Ag2S nanoparticles anchored on P-doped g-C3N4: a novel 0D/2D p-n 2 heterojunction for superior photocatalytic inactivation of 3 multidrug-resistant E. coli. (1st September 2022)

• Record Type: Journal Article
• Authors: Yan, Wanshu; Hu, Pingping; Jiang, Yiguo; Xu, Xiuquan; Ma, Xianfeng; Wang, Mengru; Bao, Xinyue
• Is Part Of: Materials research express. Volume 9:Number 9(2022)
• Publication Date: 2022-09-01
• Subjects: g-C3N4 -- P-doped -- Ag2S -- p-n heterojunction -- photocatalytic inactivation; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac8b66
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Photocatalytic inactivation has been proved to be an effective strategy to eliminate pathogenic bacteria in water. Herein, a novel 0D/2D p-n heterojunction of Ag2 S-anchored P-doped g-C3 N4 (Ag2 S/PCN) were constructed by a simple two-step process coupling one-pot calcination and ultrasonic-assisted synthesis. The photocatalytic performance of as-prepared Ag2 S/PCN composites was investigated by inactivating multidrug-resistant E. coli under visible light irradiation. The results indicated that Ag2 S/PCN-5 possessed outstanding photocatalytic inactivation activity and superior stability, which could completely inactivate 7.0 log E. coli cells within 60 min. The enhanced photocatalytic activity of Ag2 S/PCN-5 was mainly attributed to the elevated visible-light response and improved production and transfer of photoexcited charges. In addition, the free radicals trapping experiments results revealed that h + and O2 − were predominantly responsible for the efficient inactivation activity. Finally, according to the 0D/2D structure and energy band configuration analysis, the enhanced p-n type heterojunction photocatalytic inactivation mechanism of Ag2 S/PCN was discussed in detail.