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 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).

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.

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.

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.

Plasma Induced Grafting of PMMA onto Titanium Dioxide Powder

2005 ◽  
Vol 7 (4) ◽  
pp. 2955-2958 ◽  
Author(s):  
Zhong Shaofeng ◽  
Meng Yuedong ◽  
Ou Qiongrong ◽  
Xu Xu
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder

Synthesis and Characterization of Nanopraticle Hematite (α-Fe2O3) Minerals from Natural Iron Sand Using Co-Precipitation Method and its Potential Applications as Extrinsic Semiconductor Materials Type-N

2019 ◽  
Vol 967 ◽  
pp. 259-266 ◽  
Author(s):  
Muhammad Rizal Fahlepy ◽  
Yuyu Wahyuni ◽  
Muhamma Andhika ◽  
Arini Tiwow Vistarani ◽  
Subaer
Keyword(s):  
Ammonium Hydroxide ◽  
Raw Material ◽  
Semiconductor Materials ◽  
Precipitation Method ◽  
Precipitation Process ◽  
Sem Image ◽  
Natural Iron ◽  
Before And After ◽  
Potential Applications ◽  
Co Precipitation

This research is about nanoparticles hematite (NPH) synthesized and characterized from natural iron sands using co-precipitation method and its potential applications as extrinsic semiconductor materials type-N. The aims of this study is to determine the process parameters to obtain hematite of high purity degree and to observe its physical characteristics as an extrinsic semiconductor materials type-N. The iron sand was first separated by magnetic technique and then dissolved into HCl solution before conducting the precipitation process. Precipitation was done by dripping ammonium hydroxide (NH4OH). Precipitated powder was dried at 80°C for 2 hours, and then calcined at 500°C, 600°C 700°C for 2 hours respectively. The composition of iron sands, purity degree, hematite mineral grain size, and space group were analyzed by XRF, XRD, FTIR and SEM. The XRF analysis result of raw material, showed that dominant element and composition in the sample is Fe with purity degree is 90.51%. The XRD result before and after precipitation showed Fe3O4 and α-Fe2O3. Fe3O4 purity degree was obtained 85%, and α-Fe2O3 in NPH500, NPH600, NPH700 were 63%, 83%, and 76%, respectively. FTIR spectral showed crystalline hematite characteristics stong band of 472.07 to 559.62 cm-1. SEM image showed the morphology of agglomeration particulates, when the calcinaton temperature increases, the agglomeration will be seperated due to thermal energy. Based on the charaterization results it was found that the natural iron sand synthesized has the potential to be applied as an N-type extrinsic semiconductor material.

scholarly journals Lead ions sorption using magnetically modified sorbent based on titanium dioxide powder

2018 ◽  
Vol 5 ◽  
pp. S61-S70
Author(s):  
Jana Seidlerová ◽  
Oldřich Motyka ◽  
Klára Drobíková ◽  
Ivo Šafařík
Keyword(s):  
Titanium Dioxide ◽  
Lead Ions ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder
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