The new generation of glucose biosensors has gained immense research interest owing to its cost effectiveness, quick response, good stability, reproducibility, and low detection limit. The enzymatic glucose sensor suffers from numerous intrinsic disadvantages; therefore, there is a need to develop a new biosensor which can overcome the disadvantages of enzymatic glucose biosensors. In that context, metal oxide-based nanostructures and their compostites exhibit properties that can overcome the drawbacks of enzymatic glucose sensors. This review discusses recent developments in some of the metal oxides (CoO, NiO, CuO, and ZnO) along with their composites as well as their applications toward nonenzymatic glucose sensors. The metal oxide composites possess excellent features which signify the potential commercial applications of metal oxide-based composites for nonenzymatic electrochemical glucose sensing.

No abstract

No abstract

Two-dimensional graphene oxide (GO) nanosheets with high electrical conductivity and electrochemical stability are employed as a hybridization matrix to improve the electrode performance of layered double hydroxides (LDHs). A cobaltchromium-LDH hybridized with a GO matrix leads to anchored Co-Cr-LDH-GO (CCG) self-assembly with a high surface area, mesoporous morphology, high electrical conductivity, and high charge transfer kinetics. The CCG nanohybrids display enhanced specific capacity (1502 C g −1 ) with high-rate characteristics compared to pristine Co-Cr-LDH (591 C g −1 ), signifying the crucial role of GO as a hybridization matrix for improving the electrode performance of LDH materials. Aqueous and all-solid-state hybrid supercapacitors are fabricated using the best-optimized CCG nanohybrid and reduced graphene oxide as an anode and a cathode, respectively. The aqueous device delivers a specific capacitance of 181 F g −1 , a specific energy (SE) of 56.66 Wh kg −1 , and a specific power (SP) of 600 W kg −1 at 0.8 A g −1 . Moreover, the solid-state device delivers a specific capacitance of 130.8 F g −1 , a SE of 46.50 Wh kg −1 , and a SP of 1536 W kg −1 at 1.92 A g −1 . The present study clearly demonstrates the usefulness of conducting GO as an efficient hybridization matrix to improve the electrode performance of LDHs.

No abstract