Journal
CHEMOSPHERE
Volume 303, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.135121
Keywords
Graphene aerogel; Bismuth oxyiodide; Methyl orange; Composites; Photocatalysis
Categories
Funding
- NSRF by the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B16F640143]
- second-century fund (C2F)
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In this study, a novel graphene aerogel/bismuth oxyiodide (GA/BiOI) composite photocatalyst was successfully synthesized and tested for the efficient removal of methyl orange (MO) from wastewater under visible light. The composite exhibited enhanced photocatalytic activity, stability, and potential as an eco-friendly photocatalyst.
Development of novel and eco-friendly composite photocatalysts for the efficient removal of contaminants from wastewater is the need of the hour. In this study, visible light responsive novel graphene aerogel/bismuth oxyiodide (GA/BiOI) composite was synthesized via low-temperature solvothermal method. The synthesized GA/ BiOI composite was tested for methyl orange (MO) azo-dye degradation under visible light. The graphene aerogel nanosheets were wrapped onto the surface of the each individual BiOI microsphere, which encourages the interconnection charge transfer process. The light absorption properties of GA/BiOI composite were increased with the addition of graphene aerogel. The optimal 5%-GA/BiOI composite displayed higher MO removal efficiency, which is similar to 2 fold more than the bare BiOI photocatalyst. This enhanced photocatalytic activity was on account of lower recombination rate of charge carriers, improved light absorption, and the high surface area. In addition, the 5%-GA/BiOI composite showed good stability until 3 cycles without deactivation. The plausible MO
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