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Wenshuai Zhu,Huaming Li,Yehai Xu,Bilian Dai,Hui Xu,Chao Wang,Yanhong Chao,Hui Liu 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.2
Three types of TiO2 were synthesized by a hydrolysis and calcination method. The catalysts were characterizedby X-ray powder diffraction (XRD), diffuse reflectance spectrum (DRS), Raman spectra, and X-ray photoelectronspectroscopy (XPS). The XRD and Raman spectra indicated that amorphous TiO2 was successfully obtained at100 oC. The results indicated that amorphous TiO2 achieved the highest efficiency of desulfurization. The photocatalyticoxidation of dibenzothiophene (DBT), benzothiophene (BT), 4,6-dimethyldibenzothiophene (4,6-DMDBT) anddodecanethiol (RSH) in model oil was studied at room temperature (30 oC) with three catalysts. The system containedamorphous TiO2, H2O2, and [Bmim]BF4 ionic liquid, ultraviolet (UV), which played vitally important roles in the photocatalyticoxidative desulfurization. Especially, the molar ratio of H2O2 and sulfur (O/S) was only 2 : 1, which correspondedto the stoichiometric reaction. The sulfur removal of DBT-containing model oil with amorphous TiO2 couldreach 96.6%, which was apparently superior to a system with anatase TiO2 (23.6%) or with anatase - rutile TiO2 (18.2%). The system could be recycled seven times without a signicant decrease in photocatalytic activity.
Jun Xiong,Jing Luo,Lei Yang,Jingyu Pang,Wenshuai Zhu,Huaming Li 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-
Boron defect engineered boron nitride (BN) nanosheets have been prepared with the barbituric acid as co-reactant sources. By virtue of B defects, the electronic structure of BN undergo significantly variation, in which the conduction band of BN declined from −1.35 to −0.54 eV and decreased chemical acid hardness. After B defect engineering, BN nanosheets display greatly improved adsorptive desulfurization performance towards dibenzothiophene (DBT), with optimized adsorption capacity of 43.6 mgS g−1 for model oil. The increased adsorptive desulfurization performance was derived from decreased chemical acid hardness by B defect engineering, thus can build preferable interplay between the soft base DBT.