Black 3D-TiO₂ Nanotube Arrays on Ti Meshes for Boosted Photoelectrochemical Water Splitting.

ABSTRACT: Black 3D-TiO₂ nanotube arrays are successfully fabricated on the Ti meshes through a facile electrochemical reduction method. The optimized black 3D-TiO₂ nanotubes arrays yield a maximal photocurrent density of 1.6 mA/cm² at 0.22 V vs. Ag/AgCl with Faradic efficiency of 100%, which is about four times larger than that of the pristine 3D-TiO₂ NTAs (0.4 mA/cm²). Such boosted PEC water splitting activity primarily originates from the introduction of the oxygen vacancies, which results in the bandgap shrinkage of the 3D-TiO₂ NTAs, boosting the utilization efficiency of visible light including the incident, reflected and/or refracted visible light captured by the 3D configuration. Moreover, the oxygen vacancies (Ti³⁺)

SUBMITTER: Meng M 

PROVIDER: S-EPMC9104132 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature