0D/2D Ag3PO4/biotite nanocomposites for efficient visible-light-driven tetracycline hydrochloride degradation. (1st November 2022)

• Record Type: Journal Article
• Authors: Hua, Yuxiang; Liu, Xueqin; Li, Pengfei; Hu, Chenyao; Chen, Shenming; Liu, Xiaoheng
• Is Part Of: Materials science in semiconductor processing. Volume 150(2022)
• Publication Date: 2022-11-01
• Subjects: Biotite -- Ag3PO4 -- Photocatalytic -- Tetracycline hydrochloride degradation; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2022.106903
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Environmental problems caused by wastewater that contains antibiotics have attracted wide attention. Photocatalysis is a green and environmental friendliness method for dealing with environmental pollution. In this work, Ag3 PO4 /biotite composite photocatalysts were constructed by a room-temperature precipitation route. The two-dimensional biotite was used as a supporting matrix and dispersant for depositing size-tunable Ag3 PO4 nanoparticles. The intrinsic physical and photoelectrochemical properties of the as-prepared Ag3 PO4 /biotite heterostructures were systematically characterized. The photocatalytic activity of the constructed catalysts was assessed by photocatalytic degradation of tetracycline hydrochloride (TCH). Compared with pure Ag3 PO4, the synthesized Ag3 PO4 /biotite nanocomposites exhibited improved catalytic activity. The apparent kinetics constant of the optimized sample is about 2.28 times as high as the Ag3 PO4, the improved photocatalytic activity can be attributed to the enlarged specific surface area as well as the efficient separation and transfer of the photoexcited charge carriers. Based on the XPS, active species trapping experiments and band edge position measurements, the possible Z-scheme photocatalytic mechanism was proposed. Graphical abstract: Image 1 Highlights: The biotite exhibited semiconductor properties after acid etching. Ag3 PO4 /biotite nanocomposites with size-tunable Ag3 PO4 loading on the biotite nanosheets was realized. The obtained Ag3 PO4 /biotite heterojunctions exhibit superior photocatalytic performance than pure Ag3 PO4 . A direct Z-scheme photocatalytic mechanism was proposed to illustrate the separation and transfer of the charge carriers.