Rapid and energy-efficient preparation of boron doped g-C3N4 with excellent performance in photocatalytic H2-evolution. (25th October 2018)

• Record Type: Journal Article
• Authors: Chen, Pengfei; Xing, Pingxing; Chen, Zhiqiang; Lin, Hongjun; He, Yiming
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 43(2018)
• Page Start: 19984
• Page End: 19989
• Publication Date: 2018-10-25
• Subjects: B-g-C3N4 -- Microwave heating method -- Photocatalytic H2-evolution -- Visible light; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.09.078
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Microwaving heating method, which shows significantly higher efficiency in synthesis time and energy utilization than conventional heating method, was firstly applied to synthesize boron doped g-C3 N4 (B-g-C3 N4 ). Results demonstrated that B-g-C3 N4 could be prepared in 35 min via the method. XRD and XPS analyses verified the successfully doping of B element into the structure of g-C3 N4 . The doped B improved the photoabsorption performance of g-C3 N4 . Meanwhile, it greatly hindered the annihilation of charge carriers, prolonging the lifetime of photogenerated electrons, and thereby resulting in the excellent photocatalytic activity. The optimal B-g-C3 N4 exhibited a H2 production rate of 1439 and 400 μmol g −1 h −1 under simulated sunlight and visible light irradiation, respectively. This values are about 2.4 times higher than that of pure g-C3 N4 . This study offered an energy-efficient and rapid way for the synthesis of external atom doped g-C3 N4 with high catalytic efficiency. Highlights: B-g-C3 N4 was synthesized in 35 min via microwave heating method. B-g-C3 N4 was prepared rapidly and energy efficiently. The H2 -evolution rate of B-g-C3 N4 is 2.5 times faster than g-C3 N4 . The origin of the high photoactivity of B-g-C3 N4 was discussed.