Photocatalytic degradation of organic dyes using reduced graphene oxide (rGO)

Abstract

Photocatalysts have developed into a successful strategy for degrading synthetic and organic toxins, such as chemicals and dyes, in wastewater. In this study, graphene oxide was reduced at different temperatures and used for degrading indigo carmine and neutral red dyes. The wide surface areas, strong adsorption sites, and oxygen functionalities of reduced graphene oxide (rGO) at 250 °C (rGO-250) produced more photocatalytic degradation efficiency and adsorption percentage. The catalyst dosage, initial dye concentration, solution pH and recyclability were all used to optimize the photocatalytic activity of rGO-250. This research presents a capable nano-adsorbent photocatalyst for the efficient degradation of organic dyes. GO and rGOs were also investigated for carbon dioxide (CO₂) absorption properties. Results showed that rGO-250 has better CO₂ adsorption properties than other rGOs. Overall, it was observed that rGO-250 has better photocatalytic and CO₂ adsorption capabilities compared to graphene oxide reduced at different temperatures.