Pecharapa, Wisanu
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Preferred name
Pecharapa, Wisanu
Alternative Name
PECHARAPA, Wisanu
Pecharapa, W.
Main Affiliation
Email
wisanu.pe@kmitl.ac.th
221 results
Now showing 1 - 10 of 221
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Item type:Publication, Sol-gel combustion synthesis and characterizations of nanocrystalline Zinc, Nickel and Nickel-Zinc ferrites(2013-10-29) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, X-ray characterization, structural analysis, antibacterial activity, and self-cleaning property of Cu-doped TiO2-SiO2 nanocomposite prepared by sonochemical process(2024-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Spectroscopic investigation and local structure of Eu3+ ions in lead phosphate glasses for optical device applications(2024-04-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Microwave-assisted synthesis of ZnO/MWCNT hybrid nanocomposites and their alcohol-sensing properties(2014-01-01); Techitdheera, WichanZinc oxide and multi-walled carbon nanotube (ZnO/MWCNT) hybrid nanocomposites were synthesised by microwave-assisted method using the mixed solution of zinc acetate dehydrate (Zn(CH<inf>3</inf>COO)<inf>2</inf>·2H<inf>2</inf>O) and treated MWCNTs. The syntheses were carried out at various microwave irradiation powers. The characterisation of the as-synthesised nanocomposites was conducted by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD results revealed that the composites were composed of two phases of MWCNTs and hexagonal wurzite ZnO. The SEM results showed that the ZnO nanoparticles were well decorated on the surface of MWCNTs. The amount of ZnO nanoparticles and their size increased with increasing irradiation power. Thick-film sensors were fabricated onto interdigitated conducting electrodes using as-synthesised hybrid composites as sensing materials. The alcohol-sensing behaviour of the hybrid composite films was investigated. The results indicated that the irradiation power had significant influence on the sensing response of the sensors toward alcohol. The sensor fabricated from the composite synthesised at higher irradiation power exhibited an enhanced alcohol-sensing performance. © 2013 Taylor & Francis. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, ZnO nanostructures synthesized by one-step sol-gel process using different zinc precursors(2024-01-01); ; Zinc oxide (ZnO) nanopowders have been widely applied in electronics, optics and photocatalytic applications depending on their morphological structure. In the bottom-up process, it is conceived that the different zinc precursors may result in different formations of ZnO nanostructures with exceptional morphology. This work focuses on ZnO material synthesized via the facile sol-gel synthesis using different zinc slat precursors, including zinc acetate, zinc nitrate, zinc sulphate, and zinc chloride. All zinc salt precursors were incorporated with sodium hydroxide and hexamethylenetetramine (HMTA) under mild thermal energy with consistent conditions to investigate ZnO formation. The as-prepared samples appeared in white powders with different aggregation features. The crystalline phase, surface morphologies, and element mapping of all ZnO samples were analyzed using X-ray diffraction technique (XRD) and field emission scanning electron microscope (FE-SEM). The chemical bonding structure of ZnO powders was characterized by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The specific surface area per volume of ZnO nanopowders obtained by different zinc salt precursors was analyzed by Brunauer-Emmett-Teller (BET) method. All ZnO samples obtained from various zinc salt precursors exhibited a high crystallinity of the wurtzite structure without other impurities. The structural properties of ZnO nanopowders demonstrated different sizes and structures with distinguished formation and aggregation depending on the zinc precursor basic strength being used. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Growth of ZnO nano-rods and its photoconductive characteristics on the photo-catalytic properties(2019-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Investigation of structural properties of CuPc/TiO2 nanocomposites(2010-02-05); Structural properties of hybrid nanocomposites based on TiO<inf>2</inf> nanostructures and Copper phthalocyanine (CuPc) were investigated. The composites were prepared by mixing TiO<inf>2</inf> nanoparticle (TNP) and nanotube (TNT) with CuPc suspension. The precipitated composites were obtained by centrifuged and dried processes. Structural properties of the composites were evaluated by mean of Raman Spectroscopy and X-ray Absorption Fine Structure (XAFS). The results implied that CuPc has interatomic distance of C atoms in the second shell are decreased when CuPc is in the hybrid composites. © (2010) Trans Tech Publications. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of Pr3+-doped glasses for photonic applications: an overview and challenges in Judd–Ofelt analysis(2026-07-17) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Growth and characterization of Ni3FeN thin films by reactive gas timing RF magnetron sputtering(2010-05-05); Nukaew, JitiNi<inf>3</inf>FeN films were deposited on the glass substrate at room temperature by reactive gas timing rf magnetron sputtering, with two conditions: (1) a time period of Ar:N<inf>2</inf> gas (2) a flow rate of Ar:N<inf>2</inf> gas. Our results show that sputter rate increase with increasing of a time period and the rate of Ar:N<inf>2</inf> gas. The crystal structure of thin films was investigated by x-ray diffraction show fcc structure of Ni<inf>3</inf>FeN (200) plane. The lattice constants increase with increasing of the flow rate of the nitrogen gas but it decrease with increasing of a time period of Ar gas. The grain size of thin films were investigated by atomic force microscope show the size range between 20-120 nm. ©2010 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of nitrogen doping on optical and photocatalytic properties of TiO2 thin film prepared by spin coating process(2013-01-01);