Construction of DyVO4/nitrogen deficient g-C3N4 composite for enhanced visible-light photocatalytic activity for tetracycline degradation. (April 2020)

• Record Type: Journal Article
• Authors: Shu, Keke; Chen, Fangyan; Shi, Weilong; Guo, Feng; Tang, Yubin; Ren, Hongji; Li, Mingyang
• Is Part Of: Materials research bulletin. Volume 124(2020)
• Publication Date: 2020-04
• Subjects: DyVO4 -- Nitrogen deficient g-C3N4 -- Composite -- Photocatalyst -- Visible light; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2020.110766
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: DVO/CNx heterojunctions were successfully synthesized by a simple precipitation-calcination method. The prepared DVO/CNx heterojunctions showed enhanced photocatalytic degradation performance of TC. This work expands the application of defective CN in composite photocatalysts. Abstract: The defects engineering takes effects on regulating the electronic structure to enhance the optical absorption, and acting as the capture centers of charge carriers to hinder the recombination of electron hole pairs. In this work, DyVO4 /nitrogen deficient g-C3 N4 (DVO/CNx) composite photocatalysts were successfully synthesized by a simple precipitation-calcination method, which showed excellent visible-light photocatalytic activity for the degradation of tetracycline (TC). Among them, 10 % DVO/CNx (with the mass ratio of 10 % DVO in the composites) exhibited the optimum photocatalytic performance (within 1 h, 92 % degradation of TC), which was higher than pure phase materials (CN, CNx and DVO) and DVO/CN heterojunction photocatalyst. The dramatically enhanced photocatalytic activity of DVO/CNx composite can be ascribed to its defect structure and the construction of heterojunction, which can simultaneously improve the visible-light absorption and separation efficiency of photo-generated electron-hole pairs. More importantly, the DVO/CNx photocatalyst exhibits high stability and reusability.