Keywords
Dibenzothiophene
Al2O3/g-C3N4
Photocatalytic oxidation
Kinetics.
How to Cite
Abstract
Al2O3/g-C3N4 heterojunction is fabricated for the photocatalytic removal of dibenzothiophene in oil-water biphasic system and the reaction kinetics is studied. The influences of Al2O3/g-C3N4 ratio and photocatalyst dosage on reaction rate constant are investigated. The results indicate that the optimum addition of Al2O3/g-C3N4 composite is 0.075 g in 100 mL reaction system and the photooxidation kinetics of dibenzothiophene follows first-order reaction. The sulfur removal of dibenzothiophene can reach 90.3 % in 4 h under the irradiation of mercury lamp and the sulfur content can be decreased from 200 to below 20 ppm.References
Zhai LZ, Zhong Q, He C, Wang J. Hydroxyl ammonium ionic liquids synthesized by water-bath microwave: Synthesis and desulfurization. J Hazard Mater 2009; 161: 1360-1368.
Li FT, Kou CG, Sun ZM, Hao YJ, Liu RH, Zhao DS. Deep extractive and oxidative desulfurization of dibenzothiophene with C5H9NO•SnCl2 coordinated ionic liquid. J Hazard Mater 2012; 205-206: 164-170. http://dx.doi.org/10.1016/j.jhazmat.2011.12.054
Ko NH, Lee JS, Huh ES, Lee H, Jung KD, Kim HS, Cheong M. Extractive desulfurization using Fe-containing ionic liquids. Energy Fuels 2008; 22: 1687-1690. http://dx.doi.org/10.1021/ef7007369
Campos-Martin JM, Capel-Sanchez MC, Perez-Presas P, Fierro JLG. Oxidative processes of desulfurization of liquid fuels. J Chem Technol Biotechnol 2010; 85: 879-890. http://dx.doi.org/10.1002/jctb.2371
Li FT, Liu Y, Sun ZM, Zhao Y, Liu RH, Chen LJ, Zhao DS. Photocatalytic oxidative desulfurization of dibenzothiophene under simulated sunlight irradiation with mixed-phase Fe2O3 prepared by solution combustion. Catal Sci Technol 2012; 2: 1455-1462. http://dx.doi.org/10.1039/c2cy00485b
Zhao D, Li F, Han J, Li H. Photochemical oxidation of thiophene by O2 in an organic two-phase liquid-liquid extraction system. Petrol Chem 2007; 47: 448-451. http://dx.doi.org/10.1134/S0965544107060138
Wang C, Zhu WS, Xu YH, Xu H, Zhang M, Chao YH, Yin S, Li HM, Wang JG. Preparation of TiO2/g-C3N4 composites and their application in photocatalytic oxidative desulfurization. Ceram Int 2014; 40: 11627-11635. http://dx.doi.org/10.1016/j.ceramint.2014.03.156
Wang XC, Maeda K, Thomas A, Takanabe K, Xin G, Carlsson JM, Domen K, Antonietti M. A metal-free polymeric photocatalyst for hydrogen production from water under visible light. Nat Mater 2009; 8: 76-80. http://dx.doi.org/10.1038/nmat2317
Wang Y, Wang XC, Antonietti M. Polymeric graphitic carbon nitride as a heterogeneous organocatalyst: from photochemistry to multipurpose catalysis to sustainable chemistry. Angew Chem Int Ed 2012; 51: 68-89. http://dx.doi.org/10.1002/anie.201101182
Li FT, Zhao Y, Wang Q, Wang XJ, Hao YJ, Liu RH, Zhao DS. Enhanced visible-light photocatalytic activity of active Al2O3/g-C3N4 heterojunctions synthesized via surface hydroxyl modification. J Hazard Mater 2015; 283: 371-381. http://dx.doi.org/10.1016/j.jhazmat.2014.09.035
Wu GS, Thind SS, Wen JL, Yan K, Chen AC. A novel nanoporous-C3N4 photocatalyst with superior high visible light activity. Appl Catal B: Environ 2013; 142-143: 590-597. http://dx.doi.org/10.1016/j.apcatb.2013.05.070
Sun JX, Yuan YP, Qiu LG, Jiang X, Xie AJ, Shen YH, Zhu JF. Fabrication of composite photocatalyst g-C3N4–ZnO and enhancement of photocatalytic activity under visible light. Dalton Trans 2012; 41: 6756-6763. http://dx.doi.org/10.1039/c2dt12474b
Li FT, Zhao Y, Liu Y, Hao YJ, Liu RH, Zhao DS. Solution combustion synthesis and visible light-induced photocatalytic activity of mixed amorphous and crystalline MgAl2O4 nanopowders. Chem Eng J 2011; 173: 750-759. http://dx.doi.org/10.1016/j.cej.2011.08.043
Gonçalves MST, Oliveira-Campos AMF, Pinto EMMS, Plasência PMS, Queiroz MJRP. Photochemical treatment of solutions of azo dyes containing TiO2. Chemosphere 1999; 39: 781-786. http://dx.doi.org/10.1016/S0045-6535(99)00013-2
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright (c) 2015 Rui-Hong Liu; Fa-Tang Li