Synthesis of potassium-modified g-C3N4/LaFeO3 nanocomposites as efficient visible-light photocatalytic for indole degradation

• Published in: Optical materials 2024-04, Vol.150, p.115231, Article 115231
• Main Authors: Zhang, Lianke, Zhang, Ruidan, Zhang, Shuaishuai, Sun, Peng
• Format: Article
• Language: English
• Subjects: G-C3N4/LaFeO3; Heterojunction; K-modified; LaFeO3; Photocatalysis
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2024.115231

A composite photocatalyst KCN/LFO was synthesized using K-modified g-C3N4 (KCN) and LaFeO3 (LFO). The photocatalytic activity of the KCN/LFO was evaluated by degrading indole (heterocyclic organic compound). The KCN/LFO-10 (mass fraction of LaFeO3 with 10%) displayed the highest removal rate of indole. Indole was degraded to 97.366% after 60 min. The photocurrent and electrochemical impedance spectroscopy (EIS) results suggested that the close correlation between KCN and LaFeO3 can increasing the efficiency of photogenerated carrier separation. The capture experiment results demonstrated that ·O2− and ·OH is primary active substance, respectively. Moreover, the degradation efficiency of KCN/LFO-10 to indole remains stable at 87% after four successive experiments of indole photocatalytic degradation. This work presents an effective method for addressing the pollution caused by heterocyclic organic compound. •Synthesis and characterization of KCN/LaFeO3 composite materials.•High charge separation in g-C3N4 due to K modification.•97.366% photo degradation of indole by unique band structure of KCN/LaFeO3.•KCN/LaFeO3 demonstrated excellent stability.