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Booming of photocatalytic water splitting technology (PWST) opens a new avenue for the sustainable synthesis of high‐value‐added hydrogenated and oxidized fine chemicals, in which the design of efficient semiconductors for the in‐situ and synergistic utilization of photogenerated redox centers are key roles. Herein, a porous polymeric carbon nitride (PPCN) with a crystalline backbone was constructed for visible light‐induced photocatalytic hydrogen generation by photoexcited electrons, followed by in‐situ utilization for olefin hydrogenation. Simultaneously, various alcohols were selectively transformed to valuable aldehydes or ketones by photoexcited holes. The porosity of PPCN provided it with a large surface area and a short transfer path for photogenerated carriers from the bulk to the surface, and the crystalline structure facilitated photogenerated charge transfer and separation, thus enhancing the overall photocatalytic performance. High reactivity and selectivity, good functionality tolerance, and broad reaction scope were achieved by this concerted photocatalysis system. The results contribute to the development of highly efficient semiconductor photocatalysts and synergistic redox reaction systems based on PWST for high‐value‐added fine chemical production. [ABSTRACT FROM AUTHOR]

Structural modulation of graphitic carbon nitride (g‐C3N4) remains a major challenge in rational catalyst design for artificial photosynthesis of valuable chemicals. Herein, a cellulose nanofiber (CNF) assisted polymerization is utilized to prepare 1D holey g‐C3N4 nanorods (HCN) with nitrogen vacancies and oxygen dopants for photochemical synthesis of lactic acid via monosaccharide photooxidation. The HCN exhibits a remarkable yield of 75.5% for lactic acid from a wide assortment of sugars such as hexose (C5) to pentose (C6), together with an excellent hydrogen production rate of 2.8 mmol h−1 g−1. Mechanistic studies confirm the rapid generation of superoxide radical is responsible for the superior activity, enjoying the synergetic effect between nitrogen vacancies and oxygen dopants. This work provides new directions for the design of green and efficient photocatalysts for biomass upgrading. [ABSTRACT FROM AUTHOR]

Polymeric carbon nitrides (CNs) have been identified as attractive photocatalysts owing to their comparatively low cost and facile modification of their electronic structure. Herein, we report an effective strategy to tune the surface oxygen species linking site of polymeric CN, achieving more effective charge separation. A high photocatalytic hydrogen production rate of approximately 10225 μmol h−1 g−1 under visible light irradiation (λ>420 nm) and an impressive apparent quantum efficiency (AQE) of 5.7 % at 430 nm were recorded. Specifically, thermal treatment under a H2 and then an air atmosphere allowed the oxygen species linker on the surface of CN to be changed from −C=O to N=C−OH and then −C−O−C−, resulting in unbalanced charge distribution, which significantly enhanced the photogenerated charge separation, further contributing to the high hydrogen production performance. This linker regulation strategy may provide a new path for the development of highly efficient photocatalysts. [ABSTRACT FROM AUTHOR]

Mein Motto ist: Rette die Welt und diene der Gesellschaft'. 3 "Mesoporous Carbon Nitrides: Synthesis, Functionalization, and Applications": K. S. Lakhi, D.-H. Park, K. Al-Bahily, W. Cha, B. Viswanathan, J.-H. Choy, A. Vinu, Chem. Soc. 4 "Gold Nanoparticles Embedded in a Nanoporous Carbon Nitride Stabilizer for Highly Efficient Three-Component Coupling Reaction": K. K. R. Datta, B. V. Subba Reddy, K. Ariga, A. Vinu, Angew. [Extracted from the article]