Preparation And Microstructure And Properties Of Magnetical MWNTs Based One-Dimentional Nanohybrids

Multifunctional one-dimensional nanohybrids owns unique structure and properties, which bring them broad purpose in biology, chemical industry and so on. In this paper, St?ber method, calcine method, one-pot polyol process were applied with MWNTs/Fe₃O₄ as matrix to prepare MWNTs/Fe₃O₄@SiO₂(FITC) one dimensional nanohybrids, Fe₂O₃@SiO₂ magnetic nanotube and Fe₂O₃ magnetic nanotube, MWNTs/Fe₃O₄@ZnO one-dimensional nanohybrids. The phase structure was studied by XRD, chemical structure was studied by FTIR, morphology was studied by SEM and TEM; the magnetic property was tested by PPMS, the fluorescence property was tested by fluorescence spectrometer, the photocatalysis property was tested by UV light spectrometer, the Pb²⁺ adsorption property was studied by atom adsorption spectrometer.Uniform SiO₂(FITC) was synthesized by St?ber method on surface of MWNTs/Fe₃O₄, the amount of loaded SiO₂(FITC) was increased with the increase of TEOS. The nanohybrids has strong fluorescence intensity and excellent fluorescence leaking and bleaching endurablity. The fluorescence was increased with the increase of TEOS and FITC. The nanohybrids was superparamagnetic, and have favorable MRI image property. The saturation magnetization was decreased with the increase of TEOS.The Fe₃O₄ in MWNTs/Fe₃O₄@SiO₂ and MWNTs/Fe₃O₄ convert to Fe₂O₃ after calcination, Fe₂O₃@SiO₂ magnetic nanotube and Fe₂O₃ nanotube were obtained, they are both superparamagnetic., Fe₂O₃@SiO₂ magnetic nanotube modified with sulfydryl can adsorb Pb²⁺ from water.MWNTs/Fe₃O₄@ZnO one-dimensional nanohybrids with both magnetic and photocatalysis properties was synthesized by one-pot polyol process. ZnO loaded amount increased and the saturation magnetization was decreased with the increase of Zn(Ac)₂·2H₂O. The nanohybrids has the ability of decomposite methyl orange by photocatalitic, with the increase of the consistence of nanohybrids, the photocatalytic activity increased firstly and then decreased. The nanohybrids has excellent photocatalytic properties still, after drawback by magnetic.