NaX zeolite framework containing of magnetic MgFe2O4/CdO nanoparticles: synthesis, characterization and catalytic performance in the decontamination of 2-chloroethyl phenyl sulfide (2-CEPS) as a model of sulfur mustard agent

2021 ◽  
Author(s):  
Meysam Sadeghi ◽  
Saeed Farhadi ◽  
Abedien Zabardasti
Keyword(s):  
Sulfur Mustard ◽  
Catalytic Performance ◽  
Zeolite Framework ◽  
Phenyl Sulfide ◽  
Nax Zeolite ◽  
Cdo Nanoparticles ◽  
Nanoparticles Synthesis ◽  
Nanocomposite Catalyst ◽  
Ultrasonic Assisted ◽  
Magnetically Separable

The present study highlights the successful fabrication of the zeolite NaX/MgFe2O4/CdO magnetically separable nanocomposite catalyst via the ultrasonic-assisted hydrothermal strategy for the decontamination of sulfur mustard agent simulant 2-chloroethyl phenyl...

scholarly journals Copper nanoparticles synthesis in hybrid mesoporous thin films: Controlling oxidation state and catalytic performance through pore chemistry

2019 ◽  
Vol 471 ◽  
pp. 862-868 ◽  
Author(s):  
Rusbel Coneo Rodríguez ◽  
Luis Yate ◽  
Emerson Coy ◽  
Ángel M. Martínez-Villacorta ◽  
Andrea V. Bordoni ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxidation State ◽  
Copper Nanoparticles ◽  
Catalytic Performance ◽  
Mesoporous Thin Films ◽  
Nanoparticles Synthesis

The Effects of Preparation Methods on Iron Structures of Iron-Supported HZSM-5 and their Catalytic Performance for Methanol Dehydration

2016 ◽  
Vol 723 ◽  
pp. 633-639
Author(s):  
Waenkaew Pantupho ◽  
Arthit Neramittagapong ◽  
Nuttawut Osakoo ◽  
Jatuporn Wittayakun ◽  
Sirinuch Loiha
Keyword(s):  
Flow Reactor ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Active Species ◽  
Iron Complex ◽  
Methanol Dehydration ◽  
Low Carbon ◽  
Zeolite Framework ◽  
Preparation Methods ◽  
Binuclear Iron

Iron-supported HZSM-5 catalysts were prepared by hydrothermal (Fe-HZSM-5_HYD) and impregnation methods (Fe/HZSM-5_IMP). The active species of binuclear-iron complex and iron-substituted zeolite framework, confirmed by EXAFS analysis, were observed on Fe/HZSM-5_IMP and Fe-HZSM-5_HYD, respectively. The catalysts were used for production of dimethyl ether (DME) by methanol dehydration at 200-350 °C using fixed bed flow reactor. Fe/HZSM-5_IMP showed higher catalytic conversion than Fe-HZSM-5_HYD. However, the Fe/HZSM-5_IMP catalyst was less selective to DME product and strongly deactivated for 24h. The deactivation might due to transformation of binuclear-iron to the a-iron site which was strong acidic strengh. The iron-substituted zeolite framework of Fe-HZSM-5_HYD showed high stability toward methanol dehydration. Moreover, the catalyst showed advantages of good selective to DME and low carbon deposition on surface. These results suggested that the iron-substituted zeolite framework structure could improve catalytic performance for mrthanol dehydration.

scholarly journals Synthesis of Hollow Flower-Like Fe3O4/MnO2/Mn3O4 Magnetically Separable Microspheres with Valence Heterostructure for Dye Degradation

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 589 ◽  
Author(s):  
Mingliang Ma ◽  
Yuying Yang ◽  
Yan Chen ◽  
Fei Wu ◽  
Wenting Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Organic Contaminants ◽  
Dye Degradation ◽  
Catalytic Performance ◽  
X Ray ◽  
Composite Microspheres ◽  
Magnetically Separable ◽  
Mno2 Nanosheet

In this manuscript, hollow flower-like ferric oxide/manganese dioxide/trimanganese tetraoxide (Fe3O4/MnO2/Mn3O4) magnetically separable microspheres were prepared by combining a simple hydrothermal method and reduction method. As the MnO2 nanoflower working as precursor was partially reduced, Mn3O4 nanoparticles were in situ grown from the MnO2 nanosheet. The composite microspheres were characterized in detail by employing scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), vibration sample magnetometer (VSM) and UV–visible spectrophotometer (UV–vis). Under visible light conditions, the test for degrading rhodamine B (RhB) was used to verify the photocatalytic activity of the photocatalyst. The results showed that the efficiency of the Fe3O4/MnO2/Mn3O4 photocatalyst in visible light for 130 min is 94.5%. The catalytic activity of photocatalyst far exceeded that of the Fe3O4/MnO2 component, and after four cycles, the catalytic performance of the catalyst remained at 78.4%. The superior properties of the photocatalyst came from improved surface area, enhanced light absorption, and efficient charge separation of the MnO2/Mn3O4 heterostructure. This study constructed a green and efficient valence heterostructure composite that created a promising photocatalyst for degrading organic contaminants in aqueous environments.

