Antimony Doped Tin Oxide Nanoparticles Deposited onto Nb−TiO2 Nanotubes for Electrochemical Degradation of Bio-refractory Pollutions

To improve the service life of SnO 2 −Sb electrodes in degradation of refractory wastewater, we report anodic information of tin oxide antimony on top of Nb−TiO 2 nanotubes (Nb−Ti/Nb−TiO 2 −NTs/ATONPs) prepared through screen-printing. It was found that the Nb−Ti/Nb−TiO 2 −NTs/ATONPs anodes presented a significantly enhanced in electro-catalytic oxidation performance (in Acid Red 73) compared to titanium-based tin antimony electrodes (Ti/ATONPs). Additionally, the electrochemical properties and the stability were further studied by the electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), cyclic voltammetry (CV), chronoamperometry (CA) measurements and accelerated life test, respectively. These results indicated that Nb−TiO 2 −NTs/ATONPs anode possessed Nb−TiO 2 nanotubes which exhibited a higher oxygen evolution potential (2.24 V vs. Ag/AgCl), as well as a better wettability, a larger current at constant potential and 2.1 times longer lifetime than the conventional Ti/ATONPs anode.