Photoelectrochemical Response of TIVO4 and InVO4:TIVO4 Composite

This work presents photoclectrochemical characteristics of TIVO4, a previously uncharacterized candidate for photocatalytic water splitting Additionally, a composite of InVO4 and TIVO4 was synthesized by a facile solution method using orthorhombic InVO4 as a seed for growth of crystallographically similar orthorhombic TIVO4 Photoelectrochcmical measurements indicate an increase in photocurrent and more negative flatband potentials for TIVO4 and the InVO4.TIVO4 composite relative to InVO4 Diffuse reflectance UV-visible measurements were used to determine bandgaps of 3.50 eV, 2 94 eV, and 2 98 eV for InVO4, TIVO4, and InVO4:TIVO4, respectively Density functional theory (DFT) calculations were performed to elucidate the band structures and correlate well with experimental data. The results indicate higher photoclectrochemical activity for TIVO4 and the InVO4.TIVO4 composite relative to InVO4.