S doped g-C3N5 for highly efficient photocatalytic H2O2 production and PPCPs degradation via directional transfer of electrons

• Published in: Journal of environmental chemical engineering Vol. 11; no. 6; p. 111491
• Main Authors: Wang, Wenjuan, Zhou, Nan, Li, Yakun, Zhu, Zhengqiaoruo, Chen, Xiguo, Zhang, Linlin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2023
• Subjects: G-C3N5; H2O2; PPCPs; S doping; PPCPs; S doping; G-C3N5; H2O2
• ISSN: 2213-3437
• DOI: 10.1016/j.jece.2023.111491

g-C3N5 exhibits thermodynamical stability and longer lifetime of photogenerated carriers, making it a subject of considerable interest and widespread utilization in various photocatalytic reactions. Herein, a novel S doped g-C3N5 photocatalyst achieved an impressive photocatalytic H2O2 production rate (3102.2 μM h−1), which is 95.45 times higher than that of g-C3N5. Furthermore, S doped g-C3N5 also has the ability to rapidly photocatalytic degrade SMX within 30 min. This significant enhancement is mainly attributed to the significant increase in oxygen adsorption capacity caused by S doping and the improvement of photogenerated charge carrier separation efficiency. In addition, photogenerated electrons can be directed and driven onto adsorbed O2 via S doping, which are effectively activated to form H2O2. These findings offer valuable insights into the design and synthesis of g-C3N5-based photocatalysts for efficient H2O2 production and degradation of pollutants. •S-C3N5 is synthesized by a facile thermal polymerization method.•S-C3N5 has a larger surface area with abundant oxygen adsorption sites.•S-C3N5 depicts superior SMX photodegradation and H2O2 production.•The e- occupies a vital position in the H2O2 production reaction.