An S-scheme heterojunction constructed from α-Fe₂O₃ and In-doped carbon nitride for high-efficiency CO₂ photoreduction

Abstract

The conversion of CO2 to chemicals and fuels by photocatalysis provides a promising strategy to solve both energy crisis and environmental impacts, for which the development of high-activity photocatalysts is...

An S-scheme α-Fe2O3/Cu2O photocatalyst for an enhanced primary amine oxidative coupling reaction under visible light

“…Hematite (α-Fe 2 O 3 ) is a typical narrow-band semiconductor, which can directly use most of the visible light in the solar spectrum for photocatalytic reactions. 23 Moreover, it is charac-terized by good corrosion stability, rich abundance, high economy and non-toxicity. Hence, it has been regarded as a promising visible photocatalyst.…”

Progress and Outlook of Surface Engineering Strategies in Photocatalytic Materials for Mercury Removal: A Review

“…Similar to the construction of vacancies, doping can reconfigure the original material local fields to create active sites, enhance reactant adsorption, and enrich carriers. 90 Doping engineering includes metal doping and nonmetal doping. Generally, it is the introduction of foreign atoms/ions into the interior of the base material using physical or chemical methods to create new charges within the crystal, form defects, and transform the lattice type.…”

“…Doping can be used either as one of the methods to construct vacancies or as a separate surface engineering strategy to improve the photocatalytic performance. Similar to the construction of vacancies, doping can reconfigure the original material local fields to create active sites, enhance reactant adsorption, and enrich carriers . Doping engineering includes metal doping and nonmetal doping.…”

Bi2WO6/C3N4 S-Scheme Heterojunction with a Built-In Electric Field for Photocatalytic CO2 Reduction

“…The 2D CN nanosheets could shorten the charge diffusion length and enlarge the specific surface area, which effectively inhibit the bulk recombination of photoinduced charge carriers, thereby facilitating the CO 2 reduction reaction. − In addition to the nanostructure design, the construction of a step-scheme (S-scheme) heterojunction is another promising approach for the kinetic control of photogenerated charges. − The unique interfacial charge-transfer mechanism within the S-scheme would simultaneously enhance the efficiency of charge separation and preserve the maximal redox ability of two components. To date, some CN-based S-scheme heterojunctions have been fabricated and have exhibited improved photoactivity for CO 2 reduction with water. − For instance, Qaraah et al synthesized a hierarchical O-doped g-C 3 N 4 /N-doped Nb 2 O 5 S-scheme photocatalyst, which showed approximately 6-fold higher CO 2 conversion rates than that of its individual counterpart . Ye group reported a C 3 N 4 (NH)/COF S-scheme heterojunction through an evaporation-induced self-assembly method, which exhibited greatly improved photocatalytic CO generation rate .…”