Construction of Ag decorated P-doped g-C3N4 nanosheets Schottky junction via silver mirror reaction for enhanced photocatalytic activities. (1st January 2022)

• Record Type: Journal Article
• Authors: Chen, Yufang; Ren, Xinghui; Wang, Xuefei; Tian, Zhen; Yang, Xi; Lu, Jinwei; Bai, Haoyang; Jiao, Tifeng; Huang, Hao; Hu, Jie
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 1(2022)
• Page Start: 250
• Page End: 263
• Publication Date: 2022-01-01
• Subjects: Photocatalysis -- G-C3N4 nanosheets -- Phosphorous doping -- Silver decoration -- Schottky junction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.10.024
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The construction of highly efficient hybrid structure photocatalysts for hydrogen evolution and photocatalytic decomposition is considered an excellent choice for clean energy production and environmental remediation. Herein, Ag decorated P-doped g-C3 N4 nanosheets (Ag-(P/CNNS)) Schottky junction was successfully constructed via a two-step calcination process and silver mirror reaction. The visible-light photocatalytic activities for hydrogen evolution from water splitting and degradation of Rhodamine B (RhB) over Ag-(P/CNNS) are distinctly enhanced, which is 5.3 and 1.6 times that of bulk g-C3 N4 (BCN), respectively. The significantly improved performance is attributed to the synergistic effect, including lamellar configuration of g-C3 N4 nanosheets (CNNS), the substitution of partial C atoms by P, the plasma resonance effect (SPR) of metal Ag and the Schottky junction between Ag and P/CNNS. This work proposes a simple approach to design and develop g-C3 N4 based materials. Graphical abstract: The Schottky junction Ag-(P/CNNS) photocatalyst not only broadens the visible light response range, but also accelerates the separation and transfer of photogenerated carriers through a tight interface, and has good stability. Image 1 Highlights: Ag decorated P-doped g-C3 N4 nanosheets was prepared by silver mirror reaction. 2D ultra-thin structure shortens the migration distance of photogenerated carriers. Enhanced photocatalytic activities by partially replaced C atom with P in g-C3 N4 . Formation of Schottky junction account for the superior charge separation.