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Research articles

ScienceAsia 50 (2024):ID 2024066 1-9 |doi: 10.2306/scienceasia1513-1874.2024.066


Preparation of calcium oxide/graphitic carbon nitrides (CaO/g-C3N4) composite for photocatalyst dye degradation


Chinanun Chaisrisongkram, Thutiyaporn Thiwawong, Korakot Onlaor, Benchapol Tunhoo?

 
ABSTRACT:     Dye degradation properties of composited calcium oxide (CaO) and graphitic carbon nitride (g-C3N4 ) were studied. The CaO and g-C3N4 nanoparticles were derived under separate thermal calcination processes from eggshells and melamine, respectively. Physical properties of the synthesized CaO and g-C3N4 were investigated by X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The synthesized CaO and g-C3N4 nanoparticles were, then, composited at various concentrations, and the photocatalytic behaviors of the composited samples were investigated in an aqueous solution of methylene blue, with a irradiation source of 220 W white light-emitting diode lamp. Results showed that the optimal ratio of the composite material for dye degradation was 10% CaO:90% g-C3N4 , giving 95.89% degradation efficiency with an exposure time of 15 min and degradation rate of 0.1727 min?1 .

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a Electronics and Control System for Nanodevice Research Laboratory, College of Materials Innovation and Technology, King Mongkut?s Institute of Technology Ladkrabang, Bangkok 10520 Thailand

* Corresponding author, E-mail: benchapol.tu@kmitl.ac.th

Received 22 Jun 2023, Accepted 12 Jun 2024