Titanium dioxide is a titanium oxide with the formula TiO2. A naturally occurring oxide sourced from ilmenite, rutile and anatase, it has a wide range of applications. It has a role as a food colouring. Titanium dioxide, also known as titanium (IV) oxide or titania, is …

Simple sol-gel route was used to synthesis the TiO2 nanoparticles and examined by X-ray diffraction (XRD). The small particle size and uniform morphology of the TiO2 were found at different calcination temperatures. The kinetic study of phase changes from the anatase to rutile using the X-ray diffraction data with Avrami equation was investigated.

[Composites of peptide nucleic acids with titanium dioxide nanoparticles. III. Kinetics of PNA dissociation from nanocomposites containing DNA/PNA duplexes] Bioorg Khim. May-Jun 2014;40(3):286-92. doi: 10.1134/s1068162014030030. [Article in Russian] Authors R N ...

Photocatalytic degradation of the herbicide erioglaucine in the presence of nanosized titanium dioxide: comparison and modeling of reaction kinetics. Daneshvar N(1), Salari D, Niaei A, Khataee AR. Author information: (1)Water and Wastewater Treatment Research Laboratory, Department of Applied Chemistry, University of Tabriz, Tabriz, Iran. nezam ...

Kinetic study of the chlorination of titanium dioxide (rutile and anatase) was carried out in a fixedbed reactor at temperature ranging from 800 °C to 1000 °C and normal pressure. In our experiment, titanium dioxide powder and gaseous chlorine with carbon or carbon monoxide as reductant were used. The products of the reaction are all in gaseous phase under the temperatures and pressure ...

Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(II) oxide at the surface of TiO2. Dillert R(1), Engel A, Große J, Lindner P, Bahnemann DW. ... -induced oxidation in the presence of molecular oxygen and a photocatalytically active building material which uses titanium dioxide as the photocatalyst. Herein ...

Influence of ionic strength, pH, and cation valence on aggregation kinetics of titanium dioxide nanoparticles Environ Sci Technol. 2009 Mar 1;43(5):1354-9. doi: 10.1021/es802628n. Authors Rebecca A French 1, Astrid R Jacobson, Bojeong Kim, Sara L Isley, R Lee Penn, Philippe C …

This study deals with the influence of nanosized titanium dioxide (TiO 2) catalysts on the decomposition kinetics of ammonium nitrate (AN) and ammonium nitrate‐based composite solid propellant.TiO 2 nanocatalyst with an average particle size of 10 nm was synthesized by sol‐gel method using titanium alkoxide as precursor. Formation of nanostructured TiO 2 and presence of its anatase …

Kinetics, Selectivity, and Deactivation in the Aldol Condensation of Acetaldehyde on Anatase Titanium Dioxide. Industrial & Engineering Chemistry Research 2011, 50 (1), 41-51.

The present work reports isothermal gas/solid equilibration kinetics for Nb-doped TiO2 (0.65 atom %) at elevated temperatures (1073−1298 K) within narrow ranges of oxygen activity spanning between 10-13 Pa and 75 kPa. The equilibration kinetics were monitored using electrical conductivity measurements. The kinetic data were used to determine the chemical diffusion coefficient (Dchem). …

Titanium levels in control (vehicle-exposed) animals were near and below the detection limits in all investigated tissues.The blood kinetics of IV-administered titanium dioxide (single and repeated exposure) in male rats are presented in Figures 4 A and B. Analysis of titanium in blood revealed a rapid decline of titanium levels.

Titanium dioxide (TiO 2 ) is widely used as a pigment, additive in food, and personal care. The properties and applications of titanium dioxide vary with crystal structure. In this study, in situ high-temperature X-ray diffraction was used to examine the effect of silicon doping on the phase-transition kinetics of titanium dioxide.

Titanium dioxide (TiO 2) is widely used as a pigment, additive in food, and personal care.The properties and applications of titanium dioxide vary with crystal structure. In this study, in situ high-temperature X-ray diffraction was used to examine the effect of silicon doping on the phase-transition kinetics of titanium dioxide.

Kinetics of the photocatalytic degradation of methylene blue on titanium dioxide. The first step of the photocatalytic degradation of methylene blue () on anatase is photocatalytic reduction with subsequent decomposition of the dye itself and its leucobase. At low catalyst concentrations (≤2 g/L), the dye decomposition rate constant ...

This article deals with the kinetic of thermal degradation and thermal stability of natural rubber (NR) filled with titanium dioxide (TiO 2) nanoparticles.Incorporation of TiO 2 nanoparticles was done through a latex mixing method. This is to ensure the homogeneity of TiO 2 nanoparticles throughout the NR matrix. Adding TiO 2 nanoparticles results in shifting the decomposition temperature and ...

12%Kinetics of the photocatalytic degradation of methylene blue on titanium dioxide. The first step of the photocatalytic degradation of methylene blue () on anatase is photocatalytic reduction with subsequent decomposition of the dye itself and its leucobase. At low catalyst concentrations (≤2 g/L), the dye decomposition rate constant ...

