Study on the Dispersion of Carbon Doped Titanium Dioxide Powder in Aqueous Solution

The dispersion of carbon doped titanium dioxide (TiO2) powder in aqueous solution was studied. The spectrophotometer method was used to determine the effects of dispersant additive ratio, ultrasonic time and pH value on the dispersion of TiO2. The results show that the carbon doped titanium dioxide aqueous solution was found to have the optimum dispersion performance when the mass ratio of sodium hexametaphosphate (SHMP)/TiO2/water is 1:50:100, the ultrasonic time is 15min and the pH value of the solution is 10.

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Experimental Investigation on Viscosity of Nanofluids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.650.134 ◽

2013 ◽

Vol 650 ◽

pp. 134-138

Author(s):

Xian Ju Wang ◽

Zhou Fei Wang ◽

Zheng Zhang Li

Keyword(s):

Experimental Investigation ◽

Titanium Dioxide ◽

Mass Fraction ◽

Ph Value ◽

Experimental Results ◽

Alumina Powder ◽

Water Suspension ◽

Titanium Dioxide Powder ◽

Dioxide Powder ◽

Capillary Viscometers

The effects due to fluid pH and dispersant concentration on the dynamic viscosity for the Al2O3–water and TiO2–water nanofluids had been experimentally investigated. The viscosity of the two kinds of nanofluids was measured using capillary viscometers. The experimental results showed that there exists an optimized value of pH (pH≈8.0) at which the viscosities of the two nanofluids take their minima values. The experimental results also showed that the influence of dispersant concentration on the viscosity of Al2O3–water suspension was relatively large comparing with that of the TiO2–water nanofluid, and the dispersion of alumina powder is poorer than that of titanium dioxide powder at the same pH value and same mass fraction.

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Photocatalytic oxidation of water by visible light using ruthenium-doped titanium dioxide powder

Journal of Photochemistry and Photobiology A Chemistry ◽

10.1016/s1010-6030(99)00128-8 ◽

1999 ◽

Vol 127 (1-3) ◽

pp. 107-110 ◽

Cited By ~ 128

Author(s):

Teruhisa Ohno ◽

Fumihiro Tanigawa ◽

Kan Fujihara ◽

Shinobu Izumi ◽

Michio Matsumura

Keyword(s):

Titanium Dioxide ◽

Visible Light ◽

Photocatalytic Oxidation ◽

Titanium Dioxide Powder ◽

Dioxide Powder ◽

Doped Titanium Dioxide

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Photocatalytic Degradation of Geosmin by Titanium Dioxide Powder Synthesized by the Hydrothermal Route

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.93-94.161 ◽

2010 ◽

Vol 93-94 ◽

pp. 161-164 ◽

Cited By ~ 5

Author(s):

Pusit Pookmanee ◽

Hathaithip Ninsonti ◽

Supaporn Sangsrichan ◽

Wiyong Kangwansupamonkon ◽

Sukon Phanichphant

Keyword(s):

Titanium Dioxide ◽

Photocatalytic Degradation ◽

Ph Value ◽

Ammonium Hydroxide ◽

Titanium Isopropoxide ◽

Mixed Solution ◽

Hydrothermal Route ◽

X Ray ◽

Titanium Dioxide Powder ◽

Dioxide Powder

Titanium dioxide powder was synthesized by the hydrothermal route with the starting precursors as titanium isopropoxide, ammonium hydroxide and nitric acid. The final of pH value of mixed solution was 1 and treated in the hydrothermal PTFE vessel at 80-100 °C for 3h. The phase of titanium dioxide was characterized by X-ray diffractometer (XRD). The morphology of titanium dioxide was investigated by scanning electron microscope (SEM). The chemical composition of titanium dioxide was examined by energy dispersive X-ray spectrophotometer (EDXS). The photocatalytic degradation of geosmin by titanium dioxide was determined by gas chromatograph coupled with flame ionization detector (GC-FID).

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Comment on “Mechanisms for Photooxidation Reactions of Water and Organic Compounds on Carbon-Doped Titanium Dioxide, as Studied by Photocurrent Measurements”

The Journal of Physical Chemistry C ◽

10.1021/jp7116104 ◽

2008 ◽

Vol 112 (15) ◽

pp. 6209-6210 ◽

Cited By ~ 1

Author(s):

L. H. Zhu

Keyword(s):

Titanium Dioxide ◽

Organic Compounds ◽

Carbon Doped ◽

Doped Titanium Dioxide

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Population Balance Application in TiO2 Particle Deagglomeration Process Modeling

Energies ◽

10.3390/en14123523 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3523

Author(s):

Radosław Krzosa ◽

Łukasz Makowski ◽

Wojciech Orciuch ◽

Radosław Adamek

Keyword(s):

Particle Size ◽

Titanium Dioxide ◽

Mechanistic Model ◽

Population Balance ◽

Tio2 Particle ◽

Application Process ◽

Titanium Dioxide Powder ◽

Dioxide Powder ◽

Computational Fluid Dynamics Cfd ◽

Hydrodynamic Stresses

The deagglomeration of titanium-dioxide powder in water suspension performed in a stirring tank was investigated. Owing to the widespread applications of the deagglomeration process and titanium dioxide powder, new, more efficient devices and methods of predicting the process result are highly needed. A brief literature review of the application process, the device used, and process mechanism is presented herein. In the experiments, deagglomeration of the titanium dioxide suspension was performed. The change in particle size distribution in time was investigated for different impeller geometries and rotational speeds. The modification of impeller geometry allowed the improvement of the process of solid particle breakage. In the modelling part, numerical simulations of the chosen impeller geometries were performed using computational-fluid-dynamics (CFD) methods whereby the flow field, hydrodynamic stresses, and other useful parameters were calculated. Finally, based on the simulation results, the population-balance with a mechanistic model of suspension flow was developed. Model predictions of the change in particle size showed good agreement with the experimental data. Using the presented method in the process design allowed the prediction of the product size and the comparison of the efficiency of different impeller geometries.

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