TY - JOUR
T1 - Enhanced photocatalytic activity of ternary Ag/g-C3N4/NaTaO3 photocatalysts under wide spectrum light radiation: The high potential band protection mechanism
AU - Tang, Lin
AU - Feng, Chengyang
AU - Deng, Yaocheng
AU - Zeng, Guangming
AU - Wang, Jiajia
AU - Liu, Yani
AU - Feng, Haopeng
AU - Wang, Jingjing
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-23
PY - 2018/8/15
Y1 - 2018/8/15
N2 - Constructing heterojunction photocatalyst is an effective method to enhance the separation of photogenerated electron and hole and benefit the wide-bandgap photocatalyst with significant visible light response ability. In this study, a novel and highly efficient ternary photocatalyst was prepared by depositing Ag nanoparticles on the surface of graphitic carbon nitride nanosheets (g-C3N4)/NaTaO3 nanohybrid. It showed an enhanced photocatalytic degradation of tetracycline (TC), rhodamine B (RhB) and phenol under wide-spectrum light irradiation. Compared to pure NaTaO3, g-C3N4 and binary g-C3N4/NaTaO3, Ag/g-C3N4/NaTaO3 displayed enhanced photodegradation efficiency with 95.47% removal of TC (20 mg/L) in 60 min under visible light irradiation. From the free radical quenching experiment and ESR characterization results, the charge transfer process can be identified as a Z-scheme transfer mechanism, which can significantly enhance the charge separation rate and protect the high potential valence band (VB) of NaTaO3 and conduction band (CB) of g-C3N4. This work provides a new promising approach for designing novel Z-scheme photocatalysts.
AB - Constructing heterojunction photocatalyst is an effective method to enhance the separation of photogenerated electron and hole and benefit the wide-bandgap photocatalyst with significant visible light response ability. In this study, a novel and highly efficient ternary photocatalyst was prepared by depositing Ag nanoparticles on the surface of graphitic carbon nitride nanosheets (g-C3N4)/NaTaO3 nanohybrid. It showed an enhanced photocatalytic degradation of tetracycline (TC), rhodamine B (RhB) and phenol under wide-spectrum light irradiation. Compared to pure NaTaO3, g-C3N4 and binary g-C3N4/NaTaO3, Ag/g-C3N4/NaTaO3 displayed enhanced photodegradation efficiency with 95.47% removal of TC (20 mg/L) in 60 min under visible light irradiation. From the free radical quenching experiment and ESR characterization results, the charge transfer process can be identified as a Z-scheme transfer mechanism, which can significantly enhance the charge separation rate and protect the high potential valence band (VB) of NaTaO3 and conduction band (CB) of g-C3N4. This work provides a new promising approach for designing novel Z-scheme photocatalysts.
UR - https://linkinghub.elsevier.com/retrieve/pii/S0926337318301437
UR - http://www.scopus.com/inward/record.url?scp=85042678674&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2018.02.031
DO - 10.1016/j.apcatb.2018.02.031
M3 - Article
SN - 0926-3373
VL - 230
SP - 102
EP - 114
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -