| Summary: | UV light-active photocatalyst of ZnO/g-C3N4 was synthesized by a facile mixing method with different ratio of g-C3N4 (0.01, 0.03, 0.05, 0.07, and 0.09 g). The photocatalytic activity of ZnO/g-C3N4 was tested towards methyl orange (MO) dye in aqueous solution using a low UV light intensity (7W). FTIR spectroscopic results obtained show the functional groups spectrum corresponding to the ZnO and g-C3N4. Besides, SEM results also show the formation of heterogenous photocatalysts as irregular shape particles of ZnO interlink with g-C3N4 surface. EDX analysis confirms the presence of Zn, C, O, and N elements correspond to ZnO/g-C3N4 photocatalyst. From the results obtained, ZG3 (0.1:0.03) photocatalysts exhibit almost complete removal of methyl orange under UV irradiation in a period of 60 min (~95%). The highest degradation rate constant of 5.26 × 10-2 min−1, based on pseudo-first-order kinetics is estimated. The best photocatalyst (ZG3) showed high potential in degrading MO under low UV light intensity which can be used for photocatalytic water remediation application. © 2024, Malaysian Society of Analytical Sciences. All rights reserved.
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