Cobalt and cobalt-iron spinel oxides as bulk and silica supported catalysts in the ethanol combustion reaction

Hammiche-Bellal, Yasmina; Zouaoui-Mahzoul, Nabila; Lounas, Ibtissem; Benadda, Amel; Benrabaa, Rafik; Auroux, A.; Meddour-Boukhobza, Laâldja; Djadoun, Amar

doi:10.1016/j.molcata.2016.11.005

Cited by 17 publications

(6 citation statements)

References 56 publications

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“…Mn-based oxides and Pt supported catalysts have displayed the most potential to date, [610][611][612][613] but other transition metal (Cr, Co and Ce)-based catalysts and Au supported catalysts have also displayed some promise. [614][615][616][617][618] There are many examples of highly active MnOx based catalysts for the oxidation of ethanol documented in the literature. Bai et al 619 determined that the morphology of a MnO2 catalyst could have a dramatic influence on its catalytic performance in this reaction.…”

Section: Ethanolmentioning

confidence: 99%

“…For this reason, numerous examples of materials have been studied for the low-temperature destruction of ethanol. Mn-based oxides and supported Pt catalysts have displayed the most potential to date, − but other transition metal (Cr, Co, and Ce)-based catalysts and supported Au catalysts have also displayed some promise. − …”

Section: Oxidation Of Different Sorts Of Vocsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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Section: Ethanolmentioning

confidence: 99%

Section: Oxidation Of Different Sorts Of Vocsmentioning

confidence: 99%

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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“…In the past decade, massive efforts have been made to develop transition metal oxide catalysts for ethanol combustion that can replace noble metals due to the advantages of comparable activity, superior stability, and low cost. − Besides, Mn-based oxides containing multiple valence states have been extensively investigated for their excellent catalytic activity and are expected to be the most competitive materials for catalytic oxidation of volatile organic compounds (VOCs) . A previous study on the catalytic combustion of different hydrocarbons (benzene and toluene) revealed the activity sequence as the order of Mn 3 O 4 > Mn 2 O 3 > MnO 2 .…”

Section: Introductionmentioning

confidence: 99%

Catalytic Combustion Study of Ethanol Over Manganese Oxides with Different Morphologies

et al. 2022

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Ethanol is extensively used in the transport field as a clean additive and alternative for gasoline in internal combustion engines, although its incomplete combustion inevitably releases harmful species to humans and the environment. Mn-based oxides, one of the most promising materials for catalytic combustion, have attracted considerable interest due to their excellent catalytic performance and low cost. In this work, hydrothermal methods were used to synthesize the different manganese oxides with distinct morphologies (1D-Mn 3 O 4 nanorod, 2D-Mn 3 O 4 nanoplate, and 3D-Mn 3 O 4 nano-octahedron). Meanwhile, catalytic activity over these three catalysts was evaluated for ethanol combustion. The physicochemical properties of these samples were characterized by X-ray diffraction, N 2 -BET, field emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Raman, and H 2 -TPR. Among the three catalysts, the Mn 3 O 4 nanoplate exhibited an optimal performance at a space velocity of 60 000 mL g −1 h −1 . The apparent activation energy associated with the nanoplate material (25.6 kJ/mol) was lower than that of the 1D-Mn 3 O 4 nanorod (28.9 kJ/mol) and 3D-Mn 3 O 4 nano-octahedron (37.3 kJ/mol). According to characterization results, the Mn 3 O 4 nanoplate catalyst exhibits a small crystal size, large surface area, more exposed (112) facets, abundant Mn 4+ , and defective structure, contributing to a superior catalytic performance at the high space velocity of 120 000 mL g −1 h −1 . In addition, we conclude that the catalytic combustion of ethanol follows the Mars-van Krevelen mechanism based on the kinetic simulation results of experimental data.

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“…SQUID-vibrating sample magnetometry (VSM) analysis showed the formation of superparamagnetic behavior, while a temperature dependence study using field cooling and zero field cooling analysis (ZFC/FC) showed spin-glass-like surface layers in the mixed metal oxide spinel composite. CuFe 2 O 4 composite formation with activated carbon was reported using the co-precipitation technique [12–13].…”

Section: Introductionmentioning

confidence: 99%

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe₂O₄/silica/cisplatin nanocomposite formulation

Jermy¹,

Ravinayagam²,

Alamoudi³

et al. 2019

Beilstein J. Nanotechnol.

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The combination of magnetic nanoparticles with a porous silica is a composite that has attracted significant attention for potential multifunctional theranostic applications. In this study, 30 wt % CuFe2O4 was impregnated into a matrix of monodispersed spherical hydrophilic silica (HYPS) nanoparticles through a simple dry impregnation technique. The chemotherapy drug cisplatin was loaded through electrostatic equilibrium adsorption over 24 h in normal saline solution. The presence of cubic spinel CuFe2O4 on HYPS was confirmed through powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR) and diffuse reflectance UV–vis spectroscopy (DR UV–vis) analysis. The HYPS particles showed a surface area of 170 m2/g, pore size of 8.3 nm and pore volume of 0.35 cm3/g. The cisplatin/CuFe2O4/HYPS nanoformulation showed the accumulation of copper ferrite nanoparticles on the surface and in the pores of HYPS with a surface area of 45 m2/g, pore size of 16 nm and pore volume of 0.18 cm3/g. Transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) mapping analysis showed the presence of homogeneous silica particles with nanoclusters of copper ferrite distributed on the HYPS support. Vibrating sample magnetometry (VSM) analysis of CuFe2O4/HYPS showed paramagnetic behavior with a saturated magnetization value of 7.65 emu/g. DRS UV–vis analysis revealed the functionalization of cisplatin in tetrahedral and octahedral coordination in the CuFe2O4/HYPS composite. Compared to other supports such as mesocellular foam and silicalite, the release of cisplatin using the dialysis membrane technique was found to be superior when CuFe2O4/HYPS was applied as the support. An in vitro experiment was conducted to determine the potential of CuFe2O4/HYPS as an anticancer agent against the human breast cancer cell line MCF-7. The results show that the nanoparticle formulation can effectively target cancerous cells and could be an effective tumor imaging guide and drug delivery system.

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Cobalt and cobalt-iron spinel oxides as bulk and silica supported catalysts in the ethanol combustion reaction

Cited by 17 publications

References 56 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Catalytic Combustion Study of Ethanol Over Manganese Oxides with Different Morphologies

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe₂O₄/silica/cisplatin nanocomposite formulation

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Cobalt and cobalt-iron spinel oxides as bulk and silica supported catalysts in the ethanol combustion reaction

Cited by 17 publications

References 56 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Catalytic Combustion Study of Ethanol Over Manganese Oxides with Different Morphologies

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe2O4/silica/cisplatin nanocomposite formulation

Contact Info

Product

Resources

About

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe₂O₄/silica/cisplatin nanocomposite formulation