Synthesis of g-C3N4@Fe-UiO-66-NH2 composite photocatalyst for persulfate-assisted degradation of 2,4,6-trinitroresorcinol under visible-light irradiation

Authors

  • Nguyen Trung Dung
  • Tran Quang Dat
  • Nguyen Thi Van Anh
  • Do Tuyet Nhung
  • Nguyen Thi Thu Hoa
  • Le Hai Dang
  • Hoang Thi Ngoc Anh
  • Dao Minh Hoang

DOI:

https://doi.org/10.62239/jca.2026.031

Abstract

This study reports the synthesis of a g-C₃N₄@Fe-UiO-66-NH₂ (CN@FU) composite photocatalyst for persulfate-assisted degradation of 2,4,6-trinitroresorcinol (TNR) under visible-light irradiation. The composite was successfully fabricated from g-C₃N₄ and Fe-UiO-66-NH₂, and its structural, morphological, textural, optical, and charge-transfer properties were confirmed by XRD, FTIR, SEM–EDX, BET, UV–Vis DRS, and PL analyses. The CN@FU composite exhibited enhanced visible-light absorption, suppressed electron–hole recombination, and a mesoporous structure with a high specific surface area, providing favorable conditions for pollutant adsorption and persulfate activation. Under optimized conditions, the CN@FU/Na₂S₂O₈/visible-light system achieved 91.45% TNR removal within 120 min. Quenching experiments revealed that multiple reactive species were involved in the degradation process, with singlet oxygen (¹O₂) playing the dominant role, while O2·-,  SO4·-/·OH, and h⁺ also contributed. These findings demonstrate that CN@FU is an efficient visible-light-driven photocatalyst for persulfate activation and holds great potential for the treatment of TNR-contaminated wastewater.

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Published

30-06-2026

Issue

Vol. 15 No. 2 (2026): June

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