Enhanced photocatalytic activity of ternary Ag/g-C3N4/NaTaO3 photocatalysts under wide spectrum light radiation: The high potential band protection mechanism

Lin Tang, Chengyang Feng, Yaocheng Deng, Guangming Zeng, Jiajia Wang, Yani Liu, Haopeng Feng, Jingjing Wang

Research output: Contribution to journalArticlepeer-review

228 Scopus citations

Abstract

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.
Original languageEnglish (US)
Pages (from-to)102-114
Number of pages13
JournalApplied Catalysis B: Environmental
Volume230
DOIs
StatePublished - Aug 15 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Environmental Science
  • Catalysis
  • Process Chemistry and Technology

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