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<p>The development of efficient and stable adsorbents for the removal of Rhodamine B (RhB) is of great significance in mitigating its environmental hazards. In this study, a nitrogen-doped carbon composite (Mn-MoO<sub>x</sub>@NC) was successfully synthesized via high-temperature annealing of [N(C<sub>4</sub>H<sub>9</sub>)<sub>4</sub>]<sub>3</sub>[MnMo<sub>6</sub>O<sub>18</sub>{(OCH<sub>2</sub>)<sub>3</sub>CNH<sub>2</sub>}<sub>2</sub>] (MnMo<sub>6</sub>) and dicyandiamide (DCA). The resulting material exhibited excellent adsorption performance, with a maximum adsorption capacity of 390.56 mg/g and a removal efficiency of 96% after five adsorption-desorption cycles. The adsorption process fitted well with the Freundlich isotherm model (R<sup>2</sup>=0.995) and the pseudo-second-order kinetic model (R<sup>2</sup>=0.99), indicating that chemisorption played a dominant role. Thermodynamic analysis revealed that the adsorption of RhB was spontaneous and exothermic. Notably, this study prepared oxide composite nanomaterials from polyoxometalates (POMs) derivatives through a one-step calcination method and applied them for the first time to the adsorption of RhB, providing a novel strategy for the removal of organic pollutants.</p>

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N-Carbon Coated Mn-MoOx Nanocomposite for Efficient Adsorption of Rhodamine B

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Denglin Zhu,
  • Sizhan Shu,
  • Chenqi Zhao,
  • Jun Sun,
  • Qiaoshun Chen,
  • Jiani Wang,
  • Qian Ling,
  • Yuxiang Yao,
  • Hao Yu,
  • Shengyang Ou,
  • Pingfan Wu

摘要

The development of efficient and stable adsorbents for the removal of Rhodamine B (RhB) is of great significance in mitigating its environmental hazards. In this study, a nitrogen-doped carbon composite (Mn-MoOx@NC) was successfully synthesized via high-temperature annealing of [N(C4H9)4]3[MnMo6O18{(OCH2)3CNH2}2] (MnMo6) and dicyandiamide (DCA). The resulting material exhibited excellent adsorption performance, with a maximum adsorption capacity of 390.56 mg/g and a removal efficiency of 96% after five adsorption-desorption cycles. The adsorption process fitted well with the Freundlich isotherm model (R2=0.995) and the pseudo-second-order kinetic model (R2=0.99), indicating that chemisorption played a dominant role. Thermodynamic analysis revealed that the adsorption of RhB was spontaneous and exothermic. Notably, this study prepared oxide composite nanomaterials from polyoxometalates (POMs) derivatives through a one-step calcination method and applied them for the first time to the adsorption of RhB, providing a novel strategy for the removal of organic pollutants.