Quasi-isothermal decomposition: a way to nanocrystalline mesoporous-like Fe2O3 catalyst for rapid heterogeneous decomposition of hydrogen peroxide

Heřmánek, Martin; Hermankova, Pavla; Pěchoušek, Jiří

doi:10.1039/c000632g

Cited by 11 publications

(15 citation statements)

References 74 publications

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Section: Methodsmentioning

confidence: 99%

“…Samples were selected based on previous materials studies [1,2]. The first sample of amorphous Fe 2 O 3 nanoparticles was prepared by the thermal treatment of 500 mg of iron(III) oxalate hexahydrate, Fe 2 (C 2 O 4 ) 3 6H 2 O (Sigma Aldrich), in air at a conversion temperature of 180 °C for 3 h [2], and is denoted as the Sample A. The second sample of amorphous Fe 2 O 3 nanoparticles was prepared by the thermal treatment of 1 g of iron(II) oxalate dihydrate, FeC 2 O 4 2H 2 O (Sigma-Aldrich), in air at a conversion temperature of 175 °C for 8 h [1], and is denoted as the Sample B.…”

Section: Methodsmentioning

confidence: 99%

“…Materials are described as mesoporous-like powders, consisting of ultrasmall (< 5 nm) amorphous Fe 2 O 3 . The catalytic efficiency of the selected synthesized nanoparticles was tested by tracking the decomposition of hydrogen peroxide as reported in [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The morphology of these iron oxide nanomaterials indicate that nanoparticles are agglomerated with nonuniform (Sample A) or mostly uniform (Sample B) shapes[2]. SEM and TEM images of the (a, b) Sample A and (c, d) Sample B.…”

mentioning

confidence: 99%

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Iron oxide nanoparticle powders with high surface area

Křížek¹,

Pěchoušek²,

Šafářová³

et al. 2012

AIP Conference Proceedings

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The magnetic behavior of iron oxide passivated iron nanoparticles Abstract. Iron oxide nanomaterials with desired properties synthesized in the form of nanoparticle powders can find attractive applicability, e.g. in catalysis. Hence it is necessary to thoroughly characterize the materials by several measuring techniques. Two selected samples of amorphous Fe 2 O 3 nanoparticles with high specific surface area values were prepared by the thermal treatment of different iron-bearing precursors. In addition to Mössbauer and microscopy methods, the nitrogen sorption based surface analysis is discussed from the viewpoint of textural morphology characterization of mentioned nanomaterials. The nitrogen adsorption-desorption isotherms have been measured and indicate the presence of micro and mesoporosity. One can conclude that the porosity arises from intra-aggregate voids and spaces formed by inter-particle contacts. The state of agglomeration can be estimated and appropriate application chosen.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Iron oxide nanoparticle powders with high surface area

Křížek¹,

Pěchoušek²,

Šafářová³

et al. 2012

AIP Conference Proceedings

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“…Recently, researchers have diverted attention towards nano-materials and their applications in the field of catalysis. In this scenario, iron oxide nanoparticle is a potent candidate to be investigated as a catalyst in various industrially important reactions, including the synthesis of NH 3 , water shift reaction, desulfurization of natural gas, dehydrogenation of ethyl benzene, oxidation of alcohol, and manufacture of butadiene [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Iron Oxide Nanoparticles Supported on Ziconia and Its Application in the Gas-Phase Oxidation of Cyclohexanol to Cyclohexanone

Sadiq

Zamin²,

nbsp³

et al. 2014

MRC

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Iron oxide nanoparticles supported on zirconia were prepared by precipitation-deposition method and characterized by XRD, SEM, FT-IR, TGA/DTA, surface area and particle size analysis. Catalytic activities of the catalysts were tested in the gas-phase conversion of cyclohexanol in a fixed-bed flow type, Pyrex glass reactor, at 433 -463 K. Major detected products were cyclohexanone, cyclohexene and benzene, depending on the used catalyst. The rate of reaction was significantly raised by the introduction of molecular oxygen in the feed gas, thereby suggesting the oxidation of cyclohexanol to cyclohexanone. Furthermore, the catalytic activity of iron oxide nanoparticles supported on zirconia treated with hydrogen at 553 K for 2 hours, was more selective and better than the unreduced iron oxide nanoparticles supported on zirconia, in the gas-phase oxidation of cyclohexanol to cyclohexanone. Experimental results showed that there was no leaching of metal, and that the catalyst was thus truly heterogeneous.

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Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe₂ O₃

Kocher

Кумар

Priya³

et al. 2014

Phys. Status Solidi B

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We report a simple, eco-friendly facile wet chemical nitrate precursor route for the synthesis of pristine and nickelcontaining nanocrystalline ($44 nm) a-Fe 2 O 3 . Thermal analysis of the dried ($70 8C) presumed oxalate powder, Fe 2 (C 2 O 4 ) 3 Á 4H 2 O (also confirmed by X-ray diffraction), revealed two-step formation of the oxide; slower reaction as Fe 2 (C 2 O 4 ) 3 Á 4H 2 O# ! 4H 2 O" þ 2CO 2 " þ 2FeC 2 O 4 # and faster as 2FeC 2 O 4 ! Fe 2 O 3 # þ CO 2 " þ 3CO". The incorporation of nickel resulted in progressive increase of cell parameters and exhibited decrease in estimated direct and indirect band gap values. The direct band gap values were in close correlation with emission transitions. The direct nature and narrowing of band gap with nickel addition ensures the higher absorbance values and wider spectrum of absorbance; indicating the enhanced semiconducting properties for applications such as solar cells, photocatalytic activity, etc. Regarding magnetic properties, the saturation magnetization increased progressively with nickel content while coercivity reduced up to 2 wt% of Ni content and increased afterward. The resistivity values with nickel incorporation decreased, when substituted at Fe 3þ sites.

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Quasi-isothermal decomposition: a way to nanocrystalline mesoporous-like Fe2O3 catalyst for rapid heterogeneous decomposition of hydrogen peroxide

Cited by 11 publications

References 74 publications

Iron oxide nanoparticle powders with high surface area

Iron oxide nanoparticle powders with high surface area

Synthesis and Characterization of Iron Oxide Nanoparticles Supported on Ziconia and Its Application in the Gas-Phase Oxidation of Cyclohexanol to Cyclohexanone

Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe₂ O₃

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Quasi-isothermal decomposition: a way to nanocrystalline mesoporous-like Fe2O3 catalyst for rapid heterogeneous decomposition of hydrogen peroxide

Cited by 11 publications

References 74 publications

Iron oxide nanoparticle powders with high surface area

Iron oxide nanoparticle powders with high surface area

Synthesis and Characterization of Iron Oxide Nanoparticles Supported on Ziconia and Its Application in the Gas-Phase Oxidation of Cyclohexanol to Cyclohexanone

Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe2 O3

Contact Info

Product

Resources

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Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe₂ O₃