Sol–Gel Synthesis and Magnetic Studies of Titanium Dioxide Doped with 10% M (M=Fe, Mn and Ni)

2005 ◽  
Vol 16 (4) ◽  
pp. 501-513 ◽  
Author(s):  
G. Glaspell ◽  
A. Manivannan
Keyword(s):  
Titanium Dioxide ◽  
Sol Gel ◽  
Magnetic Studies ◽  
Sol Gel Synthesis

Composition and Properties of TiO2 Sol to Produce a Photocatalytic Composite Material

2020 ◽  
Vol 854 ◽  
pp. 45-50
Author(s):  
Ekaterina N. Gubareva ◽  
Valeria V. Strokova ◽  
Yulia N. Ogurtsova ◽  
Pavel S. Baskakov ◽  
Lok Pratap Singh
Keyword(s):  
Composite Material ◽  
Titanium Dioxide ◽  
Ethyl Alcohol ◽  
Titanium Dioxide Nanoparticles ◽  
Sol Gel ◽  
Component Composition ◽  
Optimal Composition ◽  
Optimal Ratio ◽  
Nanosized Titanium Dioxide ◽  
Sol Gel Synthesis

The paper presents the process of sol-gel synthesis of titanium dioxide nanoparticles, the peculiarities of the influence of component composition (titanium precursor content, solvent and stabilizer − surfactant) on the properties of sol and powder obtained on its basis. As a result of the study, the nature of the influence of the type and content of the surfactant in the solution of tetrabutoxytitanium in ethanol on the size of the synthesized particles of titanium dioxide was revealed. The optimal composition of the reaction mixture of TiO–R sol was obtained and the optimal ratio of tetrabutoxytitanium and ethyl alcohol was revealed using which a material with a high content of nanosized titanium dioxide was obtained.

Environmental assessment of a bottom-up hydrolytic synthesis of TiO2 nanoparticles

2015 ◽  
Vol 17 (1) ◽  
pp. 518-531 ◽  
Author(s):  
Martina Pini ◽  
Roberto Rosa ◽  
Paolo Neri ◽  
Federica Bondioli ◽  
Anna Maria Ferrari
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
Environmental Assessment ◽  
Sol Gel ◽  
Lca Methodology ◽  
Bottom Up ◽  
Sol Gel Synthesis

A green metrics evaluation of the bottom-up hydrolytic sol–gel synthesis of titanium dioxide (TiO2) nanoparticles has been performed by following two different approaches, namely, EATOS software and LCA methodology.

scholarly journals Dielectric Properties and Characterisation of Titanium Dioxide Obtained by Different Chemistry Methods

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Aleksandra Wypych ◽  
Izabela Bobowska ◽  
Milena Tracz ◽  
Agnieszka Opasinska ◽  
Slawomir Kadlubowski ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
Elevated Temperatures ◽  
Sol Gel ◽  
Factors Affecting ◽  
Broadband Dielectric Spectroscopy ◽  
Higher Temperature ◽  
20 Nm ◽  
Sol Gel Synthesis

We made comparison of titanium dioxide powders obtained from three syntheses including sol-gel and precipitation methods as well as using layered (tetramethyl)ammonium titanate as a source of TiO2. The obtained precursors were subjected to step annealing at elevated temperatures to transform into rutile form. The transformation was determined by Raman measurements in each case. The resulting products were characterised using Raman spectroscopy and dynamic light scattering. The main goal of the studies performed was to compare the temperature of the transformation in three titania precursors obtained by different methods of soft chemistry routes and to evaluate dielectric properties of rutile products by means of broadband dielectric spectroscopy. Different factors affecting the electrical properties of calcinated products were discussed. It was found that sol-gel synthesis provided rutile form after annealing at 850°C with the smallest particles size about 20 nm, the highest value of dielectric permittivity equal to 63.7, and loss tangent equal to 0.051 at MHz frequencies. The other powders transformed to rutile at higher temperature, that is, 900°C, exhibit lower value of dielectric permittivity and had a higher value of particles size. The correlation between the anatase-rutile transformation temperature and the size of annealed particles was proposed.

scholarly journals Sol-Gel Synthesis of Nonstoichiometric Titanium Dioxide for Photo-Oxidation of Toxic Organic Substances

2020 ◽  
Author(s):  
I. B. Dorosheva ◽  
A. A. Rempel ◽  
A. A. Valeeva ◽  
I. A. Weinstein
Keyword(s):  
Titanium Dioxide ◽  
Specific Surface ◽  
Band Gap ◽  
Surface Area ◽  
Specific Surface Area ◽  
Anatase Phase ◽  
Sol Gel ◽  
Bet Method ◽  
Sol Gel Synthesis ◽  
Toxic Organic Substances

Titanium dioxide (TiO2) was synthesized by sol-gel method at different values of pH = 3, 7, 8, 9, or 10. X-ray phase analysis has shown that in an acid rout, an anatase phase had crystallized, and in an alkaline rout an amorphous phase of TiO2 was achieved. After annealing for 4 hours at 350∘C, all samples were transformed into anatase phase. The particle size in the different samples varies from 7 to 50 nm depending on the pH. The diffuse reflectance spectra revealed a high value of the band gap width in the range from 2.9 to 3.4 eV and its narrowing after annealing to the range from 2.8to 3.1 eV. The specific surface area measured by BET method was changing from 80 up to 140 m2 /g. Keywords: Titanium dioxide, nanostructure, photocatalysis, band gap, specific surface area

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