Effect of synthesis conditions  on  methylene blue adsorption capacity of electrochemically preparated graphene

Hao Pham Van, Linh Ha Xuan, Oanh Phung Thi, Hong Phan Ngoc, Huy Nguyen Nhat, Thanh Dang Van, Dang Nguyen Van

Abstract


This report presents the effect of synthesis conditions on the synthesis of graphene nanosheets via electrochemical exfoliation method for adsorbing methylene blue from aqueous solution. Oxygen-containing functional groups and defects in the material were characterized by Raman and X-ray photoelectron spectroscopy (XPS). As a result, by using voltage of 15 V, (NH4)2SO4 (5%, 250 mL) and KOH (7.5%, 250 mL), the obtained material showed the highest MB adsorption capacity due to the high densities of oxygen-containing groups and defects comparison to other conditions.

Keywords


Graphene; adsorption; electrochemical exfoliation; oxygen-containing groups

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References


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DOI: https://doi.org/10.51316/jca.2020.042

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