Mesoporous anatase TiO₂ embedded with CdO nanoparticles as efficient electrode material for electrochemical determination of pyridoxine

With the aim of designing electrode surface with porous materials, facile synthesis method to generate mesoporous architectures that are activated with conductive metal oxide as dopants with high thermal stability is of huge demand. The present work demonstrates the robust synthesis of CdO nanocrystals incorporated on the mesoporous TiO₂-based materials for electrochemical detection of pyridoxine. Herein, the presence of mesoporous structure on the surface of TiO₂ could act as host matrix, whereas the CdO acts as hetero-metal oxides loaded on the host matrix, which together combined to deliver large enhancement in pyridoxine oxidation response. The resulting nanocomposite will collectively deliver 1. Improvement in electron conducting pathways when vacant mesoporous sites are occupied with CdO nanocrystals 2. Enhancement in the current response for oxidation of pyridoxine due to large surface area and high conductivity offered by synergetic effect between TiO₂ and CdO. The DPV response toward determination of pyridoxine exhibited a linear response within the concentration range from 0.5 µM to 45 µM, with a detection limit of about 0.2 µM. Therefore, these results collectively provide the activation of vacant mesoporous sites with metal oxides as dopants will effectively improve the electrochemical response for wide range of analytes with large enhancement in the sensitivity and selectivity. These mesoporous materials could also be employed as fruitful electrocatalyst for various electrocatalytic applications.