Ultrafine Pd Nanoparticles Synthesis and Catalytic Performance in Methane Partial Oxidation

2011 ◽  
Vol 284-286 ◽  
pp. 1905-1908
Author(s):  
Bao Song Fu ◽  
Hu Liu ◽  
Guo Min Xiao
Keyword(s):  
Partial Oxidation ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Methane Partial Oxidation ◽  
Narrow Size Distribution ◽  
Pd Nanoparticle ◽  
Partial Oxidation Reaction ◽  
Nanoparticles Synthesis

Narrow size distribution Palladium nanoparticles was synthesized by adding Pd precursor into a modified PMHS polymer solution, and then jelled by aluminium. The multi-functional polymer was characterized by NMR; Pd nanoparticle samples were characterized by TEM and catalytic activity was tested in methane partial oxidation reaction.

Fabrication of a novel magnetic CdS nanorod/NiFe2O4/NaX zeolite nanocomposite with enhanced sonocatalytic performance in the degradation of organic dyes

2020 ◽  
Vol 44 (20) ◽  
pp. 8386-8401 ◽  
Author(s):  
Meysam Sadeghi ◽  
Saeed Farhadi ◽  
Abedin Zabardasti
Keyword(s):  
Organic Dyes ◽  
Nax Zeolite ◽  
Cds Nanorods ◽  
Ternary Nanocomposite ◽  
Magnetically Separable

Herein, magnetically separable CdS nanorods (NRs)/NiFe2O4/NaX zeolite ternary nanocomposite was fabricated and applied for the enhanced sonocatalytic degradation of organic dyes.

Liquid-Phase Selective Hydrogenation of Nitrobenzene over Ultrasonic-Assisted Ni-Mo-P Amorphous Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 420-423 ◽  
Author(s):  
Qian Wen Dai ◽  
Zi Li Liu ◽  
Cui Xia Xu ◽  
Qi Gang Xie ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Selective Hydrogenation ◽  
Active Sites ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Catalytic Performance ◽  
Chemical Reduction Method ◽  
Ultrasonic Assisted ◽  
Optimal Reaction

The Ni-Mo-P amorphous catalysts were prepared by chemical reduction method under different sonication conditions. The catalytic performance of the prepared catalysts in selective hydrogenation of nitrobenzene(NB) to aniline(AN) were characterized by XRD, BET, N2-adsorption, H2-TPR and H2-TPD. The results show that the introduction of ultrasonic can improve the dispersion of the active sites in the catalyst, the particle size of the catalyst is also smaller than the regular prepared Ni-Mo-P amorphous catalyst. And the influences of the sonication power and time on the catalysts were discussed and compared. The optimal sonication condition is 70 W within 25 min, its optimal reaction time is 150 min.

Probing the relevance of MoO2 nanoparticles’ synthesis on their catalytic activity by inelastic neutron scattering

2020 ◽  
Vol 22 (2) ◽  
pp. 896-904 ◽  
Author(s):  
Carla D. Nunes ◽  
Svemir Rudić ◽  
Pedro D. Vaz
Keyword(s):  
Catalytic Activity ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Catalytic Performance ◽  
Inelastic Neutron ◽  
Surface Species ◽  
Nanoparticles Synthesis

Shelled and unshelled MoO2 nanoparticles were synthesized by different protocols yielding dramatic changes in catalytic performance. Inelastic neutron scattering was a valuable tool in probing surface species that were responsible for those changes.

Fabrication of magnetically separable ruthenium nanoparticles decorated on channelled silica microspheres: Efficient catalysts for chemoselective hydrogenation of nitroarenes

2021 ◽  
Author(s):  
Gauravjyoti D. Kalita ◽  
Manash R. Das ◽  
Pankaj Das
Keyword(s):  
Catalytic Performance ◽  
Ruthenium Nanoparticles ◽  
Silica Microspheres ◽  
Chemoselective Hydrogenation ◽  
Magnetically Separable

Magnetic mesoporous Ru nanoparticle decorated catalysts equipped with nanochannels for chemoselective hydrogenation of nitroarenes to amine: influence of nano-channeling on catalytic performance.

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