STUDY OF THE USE OF TITANIUM HYDROXIDE AS AN INORGANIC SUPPORT FOR THE PREPARATION OF AFFINITY SORBENTS

1983 ◽  
pp. 303-304 ◽  
Author(s):  
Laszlo Boross ◽  
M. Lynn Pritchard
Keyword(s):  
Titanium Hydroxide ◽  
Inorganic Support

Microstructural Characterization of BaTiO3 Ceramic Nanoparticles Synthesized by the Hydrothermal Technique

2005 ◽  
Vol 106 ◽  
pp. 41-46 ◽  
Author(s):  
Xin Hua Zhu ◽  
Jian Min Zhu ◽  
Shun Hua Zhou ◽  
Zhi Guo Liu ◽  
Nai Ben Ming ◽  
...  
Keyword(s):  
Size Distribution ◽  
Grain Morphology ◽  
Microstructural Characterization ◽  
Barium Hydroxide ◽  
Structural Defects ◽  
Titanium Hydroxide ◽  
Hydrothermal Technique ◽  
Diffraction Contrast ◽  
Average Grain Size ◽  
Surface Facets

BaTiO3 (BT) nanoparticles were prepared by the hydrothermal technique using different starting materials and the microstructure examined by XRD, SEM, TEM and HRTEM. X-ray diffraction and electron diffraction patterns showed that the nanoparticles were the cubic BaTiO3 phase. The BT nanoparticles prepared from the starting materials of as-prepared titanium hydroxide and barium hydroxide have spherical grain morphology, an average size of 65 nm and a fairly narrow size distribution. A uniform diffraction contrast across each single grain is observed in the TEM images, and the clear lattice fringes (with d110 = 0.28 nm) observed in HRTEM images reveal that well-crystallized BT nanoparticles are synthesized by the hydrothermal method. The edges of the particles are very smooth, with no surface steps. BT nanoparticles with average grain size of 90 nm, synthesized using barium hydroxide and titanium dioxide as the starting materials, show surface facets. In this case a bimodal size distribution of large faceted and smaller particles is observed. Diffraction contrast variation across the particles caused by high strains within the particles is clearly observed. The high strains obviously stem from structural defects formed during hydrothermal synthesis, presumable in the form of lattice OH− ions and their compensation by cation vacancies. HRTEM images demonstrate that surface facets parallel to the (100) and (110) planes and small islands with 3 ~ 4 atomic layer thickness are frequently observed around the edge of the particles.

scholarly journals Hydrothermal synthesis of tetragonal barium titanate nanopowders under moderate conditions

2021 ◽  
Vol 15 (2) ◽  
pp. 179-183
Author(s):  
Huaxing Meng ◽  
Zhiwu Chen ◽  
Zhenya Lu ◽  
Xin Wang ◽  
Xiaoyi Fu
Keyword(s):  
Barium Titanate ◽  
Average Particle Size ◽  
Ammonia Solution ◽  
Average Particle ◽  
Titanium Hydroxide ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
Uniform Size ◽  
Dominant Structure ◽  
Hydrolysis Of

Monodispersed tetragonal barium titanate (BaTiO3) nanopowders were synthesized by a convenient hydrothermal route at a low temperature of 200?C in only 24 h. The key point of this method is to promote the generation of ultrafine titanium hydroxide precipitation precursors with the help of absolute ethyl alcohol and ammonia solution during the hydrolysis of Ti(OC4H9)4. The results of X-ray diffraction and Raman spectra show that the as-prepared BaTiO3 nanopowders possess tetragonal-dominant structure. The synthesized tetragonal BaTiO3 nanopowders exhibit relatively uniform size and good dispersity, with the average particle size of 96.1 nm and a tetragonality of 1.0073, which enable broad application prospects in the field of multilayer ceramic capacitors.

Organic/Inorganic Support for Immobilizing Cp2ZrCl2/ TiCl4 Hybrid Catalyst to Prepare Bimodal Polyethylene

2013 ◽  
Vol 699 ◽  
pp. 46-50
Author(s):  
Wei Li
Keyword(s):  
Toxic Effect ◽  
Ethylene Polymerization ◽  
Barrier Property ◽  
Hybrid Catalyst ◽  
Acrylic Copolymer ◽  
Inorganic Support ◽  
Bimodal Polyethylene

Organic/inorganic support for immobilizing hybrid catalyst (Cp2ZrCl2/ TiCl4) was devised. Silica was the inorganic part using in the immobilization of Cp2ZrCl2. Subsequently, styrene and acrylic copolymer (PSA) was coated on the silica. TiCl4 was finally supported on the PSA. PSA layer played obvious barrier ability to triethylaluminium (TEA) in the support which was observed by ethylene polymerization. This outstanding barrier property dramatically restrained the toxic effect of TEA to Cp2ZrCl2. Thus, the property of Cp2ZrCl2 could be maintained using cocatalyst TEA. Bimodal polyethylene was achieved cocatalysted by TEA.

Using an Inorganic Support

2007 ◽  
pp. 1
Author(s):  
K.-M. Roy
Keyword(s):  
Inorganic Support

Sorption of Molybdenum onto Titanium Hydroxide

2018 ◽  
Vol 60 (4) ◽  
pp. 386-394 ◽  
Author(s):  
E. I. Denisov ◽  
N. D. Betenekov
Keyword(s):  
Titanium Hydroxide

Titanium Hydroxide Secondary Building Units in Metal–Organic Frameworks Catalyze Hydrogen Evolution under Visible Light

2019 ◽  
Vol 141 (31) ◽  
pp. 12219-12223 ◽  
Author(s):  
Yang Song ◽  
Zhe Li ◽  
Yuanyuan Zhu ◽  
Xuanyu Feng ◽  
Justin S. Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Metal Organic Frameworks ◽  
Titanium Hydroxide ◽  
Secondary Building Units ◽  
Metal Organic

Supported gold catalysis derived from the interaction of a Au–phosphine complex with as-precipitated titanium hydroxide and titanium oxide

1998 ◽  
Vol 44 (1-4) ◽  
pp. 333-342 ◽  
Author(s):  
Youzhu Yuan ◽  
Kiyotaka Asakura ◽  
Anguelina P. Kozlova ◽  
Huilin Wan ◽  
Khirui Tsai ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Gold Catalysis ◽  
Titanium Hydroxide ◽  
Supported Gold ◽  
Phosphine Complex
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