In this study, mesoporous halloysite nanotubes (HNTs) were modified by CuFe₂O₄ nanoparticles for the first time. The morphology, porosity and chemistry of the CuFe₂O₄@HNTs nanocomposite were fully characterized by Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM) image, transmission electron microscope (TEM) images, energy-dispersive X-ray (EDX), X-ray diffraction (XRD) pattern, Brunauer-Emmett-Teller (BET) adsorption-desorption isotherm, thermogravimetric (TG) and vibrating sample magnetometer (VSM) curve analyses. The results confirmed that CuFe₂O₄ with tetragonal structure, uniform distribution, and less agglomeration was located at HNTs. CuFe₂O₄@HNTs nanocomposite special features were high thermal stability, crystalline structure, and respectable magnetic property. SEM and TEM results showed the nanotube structure and confirmed the stability of basic tube in the synthetic process. Also, inner diameters of tubes were increased in calcination temperature at 500 °C. A good magnetic property of CuFe₂O₄@HNTs led to use it as a heterogeneous catalyst in the synthesis of pyrazolopyridine derivatives. High efficiency, green media, mild reaction conditions and easily recovery of the nanocatalyst are some advantages of this protocol.

在这项研究中，介孔的埃洛石纳米管（HNTs）首次被CuFe ₂ O ₄纳米颗粒改性。通过傅立叶变换红外（FT-IR）光谱，场发射扫描电子显微镜（FE-SEM）图像，透射电子显微镜（TEM）图像充分表征了CuFe ₂ O ₄ @HNTs纳米复合材料的形貌，孔隙率和化学性质，能量色散X射线（EDX），X射线衍射（XRD）图，Brunauer-Emmett-Teller（BET）吸附-解吸等温线，热重（TG）和振动样品磁力计（VSM）曲线分析。结果证实CuFe ₂ O ₄HNTs处为四方结构，分布均匀，团聚少。的CuFe ₂ ø ₄ @HNTs纳米复合特殊特征是热稳定性高，晶体结构，和尊敬的磁特性。SEM和TEM结果显示了纳米管的结构，并证实了基本管在合成过程中的稳定性。另外，在500℃的煅烧温度下，管的内径增加。CuFe ₂ O ₄ @HNTs的良好磁性使其在吡唑并吡啶衍生物的合成中用作非均相催化剂。高效，绿色介质，温和的反应条件以及易于回收的纳米催化剂是该协议的一些优势。