A Saturated and Unsaturated Backbone of the Products from the Reaction of 1, 2-Diimine with Aluminum Precursors

2015 ◽  
Vol 641 (3-4) ◽  
pp. 521-524 ◽  
Author(s):  
Yingxin Ju ◽  
Zhi Yang ◽  
Xiaoli Ma ◽  
Ying Yang ◽  
Herbert W. Roesky
Keyword(s):  
Aluminum Precursors

Di(tert-butyl)phosphate Complexes of Aluminum:  Precursors to Aluminum Phosphate Xerogels and Thin Films

1999 ◽  
Vol 11 (6) ◽  
pp. 1615-1620 ◽  
Author(s):  
Claus G. Lugmair ◽  
T. Don Tilley ◽  
Arnold L. Rheingold
Keyword(s):  
Thin Films ◽  
Aluminum Phosphate ◽  
Tert Butyl ◽  
Aluminum Precursors

Hydrothermal Synthesis of Mesoporous Al2O3: Influences of pH Values and Aluminum Precursors

2012 ◽  
Vol 581-582 ◽  
pp. 396-400 ◽  
Author(s):  
Hui Ping Liu
Keyword(s):  
Hydrothermal Synthesis ◽  
Aluminum Sulfate ◽  
Reaction System ◽  
Diffraction Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ph Values ◽  
Glucose Water ◽  
Sulfate Crystal ◽  
Aluminum Precursors

The influences of pH values and aluminum precursors of “glucose-water-aluminum salt” reaction system on the hydrothermal synthesis of mesoporous Al2O3 were investigated. With the aid of scanning electron microscopy (SEM), electron diffraction spectrum (EDS) and X-ray diffraction (XRD) characterizations, we found that, under hydrothermal treatment at 180 °C for 20 h, aluminum nitrate (Al(NO3)3) could be used as the precursor to synthesize the spherical flower-like Al2O3 by using the synthesis solutions with different pH values in a certain scope; using aluminum chloride (AlCl3) as precursor, we can only get a small amount of Al2O3 composed of micro-spheres and sheets; while adopting aluminum sulfate (Al2(SO4)3) as precursor, a small amount of cubic-shape aluminum sulfate crystal can be obtained.

Fischer–Tropsch synthesis over alumina-supported cobalt catalysts: effects of different spray temperature of aluminum slurry

2016 ◽  
Vol 94 (5) ◽  
pp. 515-522
Author(s):  
Yan Liu ◽  
Litao Jia ◽  
Bo Hou ◽  
Debao Li
Keyword(s):  
Cobalt Catalyst ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
High Conversion Rate ◽  
Supported Cobalt Catalysts ◽  
Aluminum Precursor ◽  
Excellent Stability ◽  
Aluminum Precursors

Aluminum slurry was obtained by precipitating Al(NO3)3·9H2O and ammonium carbonate, and the slurry was dried by adopting spray means. The effects of different spray temperature on the as-synthesised aluminum precursors, calcined alumina, and the supported cobalt catalysts were investigated by the characterizations of SEM, XRD, TG-DTA, H2-TPD, H2-TPR, etc., and the activity and stability of the as-prepared catalysts for Fischer–Tropsch synthesis were also studied. It indicated that the aluminum precursor spray dried at 250 °C exhibited homogeneous microspheres, the calcined alumina exhibited single-particle size distribution and monomodal pore distribution, and the corresponding supported cobalt catalyst possessed proper cobalt particles (6.4 nm), which was benefitial for acquiring a high conversion rate (the turnover frequency is 17.2 × 10−3/s) and excellent stability (the deactivation rate is 0.31%) for Fischer–Tropsch synthesis.

scholarly journals Effect of Polymer Removal on the Morphology and Phase of the Nanoparticles in All-Inorganic Heterostructures Synthesized via Two-Step Polymer Infiltration

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 679
Author(s):  
Diana Berman ◽  
Yuchen Sha ◽  
Elena V. Shevchenko
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Inorganic Systems ◽  
Polymer Templates ◽  
Inorganic Composites ◽  
Polyvinyl Pyridine ◽  
Controlled Structure ◽  
Polymer Infiltration ◽  
Aluminum Precursors

