Sodium‐Doped C3N4/MOF Heterojunction Composites with Tunable Band Structures for Photocatalysis: Interplay between Light Harvesting and Electron Transfer

• Published in: Chemistry : a European journal Vol. 24; no. 69; pp. 18403 - 18407
• Main Authors: Pan, Yating, Li, Dandan, Jiang, Hai‐Long
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 10.12.2018
• Subjects: Carbon nitride; Chemistry; Composite materials; Electron transfer; g-C3N4; Heterojunctions; Hydrogen production; light harvesting; metal-organic frameworks; Photocatalysis; Sodium
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201803555

The search for ideal model systems to investigate the role of different parameters in heterojunction composites for enhanced photocatalysis is a high‐priority target. Herein, a series of heterojunction composites, namely Nax‐C3N4/Pt@UiO‐66, being composed of UiO‐66 and Na‐doped g‐C3N4 with adjustable light absorbance and band structures, have been prepared with different Na contents, which exhibit a volcano curve towards photocatalytic H2 production. Benefiting from the interplay of the two critical factors between light harvesting ability and electron transfer efficiency, the optimized Na0.02‐C3N4/Pt@UiO‐66 shows excellent photocatalytic H2 production, far surpassing its corresponding single counterparts. The heterojunction composites, Nax‐C3N4/Pt@MOF, have been fabricated for photocatalytic H2 production. The optimized activity can be achieved by rationally tuning the light harvesting and band structures of Nax‐C3N4. The results indicate that light response and electron transfer are key factors in heterojunction composites for photocatalysis.