Photocatalytic activity enhancement of carbon‐doped g‐C 3 N 4 by synthesis of nanocomposite with Ag 2 O and α‐Fe 2 O 3

• Published in: Journal of the Chinese Chemical Society (Taipei) 2021-11, Vol.68 (11), p.2118-2131
• Main Authors: Amani‐Ghadim, Ali Reza, Tarighati Sareshkeh, Abdolreza, Nozad Ashan, Narges, Mohseni‐Zonouz, Homa, Seyed Ahmadian, Seyed Masoud, Seyed Dorraji, Mir Saeed, Gholinejad, Mohammad, Bayat, Farzaneh
• Format: Article
• Language: English
• ISSN: 0009-4536; 2192-6549
• DOI: 10.1002/jccs.202100253

Carbon‐doped g‐C 3 N 4 (CGNS) nanocomposite with Ag 2 O and α‐Fe 2 O 3 has been synthesized to improve g‐C 3 N 4 photocatalytic activity. The prepared CGNS/Ag 2 O/α‐Fe 2 O 3 (GAF [with mass ratio 3:2:1]) nanocomposite exhibits the expanded visible‐light absorption region leading to the enhanced photocatalytic performance for Acid Red 14 (AR14) degradation. Besides, it is found that the recombination rate of the charge carriers effectively suppresses the nanocomposite. For a better understanding of the photocatalytic degradation mechanism, the reactions have been performed in the presence of different scavengers. The experiments indicate that superoxide anion radicals possess a more influential role in AR14 degradation in comparison with hydroxyl radicals and holes. The degradation efficiency has been decreased from 94.68 to 85.60 after five consecutive photocatalytic tests implying that the prepared nanocomposite is a stable photocatalyst. In the end, the kinetic study of AR14 degradation on nanocomposite with considering pseudo‐first‐order kinetics results in a nonlinear empirical kinetic model development for prediction of degradation efficiency of AR14 on nanocomposite.