Molten salt synthesis of a highly crystalline graphitic carbon nitride homojunction from a deep eutectic solvent for selective photocatalytic oxidation

Abstract

Construction of homojunctions in graphitic carbon nitride is regarded as an efficient approach to improve the charge separation and photocatalytic activity. However, the enhanced activity is still far from satisfactory...

Deep eutectic solvents as an emerging green platform for the synthesis of functional materials

“…CN2U1AT has a higher specific surface area and better photocatalytic active sites in the photocatalytic field. Also in the field of photocatalysis, Chen et al 169 designed a DES composed of NH 4 SCN and urea as precursors and synthesized highly crystalline graphitic carbon nitride (CN) homojunctions using NaCl/KCl as the melting medium. The homogeneous structure can effectively inhibit charge recombination and promote charge movement at the interface, which can stably increase light activity.…”

All-in-one ultrathin nanoporous ZnIn2S4 with ameliorated photoredox capability: harvesting electron–hole pairs in cooperative hydrogen and benzaldehyde production

“…TEMPO) 14,15 and organic solvents ( e.g. acetonitrile and benzotrifluoride) 16–18 makes the system more complicated and thus produces unwanted hazardous waste at the end of the reactions. In light of this, an eco-friendly catalytic system using an all-in-one noble-metal-free photocatalyst is required to utilize both photoinduced electrons and holes in the redox coupling reaction to simultaneously produce high-energy-density fuels and value-added chemical products.…”

Order–Disorder Engineering of Carbon Nitride for Photocatalytic H2O2 Generation Coupled with Pollutant Removal

“…For instance, a well-ordered highly crystalline carbon nitride (CCN) nanoarray with a conjugated electron donor–acceptor structure was designed by Li et al for promoted photocatalytic H 2 O 2 generation, in which accelerated charge transfer and reduced reaction barrier were achieved. Nevertheless, deficient defects in the crystal structure of carbon nitride lead to poor adsorption capacity of reactants, which seems to be an unavoidable drawback in the practical application of crystalline carbon nitride. , Distinct from the crystalline phase, the amorphous counterpart displays a large number of randomly oriented and unsaturated coordination bonds, which promote the reactant adsorption . However, the amorphous phase with a low electric conductivity suffers from sluggish charge transfer kinetics between the catalytic sites and the adsorbates, which restrict the development of amorphous carbon nitride (ACN). , Additionally, it should be noted that the static internal electric field (IEF) is a physical field inherent to the carbon-nitride-based photocatalyst that acts as a pump to accelerate carrier migration.…”

“…Nevertheless, deficient defects in the crystal structure of carbon nitride lead to poor adsorption capacity of reactants, which seems to be an unavoidable drawback in the practical application of crystalline carbon nitride. 29,30 Distinct from the crystalline phase, the amorphous counterpart displays a large number of randomly oriented and unsaturated coordination bonds, which promote the reactant adsorption. 31 However, the amorphous phase with a low electric conductivity suffers from sluggish charge transfer kinetics between the catalytic sites and the adsorbates, which restrict the development of amorphous carbon nitride (ACN).…”