One-Pot Synthesis and Characterization Studies of Iron Molybdenum Mixed Metal Oxide (Fe2(MoO4)3) Nano-Photocatalysts

2016 ◽  
Vol 8 (7) ◽  
pp. 566-572 ◽  
Author(s):  
K. Seevakan ◽  
A. Manikandan ◽  
P. Devendran ◽  
S. Arul Antony ◽  
T. Alagesan
Keyword(s):  
Metal Oxide ◽  
Synthesis And Characterization ◽  
Mixed Metal Oxide ◽  
One Pot ◽  
Mixed Metal ◽  
One Pot Synthesis ◽  
Characterization Studies

scholarly journals Synthesis, Modification, and Characterization of CuO/ZnO/ZrO2 Mixed Metal Oxide Catalysts for CO2/H2 Conversion

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1037 ◽  
Author(s):  
Ekaterina S. Borovinskaya ◽  
Sebastian Trebbin ◽  
Felix Alscher ◽  
Cornelia Breitkopf
Keyword(s):  
Metal Oxide ◽  
Acid Sites ◽  
Oxide Catalysts ◽  
Mixed Metal Oxide ◽  
One Pot ◽  
Wet Impregnation ◽  
Porous Texture ◽  
Mixed Oxide Catalysts ◽  
One Pot Synthesis ◽  
Temperature Programmed

CuO/ZnO/ZrO2 catalyst systems were synthesized in different ways and comprehensively characterized in order to study synthesis-to-property relations. A series of catalyst samples was prepared by coprecipitation, one-pot synthesis, and wet impregnation. The coprecipitation of multicomponent precipitates is usually a preliminary stage for preparation of mixed oxide catalysts. Cetyltrimethylammonium bromide (CTAB) was used in the surfactant-supported coprecipitation to improve the structural or textural characteristics of the catalytic samples. In the one-pot synthesis, all necessary components are simultaneously converted by evaporation from solutions into solids. During the wet impregnation, zirconium hydroxide is loaded with metal salts. After thermal treatment, all samples formed pure metal oxide forms, which was confirmed by XRD. The specific surface area of the investigated samples and their porous texture were determined by nitrogen adsorption. The reducibility of metal oxides and the kind of CuO phase was characterized by temperature-programmed reduction (TPR), and the surface acid properties by temperature-programmed ammonia desorption (TPAD). The CuO/ZnO/ZrO2 sample with the highest amount of strong acid sites is characterized by the formation of large CuO particles combined with the worst reducibility so that potentially catalytic active Cu/CuO pairs can be formed. One catalyst system was further characterized by in situ diffuse reflection Fourier transform infrared spectroscopy (DRIFTS) to identify surface intermediate species, which may occur during the conversion of CO2/H2 to methanol.

ZnO@SnO2 Mixed Metal Oxide as an Efficient and Recoverable Nanocatalyst for the Solvent Free Synthesis of Hantzsch 1,4-Dihydropyridines

2019 ◽  
Vol 16 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Bharatkumar M. Sapkal ◽  
Prakash K. Labhane ◽  
Shamrao T. Disale ◽  
Dhananjay H. More
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Reaction Times ◽  
Solvent Free ◽  
Catalyst Loading ◽  
Mixed Metal Oxide ◽  
One Pot ◽  
Mixed Metal ◽  
Solvent Free Conditions ◽  
Three Component Reaction

An efficient synthesis of Hantzsch 1,4-dihydropyridines via a one-pot three-component reaction of ethyl acetoacetate, substituted aldehydes and ammonium acetate in the presence of ZnO@SnO2 mixed metal oxide nanoparticles under solvent-free conditions has been reported. Compare to the reported reactions, this method shows attractive aspects such as cleaner reaction profile, shorter reaction times, minimum catalyst loading and high yields. Isolated catalysts were reused for new reactions without considerable loss of their catalytic activity.

Synthesis and characterization of versatile MgO–ZrO2 mixed metal oxide nanoparticles and their applications

2011 ◽  
Vol 1 (9) ◽  
pp. 1653 ◽  
Author(s):  
Manoj B. Gawande ◽  
Paula S. Branco ◽  
Kalpesh Parghi ◽  
Janhavi J. Shrikhande ◽  
Rajesh Kumar Pandey ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Synthesis And Characterization ◽  
Mixed Metal Oxide ◽  
Oxide Nanoparticles ◽  
Mixed Metal
Sign in / Sign up

Export Citation Format

Share Document