Organometallic Titanium Oxides Obtained by Low-Pressure Plasmas of Water on Titanium Tetrapropoxide

González-Salgado, Francisco; Cruz, Guillermo J.; Olayo, M. G.; García-Rosales, G.; Gómez, Lidia Ma.

doi:10.4236/ampc.2012.24032

Cited by 2 publications

(1 citation statement)

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“…In plasma syntheses, commercially pure titanium oxidized in Ar/O mixtures [14] and TTIP degraded in resistive coupling discharges [15] have been used. Plasma degradation of titanium tetrapropoxide (TTP), Ti(-O-CH 2 -CH 2 -CH 3 ) 4 , to produce organometallic particles has also been focused on the electric properties and on the amorphous structure of the particles [16,17]. Now, in this work, the chemical structure of TiO particles synthesized by plasma glow discharges of TTP and water in gas-phase is studied with IR and XPS spectroscopies with the objective of exploring the different steps of TTP degradation under the plasma collisions which promote the formation of TiO organometallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Chemical Structure of TiO Organometallic Particles Obtained by Plasma

Olayo¹,

González-Salgado²,

Cruz³

et al. 2013

ANP

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This work presents a study about the chemical structure of titanium oxide (TiO) particles synthesized by plasmas using titanium tetrapropoxide, Ti(-O-CH 2 -CH 2 -CH 3 ) 4 . In plasmas, practically all chemical bonds are susceptible to participate in the reactions producing different results than those obtained by the traditional chemical routes. The particles obtained this way are semispheres and fibers grouped in random and layered structures in the 120 -500 nm interval and mean diameter of 86.4 nm (fibers) and 308.6 nm (semispheres). The analysis of the resulting TiO structure was performed by IR and XPS finding that the main chemical state of Ti in these conditions was O 2 -Ti-O 2 (Ti surrounded by O) which is part of the precursor structure, however, in O, the main chemical state was Ti-O-Ti formed with the rupture of the precursor Ti-O-C bonds. These last bonds reduce the conjugation between the structure of both elements, O 2 -Ti-O 2 and Ti-O-Ti, to produce organometallic compounds. Other chemical states appeared showing consecutive dehydrogenation steps during the synthesis with the formation of multiple bonds as a consequence of the continuous collisions in the plasma. These results allow us to follow the chemical reactions promoted by this kind of plasmas to produce TiO nanoparticles which are essentially conformed of intensive dehydrogenation.

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Section: Introductionmentioning

confidence: 99%