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Uranium-containing nuclear wastewater poses a significant environmental and health challenge. This study addresses this issue by synthesizing phosphorus-doped ultra-thin carbon nitride (UL-CNP) photocatalysts through thermal exfoliation and pressurized thermal evaporation. UL-CNP demonstrates exceptional photocatalytic performance for the reduction of hexavalent uranium (U(VI)), achieving an 82% reduction efficiency without a sacrificial agent, surpassing unmodified bulk and layered carbon nitrides by 5.24 and 5.35 times, respectively. The enhanced performance is attributed to increased specific surface area, improved charge transfer kinetics, and effective charge distribution regulation resulting from phosphorus doping. Additionally, UL-CNP exhibits excellent stability and durability, maintaining high uranium removal efficiency after multiple cycles. This research offers a promising avenue for developing efficient and sustainable uranium wastewater treatment technologies.

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Synthesis of Novel Phosphorus-Doped Carbonitride Photocatalyst and Its Application for Uranium Removal

  • 会议论文

  • 发表日期：

    2026年

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  • Yonglin Li,
  • Siman Mao,
  • Xingfu Cai,
  • Sufen Li,
  • Yonggang Huo

摘要

Uranium-containing nuclear wastewater poses a significant environmental and health challenge. This study addresses this issue by synthesizing phosphorus-doped ultra-thin carbon nitride (UL-CNP) photocatalysts through thermal exfoliation and pressurized thermal evaporation. UL-CNP demonstrates exceptional photocatalytic performance for the reduction of hexavalent uranium (U(VI)), achieving an 82% reduction efficiency without a sacrificial agent, surpassing unmodified bulk and layered carbon nitrides by 5.24 and 5.35 times, respectively. The enhanced performance is attributed to increased specific surface area, improved charge transfer kinetics, and effective charge distribution regulation resulting from phosphorus doping. Additionally, UL-CNP exhibits excellent stability and durability, maintaining high uranium removal efficiency after multiple cycles. This research offers a promising avenue for developing efficient and sustainable uranium wastewater treatment technologies.