Construction of MoO3 nanopaticles /g-C3N4 nanosheets 0D/2D heterojuntion photocatalysts for enhanced photocatalytic degradation of antibiotic pollutant. (November 2021)

• Record Type: Journal Article
• Authors: Liu, Lishuo; Huang, Jinhui; Yu, Hanbo; Wan, Jia; Liu, Lianyu; Yi, Kaixin; Zhang, Wei; Zhang, Chenyu
• Is Part Of: Chemosphere. Volume 282(2021)
• Publication Date: 2021-11
• Subjects: 0D/2D -- Z-scheme -- MoO3/g-C3N4 photocatalysts -- Tetracycline -- Sunlight; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.131049
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: A new type of 0D-2D Z-scheme heterojunction photocatalyst (MoO3 /g-C3 N4 ) was successfully prepared via simple hydrothermal calcination method. The catalytic activities of MoO3 /g-C3 N4 was evaluated by the degradation effect of tetracycline. The results indicated that the 0D-2D MoO3 /g-C3 N4 Z-scheme heterojunction was significantly better than that of original g-C3 N4 . Especially, the optimal 0.5 wt% MoO3 /g-C3 N4 could reach 85.9% removal efficiency within 100 min under visible light irradiation (λ > 420 nm), and its degradation rate constant was 2.3 times higher than that of g-C3 N4 ·In addition, the effects of real water matrix, natural sunlight irradiation on tetracycline removal were examined. Reactive-species-trapping experiments show that both photo-generated O2 − and h + are the main active species in the photocatalytic process. Besides, the results of O2 − and OH detection further indicated that the yield amount of O2 − and OH in MoO3 /g-C3 N4 case showed enhancement when compared with g-C3 N4 . Moreover, the quite stable crystal structure and excellent recycling ability endowed the MoO3 /g-C3 N4 composite with a great potential for applying in photocatalytic fields. Graphical abstract: Image 1 Highlights: 0D /2D MOCN is well prepared by simple calcination synthesis method. The removal rate of tetracycline by 0D/2D MOCN is higher than that of CNNS. 0D /2D MOCN possess remarkable stability and reusability. Constructing 0D/2D Z-scheme MOCN improves the photoinduced charge separation of CNNS.