Fig. 4From: Efficiently Visible-Light Driven Photoelectrocatalytic Oxidation of As(III) at Low Positive Biasing Using Pt/TiO2 Nanotube ElectrodeUV-vis diffuse reflectance spectra of TiO2 nanotubes and Pt/TiO2 nanotubes. The Pt deposition current density was 0.5 mA cm−2 and deposition time was 5 minBack to article page