Photoelectrochemical study of anodized TiO2 Nanotubes prepared using low and high H2O contents

Electrochemical Deposition of Conformal Semiconductor Layers in Nanoporous Oxides for Sensitized Photoelectrodes

Nanoporous photoelectrodes with photoactive semiconductors have been investigated for various energy applications such as solar cells and photoelectrochemical cells, but the deposition of the semiconducting materials on the nanoporous electrodes has been very challenging due to pore clogging or complete pore filling. Here, we propose a band alignment model that explains the morphology of the electrochemically deposited semiconductor layer on the semiconducting nanoporous oxide electrode. Briefly, the coating material with a conduction band edge higher (i.e., more negative) than that of the electrode material forms a conformal coating, which maintains the initial nanoporous structure. As a result, a conformal CdSe layer can be electrodeposited onto TiO₂ nanotubes, which can be used as a photoelectrode of a sensitized solar cell. The electron dynamics studies revealed that the CdSe-sensitized TiO₂ nanotube electrode exhibited faster charge transport and slower charge recombination than its dye-sensitized counterpart, which has been ascribed to the passivation of surface traps and the physically blocked back-electron transfer by the CdSe layer as well as the higher conduction band of CdSe.

Photoelectrochemical performance of g-C3N4/Au/BiPO4Z-scheme composites to improve the mineralization property under solar light

g-C₃N₄/Au/BiPO₄as a hierarchical Z-scheme system was prepared through three steps at different reaction temperatures, using thiourea as a precursor to synthesize g-C₃N₄.

Simulation of anodizing current–time curves and the morphology evolution of TiO2 nanotubes obtained in phosphoric electrolytes

The simulation and separation of anodizing current density–time curves obtained in mixed electrolytes.