SrTiO3 nanocubes doped with ir as photocatalytic system for enhancing H2 generation from water splitting

Abstract

Designing an effective photocatalyst for hydrogen (H2) performance under visible irradiation with a decrease the band gap energy of semiconductor has been considered as an essential aspect in boosting the performance of photocatalytic reactions. Herein, we focus on evaluating the role of doping with Ir into SrTiO3 structure fabricated by hydrothermal method for H2 generation. The crystalline characteristics the Ir-SrTiO3 photocatalyst were carried out via XRD and FE-SEM. The chemical composition and the optical properties of the Ir-SrTiO3 were classified by EDX and UV-Vis spectra, respectively. The results showcased that the dramatically improved absorbing performances of Ir/SrTiO3 specimen could be governed by the presence of Ir impurity states in the forbidden energy gap causing a decrease in energy gap of SrTiO3. This work also revealed that Ir doped into SrTiO3 exhibited excellent photocatalytic H2 evolution compared with pristine SrTiO3 (~454 and ~325 mmol.h-1.g-1 H2 production under UV and visible light irradiation, respectively). A rational photocatalytic mechanism is projected to be able provide significant awareness for further research.

Photocatalytic activity enhancement for removal of dye molecules based on plasmonic Ag grafted TiO2 nanocubes under visible light driven

“…Therefore, the disintegration of poisonous organic for environmental purification based on green technologies and energy-efficient has attracted enormous attention. Recently, photocatalysis regarded as one of the advanced green technologies for environmental purification with zero harmful emissions and without additional pollutant emission has become one of the hot topics in the field of environmental remediation practice with the aid of light [4][5][6] . Among these various semiconductor materials, TiO 2 has been proved to be a promising candidate because of its chemical and biological inertness, high photo corrosion resistance, low cost, and environmentally friendly 7,8 .…”