Mesoporous ZnO-NiO architectures for use in a high-performance nonenzymatic glucose sensor

Mesoporous ZnO-NiO architectures were prepared by thermal annealing of zinc-nickel hydroxycarbonate composites. The resulting architectures are shown to be assembled by many mesoporous nanosheets, and this results in a large surface area and a strong synergy between the ZnO and NiO nanoparticles. The material obtained by annealing at 400 degrees C was used as an electrode that responds to glucose over a wide concentration range (from 0.5 mu M to 6.4 mM), with a detection limit as low as 0.5 mu M, fast response time (<3 s), and good sensitivity (120.5 mu A.mM(-1).cm(-2)).