Effect of Oriented Assemblies of SrTiO₃ with Exposed (200) Plane on Photocatalytic Hydrogen Evolution

Abstract

This study aims to investigate the effect of crystallographic orientation of the assemblies of SrTiO3 (formed on a glass substrate) on photocatalytic hydrogen evolution. For this, we have successfully synthesized nanocubes of SrTiO3 through a hydrothermal method. Assemblies on the glass substrate were formed by using functionalized/non‐functionalized oxide over functionalized/non‐functionalized glass substrate. The functionalization of the oxides and the glass substrate was carried out using IPTMS (3‐iodopropyltrimethoxy silane). Uniform assemblies of nanocubes of SrTiO3 with the particles oriented with (200) plane as the exposed surface were formed. The performance of these oriented assemblies was evaluated for photocatalytic hydrogen evolution reaction. Theoretical studies were carried out to understand the mechanism of photocatalytic hydrogen evolution over the oriented assemblies of SrTiO3.

Electrocatalytic OER behavior of the Bi–Fe–O system: an understanding from the perspective of the presence of oxygen vacancies

“…Many reports in the literature support this fact. In one of our studies, 24 we have also shown that oxygen vacancies present in oriented assemblies of SrTiO 3 had a significant role in the HER. The presence of defect structures is a result of various factors.…”

“…The peak centered at ∼531 eV corresponds to the presence of defects that are created due to oxygen vacancies in the oxide. 24–28 Thus, analysis of the oxides using XPS confirmed the presence of defects arising due to oxygen vacancies. This observation led us to analyze further the oxides for the nature of the vacancies and their concentration.…”

Urine Metabolic Profiling for Rapid Lung Cancer Screening: A Strategy Combining Rh-Doped SrTiO3-Assisted Laser Desorption/Ionization Mass Spectrometry and Machine Learning

“…The XRD pattern of STO/Rh (3%) was totally consistent with the standard pattern of cubic perovskite-structured STO (JCPDS no. 00-035-0734, space group: Pm 3 m ) . X-ray photoelectron spectroscopy (XPS) was performed for STO/Rh (3%) surface analysis.…”

“…00-035-0734, space group: Pm3m). 28 X-ray photoelectron spectroscopy (XPS) was performed for STO/Rh (3%) surface analysis. The peaks of the Rh 3d, Ti 2p, Sr 3d, and O 1s were observed at 309.74, 458.14, 113.62, and 529.95 eV, respectively.…”