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ผลงานตีพิมพ์ในวารสารวิชาการDensity functional theory study of adsorption geometries and electronic structures of azo-dye-based molecules on anatase TiO2 surface for dye-sensitized solar cell applicationsผู้แต่ง: Dr.Pongthep Prajongtat, Associate Professor , Dr.Songwut Suramitr, Associate Professor , Dr.Somkiat Nokbin, Lecturer ,  Porf. Koichi Nakajima, Prof.Koichiro Mitsuke, Dr.Supa Hannongbua, Professor , วารสาร:   
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ผลงานตีพิมพ์ในวารสารวิชาการDetermination of phase ratio in polymorphic materials by x-ray absorption spectroscopy: The case of anatase and rutile phase mixture in TiO2ผู้แต่ง:Smith, M.F, Klysubun, W, Kityakarn, S, Dr.Attera Worayingyong, Associate Professor , Zhang, S.B, Wei, S.-H, Onkaw, D, Songsiriritthigul, P, Rujirawat, S, Limpijumnong, S, วารสาร: |
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 การประชุมวิชาการGrowth of anatase TiO2 thin film for photokilling of bacteria by DC reactive magnetron sputtering techniqueผู้แต่ง:Tongwanichniyom, S., Dr.Wichian Siriprom, Lecturer, Manop, D., Buranawong, A., Kaewkhao, J., Witit-Anun, N., การประชุมวิชาการ: |
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ผลงานตีพิมพ์ในวารสารวิชาการAnatase TiO2 single crystals exposed with high-reactive {111} facets toward efficient H2 evolutionผู้แต่ง:Xu, H., Dr.Pakpoom Reunchan, Associate Professor , Ouyang, S., Tong, H., Umezawa, N., Kako, T., Ye, J., วารสาร: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Phase Characterization of TiO2 Powder by XRD and TEM) ผู้เขียน:เขมฤทัย ถามะพัฒน์ สื่อสิ่งพิมพ์:pdf AbstractIn this study, the commercial TiO2 nanopowder and micropowder of anatase phase and rutile phase have been characterized by x-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD patterns of nano-TiO2 in rutile and anatase phases exhibit broad peaks whereas both phases of micro-TiO2 demonstrate very sharp peaks. TEM images show that the grain size of TiO2 micropowders and TiO2 nanopowders are 0.3-0.7 ?m and 10 nm, respectively. The selected-area electron diffraction patterns of TiO2 nanopowders in rutile and anatase phases are consistent with XRD results. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Structures and Optical Properties of TiO2 Thin Films Deposited on Unheated Substrate by DC Reactive Magnetron Sputtering) ผู้เขียน:Nirun Witit-anun, Prasertsak Kasemanankul, Surasing Chaiyakun, พิเชษฐ ลิ้มสุวรรณ สื่อสิ่งพิมพ์:pdf AbstractTitanium dioxide thin films (TiO2) were deposited on unheated substrate on a glass slide and Si-wafer by the DC reactive magnetron sputtering method at different total pressures. The crystal structure, surface morphology and optical transmittance were characterized by X-ray diffractometer, atomic force microscopy and UV-VIS-NIR spectrophotometer, respectively. The deposited films were transparent and the thickness was about 133-168 nm. XRD results showed that all samples possessed a polycrystalline structure and changed from the mixed phase of anatase and rutile, to rutile phases, as the total pressure decreased. An increase in the film’s roughness was observed with increasing sputtering pressure. The optical transmission measurements revealed that the mixed phases of anatase and rutile had higher transmittance than the pure rutile phase. The refractive index, in the visible spectrum was relatively high, while the energy band gap was found to be 3.25 eV. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Structures and Optical Properties of TiO2 Thin Films Deposited on Unheated Substrate by DC Reactive Magnetron Sputtering) ผู้เขียน:Nirun Witit-anun, Prasertsak Kasemanankul, Surasing Chaiyakun, พิเชษฐ ลิ้มสุวรรณ สื่อสิ่งพิมพ์:pdf AbstractTitanium dioxide thin films (TiO2) were deposited on unheated substrate on a glass slide and Si-wafer by the DC reactive magnetron sputtering method at different total pressures. The crystal structure, surface morphology and optical transmittance were characterized by X-ray diffractometer, atomic force microscopy and UV-VIS-NIR spectrophotometer, respectively. The deposited films were transparent and the thickness was about 133-168 nm. XRD results showed that all samples possessed a polycrystalline structure and changed from the mixed phase of anatase and rutile, to rutile phases, as the total pressure decreased. An increase in the film’s roughness was observed with increasing sputtering pressure. The optical transmission measurements revealed that the mixed phases of anatase and rutile had higher transmittance than the pure rutile phase. The refractive index, in the visible spectrum was relatively high, while the energy band gap was found to be 3.25 eV. |
 ที่มา:Materials Chemistry and Physicsหัวเรื่อง:Preparation and photocatalytic study of fibrous K0.3Ti4O7.3(OH)1.7-anatase TiO2 nanocomposite photocatalyst |
ที่มา:The 3rd International Symposium on Engineering, Energy and Environmentsหัวเรื่อง:- |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : An Alkoxide Free Sol-Gel Synthesis of Nanosized TiO2) ผู้เขียน:Kornvalai Panpae, Suppalak Angkaew, Chiravadee Sritara, Chinda Ngernsuttichaiporn สื่อสิ่งพิมพ์:pdf AbstractNanosized TiO2 with anatase structure has been prepared by a non-alkoxide sol-gel route from an aqueous solution of titanyl sulfate. This paper investigated the influence of stirrer speed on anatase precipitation carried out in batch mode. Stirrer speed was varied between 400 and 1000 rpm. The intensity of stirring determined the final particle size of anatase aggregates in suspension. Changes to primary agglomerate and crystal population due to varying stirrer speed were reported. In our study, the smallest aggregates (mean size of 6-8 nm) were obtained at a stirrer speed of 1000 rpm. It was also found that the anatase to rutile phase transformation began at 800?C of calcination. A calcination treatment, from 400 to 1000?C, was applied. The degree of crystallinity and purity of the synthesized materials were reported. The crystalline anatase particles had an average particle size of 10-20 nm between the calcination temperature 400-600?C. The powders were characterized by powder X-ray diffraction (XRD), the morphology and grain size of the titania particles were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD patterns indicated that the samples were crystalline titania which had very broad and small peaks of anatase phase. The TEM observations showed the vast majority of particles were quasispherical; the average size distribution of particle was about 20 nm. The TEM results supported the conclusions derived from the XRD data. Finally, the amorphous hydrous and crystalline titania particles were characterized by thermogravimetric (TGA) and differential thermal analysis (DTA). |