Enhanced photo-induced charge separation and solar-driven photocatalytic activity of g-C3N4 decorated by SO42? |
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| Affiliation: | 1. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China;2. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China;3. Sichuan Tianren Chemical Engineering Co. Ltd., Chengdu 610031, PR China;1. Laboratory of physical materials – University of Laghouat, BP 37G, Laghouat, Algeria;2. Laboratoire de Matériaux Semi Conducteurs et Métalliques «LMSM», Université de Biskra, Algeria;3. Laboratoire de Physique des Rayonnements, Université Badji Mokhtar Annaba, Algeria;1. State Key Discipline Laboratory of Wide BandGap Semiconductor Technology, School of Microelectronics, Xidian University, Xi''an 710071, PR China;2. School of Physics and Optoelectronic Engineering, Xidian University, Xi''an 710071, PR China;3. Faculty of Science, University of Paris-Sud, Paris 91400, France;4. Faculty of Information Engineering & Automation, Kunming University of Science and Technology, Kunming 650051, PR China;1. School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa;2. Department of Physics and Engineering Physics, Obafemi Awolowo University Ile-Ife, Nigeria;1. College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi 330022, China;2. College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China;3. College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan 414006, China |
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| Abstract: | SO42? decorated g-C3N4 with enhanced photocatalytic performance was prepared by a facile pore impregnating method using (NH4)2S2O8 solution. The photocatalysts were characterized by the Brunauer–Emmett–Teller (BET) method, X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and surface photovoltage (SPV) spectroscopy, respectively. The separation efficiency of photo-generated charge was investigated using benzoquinone as scavenger. The results demonstrate that sulfating of g-C3N4 increases the adsorption of rhodamine B on g-C3N4, the hydroxyl content and the separation efficiency of photo-generated charge. The photocatalytic activity of SO42?/g-C3N4 for decolorization of rhodamine B and methyl orange (MO) aqueous solution was evaluated. The result shows that loading of 6.0 wt% SO42? results in the best photocatalytic activity under simulated solar irradiation and SO42? play an important role in boosting the photocatalytic activity. |
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| Keywords: | Sulfating Photo-generated charge separation Photocatalytic performance |
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