Seeharaj, Panpailin
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Preferred name
Seeharaj, Panpailin
Alternative Name
Seeharaj, P.
Main Affiliation
Email
panpailin.se@kmitl.ac.th
18 results
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Item type:Publication, Platelet Ceria Catalysts from Solution Combustion and Effect of Iron Doping for Synthesis of Dimethyl Carbonate from CO2(2025-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Ba0·5Sr0·5(Co0·8Fe0.2)1-xTaxO3-δ perovskite anode in solid oxide electrolysis cell for hydrogen production from high-temperature steam electrolysis(2021-02-08); Kim-Lohsoontorn, P.Among perovskite anodes in solid oxide electrolysis cell (SOEC), Ba<inf>0·5</inf>Sr<inf>0·5</inf>Co<inf>0·8</inf>Fe<inf>0·2</inf>O<inf>3-δ</inf> (BSCF) has gained much attention due to its dominantly high performance. However, the BSCF still suffers from chemical instability. In this study, the B-site of BSCF is partially substituted by a higher valence Ta<sup>5+</sup> (5, 10, 15 and 20 mol%) to improve its structural stability - Ba<inf>0·5</inf>Sr<inf>0·5</inf>(Co<inf>0·8</inf>Fe<inf>0.2</inf>)<inf>1-x</inf>Ta<inf>x</inf>O<inf>3-δ</inf> (BSCFTax, 0 ≤ x ≤ 0.20). It is found that doping with higher valence Ta<sup>5+</sup> increases both chemical stability and electrochemical performance of BSCF. Although the BSCFTa0.10 shows the lowest oxygen vacancies indicating by the ratio of adsorbed oxygen vacancies (O<inf>adsorbed</inf>) to lattice oxygen (O<inf>lattice</inf>), the electrochemical performance increases. The decrease in Co<sup>3+</sup>/Co<sup>4+</sup> ratio results in increasing electronic conductivity in the anode. It is likely that proper amount of Ta<sup>5+</sup> doping provide a balance between ionic and electronic conductivity in the anode and improved electrochemical performance. The symmetrical half-cells with electrolyte support (BSCFTa/YSZ/BSCFTa) are fabricated to determine the area specific resistance (ASR) and activation energy of conduction - BSCFTa0.10 shows the best performance. Cathode-supported Ni-YSZ/YSZ/BSCFTa0.10 also shows higher durability than Ni-YSZ/YSZ/BSCF (operating at current density −0.45 A cm<sup>−2</sup> in electrolysis mode, 80 h, 800 °C and H<inf>2</inf>O to H<inf>2</inf> ratio of 70:30). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Ultrasonically assisted surface modified CeO2 nanospindle catalysts for conversion of CO2 and methanol to DMC(2022-11-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Asymmetric dot-patterned wettable and antibacterial wound dressings from bacterial cellulose–alginate composites coated with stearic acid-modified ZnO/chitosan/AgNPs(2025-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The role of γ-C2H5NO2 as a new transient liquid phase in cold sintering process of BaTiO3 composites(2024-07-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Property improvement of biodegradable citric acid-crosslinked rice starch films by calcium oxide(2021-12-15); Due to several important limitations for packaging applications of starch film such as strength and hydrophilicity, rice starch (Oryza sativa) film was crosslinked with citric acid and modified by different contents of calcium oxide. FTIR spectra showed the evidence of crosslinking by citric acid and the presence of calcium oxide in the modified rice starch films. After the crosslinking, the decrease of degree of crystallinity and swelling including the increase of film smoothness and strain at maximum load were observed. The application of both citric acid and calcium oxide caused greater decrease of swelling, moisture uptake as well as higher stiffness and antibacterial activity than those of the use of only the citric acid. The highest stiffness and antibacterial activity were found for the crosslinked film added by 5 wt% calcium oxide. Moreover, the effect of calcium oxide contents on morphological, thermal and biodegradable properties of the crosslinked films was also investigated. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Superhydrophobic eggshell for fabrication of hydrophobic barrier of paper-based analytical device for colorimetric determination of ammonium ion in water(2024-05-01); This work demonstrates the first application of the superhydrophobic eggshell as an environmental-friendly material for fabricating the hydrophobic barrier of a paper-based analytical device (PAD). The eggshell surface was modified by mixing the pulverized chicken eggshell biowaste with stearic acid and a polystyrene binder to accomplish superhydrophobicity. The PAD (10 × 10 mm<sup>2</sup>) is comprised of the circular-shaped hydrophilic reservoir (Ø 5 mm). The liquid barrier was fabricated by painting both the topside and the underside of the filter paper with the dispersed superhydrophobic eggshell solution. The SEM images revealed that the microsized superhydrophobic eggshell particles absorbed onto the porous surface of the cellulose fibril. A coated surface with a water contact angle of 155.39° ± 1.02° (n = 10) on the paper substrate was achieved, and this indicated superhydrophobicity. The eggshell barrier enabled excellent water and chemical resistance. The fabricated PAD was applied for the colorimetric determination of ammonium cations (NH<inf>4</inf><sup>+</sup>), based on the modified Berthelot reaction. Samples and chromogenic solutions were aliquoted onto the hydrophilic reservoir, with subsequent capture of the optical image of the stable, green-colored product by a smart phone under a light-controlled studio. The green color intensities were evaluated by ImageJ™ and plotted against the standard NH<inf>4</inf><sup>+</sup> concentrations. A wide linear calibration range 5.0 to 100 mg N/L was achieved with good linearity (r<sup>2</sup> > 0.99). The PAD confirmed satisfied analytical recovery (Mean ± SD: 100.6 % ± 0.97, n = 11 samples) and high precision (RSD = 0.85 %: 10-PAD replicate measurements of 1.0 mg N/L). The limit of detection (3 SD of blank/slope) of 1.05 mg N/L was found sensitive enough to monitor the NH<inf>4</inf><sup>+</sup> contents in freshwater. The results, determined by the developed PAD and ion chromatography, showed no significant difference under the statistical paired t-test at 95 % confidence (t<inf>stat</inf> = -1.80, t<inf>cri</inf> = 2.57, n = 6 samples). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Alkanolamine-Grafted and Copper-Doped Titanium Dioxide Nanosheets-Graphene Composite Heterostructure for CO2 Photoreduction(2023-11-13) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of surfactant concentration on the formation of Fe2O3@SiO2 NIR-reflective red pigments(2021-05-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Magnetically separable CeO2/CoFe2O4 heterojunction photocatalysts for dye degradation: characterization and mechanism(2024-01-01);