Scholarlink

<p>The synthesis of Cu<sub>x</sub>Mn<sub>(1−x)</sub>Fe<sub>2</sub>O<sub>4</sub> magnetic nanoparticles (MNPs) was carried out via self-propagating combustion process, their characterizations were performed using VSM, TEM, and XRD. To achieve an increased surface-to-mass ratio and optimal saturation magnetization for separation, the component ratio, calcination temperature and solvent dosage were optimized. For methyl blue (MB) removal, Cu<sub>0.1</sub>Mn<sub>0.9</sub>Fe<sub>2</sub>O<sub>4</sub> MNPs thermally processed at 400&#xa0;°C for 2&#xa0;h demonstrated a mean diameter of 16 ± 4&#xa0;nm and saturation magnetization of 26.8 emu/g. MB adsorption mechanisms on Cu<sub>0.1</sub>Mn<sub>0.9</sub>Fe<sub>2</sub>O<sub>4</sub> MNPs were resolved via kinetic, isothermal and thermodynamic analyses. MB adsorption on Cu<sub>0.1</sub>Mn<sub>0.9</sub>Fe<sub>2</sub>O<sub>4</sub> MNPs was optimally modeled by pseudo-second-order kinetics and the Langmuir isotherm (R<sup>2</sup>  &gt; 0.98), capturing both the uptake dynamics and equilibrium state, signifying monolayer adsorption governed by chemisorption; while, thermodynamic statistical analysis confirmed endothermic MB adsorption on Cu<sub>0.1</sub>Mn<sub>0.9</sub>Fe<sub>2</sub>O<sub>4</sub> MNPs (ΔH° &gt; 0) in the thermodynamic temperature range of 303–323&#xa0;K, with elevated temperatures significantly enhancing removal efficiency due to favorable energetics. The positive correlation between pH elevation and adsorption capacity revealed pH-tunable adsorption characteristics. After 4 cycles, with 73.3% retention of initial adsorption capacity, Cu<sub>0.1</sub>Mn<sub>0.9</sub>Fe<sub>2</sub>O<sub>4</sub> MNPs demonstrated moderate cyclic stability and significant potential for dye removal applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Adsorption performances and electrochemical characteristics of methyl blue onto CuxMn(1−x)Fe2O4 magnetic nanoparticles prepared via the self-propagating combustion process

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月4日

查看全文
  • Lei Sun,
  • Min Liu,
  • Zhou Wang

摘要

The synthesis of CuxMn(1−x)Fe2O4 magnetic nanoparticles (MNPs) was carried out via self-propagating combustion process, their characterizations were performed using VSM, TEM, and XRD. To achieve an increased surface-to-mass ratio and optimal saturation magnetization for separation, the component ratio, calcination temperature and solvent dosage were optimized. For methyl blue (MB) removal, Cu0.1Mn0.9Fe2O4 MNPs thermally processed at 400 °C for 2 h demonstrated a mean diameter of 16 ± 4 nm and saturation magnetization of 26.8 emu/g. MB adsorption mechanisms on Cu0.1Mn0.9Fe2O4 MNPs were resolved via kinetic, isothermal and thermodynamic analyses. MB adsorption on Cu0.1Mn0.9Fe2O4 MNPs was optimally modeled by pseudo-second-order kinetics and the Langmuir isotherm (R2  > 0.98), capturing both the uptake dynamics and equilibrium state, signifying monolayer adsorption governed by chemisorption; while, thermodynamic statistical analysis confirmed endothermic MB adsorption on Cu0.1Mn0.9Fe2O4 MNPs (ΔH° > 0) in the thermodynamic temperature range of 303–323 K, with elevated temperatures significantly enhancing removal efficiency due to favorable energetics. The positive correlation between pH elevation and adsorption capacity revealed pH-tunable adsorption characteristics. After 4 cycles, with 73.3% retention of initial adsorption capacity, Cu0.1Mn0.9Fe2O4 MNPs demonstrated moderate cyclic stability and significant potential for dye removal applications.