Graphene as gas sensors and adsorbents for various dyes, oil spills: A perspective

Abstract

Graphene-based materials have developed as capable applicants as adsorbents for various dyes. Low costs of production, high surface area, large porosities and large number of modification methods make them excellent materials for sensors, adsorption studies and removal of toxic compounds such as pesticides, dyes, oil spills, antibiotics, etc. from aqueous solutions. In recent years, there have been many structural modifications in the 2-D graphene sheet for synthesizing superior materials such as graphene-metal composites, metal oxide composites, bio-composites, hydrogels, etc. for improving the structural properties and widen its applications. In this review, we have incorporated the examples from both experimental and density func-tional theory studies (DFT) for adsorption of various dyes and oils spills on pristine and modified graphene sheets.