NO Decomposition over Mn2O3and Mn3O4

Yamashita, Tatsuji; Vannice, Albert

doi:10.1006/jcat.1996.0315

Cited by 150 publications

(75 citation statements)

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“…Polymorphs of Mn 2 O 3 have been employed as environmentally friendly catalysts to remove carbon monoxide and nitrogen oxide from waste gases (Koyanaka et al 2005;He et al 2003). Studies of NO and N 2 O decomposition showed that Mn 2 O 3 is the most stable catalyst among different manganese oxides (Yamashita and Vannice 1996;Koyanaka et al 2005;He et al 2003). Mn 2 O 3 has been synthesized by various methods.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of Mn2O3 nanowires by hydrothermal method and their bactericidal and cytotoxic impact: a promising future material

Hassan

Amna

Pandeya

et al. 2012

Appl Microbiol Biotechnol

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Mn₂O₃ nanowires with diameter ~70 nm were synthesized by a simple hydrothermal method using Mn(II) nitrate as precursor. X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy techniques were employed to study structural features and chemical composition of the synthesized nanowires. A biological evaluation of the antimicrobial activity and cytotoxicity of Mn₂O₃ nanowires was carried out using Escherichia coli and mouse myoblast C₂C₁₂ cells as model organism and cell lines, respectively. The antibacterial activity and the acting mechanism of Mn₂O₃ nanowires were investigated by using growth inhibition studies and analyzing the morphology of the bacterial cells following the treatment with nanowires. These results suggest that the pH is critical factor affecting the morphology and production of the Mn₂O₃ nanowires. Method developed in the present study provided optimum production of Mn₂O₃ nanowires at pH ~ 9. The Mn₂O₃ nanowires showed significant antibacterial activity against the E. coli strain, and the lowest concentration of Mn₂O₃ nanowires solution inhibiting the growth of E. coli was found to be 12.5 μg/ml. TEM analysis demonstrated that the exposure of the selected microbial strains to the nanowires led to disruption of the cell membranes and leakage of the internal contents. Furthermore, the cytotoxicity results showed that the inhibition of C₂C₁₂ increases with the increase in concentration of Mn₂O₃ nanowires. Our results for the first time highlight the cytotoxic and bactericidal potential of Mn₂O₃ nanowires which can be utilized for various biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Controlled synthesis of Mn2O3 nanowires by hydrothermal method and their bactericidal and cytotoxic impact: a promising future material

Hassan

Amna

Pandeya

et al. 2012

Appl Microbiol Biotechnol

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“…[1][2][3][4][5][6] Among manganese oxide materials having different Mn oxidation states, Mn 2 O 3 is known as an inexpensive and an environmentfriendly catalyst for the decomposition of NO 7 and N 2 O 8 and the removal of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Alumina-Grafted Manganese Oxide Particles Using Surfactants through Coprecipitation Method and Their Thermal Properties

Kwon¹,

Park²,

Jang³

et al. 2013

Bulletin of the Korean Chemical Society

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Alumina particles were grafted onto the surface of manganese oxide particles via the coprecipitation process using surfactant and cosurfactant. The phase of Mn/Al salts (Phase I) and the phase of precipitation agent (Phase II) were prepared in aqueous surfactant solution, separately. Phase II was added into Phase I and the reaction was performed to form the precursors of composites through hydrogen bonding between Mn(OH) 2 and Al(OH) 3 prepared by the reaction of Mn/Al salts with the precipitation agent. The alumina-grafted manganese oxide particles were obtained as a final product after calcination. The concentrations of Al salt and surfactant were varied to investigate their effects on the formation and the crystallinity of composites. In addition, the crystal structure of products could be controlled by changing the calcination temperature. Through thermal analyses, it was found that the thermal stability of manganese oxide was improved by the introduction of alumina on its surface.

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“…Furthermore, the activity of those catalysts significantly decreases in the presence of oxygen, which is a component of any flue gas stream. In recent years, MnO x -based catalysts attracted much attention due to their high activity for various reactions such as, oxidative coupling of methane [9], CO and CH 4 oxidation [9,10], oxidative dehydrogenation [11,12], total oxidation of VOCs [13,14].…”

Section: Introductionmentioning

confidence: 99%

Selective Reduction of NO with CO Over Titania Supported Transition Metal Oxide Catalysts

Sreekanth

Smirniotis

2007

Catal Lett

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A series of transition metal oxides promoted titania catalysts (MO x /TiO 2 ; M = Cr, Mn, Fe, Ni, Cu) were prepared by wet impregnation method using dilute solutions of metal nitrate precursors. The catalytic activity of these materials was evaluated for the selective catalytic reduction (SCR) of NO with CO as reductant in the presence of excess oxygen (2 vol.%). Among various promoted oxides, the MnO x /TiO 2 system showed very promising catalytic activity for NO + CO reaction, giving higher than 90% NO conversion over a wide temperature window and at high space velocity (GHSV) of 50,000 h -1 . It is remarkable to note that the catalytic activity increased with oxygen, up to 4 vol.%, under these conditions leading primarily to nitrogen. Our TPR studies revealed the presence of mixed oxidation states of manganese on the catalyst surface. Characterization results indicated that the surface manganese oxide phase and the redox properties of the catalyst play an important role in final catalytic activity.

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NO Decomposition over Mn2O3and Mn3O4

Cited by 150 publications

References 0 publications

Controlled synthesis of Mn2O3 nanowires by hydrothermal method and their bactericidal and cytotoxic impact: a promising future material

Controlled synthesis of Mn2O3 nanowires by hydrothermal method and their bactericidal and cytotoxic impact: a promising future material

Synthesis of Alumina-Grafted Manganese Oxide Particles Using Surfactants through Coprecipitation Method and Their Thermal Properties

Selective Reduction of NO with CO Over Titania Supported Transition Metal Oxide Catalysts

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