Journal
CHEMOSPHERE
Volume 193, Issue -, Pages 237-243Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.11.015
Keywords
g-C3N4; Charcoal; Chromium(VI) reduction; Photocatalysis; Wastewater treatment; Photobleaching of methylene blue
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Funding
- National Research Council of Thailand
- Thailand Research Fund (TRF) [BRG 6080002]
- Environmental Science Research Center (ESRC), Faculty of Science, Chiang Mai University
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The visible light driven photoactivity of g-C3N4 can be enhanced using charcoal as a supporter. Charcoal/g-C3N4 composite materials were prepared by the simultaneous thermal condensation of melamine and charcoal. The effect of different atmospheres (O-2, air, and argon) on the reaction was investigated. The effect of different weight ratios of charcoal to melamine (1:1 and 1:4 wt%) was also investigated. The physical properties of the charcoal/g-C3N4 materials were analyzed using XRD, SEM, TEM, XPS, BET and FTIR techniques. It was found that an oxidation reaction of charcoal and g-C3N4 during preparation greatly affected the photoactivity. A composite of charcoal:melamine (1:4 wt%) prepared under an air atmosphere provided good photooxidation of methylene blue; whereas a composite of charcoal:melamine (1:4 wt%) prepared under an oxygen atmosphere exhibited good photoreduction of chromium (VI). (C) 2017 Elsevier Ltd. All rights reserved.
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