AI Article Synopsis
- Graphene oxide was synthesized from rice husk using a modified Hummers' method, with ground pencil leads as a control to ensure method consistency.
- TiO microspheres were created using a precipitation method with pluronic F127 as a template, and GO derived from rice husk was combined with these microspheres to form composites in different weight ratios.
- The composites showed high removal efficiencies (99-100%) for cationic dye methylene blue under UV light, outperforming GO and TiO individually, and can be reused multiple times due to their effective adsorption and photodegradation capabilities.
Article Abstract
Graphene oxide (GO) was synthesized utilizing rice husk (RH) as the starting raw material via a modified Hummers' method. Ground pencil leads were used as a control powder of the starting raw material to monitor the consistency of the synthesis method. TiO microspheres were synthesized via a precipitated method using the pluronic F127 solution as the pore template. GO derived from RH (GO-RH) was composited with TiO microspheres as GO-RH/TiO composites by an impregnation method with weight ratios of 3:1, 2:2, and 1:3. Characterized results revealed GO-RH formed a ternary phase material of graphene oxide, graphite oxide, and silica. A typical microstructure of the calcined TiO microspheres was found as the agglomerated anatase nanoparticles. Furthermore, the composites belong to large surface areas and numerous oxygen-containing functionalities on their surfaces. Removal efficiencies of cationic dye methylene blue (MB) from aqueous solutions by the composites, GO-RH and TiO, were studied under UV illumination for 180 min. Due to the effective combination of adsorption and photodegradation for the MB removal, the composites provided the higher efficiencies (99-100%) faster than those of GO-RH and TiO and could be reused at least 4 times. Finally, a mechanism of the MB removal by the composites was proposed.
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| http://dx.doi.org/10.1007/s11356-022-20176-3 | DOI Listing |
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