Polymer templates play an essential role in the robust infiltration-based synthesis of functional multicomponent heterostructures with controlled structure, porosity, and composition. Such heterostructures are be used as hybrid organic–inorganic composites or as all-inorganic systems once the polymer templates are removed. Using iron oxide/alumina heterostructures formed by two-step infiltration of polystyrene-block-polyvinyl pyridine block copolymer with iron and aluminum precursors from the solution and vapor-phases, respectively, we show that the phase and morphology of iron oxide nanoparticles dramatically depend on the approach used to remove the polymer. We demonstrate that thermal and plasma oxidative treatments result in iron oxide nanoparticles with either solid or hollow morphologies, respectively, that lead to different magnetic properties of the resulting materials. Our study extends the boundaries of structure manipulations in multicomponent heterostructures synthesized using polymer infiltration synthesis, and hence their properties.

OMVPE of InAlAs Using Alternative Al and As Precursors

2014 ◽  
Vol 1635 ◽  
pp. 63-68
Author(s):  
Brittany L. Smith ◽  
Nichole M. Hoven ◽  
Glen Hillier ◽  
Seth M. Hubbard ◽  
David V. Forbes
Keyword(s):  
Mass Spectrometry ◽  
Vapor Phase ◽  
Growth Temperature ◽  
Secondary Ion Mass Spectrometry ◽  
Oxygen Impurity ◽  
Organometallic Vapor Phase Epitaxy ◽  
Growth Quality ◽  
Secondary Ion ◽  
Aluminum Precursors

ABSTRACTAlternate aluminum and arsenic precursors were investigated for InAlAs grown by organometallic vapor phase epitaxy (OMVPE). The quality of the InAlAs growths was investigated by secondary-ion mass spectrometry (SIMS) to measure impurity concentrations. Trends are extracted from SIMS measurements for each precursor as a function of V/III ratio and growth temperature. Two arsenic precursors, arsine and tertiarybutylarsine (TBAs), were chosen to compare InAlAs growth quality. The impurity concentrations measured by SIMS decrease as the V/III ratio increases, for both arsine and TBAs growths. Impurities also decrease as growth temperature increases. Two aluminum precursors, trimethylaluminum (TMAl) and tritertiarybutylaluminum (TTBAl), were used to compare the effect of alumimum precursor on carbon and oxygen impurity levels. TMAl is widely studied in literature, though TTBAl is less common. This study represents the first report using the TTBAl precursor for InAlAs growth. Each aluminum source is used in conjunction with each aforementioned arsenic precursor in order to compare all possible precursor combinations. TMAl growths demonstrated decreasing impurities with increasing V/III ratio. TTBAl growths did not exhibit such a dependence, impurity concentrations remained virtually constant regardless of V/III ratio.

Alumina with Various Pore Structures Prepared by Spray Pyrolysis of Inorganic Aluminum Precursors

2013 ◽  
Vol 52 (37) ◽  
pp. 13377-13383 ◽  
Author(s):  
Chang Liu ◽  
Yongchun Liu ◽  
Qingxin Ma ◽  
Jinzhu Ma ◽  
Hong He
Keyword(s):  
Spray Pyrolysis ◽  
Pore Structures ◽  
Aluminum Precursors

Aerosol-assisted synthesis of mesoporous aluminosilicate microspheres: the effect of the aluminum precursor

2016 ◽  
Vol 40 (5) ◽  
pp. 4420-4427 ◽  
Author(s):  
Sonia Fiorilli ◽  
Valentina Cauda ◽  
Lucia Pontiroli ◽  
Chiara Vitale-Brovarone ◽  
Barbara Onida
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Mesoporous Aluminosilicates ◽  
Mesoporous Aluminosilicate ◽  
Aqueous Conditions ◽  
Accessible Porosity ◽  
Aluminum Precursor ◽  
Spray Dried ◽  
Aluminum Precursors

Spray-dried mesoporous aluminosilicates, with spherical morphology, high surface area and accessible porosity, have been synthesized under mild acidic aqueous conditions by using different aluminum precursors.

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