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

2010 ◽  
Vol 93-94 ◽  
pp. 161-164 ◽  
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).

Photocatalytic Degradation of 2-chlorophenol over TiO2 Powder

2014 ◽  
Vol 931-932 ◽  
pp. 291-295
Author(s):  
Pusit Pookmanee ◽  
Songpon Ngamta ◽  
Wiyong Kangwansupamonkon ◽  
Ratchadaporn Puntharod ◽  
Supaporn Sangsrichan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Chemical Compositions ◽  
Mixed Solution ◽  
Hydrothermal Route ◽  
Scanning Electron

Titanium dioxide (TiO2) powder was prepared by hydrothermal route. Titanium isopropoxide, ammonium hydroxide and nitric acid were used as the starting materials. The final pH value of mixed solution was 1 and treated at 80 and 100 °C for 26h. The phase transition of TiO2powder was studied by Xray diffraction (XRD). Multiphase of anatase and rutile of TiO2powder were obtained at 80 and 100 °C for 26h without calcination steps. The morphology of TiO2powder was investigated by scanning electron microscopy (SEM). The particle was highly agglomerated and irregular in shape with the range of particle size of 0.10.3 μm. The chemical composition of TiO2powder was examined by energy dispersive spectroscopy (EDS). The element chemical compositions show the characteristic Xray energy level as follows: titanium Kα= 4.51 keV and Kβ= 4.93 keV and oxygen Kα= 0.52 keV, respectively. The photocatalytic degradation efficiency of 2chlorophenol (2CP) over TiO2powder was determined by gas chromatography (GC). It was found that TiO2powder prepared by hydrothermal route at 80 °C for 2h was the best efficiency for photocatalytic degradation of 2CP.

Photocatalytic Destruction of Methyl Orange by Titanium Dioxide Powder Synthesized by an Oxalate Co-Precipitation Method

2010 ◽  
Vol 93-94 ◽  
pp. 320-323
Author(s):  
Pusit Pookmanee ◽  
Sirion Angkana ◽  
Sukon Phanichphant
Keyword(s):  
Titanium Dioxide ◽  
Methyl Orange ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Precipitation Method ◽  
Rutile Structure ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Photocatalytic Destruction ◽  
Co Precipitation

Titanium dioxide powder was synthesized by an oxalate co-precipitation method with titanium isopropoxide and oxalic acid as the starting precursors. White precipitate was obtained after adding ammonium hydroxide until the final pH of solution was 8 and then calcined at 400-800 °C for 2h. The phase was characterized by X-ray diffraction. Single phase anatase structure was obtained after calcination at 400 °C. Multi-phase of anatase and rutile structure was obtained after calcined at 600 and 800 °C. The morphology was investigated by scanning electron microscopy. The particle was irregular in shape and highly agglomerate with a range of particle size from 0.1-0.3 µm. The photocatalytic destruction of methyl orange by titanium dioxide was determined by Ultraviolet spectrophotometry. Titanium dioxide powder synthesized by an oxalate co-precipitation method after calcination at 800 °C showed the highest photocatalytic activity.

Photocatalytic Degradation of Methylene Blue and Methyl Orange over TiO2 Powder Synthesized via the Solvothermal Method

2015 ◽  
Vol 749 ◽  
pp. 51-55
Author(s):  
Pongthep Jansanthea ◽  
Natkritta Boonprakob ◽  
Jaruwan Treenattip ◽  
Pusit Pookmanee ◽  
Sukon Phanichphant
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Solvothermal Method ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray

Titanium dioxide (TiO2) powder was synthesized via the solvothermal method. Titanium isopropoxide (C12H28O4Ti), ammonium hydroxide (NH4OH) and nitric acid (HNO3) were used as the starting materials. The mixed solution was diluted with ethanol (C2H5OH) and heated at 100°C for 5h in a Teflon–lined stainless steel autoclave vessel. The phase transition of TiO2 powder was studied by X–ray diffraction (XRD). The morphology and chemical composition of TiO2 powder were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The photocatalytic degradation of methylene blue and methyl orange over TiO2 powder were determined using Ultraviolet–visible spectroscopy (UV–Vis).

Titanium Dioxide Powder Prepared by a Low Temperature Hydrothermal Method

2010 ◽  
Vol 93-94 ◽  
pp. 627-630 ◽  
Author(s):  
Pusit Pookmanee ◽  
Tarika Kuntatun ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant
Keyword(s):  
Titanium Dioxide ◽  
Low Temperature ◽  
Hydrothermal Method ◽  
Chemical Compositions ◽  
Mixed Solution ◽  
Rutile Structure ◽  
X Ray ◽  
Titanium Dioxide Powder ◽  
Calcination Step ◽  
Dioxide Powder

Titanium dioxide powder was prepared by a low temperature hydrothermal method. Titanium isopropoxide, ammonium hydroxide and nitric acid were used as the starting precursors. The mixed solution with final pH of 1 was treated in the autoclave hydrothermal at 80-100 °C for 2-4h. The phase of titanium dioxide powder was studied by X-ray diffraction (XRD). Anatase and rutile structure were obtained at 80 °C for 2-4h without calcination step. Anatase structure was obtained at 100 °C for 2-4h without calcination step. The morphology of titanium dioxide powder was investigated by scanning electron microscopy (SEM). The particle was irregular in shape and agglomerated with the range particle size of 0.5-0.8 µm. The chemical composition of titanium dioxide powder was examined by energy dispersive spectroscopy (EDS).The element chemical compositions show the characteristic X-ray energy level as follows: titanium Kα = 4.51 keV and Kβ = 4.93 keV and oxygen Kα = 0.52 keV, respectively.

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

2013 ◽  
Vol 788 ◽  
pp. 246-249 ◽  
Author(s):  
Zhi Wang ◽  
Zhi Qiang Yang
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Ph Value ◽  
Mass Ratio ◽  
Carbon Doped ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Ultrasonic Time ◽  
Dispersant Additive ◽  
Doped Titanium Dioxide

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.

Experimental Investigation on Viscosity of Nanofluids

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.

Photocatalytic degradation of cetylpyridinium chloride over titanium dioxide powder

1997 ◽  
Vol 108 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Bhawana Singhal ◽  
Anugya Porwal ◽  
Ajay Sharma ◽  
Rameshwar Ameta ◽  
Suresh C. Ameta
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Cetylpyridinium Chloride ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder

scholarly journals Population Balance Application in TiO2 Particle Deagglomeration Process Modeling

Energies ◽  
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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