The photocatalytic degradation of five selected organophosphorus pesticides (OPPs), azinphos methyl, azinphos ethyl, disulfoton, dimethoate, and fenthion, has been investigated using TiO2 (photocatalyst) and UV irradiation. The addition of H2O2 (oxidant agent) into the illuminated aquatic suspensions was also surveyed. The degradation kinetics was studied under different experimental ...

The kinetic equation can predict the concentration of 4-NP during the entire degradation process at pH value of 4.3 and TiO2 concentration of 2 g l-1, and is therefore, more meaningful. It can be used in the development of large-scale photocatalytic reactor and optimization of experimental conditions For any particular studies.

Currently, the global yearly production of titanium dioxide is approximately 6 million tons, and its demand grows continuously by an average of 2.5% per year [].Ilmenite is a widespread raw material for the production of titanium dioxide by both the chloride [2,3,4] and sulfate methods.Sulfuric acid leaching of mineral rocks and concentrates containing titanium is a common method for the ...

The degradation of MAT followed an apparent first-order kinetics. Near complete mineralization of MAT from 10 mg/L was achieved in 180 min with 0.1 g/L of TiO2 at pH 5, by which the organic nitrogen was converted to NH4(+) and NO3(-).

4a-4d are related to titanium dioxide nanoparticles, polypyrrole/titanium dioxide composite, pure polyvinyl alcohol and polypyrrole/titanium dioxide nanocomposite in presence of polyvinyl alcohol. The large peak at the wavelength 669 Cm-1 was ascribed to Ti-O bond (Fig. 4a). In Fig. 4b (FTIR spectra of polypyrrole/titanium dioxide composite ...

Titanium dioxide (TiO 2) coating of surfaces is a promising infection control measure, though to date has not been tested against SARS-CoV-2. Methods: Virus stability was evaluated on TiO 2 - and TiO 2 –Ag (Ti:Ag atomic ratio 1:0.04)-coated 45 x 45 mm ceramic tiles. After coating the tiles were stored for 2–4 months before use.

the kinetics of the fading of the widely used artists' pigment, alizarin lake, incorpo-rating in this study many of the variables in the formulation of paint films. A few of the principal experimental results will be reported here for the case of opaque paint films made with a mixture of alizarin lake and titanium dioxide white pigment ...

1. Nanotoxicology. 2015;9(8):1050-8. doi: 10.3109/17435390.2015.1015644. Epub 2015 May 4. Pulmonary clearance kinetics and extrapulmonary translocation of seven titanium dioxide nano- and submicron materials following intratracheal administration in rats.

In this study, antimicrobial activity of titanium dioxide (TiO2 ) and zinc oxide (ZnO) nanoparticles (NPs) was investigated against E. coli, Salmonella enteritidis, Listeria monocytogenes, and Staphylococcus aureus pathogenic bacteria by determining sensitivity coefficient and kinetics of bacterial death.

Sorption kinetics of radium on hydroxyapatite and titanium dioxide nanomaterials were studied. The main aim of the current study was to determine the rate-controlling process and the corresponding kinetic model, due to the application of studied nanomaterials as α-emitters' carriers, and to assess the sorption properties of both materials from the radiopharmaceutical point of view by time ...

Influence of ionic strength, pH, and cation valence on aggregation kinetics of titanium dioxide nanoparticles. Rebecca A. French, Astrid R. Jacobson, Bojeong Kim, Sara L. Isley, Lee Penn, Philippe C. Baveye. Chemistry (Twin Cities) Research output: Contribution to journal › Article › peer-review. 602 Scopus citations.

[Composites of peptide nucleic acids with titanium dioxide nanoparticles. III. Kinetics of PNA dissociation from nanocomposites containing DNA/PNA duplexes] Bioorg Khim. May-Jun 2014;40(3):286-92. doi: 10.1134/s1068162014030030. [Article in Russian] Authors R N ...

A bifunctional magnetic Fe3O4@SiO2@TiO2 or MS-TiO2 antimicrobial nanocomposite was prepared based on simple sol-gel methods with common equipment and chemicals. Reaction pH was found to influence the TiO2 upload in the nanocomposite. The alkaline condition produced the greatest TiO2 upload, while the acidic condition the least. Annealing at 300 °C turned the as-synthesized amorphous …

Sorption kinetics of radium on hydroxyapatite and titanium dioxide nanomaterials were studied. The main aim of the current study was to determine the rate-controlling process and the corresponding kinetic model, due to the application of studied nanomaterials as α-emitters' carriers, and to assess the sorption properties of both materials from the radiopharmaceutical point of view by time ...

The kinetics of charge recombination were determined following low intensity optical excitation of RuII(2,2'-bipyridyl-4,4'dicarboxylate)2(NCS)2 sensitized nanocrystalline TiO2 films as a function of externally applied bias voltage V. These kinetics were found to be multiexponential. The median time (t50%) for charge recombination was found to depend strongly upon bias voltage, …