K. Teanchai

Effects of Ni2+ Ions on Soda Lime Silicate Glasses

In this work, effects of Ni2+ ions on soda lime silicate glasses have been investigated. Glasses were prepared in formula (65-x)SiO2 : 25Na2O : 10CaO: xNiO (where x is 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10 mol%). The densities of glasses not depend on Ni2+ concentration. The refractive indices decreased with increasing of NiO concentration. The optical absorption spectra were measured by uv-visible spectrophotometer and show peaks correspond with Ni2+ in glass matrices. Both of octahedral transitions and tetrahedral transition from Ni2+ ion were found around 450 and 625 nm respectively. The color of glasses were also measured in CIE L* a* b* system.

Hydrothermal Growth of ZnO Nanorods along the Ultra-Thin ZnO Seed Layer Prepared by Magnetron Sputtering

ZnO nanorods were grown on magnetron sputtered ultra-thin ZnO seed layers through a hydrothermal method. Before ZnO nanorods growth, the ultra-thin ZnO seed layer has been annealed at temperatures ranging from 100 to 400°C in air. The influence of annealing treatment on the crystalline structure of the ultra-thin ZnO seed layers has been investigated by X-ray diffraction (XRD). The size and density of final prepared ZnO nanorods were investigated by field-emission scanning electron microscopy (FE-SEM). It was found that the length and the aspect ratio of the ZnOnanorods can be readily tuned by control of the ZnO ultra-thin seeds layer which results from the annealing treatment process.

Influence of NiO on Physical and Optical Properties of Zinc Bismuth Borate Glasses

The objectives of this work are to prepare and to study some properties of zinc bismuth borate glasses containing NiO in chemical formula 10ZnO : 30Bi2O3 : (60-x)B2O3 : xNiO, with x is the concentration of NiO, ranges from 0.00 to 0.05 mol%. The results found that the density of glasses increase with increasing of NiO concentration, whereas the molar volumes decrease. Absorption spectra were performed using UV-VIS-NIR spectrophotometer in the region of ultraviolet to near infrared, the absorption peak was not found. Moreover, the color in CIE L*a*b* of all glass samples were also investigated.

Investigation some Properties of Bismuth Borate Glasses Containing Al2O3

The glass samples in bismuth borate glass matrix containing Al2O3, with the composition of xAl2O3 : 30Bi2O3 : (70-x)B2O3 where x are Al2O3 concentration varying from 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 mol%, have been prepared. The obtained glasses were investigated some physical and optical properties. The results showed that the densities increased with increasing of Al2O3 concentration, whereas the molar volumes decreased. For the absorption spectra, no peak in the UV to NIR regions has been observed. Moreover the energy band gap and the refractive index for all samples have been calculated.

Effect of Annealing Temperature on Electrochromic Properties of Tantalum Oxide Thin Films Deposited by DC Reactive Magnetron

The effect of annealing temperature on the electrochromic properties of the tantalum oxide (TaO) thin films deposited on silicon wafer (100) and indium tin oxide (ITO) substrates by dc reactive magnetron sputtering was investigated. The films were annealed at 300, 400 and 500 °C in vacuum for 2 hour. The crystalline structure, morphology, optical properties and electrochromic properties of as-deposited and annealed film were deduced by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), spectroscopic ellipsometry and ultraviolet–visible (UV–vis) spectrophotometery, respectively. The reflective index of TaO thin films increased with increasing annealing temperature. The result indicated that the annealed TaO thin film showed better performance than the as-deposited film.

Characterization the Raw Material of Filler in Cellulose Film

The aim of this study is preliminary survey the natural material and investigates physicochemical properties of cellulose and chicken eggshell. The chickeneggshell as natural material which used as film filler in the cellulose/CaCO3 biocomposite. The potential and the possibilities of chicken eggshell to use as filler were studied with three conventional analysis techniques, X-ray Diffraction (XRD), Energy Dispersive X-ray Fluorescence (EDXRF) and Fourier transform infrared (FT-IR) spectroscopy. It was found that the structural of chicken eggshell have calcites phase and the structural of cellulose have amorphous crystalline phase while the chemical composition of both material were investigated by EDXRF which show the organic compound as major element in cellulose but in chicken eggshell the major element is organic compound and calcium (Ca) element. The deeply investigate molecular composition by FT-IR which show the characteristic feature have been studied.

Influence of Rapid Thermal Annealing on Structural, Optical and Electrical Properties of ITO Thin Films

Indium doped tin oxide (ITO) thin films were deposited on silicon wafer (100) and glass slide by ion assisted electron beam evaporation deposition. After deposition, the ITO thin films were annealed in vacuum (100-300°C) and their structural, optical and electrical properties were systematically investigated. X-ray diffraction,atomic force microscopy, ultraviolet–visible (UV–vis) spectrophotometer and hall-effect measurement were employed to obtain information on the crystallization, transmission and resistivity the films.It was found that the rapid thermal annealing can improve the resistivity of ITO thin films which specializes for the transparent conductive layers.

Effect of CoO Addition on the Optical and Physical Properties of Silicoborate Glasses

In this work, effects of CoO on silicoborate glasses have been investigated. Glasses were prepared in formula (53-x)B2O3:11SiO2:32SrO:1Bi2O3:1TiO2: xCoO (where x is 0.00, 0.01, 0.02, 0.03, 0.04 and 0.05 mol%). The results show that, the density and refractive index were increased with increasing of CoO concentration. The optical absorption spectra were measured by UV-Visible Spectrophotometer and show peaks correspond with Co2+ in glass matrices at a wavelength of around 511 584 and 649 nm for all glass samples.

Biosorption of Zn(II) from Aqueous Solution by Amusium pleuronectes Shell

In this study, the experimental investigation and assessment the absorption capacity for Zn ion with Amusium Pleuronectes shell. The investigations were carried out by batch method and variables of the batch experiment include solution pH, Contact time, were determind. The mechanism of bisorption is chemisorption or/and physical adsorption was confirmed by X-ray Diffraction (XRD) and Energy Dispersive X-ray Fluorescence (EDXRF). The results showed that the Amusium Pleuronectes shell has a high level of absorption capacity for Zn (II) ions. Another that result of mechanism of biosorption suggests and confirm with the result of XRD and EDXRF.

Study of the Sorption of Cu(II) from Aqueous Solution Using Amusium pleuronectes Shell

In the present study batch biosorption studies were carried out for the adsorption of Cu (II) from aqueous solution with Amusium Pleuronectes shell. Variables of the batch experiments include initial concentration of Cu (II), solution pH, contact time, were investigated. The experimental results explored that the maximum pH for efficient sorption of Cu (II) was 9. The optimum conditions of sorption were found to be contact time of 200 min, initial Cu concentration 250 mg/L. Another that, the X-Ray Driffraction (XRD) was used to confirmed the binding site between the bio sorbent and the Cu (II) ions. From XRD pattern the result suggests that the mechanism of bio sorption is rather chemisorption than physical adsorption.