Nitrogen vacancies and metal-free group intercalation on carbon nitride for super photocatalytic performance. (1st June 2022)

• Record Type: Journal Article
• Authors: Wu, Guangyu; Liu, Chaoke; Shao, Weifan; Wang, Yun; Zhang, Yichi; Chen, Yuwen; Zhang, Ziran; Han, Jiangang; Xing, Weinan
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 47(2022)
• Page Start: 20540
• Page End: 20545
• Publication Date: 2022-06-01
• Subjects: Nitrogen vacancies -- Metal-free group-intercalated g-C3N4 -- Photocatalyst -- Dye degradation -- Hydrogen evolution; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.04.117
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Here, a dual regulation strategy to construct nitrogen vacancies-modified and metal-free group-intercalated g-C3 N4 (NP–CN) photocatalyst is proposed. The nitrogen vacancies in the planes of NP-CN could adjust the band-gap of CN, while the metal-free group intercalated between layers act as electron transport channels for fast charge carrier separation. The nitrogen vacancies as well as metal-free group intercalate significantly increase the photocatalytic performance in H2 evolution and dye degradation. The photocatalytic H2 evolution rate and apparent first-order rate constant for RhB removal of NP-CN24 is 22 and 7.3 times higher than that CN, respectively. This work provides a facile approach to design and synthesize new modification of CN photocatalyst via nitrogen vacancies and metal-free group intercalation to simultaneously improve the activity in the photocatalytic application field. Highlights: Nitrogen vacancies-modified and metal-free group-intercalated g-C3 N4 (NP–CN) is prepared. NP-CN shows high activity and stability in photocatalytic H2 evolution and dye degradation. The photocatalytic H2 evolution activity of NP-CN is 22 time that of the pristine g-C3 N4 .