Photochemical Construction of Carbonitride Structures for Red‐Light Redox Catalysis

Abstract

Metal‐free carbonitride(CN) semiconductors are appealing light‐transducers for photocatalytic redox reactions owing to the unique band gap and stability. To harness solar energy efficiently, CN catalysts that are active over a wider range of the visible spectrum are desired. Now a photochemical approach has been used to prepare a new‐type triazine‐based CN structure. The obtained CN shows extraordinary light‐harvesting characteristics, with suitable semiconductor‐redox potentials. The light absorption edge of the CN reaches up to 735 nm, which is significantly longer than that of the conventional CN semiconductor at about 460 nm. As expected, the CN can efficiently catalyze oxidation of alcohols and reduction of CO2 with visible light, even under red‐light irradiation. The results represent an important step toward the development of red‐light‐responsive triazine‐based structures for solar applications.

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi2S3 nanorods

“…[15][16][17][18][19] For instance, Li et al explored a metal-organic framework composite, which has efficient photocatalytic hydrogen production ability owing to its broader spectralr esponsivity (from UV to NIR). [18] However,a sapromising approach to address energy shortage issues, studies on the synthesis and characterization of NIR-driven photocatalysts are still limited. [18] However,a sapromising approach to address energy shortage issues, studies on the synthesis and characterization of NIR-driven photocatalysts are still limited.…”

“…As near-infrared( NIR) light constitutes about 50 %o ft he solars pectrum,m ore andm ore efforts have been devotedtoidentifying NIR-responsive photocatalysts in recent years. [15][16][17][18][19] For instance, Li et al explored a metal-organic framework composite, which has efficient photocatalytic hydrogen production ability owing to its broader spectralr esponsivity (from UV to NIR). [15] Yang et al constructed carbonitride structures that can reduce CO 2 even under red light irradiation.…”

“…[15] Yang et al constructed carbonitride structures that can reduce CO 2 even under red light irradiation. [18] However,a sapromising approach to address energy shortage issues, studies on the synthesis and characterization of NIR-driven photocatalysts are still limited. Therefore, it is highly desirable to develop photocatalysts with broader solar spectralr esponse (e.g.,U Vt oN IR region) to fully utilize the energy of sunlight.…”

Smart Solar–Metal–Air Batteries Based on BiOCl Photocorrosion for Monolithic Solar Energy Conversion and Storage

“…Semiconductor catalysts with appropriate energy band positions are required to supply proper oxidation-reduction potential during the photocatalytic process. [8,9] The majority of narrow-bandgap photocatalysts with suitable band positions are unstable under illumination, such as CdS, CdSe, and Cu 2 O, [10a-c] due to their easy self-redox process, which is known as a photocorrosion, while photocatalysts are typically reduced using the light and cannot self-oxidize. Rarely, the photo-generated holes of photocorrosive materials such as cuprous oxide and bismuth oxide oxidize or reduce themselves under illumination.…”

Photocatalytic Air Purification Using Functional Polymeric Carbon Nitrides

“…[ 67 , 89 ] 3) The redshift of light absorption of the PCN can provide more chances to absorb photons and participate in the visible‐light‐driven heterogeneous catalysis of air purification. [ 90 , 91 , 92 , 93 ] 4) The high physicochemical/mechanical/chemical/thermal stabilities (attributed to its aromatic C–N heterocycles) of the PCNs reduce the inactivation and photo corrosion, thereby extending the life of the photocatalysts. [ 94 , 95 , 96 , 97 , 98 ] 5) A similar layered structure with graphite for PCN provides a large reaction space, improves gas absorption/desorption, and shortens the transmission distance of photogenerated charges.…”