Synthesis and characterization of molybdenum catalysts supported on γ-Al[sub 2]O[sub 3]-CeO[sub 2] composite oxides

2012 ◽  
Author(s):  
Muhammad Farooq ◽  
Anita Ramli ◽  
Duvvuri Subbarao
Keyword(s):  
Synthesis And Characterization ◽  
Composite Oxides ◽  
Molybdenum Catalysts

scholarly journals Synthesis and characterization of some nanostructured composite oxides for low temperature catalytic combustion of dilute propane

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 27863-27871 ◽  
Author(s):  
C. Doroftei ◽  
L. Leontie
Keyword(s):  
Low Temperatures ◽  
Catalytic Combustion ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Synthesis And Characterization ◽  
Propane Combustion ◽  
Nanostructured Composite ◽  
Composite Oxides ◽  
Combustion Technique

Five nanosized perovskite and four ferrospinel powders were prepared by sol–gel self-combustion technique. The La0.6Pb0.2Mg0.2MnO3 perovskite was found to exhibit the best catalytic performance with respect to propane combustion at low temperatures.

scholarly journals Solvothermal synthesis and characterization of nanocrystalline vanadium-chromium composite oxides and catalytic ammoxidation of 2,6-dichlorotoluene

2018 ◽  
Vol 39 (11) ◽  
pp. 1814-1820 ◽  
Author(s):  
Yeying Huang ◽  
Tingcheng Li ◽  
Qingliang You ◽  
Xiangqian You ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
Synthesis And Characterization ◽  
Composite Oxides

Synthesis and Characterization of New Composite Oxides Related to the 2H-Perovskite Structure Type

1998 ◽  
Vol 547 ◽  
Author(s):  
J. B. Claridge ◽  
H.-C. zur Loye
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Structure Type ◽  
Magnetic Data ◽  
Antiferromagnetic Coupling ◽  
Synthesis And Characterization ◽  
Composite Oxides ◽  
Rhodium Oxides ◽  
Ordered State

AbstractThe synthesis, structural characterization, and magnetic properties of three strontium rhodium oxides Sr6Rh5O15, Sr4Rh3O9+δ, and Sr9Rh7O21+δ, is presented. While Sr6Rh5O15 is an example of a commensurate n = 1 member of the A3n+3A'nBn+3O6n+9 family of oxides, Sr4Rh3O9+δ, and Sr9Rh7O21+°, are examples of incommensurate n =2 and n = 3 members. Sr6Rh5O15 crystallizes in space group R32, a = 19.3197(2) Å, c = 13.0418(1) Å. The Sr6Rh5O15 structure is a superstructure of the Ba6Ni5O15 structure type. Sr4Rh3O9+δ, and Sr9Rh7P21+δ crystallize in the superspace group with lattice parameters of a = 9.6007(6), c1 = 2.6881(2), c2 = 4.2373(3), and a = 9.6127(6), c1 = 2.6769(2), c2 = 4.252(1), respectively. Their magnetic data are consistent with antiferromagnetic coupling between the chains leading to an ordered state at low temperature.

scholarly journals Synthesis And Characterization Of Nickel-Molybdenum Catalysts Supported On Copper Orthophosphates

2020 ◽  
Vol 948 ◽  
pp. 012023
Author(s):  
Ouchabi Mbarka ◽  
Baalala Mohammed ◽  
Elaissi Abdelkrim ◽  
Bensitel Mohammed
Keyword(s):  
Synthesis And Characterization ◽  
Molybdenum Catalysts

Mullite Composite Phase Nanocrystalline from High-Silica Kaolin under Normal Pressure and Temperature: An Experimental Study

2007 ◽  
Vol 280-283 ◽  
pp. 1157-1160 ◽  
Author(s):  
Nan Chun Chen ◽  
Dong Chen
Keyword(s):  
Crystallization Process ◽  
Normal Pressure ◽  
Synthesis And Characterization ◽  
Hydrothermal Crystallization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Composite Oxides ◽  
Pressure Tests ◽  
High Silica

The synthesis and characterization of mullite composite nanocrystaline from high-silica kaolin sampled from Tianyang County of Guangxi Zhuang Autonomous Region is presented in this paper. Rough kaolin is firstly grounded and processed to remove impurities, iron and carbon before burned to produce composite oxides with mullite as major components. The composite oxides are further synthesized into composite mullite nanocrystaline by using hydrothermal crystallization process under low temperature and normal pressure. Tests on the composite nanocrystalline by TEM, TG-TDA, and X-ray diffraction methods show that the nanocrystalline range in size from 40 to 100 nm and are well textured. They also show significantly enhanced thermal stability at temperature as high as 1000oC.

Synthesis and Characterization of Nanorods of Ni-Fe Composite Oxides

2012 ◽  
Vol 627 ◽  
pp. 800-803
Author(s):  
Xue Fei Li ◽  
Hong Wang
Keyword(s):  
Calcination Temperature ◽  
Amorphous Structure ◽  
Crystal Phase ◽  
Synthesis And Characterization ◽  
Metal Hydroxides ◽  
Microemulsion Method ◽  
Complex Metal ◽  
Composite Oxides ◽  
Fe Complex

Nanorods of Ni/Fe complex metal hydroxides precursor were fabricated by a microemulsion method. The nanorods were 20~30 nm in diameter and 600~1000 nm in length, with amorphous structure. Ni/Fe composite oxides were obtained by calcinations of Ni/Fe complex metal hydroxides precursor. At 500 °C, the sample retained the morphology of the nanorods, with the same diameter to the precursor and the length shortened to 300~400 nm. The crystal phase was composed of NiO and dispersed amorphous Fe2O3. When the calcination temperature was higher than 500 °C, the morphology of the nanorods of the precursor were collapsed to nanoparticles, and the crystal phase transformed to the mixture of NiO and NiFe2O4.

Synthesis and characterization of Mn-based composite oxides with enhanced electrocatalytic activity for oxygen reduction

2014 ◽  
Vol 2 (33) ◽  
pp. 13345-13351 ◽  
Author(s):  
Yin Xu ◽  
Haochen Jiang ◽  
Xiaoxiao Li ◽  
Han Xiao ◽  
Wei Xiao ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Shell Microstructure ◽  
Composite Oxides

Porous cubic spinel Mn1.5Co1.5O4 with onion-like core–shell microstructure were prepared, which showed enhanced electrocatalytic activity towards oxygen reduction.

Synthesis and characterization of new hydrodesulphurization Co–Mo catalysts supported on calcined and pyrolyzed bone

RSC Advances ◽  
2015 ◽  
Vol 5 (51) ◽  
pp. 40647-40656
Author(s):  
M. Emami Yazdani ◽  
B. H. Monjezi ◽  
M. Mokfi ◽  
H. Bozorgzadeh ◽  
A. Gil ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Impregnation Method ◽  
Molybdenum Catalysts ◽  
Calcined Bone

A series of cobalt–molybdenum catalysts supported on calcined bone (hydroxyapatite, HAP) and pyrolyzed bone (hydroxyapatite–carbon, HAP–C) have been prepared by an impregnation method.

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