Green synthesis of reduced graphene oxide using bagasse and its application in dye removal: A waste-to-resource supply chain

Graphene is usually synthesized through deoxygenation of graphene oxide (GO) by hydrazine which functions as a reducing agent, but the production of graphene via this method suffers a high cost and is often regarded to be not environmental-friendly. In this work, we developed a simple and efficient...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2019-03, Vol.219, p.148-154
Main Authors: Gan, Li, Li, Beibei, Chen, Yuan, Yu, Bing, Chen, Zuliang
Format: Article
Language:English
Subjects:
Adsorption
Bagasse
Dye removal
rGO
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Summary:Graphene is usually synthesized through deoxygenation of graphene oxide (GO) by hydrazine which functions as a reducing agent, but the production of graphene via this method suffers a high cost and is often regarded to be not environmental-friendly. In this work, we developed a simple and efficient method for the green reduction of GO to reduced graphene oxide (rGO) dispersed on sugarcane bagasse derived from rGO/bagasse material. The rGO/bagasse was characterized by Scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, Thermogravimetric analysis, X-ray photoelectron spectroscopy and X-ray diffraction analysis. All these characterization techniques clearly revealed that the rGO has been successfully prepared by reduction sugars. In addition, rGO synthesized from bagasse was considered as a promising adsorbent for removing methyl blue. Adsorption kinetics were also applied to stimulate the adsorption process, and the adsorption behavior of this new adsorbent fits well with the pseudo-second-order kinetic model (R2 = 0.98). Finally, the cycling experiments for MB adsorption by bagasse synthesized rGO confirmed that the as-prepared rGO was reusable. Taken together, all results in this work provided the new insights into the green reduction of GO by bagasse, and the formation of rGO/bagasse material presented a great potential in the disposal of dye waste water. •A simple and efficient method was used for the green reduction of GO.•The rGO has been prepared by reduction sugars.•Hybrid RGO/bagasse was successfully used to remove methyl blue.•RGO/bagasse was reusable.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2018.11.181