Enhanced in tunning of photochemical and electrochemical responses of inorganic metal oxide nanoparticles via rGO frameworks (MO/rGO): A comprehensive review

[Display omitted] •The MO/rGO nanocomposites can be synthesized by chemically and physical routes.•The increase in electronic conductivity of MO can be enhanced by rGO framework.•The synergetic properties of MO/rGO play an important role towards photochemical and electrochemical behaviour. The inorganic metal oxides and graphene in the form of nanocomposites have excellent potential application towards various practical usages. In this review, we have discussed recent research on MO-specific transition metal oxides (TMO) (e.g., Ti, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, W) and rare earth metal oxides (REMO) (e.g., La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Er, Yb) anchored on reduced graphene oxide (rGO) nanocomposites that are being developed for photochemical applications such as degradation of aqueous pollutants and electrochemical behaviour including supercapaciors, Li-ion energy storage, and sensing. Also, we have discussed some future nano MO/rGO composite materials.