Abstract
Novel graphitic-carbon nitride (g-C3N4) photocatalyst was synthesized by thermal-pyrolysis of melamine. Pyrolysis reaction temperature (500–700 °C) and gas atmosphere, were optimized to achieve an efficient visible light active photocatalyst. In-depth studies indicate that the reaction temperature of 650ᵒC is an optimum condition for the synthesis of the g-C3N4 photocatalyst. Air atmosphere dominantly favoured a formation of layered g-C3N4structure compared to those pyrolyzed under argon or nitrogen atmosphere. In contrast to other samples, the optimized g-C3N4 photocatalyst showed significant photodegradation, with a degradation rate of 4.4 × 10−2 min−1, for Rhodamine B(RhB) degradation under simulated solar radiation. A large surface area of 42 m2g-1 and suitable band energetics is attributed to better degradation performance.
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