Wen-Churng Lin

Kun Shan University, 臺南市, Taiwan, Taiwan

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Publications (4)7.66 Total impact

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    Wen-Churng Lin, Yo-Jane Lin
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    ABSTRACT: Vanadium(IV)-doped titanium dioxide (TiO(2)) photocatalyst powders were prepared by the sol-gel method and characterized by Brunauer-Emmett-Teller-specific surface area, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. V-doping in the TiO(2) increases the crystal grain size, which decreases the specific surface areas of powders. This V-doping changes the band gap of TiO(2), leading to extend the absorption to visible light regions (400-800 nm). Photocatalytic degradation of methylene blue (MB) in water was investigated as a function of the vanadium content in TiO(2) and was found to follow pseudo first-order rate kinetics. Appropriate content of V-doping is an effective means to improve the photocatalytic activity of TiO(2) for MB degradation under visible light irradiation.
    Environmental Engineering Science 06/2012; 29(6):447-452. · 0.93 Impact Factor
  • Wen-Churng Lin, Wein-Duo Yang, Sen-Yuan Jheng
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    ABSTRACT: The degradation of the dyes methylene blue (MB), methyl orange (MO), and indigo (Ind) in water was carried out via a photocatalytic reaction. The porous nanocrystalline TiO2 photocatalysts used in the photocatalytic degradation were prepared using polyethylene glycol (PEG) as a structure-directing agent in the sol–gel system. The Taguchi experimental design method (L9(34)) was applied to determine the preparation conditions of the sol–gel process. The TiO2 photocatalyst powders obtained at the optimal preparation conditions through analysis of variance (ANOVA) could degrade methylene blue, methyl orange, and indigo in water by 57.06–84.14%, 35.15–50.09%, and 69.09–99.09%, respectively, after 10h of UV irradiation. TiO2 thin-film photocatalyst was also prepared at the optimal preparation conditions; it exhibited good performance for the photodegradation of methylene blue, methyl orange, and indigo solution under UV light irradiation.
    Journal of the Taiwan Institute of Chemical Engineers 03/2012; · 2.64 Impact Factor
  • Wen-Churng Lin
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    ABSTRACT: Equilibrium tie-line data have been determined at 323.15 K, 348.15 K, and 373.15 K for the liquid–liquid equilibria (LLE) of the ternary systems undecane + 1,4-diethylbenzene + tetrahydrothiophene 1,1-dioxide and tridecane + 1,4-diethylbenzene + tetrahydrothiophene 1,1-dioxide. The relative mutual solubility of 1,4-diethylbenzene is higher in undecane + tetrahydrothiophene 1,1-dioxide than in tridecane + tetrahydrothiophene 1,1-dioxide mixture. The tie-line data were correlated with the universal quasichemical (UNIQUAC) and nonrandom two-liquid (NRTL) models. The calculated values based on the UNIQUAC model were found to be better than those based on the NRTL model; the average root-mean-square deviation between the phase composition obtained from the experiment and that from the calculation was 0.3788 for UNIQUAC compared to 0.4459 for NRTL. The values of selectivity and distribution coefficients were derived from the equilibrium data.
    Journal of Chemical & Engineering Data 07/2011; 56(12):4486–4490. · 2.05 Impact Factor
  • Wen-Churng Lin
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    ABSTRACT: Equilibrium tie line data have been determined at (323.15, 348.15, and 373.15) K for the ternary liquid–liquid equilibria (LLE) of three alkane + sec-butylbenzene + sulfolane systems, where the alkanes studied are decane, dodecane, and tetradecane. The relative mutual solubility of sec-butylbenzene is higher in decane + sulfolane than in dodecane + sulfolane or tetradecane + sulfolane mixtures. The tie line data were correlated with the UNIQUAC and NRTL models. The calculated values based on the UNIQUAC model were found to be better than those based on the NRTL model; the average root-mean-square deviation between the phase composition obtained from experiment and that from calculation was 0.00385 for UNIQUAC compared to 0.00566 for NRTL. The values of selectivity and distribution coefficients were derived from the equilibrium data.
    Journal of Chemical & Engineering Data 06/2011; 56(7):3122–3127. · 2.05 Impact Factor