A novel g-C3N4 nanosheet/Ag3PO4/α-Bi2O3 ternary dual Z-scheme heterojunction with increased light absorption and expanded specific surface area for efficient photocatalytic removal of TC. Issue 20 (12th May 2022)

• Record Type: Journal Article
• Authors: Zhang, Zongyu; Xue, Xiuling; Chen, Xiaoyi
• Is Part Of: Dalton transactions. Volume 51:Issue 20(2022)
• Page Start: 8015
• Page End: 8027
• Publication Date: 2022-05-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt00737a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A novel ternary dual Z-scheme photocatalyst g-C3 N4 nanosheet/Ag3 PO4 /α-Bi2 O3 was designed via an in situ deposition and hydrothermal–calcination method with an excellent photocatalytic performance toward TC degradation. Abstract : A novel ternary dual Z-scheme 2D g-C3 N4 nanosheet/Ag3 PO4 /α-Bi2 O3 (CNN/AP/BO) photocatalyst was successfully synthesized by an in situ deposition and hydrothermal–calcination method. The coupling of AP and BO remarkably enhanced the photocatalytic tetracycline (TC) degradation under visible light illumination, with an optimal removal efficiency of 91.6% (60 min), which can be attributed to the extended visible-light absorption and increased specific surface area owing to the interfacial intimate coupling with well-matched energy band positions between semiconductors. The improved photocatalytic activity resulted from the abundant free radicals by the order of ˙O2 − > h + > ˙OH based on the electron spin resonance (ESR) and quenching experiment results. In addition, the possible mechanism of TC degradation over the ternary dual Z-scheme heterojunction CNN/AP/BO was proposed.