1:24). The average size of the nanoparticles decreases, and the maghemite content increases with increasing PVA amount until 1:18 ratio. The maghemite and hematite nanoparticles showed cubic and hexagonal morphology, respectively. Direct band gap energy were 1.77 and 1.91 eV for A6 and A18 samples. Zero-field-cooling-field-cooling curves show that samples present superparamagnetic behavior. Maghemite-hematite phase transition and hematite N eel transition were observed near 700 K and 1015 K, respectively. Magnetization of the particles increases consistently with the increase in the amount of PVA used in the synthesis. M€ ossbauer spectra were adjusted with a hematite sextet and maghemite distribution for A6, A12, and A24 and with maghemite distribution for A18, in agreement with XRD results. V

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Preparation and characterization of NiO, Fe2O3, Ni0.04Zn0.96O and Fe0.03Zn0.97O nanoparticles

Cited by 27 publications

References 34 publications

Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides

Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides

Optimization of maghemite-loaded PLGA nanospheres for biomedical applications

Nanometric particle size and phase controlled synthesis and characterization of γ-Fe2O3 or (α + γ)-Fe2O3 by a modified sol-gel method

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Preparation and characterization of NiO, Fe2O3, Ni0.04Zn0.96O and Fe0.03Zn0.97O nanoparticles

Cited by 27 publications

References 34 publications

Direct Carbonation of Glycerol with CO2 Catalyzed by Metal Oxides

Direct Carbonation of Glycerol with CO2 Catalyzed by Metal Oxides

Optimization of maghemite-loaded PLGA nanospheres for biomedical applications

Nanometric particle size and phase controlled synthesis and characterization of γ-Fe2O3 or (α + γ)-Fe2O3 by a modified sol-gel method

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Product

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Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides

Direct Carbonation of Glycerol with CO₂ Catalyzed by Metal Oxides