Nitrogen-rich g-C3N4@AgPd Mott-Schottky heterojunction boosts photocatalytic hydrogen production from water and tandem reduction of NO3− and NO2

• Published in: Journal of colloid and interface science Vol. 581; pp. 619 - 626
• Main Authors: Liu, Xinyang, Liu, Hu, Wang, Yingjun, Yang, Weiwei, Yu, Yongsheng
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.01.2021
• Subjects: AgPd nanowires; Mott-Schottky heterojunction; Photocatalytic hydrogen production; Reduction of NO3; Tandem reaction; AgPd nanowires; Reduction of NO3; Photocatalytic hydrogen production; Tandem reaction; Mott-Schottky heterojunction
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2020.07.105

[Display omitted] Developing an effective photocatalytic denitrification technology for NO3− and NO2− in water is urgently needed. In this paper, we synthesized a nitrogen-rich g-C3N4, and in-situ grown AgPd nanowires (NWs) on the surface of nitrogen-rich g-C3N4 to build AgyPd10−y/g-CxN4 Mott-Schottky heterojunction. Compared with g-CxN4, AgyPd10−y/g-CxN4 exhibits the enhanced photocatalytic hydrogen production from water and tandem reduction of NO3− and NO2− without the addition of other hydrogen source under 365 nm irradiation. The catalytic activity and selectivity of AgyPd10−y/g-CxN4 were studied by combination of the nitrogen-rich g-C3N4 and the different component of AgyPd10−y nanowires (NWs). Among the AgyPd10−y/g-CxN4 catalyst, the Ag3Pd7/g-C1.95N4 catalyst exhibited the highest photocatalytic activity and selectivity for photocatalytic reduction of NO3− and NO2−, and the removal rate of NO3− and NO2− are 87.4% and 61.8% under 365 nm irradiation at 25 °C, respectively. The strategy opens a new way for making the photocatalytic hydrogen production in tandem with reduction of NO3− and NO2− in water, also extending it to remove metal ion.