Construction of Bi2O2(OH)Cl/Bi/Bi2O3 Heterojunction with Enhanced Photocatalytic H2O2 Production Performance
GAO Meichao
SUN Zhaonan
GONG Yunyun
YU Guanglong
FENG Yuanyuan
Abstract：A new S-type heterojunction catalyst Bi2O2(OH)Cl/Bi/Bi2O3 was prepared by combustion and hydrothermal methods.The samples were characterized by X-ray powder diffractometer,scanning electron microscopy,X-ray photoelectron spectroscopy and UV visible diffuse reflectance spectra.The photocata-lytic synthesis of H2O2 for the sasmples was investigated by photocatalytic experiments and photoelectro-chemical tests,and the photocatalytic reaction mechanism was speculated.The results show that the con-tent of Bi2O2(OH)Cl increases with the increase of synthesis temperature,and the composite Bi2O2(OH)Cl/Bi/Bi2O3 exhibits the best photocatalytic activity when the hydrothermal temperature is 120℃.The H2O2 production rate under simulated sunlight irradiation is up to 571.43 μmol·h-1·g-1,which is 47.8 and 3.6 times of Bi/Bi2O3 and Bi2O2(OH)Cl,respectively.Its high photocatalytic performance can be attribu-ted to the formation of interfacial electric field of heterojunction in the composite,which improves the separation efficiency of photogenerated electron-hole.Radical quenching experiments show that the main active species of photocatalyzed H2O2 for Bi2O2(OH)Cl/Bi/Bi2O3 are superoxide free radicals and singlet oxygen.
Keywords：Bi2O2(OH)Cl/Bi/Bi2O3heterojunctionphotocatalysisH2O2
Publication Date：2024-12-28
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：10( 39-48 )