Construction of NiCo-LDH/g-C3N4 heterojunctions as efficient photocatalysts for enhanced degradation of tetracycline hydrochloride and hydrogen evolution. (21st November 2022)

• Record Type: Journal Article
• Authors: Nong, Jiajun; Jin, Yuexiang; Tan, Jun; Ma, Hongxia; Lian, Yuan
• Is Part Of: New journal of chemistry. Volume 46:Number 47(2022)
• Page Start: 22830
• Page End: 22840
• Publication Date: 2022-11-21
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj04171e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The schematic diagram of the charge transfer path of an LDH/CN nanocomposite for photocatalytic degradation of TC and photocatalytic hydrogen evolution. Abstract : Realizing highly efficient utilization of solar energy for solving problems of environmental pollution and energy shortage has attracted increasing attention. Herein, Z-scheme two-dimensional (2D)/2D NiCo-LDH/g-C3 N4 (LDH/CN) heterojunction composites were synthesized, which showed enhanced photocatalytic performance for tetracycline hydrochloride (TC) degradation and hydrogen (H2 ) generation under visible light irradiation. A 2D/2D heterojunction structure was formed between NiCo-LDH nanosheets (LDH) and g-C3 N4 (CN), which was beneficial for the effective separation of photogenerated charge carriers. The active species of hydroxyl (˙OH), superoxide (˙O2 − ) and hole (h + ) radicals contributed to TC photodegradation. The optimum photocatalyst showed a remarkably enhanced photocatalytic capability with a hydrogen generation rate of 451.7 μmol g −1 h −1 . The improved photocatalytic activities may be attributed to the synergistic effects of the increased absorption of visible light, the separation efficiency of carriers and the 2D/2D heterostructure. A Z-scheme photocatalytic mechanism was proposed for the LDH/CN composite, showing dual advantages of a high redox ability and efficient charge carrier separation.