| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Synergistic Photocatalytic Dye Oxidation and Hexavalent Chromium Reduction by Chlorine Doped g-C3N4 Nanosheets |
| ZHAO Wenyu1, YI Futao1,2, GAN Huihui2, ZHANG Huining3, QIAN Yongxing3, JIN Huixia3, ZHANG Kefeng3
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1 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004
2 Faculty of Architecture Engineering and Environment, Ningbo University, Ningbo 315211
3 School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100 |
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Abstract Series of chlorine doped g-C3N4 nanosheets were synthesized by thermal condensation and ultrasonic exfoliating methods using melamine and ammonium chloride. The structural and morphological characterization of the as-prepared samples were detected by powder X-ray diffraction pattern (XRD), X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM), UV-Vis diffuse reflection spectra (UV-Vis DRS). The photocatalytic activities of samples with different doping ratio and exfoliation time were evaluated under visible light. Moreover, the mixed pollutant solution containing rhodamine B (RhB) and hexavalent chromium (Cr(Ⅵ)) were photocatalytic degraded by the modified samples. Compared with single pollutant in solution, the treatment efficiency of chlorine doped g-C3N4 nanosheets for RhB and Cr(Ⅵ) in the mixed solution enhance 1.4 times and 2.2 times, respectively. In comparison to bulk g-C3N4, chlorine doped g-C3N4 nanosheets sample possessed larger specific surface, better optical absorption performance and better charge separation capability. The separation of photo-excited holes and electrons is promoted by the simultaneously photocatalytic oxidation of RhB and reduction of Cr(Ⅵ), which lead to the synergistic treatment of RhB and Cr(Ⅵ) in mixed solution.
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Published: 03 September 2019
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| About author:: Wenyu Zhaorecieved his B.E. degree in enviromental engineering from Guilin University of Technology in Jun. 2003 and Ph.D drgree in environmental eninee-ring from Nankai University in Jun. 2006. He was appointed to Guilin University in Jul. 2003, and is currently an associate professor. He has published more than 20 journal papers as the first author, applied more than 10 national invention patents and 6 of them were authorized. His interests focus on water & wastewater treatment theory and technology.Huihui Gan, obtained her Ph.D. degree in Wuhan University of Technology in 2013. She is currently an associate professor at Ningbo University, a visiting scholar at University College Dublin in 2015. She was selected for Leading and top-notch talents in Ningbo program. Her research interests focus on water treatment advanced oxidation technology and new material development. She was published nearly 20 SCI/EI journal papers, authorized 6 invention patents, and served as reviewers for several academic journals. |
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2019, Vol. 33 
