Synthesis and Characterization of SrO-Supported Al2O3 Applied as Heterogeneous Catalys

In this work, samples of 15 mol% Sr-doped Al2O3 were synthesized by Pechini's method and calcined at 900°C. DRX analysis showed that only corundum phase is present, and no shift on the main peaks was observed, suggesting that the additive is preferentially located on the surface of nanoparticles as a surface excess. SrO show high basic character and is applied as heterogeneous catalyst in transesterification of soybean oil to produce biodiesel. Since SrO is difficult to obtain through Pechinis method, due to high stability of SrCO3, the use of Al2O3 as a catalyst support produced via polymeric precursor was studied, and the reaction of transesterification was successfully made, because the crystallization of strontium carbonate on the corundum surface was avoided using the washing procedure. Also, the catalyst was characterized by DSC, isoelectric point and surface area.

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Hydrocracking of pyrolyzed α-cellulose to hydrocarbon over MxOy/Mesoporous carbon catalyst (M = Co and Mo): Synthesis and characterization of carbon-based catalyst support from saw waste of Merbau wood

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2020.103735 ◽

2020 ◽

Vol 8 (3) ◽

pp. 103735 ◽

Cited By ~ 1

Author(s):

Darma Santi ◽

Triyono ◽

Wega Trisunaryanti ◽

Iip Izul Falah

Keyword(s):

Mesoporous Carbon ◽

Catalyst Support ◽

Synthesis And Characterization ◽

Carbon Catalyst ◽

Carbon Based

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Synthesis and Characterization of Novel Zr-Al2O3 Nanoparticles Prepared by Microemulsion Method and Its Use as Cobalt Catalyst Support for the CO Hydrogenation Reaction

Synthesis and Catalysis Open Access ◽

10.4172/2574-0431.100015 ◽

2017 ◽

Vol 02 (02) ◽

Cited By ~ 2

Author(s):

Fatima Pardo-Tarifa ◽

Saul Cabrera ◽

Margarita Sanchez-Dominguez ◽

Robert Andersson ◽

Magali Boutonnet

Keyword(s):

Cobalt Catalyst ◽

Co Hydrogenation ◽

Catalyst Support ◽

Hydrogenation Reaction ◽

Synthesis And Characterization ◽

Al2o3 Nanoparticles ◽

Microemulsion Method

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Synthesis and Characterization of Carbon Nanostructures as Catalyst Support for PEMFCs

Journal of The Electrochemical Society ◽

10.1149/1.2409867 ◽

2007 ◽

Vol 154 (3) ◽

pp. B310 ◽

Cited By ~ 10

Author(s):

Sadesh Kumar Natarajan ◽

Daniel Cossement ◽

Jean Hamelin

Keyword(s):

Carbon Nanostructures ◽

Catalyst Support ◽

Synthesis And Characterization

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Synthesis and characterization of Li2ZnTi3O8 spinel using the modified polymeric precursor method

Materials Chemistry and Physics ◽

10.1016/s0254-0584(03)00144-5 ◽

2003 ◽

Vol 82 (1) ◽

pp. 68-72 ◽

Cited By ~ 27

Author(s):

M.S.C. Câmara ◽

P.N. Lisboa-Filho ◽

M.D. Cabrelon ◽

L. Gama ◽

W.A. Ortiz ◽

...

Keyword(s):

Synthesis And Characterization ◽

Polymeric Precursor Method ◽

Polymeric Precursor ◽

Precursor Method

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Synthesis and Characterization of Amorphous SiO2 Nanowires Derived from a Polymeric Precursor

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.18153 ◽

2008 ◽

Vol 8 (2) ◽

pp. 997-1002

Author(s):

Junping Li ◽

Zhijie Zhang ◽

Yongming Luo ◽

Li Guo ◽

Zemin Xie

Keyword(s):

Contact Angle ◽

Normal Form ◽

Smooth Surface ◽

Synthesis And Characterization ◽

Polymeric Precursor ◽

Vapor Liquid Solid ◽

Amorphous Sio2 ◽

Sem Study ◽

Electronic Microscope

Bulk quantity and long-scale amorphous SiO2 nanowires have been prepared simply by direct pyrolysis of an iron-modified perhydropolysilazane (Fe-PHPS) at 1300 °C in the flowing Ar atmosphere. Scanning electronic microscope (SEM) study shows that most SiO2 nanowires have smooth surface and they consist of straight and smoothly curved parts, with diameters in the range of 50 to 200 nm and lengths up to 200 μm. Beside this normal form of SiO2 nanowires via the typical vapor-liquid-solid (VLS) mechanism, four other different helical forms of nanowires, named spring-shaped nanowires, twinborn nanospring, fishbone-shaped nanowires and braided-like helical SiO2 nanowires, are also observed. The formation of these nanowires is proposed to be the modulated contact angle anisotropy (CAA) mechanism based on the VLS mechanism.

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Synthesis, Rheological Behavior and Mechanical Characterization of Structural Fast-Setting Geopolymers

Materials Science Forum ◽

10.4028/www.scientific.net/msf.498-499.488 ◽

2005 ◽

Vol 498-499 ◽

pp. 488-493

Author(s):

Antonio Eduardo Martinelli ◽

D.M.A. Melo ◽

E.P. Marinho ◽

T.W.J. Batista ◽

R.G.S. Araújo ◽

...

Keyword(s):

Potassium Hydroxide ◽

Room Temperature ◽

Mechanical Characterization ◽

Potassium Hydroxide Solution ◽

Inorganic Materials ◽

Molar Ratio ◽

Synthesis And Characterization ◽

Polymeric Precursor ◽

Rheological Characterization

Geopolymers are inorganic materials with ceramic characteristics that can be synthesized at room temperature from the setting of slurries. Their structure consists of aluminosilicate units that polymerize in alkaline environment. The setting rate and mechanical behavior of geopolymers strongly depends on the SiO2:Al2O3 molar ratio, polymeric precursor and polymerization cation. The present work reports the synthesis and characterization of 3.5:1 (SiO2:Al2O3) structural geopolymers prepared using either metakaolin (GPMK) or kaolin (GPK) as geopolymeric precursor in potassium hydroxide solution. GPMK depicted quick setting whereas GPK set only after 4 hours. The rheological characterization of the slurries revealed that plastic viscosity and yield point of GPK were 0.40 Pa.s and 14.2 Pa, respectively, whereas GPMK set instantly. The compressive strength of both geopolymers were measured after 24 hours and resulted in similar results, i.e., 4.6 MPa for GPMK and 4.4 MPa for GPK. The strength of both geopolymers was compatible to values typical of structural materials.

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