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.

Design and synthesis of LDH nano composite functionalized with trimesic acid and its environmental application in adsorbing organic dyes indigo carmine and methylene blue

“…Different and special adsorbents, including layered-double hydroxides, CNTs (Carbon nanotubes) [ 23 , 24 ], graphene oxide [ 25 ], agricultural waste [ 26 , 27 ], activated carbons [ 28 ], clay [ 29 ], zeolite [ 30 ], polymers [ 31 , 32 ], Covalent organic frameworks (COFs) are a class of crystalline porous polymers possessing large surface area, nanoporous properties, and superior thermal stability [ 33 , 34 ], Mixed metal sulphides (MMSs) because of their better electrical and redox reactions [ 35 ], reactive oxygen species (ROS) are widely recognized to comprise both superoxide (·O 2 − ) and hydroxyl (·OH − ) radicals [ 36 ], were investigated to evaluate their ability for water treatment. While, adsorbents derived from layered double hydroxides (LDH) due to their outstanding adsorption abilities, this adsorbent are a class of adaptable materials that have attracted substantial attention in numerous scientific and industrial domains.…”