In this work, CoFe₂O₄ nanoparticles were fabricated by the Pechini sol–gel technique. Then, Cu₃(BTC)₂ or HKUST-1 metal–organic framework was used to prepare Co-ferrite@HKUST-1 composite. The as-synthesized composite powder and Co-ferrite nanoparticles were compared by their performance for methyl orange (MO) and methylene blue (MB) degradation. X-ray diffractometry (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM) were utilized to evaluate the as-prepared samples. Results showed that the average grain size was about 20–30 nm. The magnetic saturation value for Co-ferrite nanoparticles and Co-ferrite@HKUST-1 composite were 65 and 20 emu/g, respectively. Results of the removal efficiency of the Co-ferrite samples approved that just the cation dyes concentrations decreased, whereas in the case of the Co-ferrite@HKUST-1 composite samples both anionic and cationic organic dyes were degraded efficiently.

中文翻译：

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CoFe 2 O 4 @ HKUST-1 MOF和CoFe 2 O 4纳米颗粒的污染物去除效率比较研究

在这项工作中，通过Pechini溶胶-凝胶技术制备了CoFe ₂ O ₄纳米颗粒。然后，Cu ₃（BTC）₂或使用HKUST-1金属有机框架来制备Co-ferrite @ HKUST-1复合材料。比较了合成后的复合粉末和钴铁氧体纳米颗粒的降解甲基橙（MO）和亚甲基蓝（MB）的性能。X射线衍射法（XRD），透射电子显微镜（TEM），扫描电子显微镜（SEM）和振动样品磁力计（VSM）用于评估制备的样品。结果表明，平均晶粒尺寸约为20–30 nm。Co-铁氧体纳米粒子和Co-ferrite @ HKUST-1复合材料的磁饱和值分别为65和20 emu / g。钴铁氧体样品去除效率的结果表明，仅阳离子染料的浓度降低了，