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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Electronics and Control System for Nanodevice Research Laboratory, College of Materials Innovation and Technology,
King Mongkut?s Institute of Technology Ladkrabang, Bangkok 10520 Thailand
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* Corresponding author, E-mail: benchapol.tu@kmitl.ac.th
Received 22 Jun 2023, Accepted 12 Jun 2024
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