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<p>A novel Cu<sub>2</sub>(NO<sub>3</sub>)(OH)<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> composite catalyst was proposed for the thermal decomposition of ammonium per-chlorate (AP) and the influence of g-C<sub>3</sub>N<sub>4</sub> type, including MCN, TCN, and UCN, respectively, derived from Melamine, Thiourea, and Urea, was systematically evaluated. Results demonstrated that the type of g-C<sub>3</sub>N<sub>4</sub> influenced the surface dispersion of active Cu species and the amount of residual carbon, oxy-functionalized groups, and C-NH/NH<sub>2</sub> groups in composite catalyst. Different from the formation of Cu<sup>+</sup> on the surface of MCN or/and TCN, higher loading active component changed the interaction of Cu<sub>2</sub>(NO<sub>3</sub>)(OH)<sub>3</sub> and UCN, and Cu-UCN<sub>0.5</sub> presented larger surface defects and delocalization π-bonds, thereby exhibited better catalytic activity than Cu-MCN<sub>1</sub> and Cu-TCN<sub>1</sub> catalysts. It reduced the high-temperature decomposition temperature (HTD) of AP by 107.9&#xa0;°C and enhanced the total heat release by 6.8 times. Finally, the thermal decomposition kinetics parameters of AP over Cu-UCN<sub>0.5</sub> catalyst was studied and the according decomposition mechanism was also proposed.</p> Graphical abstract <p></p>

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The thermal decomposition of ammonium per-chlorate over novel Cu2(NO3)(OH)3/g-C3N4 composite catalyst: Influence of carbon-nitride type

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Jilong Zhang,
  • Rong Fan,
  • Haoran Zhang,
  • Bin Yang,
  • Zhibo Xiong,
  • Zhiquan Shi,
  • Wei Lu

摘要

A novel Cu2(NO3)(OH)3/g-C3N4 composite catalyst was proposed for the thermal decomposition of ammonium per-chlorate (AP) and the influence of g-C3N4 type, including MCN, TCN, and UCN, respectively, derived from Melamine, Thiourea, and Urea, was systematically evaluated. Results demonstrated that the type of g-C3N4 influenced the surface dispersion of active Cu species and the amount of residual carbon, oxy-functionalized groups, and C-NH/NH2 groups in composite catalyst. Different from the formation of Cu+ on the surface of MCN or/and TCN, higher loading active component changed the interaction of Cu2(NO3)(OH)3 and UCN, and Cu-UCN0.5 presented larger surface defects and delocalization π-bonds, thereby exhibited better catalytic activity than Cu-MCN1 and Cu-TCN1 catalysts. It reduced the high-temperature decomposition temperature (HTD) of AP by 107.9 °C and enhanced the total heat release by 6.8 times. Finally, the thermal decomposition kinetics parameters of AP over Cu-UCN0.5 catalyst was studied and the according decomposition mechanism was also proposed.

Graphical abstract