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| Preparation and photocatalytic activity of g-C3N4/rGO composite |
| YIN Jing, LIAO Gao-zu, ZHU Dong-yun, LU Ping, LI Lai-sheng |
| School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China |
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Abstract Graphitic carbon nitride/reduced graphene oxide (g-C3N4/rGO) composite was synthesized by grinding and calcination process. Then it was characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), and photoluminescence spectra (PL). The photocatalytic activity of g-C3N4/rGO was evaluated by degrading rhodamine B (RhB) under simulated solar light irradiation. The results of PL analysis demonstrated that the recombination of photo-generated electrons and holes was inhibited compared with pure g-C3N4. The results of photocatalytic degradation of RhB showed that the removal efficiency of RhB with g-C3N4/rGO(2%) composite in 180min was improved by 43.2% compared with pure g-C3N4, which was attributed to the facilitated electrons transfer in g-C3N4/rGO composite. The main oxidative species was also detected by addition of TBA and TEOA in the photocatalytic process. The result suggested that holes were mainly responsible for the degradation of RhB in g-C3N4/rGO photocatalytic system.
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Received: 15 June 2015
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