Primary hydrolysis products of methacrylate-modified titanium and zirconium alkoxides

“…4,5,9,10 Addition of water to these organically modified metal alkoxide complexes leads to hydrolysis of alkoxy groups and condensation reactions resulting in inorganic networks, 5 as follows:…”

Section: Introductionmentioning

confidence: 99%

Complexation of titanium alkoxides with pentenoic acid and allylacetoacetate and their hydrolysis and addition reactions with H‐silanes

Kayan

Hoebbel

Schmidt

2004

J of Applied Polymer Sci

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Complexation reactions of titanium tetraethoxide [Ti(OEt) 4 ] and titanium tetra-n-butoxide [Ti(OBu n ) 4 ] with 3-pentenoic acid (PA) and allylacetoacetate (AAA), in a 1 : 1M ratio, were studied in ethanol solution at room temperature.13 C-NMR and FTIR spectra showed that all PA and AAA completely reacted with both titanium alkoxides. Hydridosilane compounds such as triethoxysilane and triethylsilane were added to titanium chelate complexes in a 1 : 1M ratio. The investigation of products by 13 C-and 29 Si-NMR and FTIR showed additions of -SiH to the CAC double bond. The hydrolysis of titanium-PA and AAA complexes, by water in 1 : 4 ratios, resulted in released PA in an amount of 10% and AAA of 20%. The stability of hydrolyzed products was investigated by 13 C-NMR, 29 Si-NMR, and FTIR.

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“…In this analysis we also found that primary particles are in nanosize due to the presence of EDTA which controls the precipitation rate by adsorbing the primary particles and preventing them from growing. It is well known that in preparing TiO 2 nanopowder, bidentate ligands are always used to control the reactivity of metal alkoxides [15]. Ligand functionality served as a versatile tool to control the assembly behaviour of titania nanocrystals [16].…”

Section: Morphologymentioning

confidence: 99%

Synthesis of TiO2 nanopowders from red gypsum using EDTA as complexing agent

Borhan¹,

Nee²

2014

J Nanostruct Chem

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TiO 2 white pigments were used in various applications due to their magnificent optical and electronic properties. In this paper TiO 2 was recovered from red gypsum which is a waste generated at TiO 2 production industry. The effect of time and temperature in sulphuric acid leaching processes was optimized. TiO 2 powders were synthesized through thermal precipitation process with the presence of ethylenediaminetetraacetic acid as a complexing and purification agent. The obtained powders were characterized by X-ray diffraction, transmission electron microscope, UV-Vis spectroscopy and inductively coupled plasma optical emission spectroscopy. Experimental results show that powders in anatase form have a 3.2 eV band gap with a crystallite size 30-50 nm.

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Primary hydrolysis products of methacrylate-modified titanium and zirconium alkoxides

Cited by 134 publications

References 0 publications

Complexation of Zirconium Alkoxides with 3-Pentenoic Acid and Hydrolytic Stability of Their Products

Complexation of Zirconium Alkoxides with 3-Pentenoic Acid and Hydrolytic Stability of Their Products

Complexation of titanium alkoxides with pentenoic acid and allylacetoacetate and their hydrolysis and addition reactions with H‐silanes

Synthesis of TiO2 nanopowders from red gypsum using EDTA as complexing agent

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