Onion-like carbon modified porous graphitic carbon nitride with excellent photocatalytic activities under visible light |
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| Affiliation: | 1. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150080, China;3. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China |
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| Abstract: | A series of onion-like carbon modified porous g-C3N4 (OLC/pg-C3N4) composites have been fabricated by a simple ultrasonic adsorption approach. The resultant OLC/pg-C3N4 composites exhibit excellent photocatalytic activity and stability towards the degradation of the dyes and phenol in aqueous solution under visible-light irradiation. The composite with 2.0 wt% OLC content shows the optimal photocatalytic activity for degrading rhodamine B (RhB), its rate constant is about three times that of pure pg-C3N4. The improved photocatalytic activity is mainly attributed to the synergetic effect of pg-C3N4 and OLC, including larger surface area, stronger visible light adsorption and efficient separation of photogenerated electrons and holes. Moreover, a possible mechanism of photocatalytic reaction over OLC/pg-C3N4 composite is proposed. |
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| Keywords: | Onion-like carbon Photocatalyst Visible light Pollutants |
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