Siyi Li, Meng Zhang, Zhiyu Liu, Congcong Piao, Shuguang Li, Jun Wang
College of Chemistry, Liaoning University
Zhihui Qu, Xin Cui, Youtao Song
College of Environment, Liaoning University
Graphical Abstract
In this work, a novel Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalyst is got by photo-assisted isoelectric point way. The Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) system greatly enhances photocatalytic performance on degradation of LEV with simultaneous hydrogen production.
Abstract
The capacity of redox and the separation efficiency of electron-hole pairs are important indexes for evaluating the performance of photocatalyst. Herein, a novel Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalyst is prepared by photo-assisted isoelectric point way. The prepared samples are characterized by XRD, SEM, TEM, EDS mappings, XPS, UV–vis, PL, TPR and EIS. The Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalytic system exposes the Ag3PO4 (1 1 0) crystal plane with strong oxidizing ability and provides a large producing hydrogen
reduction surface of g-C3N4 at the same time. Therefore, the photocatalytic degradation of levofloxacin (LEV) with simultaneous hydrogen production can be effectively achieved under visible light irradiation. Besides, the influence factors such as visible light irradiation time, sacrificial agents, Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0)
photocatalyst dosage, initial pH and used times are studied systemically. Based on trapping tests and ESR analyzes, the mainly active species are confirmed in the photocatalytic degradation of LEV. Finally, the photocatalytic reaction mechanism on degradation of organic pollutants with simultaneous production hydrogen caused by Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalyst is proposed.
Read the article here:
63-Fabrication of highly active Z-scheme Agg-C3N4-Ag-Ag3PO4 (110) photocatalyst photocatalyst for visible light photocatalytic degradation of levofloxacin with simultaneous hydrogen production.pdf
