Hajihashemi R, Rashidi Ali M, Alaie M, Mohammadzadeh R, Izadi N
Department of Physics, Payame Noor University, Mashhad, Iran.
Nanotechnology Research Center, Research Institute of Petroleum Industry, P.O., Tehran, Iran.
Mater Sci Eng C Mater Biol Appl. 2014 Nov;44:417-21. doi: 10.1016/j.msec.2014.08.013. Epub 2014 Aug 21.
Nano-composite of multiwall carbon nanotube, decorated with NiFe2O4 nanoparticles (NiFe2O4-MWCNT), was synthesized using the sol-gel method. NiFe2O4-MWCNTs were characterized using different methods such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM). The average size of the crystallites is 23.93 nm. The values of the saturation magnetization (MS), coercivity (HC) and retentivity (MR) of NiFe2O4-MWCNTs are obtained as 15 emu g(-1), 21Oe and 5 emu g(-1), respectively. In this research, NiFe2O4-MWCNT thin films were prepared with the spin-coating method. These thin films were used as the H2S gas sensor. The results suggest the possibility of the utilization of NiFe2O4-MWCNT nano-composite, as the H2S detector. The sensor shows appropriate response towards 100 ppm of H2S at 300°C.
采用溶胶 - 凝胶法合成了用NiFe₂O₄纳米颗粒修饰的多壁碳纳米管纳米复合材料（NiFe₂O₄ - MWCNT）。使用不同方法对NiFe₂O₄ - MWCNTs进行了表征，如X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、高分辨率透射电子显微镜（HRTEM）、原子力显微镜（AFM）和振动样品磁强计（VSM）。微晶的平均尺寸为23.93nm。NiFe₂O₄ - MWCNTs的饱和磁化强度（Ms）、矫顽力（Hc）和剩磁（Mr）值分别为15emu g⁻¹、21Oe和5emu g⁻¹。在本研究中，采用旋涂法制备了NiFe₂O₄ - MWCNT薄膜。这些薄膜用作H₂S气体传感器。结果表明，NiFe₂O₄ - MWCNT纳米复合材料有可能用作H₂S探测器。该传感器在300°C时对100ppm的H₂S表现出适当的响应。
