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Niu P.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong
Asian Journal of Chemistry | Year: 2013

The degradation of methyl orange was studied using advanced oxidation process by exposed to UV irradiation in the presence of TiO2. TiO2 or UV light has a negligible effect when used alone. The effect of TiO2 dosage, initial pH of dye solution and the solution area exposed to UV light were studied. It is found that in the investigated range, degradation rate of methyl orange increases with the increase in TiO2 concentration and exposure area of solution. Acidic media is fvaourable to methyl orange degradation. The photodestruction of methyl orange is significantly inhibited by addition of KI as active holes scavenger at pH 2. However, the roles of ·OH and H2O2 are increased gradually as the increase of initial pH value of dye solution. Source


Qu X.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong
Asian Journal of Chemistry | Year: 2013

Photocatalytic nanocomposite films with different number of bilayers were prepared on microscopic glass slides via an electrostatic layerby- layer self-assembly method. Atomic force microscopy measurement was used to observe surface morphology of layer-by-layer films. The atomic force microscopy results prove that TiO2 nanoparticles are successfully incorporated into the thin films. Photocatalytic activity of TiO2-containing multilayer films was evaluated by measuring the degradation efficiency of methyl orange. Examination of the effects of experimental factors shows that photodegradation efficiency of methyl orange increases with increasing the number of bilayers of (PSS/TiO2)n films and the highest removal efficiency is obtained when the acidity of solution is 2. The kinetic data demonstrate that the photocatalytic degradation of methyl orange conforms to the apparent first-order reaction dynamics. Immobilization of catalysts on glass slides solves the problem of recovery and may lower the costs of wastewater treatment. Source


Wu P.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong | Chen X.,University of Cincinnati | Li J.,CAS Hefei Key Laboratory of Novel Thin Film Solar Cells | Huang Y.,University of Cincinnati
Computational and Theoretical Chemistry | Year: 2014

Theoretical studies were carried out to investigate the pyrolysis of O-methyl S-alkyl and S-methyl O-alkyl thiocarbonates, where alkyl groups referred to ethyl, isopropyl and t-butyl groups. Eight possible pathways were found, of which three pathways would generate the alkene products. Not only thermal elimination pathways were calculated, other possible mechanisms, such as rearrangements and nucleophilic substitutions, were also considered. MP2/6-31G(d) level was employed to carry out the calculation and the progress of the reactions was followed by the Wiberg bond indices. © 2014 Elsevier B.V. Source


Li H.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong | Xin B.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong | Xin Z.,China National Offshore Oil Corporation | Chen S.,China National Offshore Oil Corporation
Journal of the Chemical Society of Pakistan | Year: 2013

Advanced self-assembly technique which combined self-assembled with absorbing process to prepare the films of [Cntespim]X on Al surfaces was described. Compared with selfassembly technique, advanced self-assembly approach could obtain more hydrophobic surface due to their high compactness, while was more facile and more economic. In the meantime, the effect of chemical composition of ionic liquids (ILs) on wettability was studied. For a fixed cation, the effect of anions on hydrophobicity of [Cntespim]X was in the order: Tf2N- < PF6- < BF4- < Br-. When the counteranion was fixed, the value of contact angle (CA) was improved with the increasing of the chain length. It was found that the contact angle of advanced [C12tespim] Tf2N film could be up to 127±2° on commercial Al surfaces, while that of the corresponding SAM of was only 97±2°. Source


Li Y.,Dezhou University | Li Y.,Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong | Zhong H.,Dezhou University | Zhong H.,Shandong Academy of Sciences
Journal of the Chemical Society of Pakistan | Year: 2013

A method of determination of five flavonoids in Saussurea involucrata by Β-cyclodextrin modified capillary zone electrophoresis has been developed.The effects of buffer pH and buffer concentration, applied voltage and Β-CD concentrations on the separation were systematically investigated. The optimum condition providing baseline separation of all compounds within 8 min was obtained in the 20 mmol·l-1 borax buffer (pH 9.2), 20 kV applied voltage and 8 mmol·l-1 Β-CD. The linearity, detection limits, limits of quantification, reproducibility and recovery were satisfactory. The Β-cyclodextrin modified capillary zone electrophoresis method proposed here has been satisfactorily employed to analyze S. involucrate samples. Source

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