Photocatalytic Overall Water Splitting by SrTiO3 with Surface Oxygen Vacancies

Abstract

Strontium Titanate has a typical perovskite structure with advantages of low cost and photochemical stability. However, the wide bandgap and rapid recombination of electrons and holes limited its application in photocatalysis. In this work, a SrTiO3 material with surface oxygen vacancies was synthesized via carbon reduction under a high temperature. It was successfully applied for photocatalytic overall water splitting to produce clean hydrogen energy under visible light irradiation without any sacrificial reagent for the first time. The photocatalytic overall water splitting ability of the as-prepared SrTiO3-C950 is attributed to the surface oxygen vacancies that can make suitable energy levels for visible light response, improving the separation and transfer efficiency of photogenerated carriers.

An Overview of Polymer-Supported Catalysts for Wastewater Treatment through Light-Driven Processes

“…SrTiO 3 has a typical perovskite structure with advantages of a low cost and excellent chemical stability [27]. It has been widely used as a photocatalyst for water splitting and mineralization; however, due to the wide BG, it can only utilize UV light during photocatalytic reactions [27,28] and it presents a rapid recombination of photogenerated carriers [28].…”

Carbonized propagation synthesis of porous CQDs–SrTiO3/graphene and its photocatalytic performance for removal of methylene blue

“…4e appeared at binding energies of 458.1 and 463.9 eV, while for CSG-5 they appeared at 457.9 and 463.6 eV, respectively. 34 Compared with SrTiO 3 , the Ti peak in CSG-5 shifted by 0.2–0.3 eV to the low binding energy direction, which was attributed to the combination of Ti and C. 35,36…”

Hydrogen evolution via noble metals based photocatalysts: A review

“…Strontium titanate-based materials are promising new materials used to produce hydrogen under visible light [87]. SrTiO3 has many advantages such as low cost and photochemical resistance [88]. Rh doped SrTiO3 has been investigated for hydrogen evolution [89].…”