A novel nonmetal intercalated high crystalline g-C3N4 photocatalyst for efficiency enhanced H2 evolution. (15th March 2022)

• Record Type: Journal Article
• Authors: Hu, Meng; Shu, Jianhua; Xu, Longjun; Liu, Chenglun; Feng, Qi
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 23(2022)
• Page Start: 11841
• Page End: 11852
• Publication Date: 2022-03-15
• Subjects: Graphitic carbon nitride -- Nonmetal intercalated high crystalline -- Photocatalyst -- H2 production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.01.227
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Introducing nickel foam as assistant, a novel nonmetal intercalated high crystalline graphitic carbon nitride (g-C3 N4 ) catalyst was successfully fabricated by β-cyclodextrin (β-CD) pretreated melamine with one step thermal polymerization process. The final results show that 0.3-NCCN presented a remarkably visible-light (λ > 400 nm) photocatalytic H2 evolution reaching 9297 μmol g −1 h −1, and the reaction process follows the zero-order kinetic model. The increase in crystallization of 0.3-NCCN implies a higher-ordered arrangement of tris-s-triazine. The nonmetal interlayer formed by oxygen-contained graphitized carbon can extend the π-conjugated system. Both above significantly benefit the rapid migration and separation of charge-carrier. Moreover, the narrowed band gap provides a stronger thermodynamic driving force for improving the photocatalytic water splitting efficiency. Our work paved a new method to construct high performance photocatalyst for water splitting. Highlights: The g-C3 N4 nanosheets were synthesized by a feasible and time-saving method. The optimal sample showed a 13.2 times improved H2 production activity. The nonmetal interlayer can extend the light absorption to visible light. The increased crystalline can improve photogenerated charges separation efficiency.