Fabrication of non-enzymatic sensor using Co doped ZnO nanoparticles as a marker of H2O2

A Green Biosensing Matrix Based on Chitosan and Graphene nanohybrid for the Immobilization of Glucose Oxidase: Synthesis and Property evaluation

“…This aspect can also be justified by the fact that hydrothermal treatment with a cationic surfactant (CTAB) generates uniform binding blocks on graphene nano layers which induced the growth of CeO 2 nanoparticles. However, the marginal shift in the diffraction peak was noticed in nano-CeO 2 /RGO nanohybrid which is possibly due to the variation in lattice spacing caused by the successful decoration of CeO 2 and the formation of nano-CeO 2 /RGO nanohybrid [31].…”

Development of electrochemical sensor based on layered double hydroxide as a marker of environmental toxin

“…The LDH-based sensor responds to the variations in the concentration of thiourea which alter the electrical current of LDH [29]. Initially, atmospheric oxygen molecules are physisorbed on the LDH surface.…”

“…Further, when thiourea reacts with pre-adsorbed negatively charged oxygen adsorbates, the trapped electrons are returned to the conduction band of the material. The energy released during the decomposition of adsorbed molecules would be sufficient for the electrons jumping up into the conduction to increase the conductivity of the sensor [29]. Inside the sensor, electrical current flows through the grain boundary of LDH.…”

“…Resistance to this electrical current is caused by negatively charged oxygen at grain boundaries. In the presence of a reducing chemical, a surface catalyzed reaction occurs and the surface density of negatively charged oxygen decreases, thereby increasing the electrical current of the sensor [29]. A schematic view of the proposed reaction mechanism is presented in Fig.…”

“…microscopic model)[29]. The model explains the reactions occurring on the surface of composite nanoparticles in the presence of a hazardous chemical.…”