Superparamagnetism material carrying CuO and preparation method thereof

Abstract

The invention relates to an ultra-paramagnetic material of load CuO, which is composed of ultra-paramagnetic particles, a mesoporous material layer, and CuO loaded on the internal and the external surfaces of mesoporous material layer; the preparation method includes: produce ultra-paramagnetic particle or its infusible precursor with the common sedimentation method; cover a layer of compact SiO2 or molecular sieve on the surface of the ultra-paramagnetic particle or the infusible precursor chemically with the sol-gel method; increase the temperature and maintain the temperature in gas atmosphere; samples obtained are placed into infusible cupric salt solution for separation, washing, filtering, and drying; burn in gas atmosphere; obtain the material with performances such as ultra-paramagnetism, catalyzing, and decoking. On one hand, the invention solves the problem of stability and conglobation of ultra-paramagnetic particle in the using process, and on the other hand, the invention makes it easier to separate catalyzer and desulfurizer in the using process. Meanwhile, the ultra-paramagnetic material of load CuO is also an infrared radiation material or microwave absorption material with high performance.

Description

technical field

[0001] The present invention relates to new materials and their synthesis techniques, specifically including CuO-loaded superparamagnetic materials and their preparation methods Background technique

[0002] Superparamagnetic materials refer to a class of nanomaterials that show magnetism in an external magnetic field when the size of the magnetic particles reaches or is smaller than a certain critical size, but their magnetism disappears after the magnetic field is removed. At present, superparamagnetic nanomaterials have been applied in chemical industry, machinery, electronics, printing, medicine and other industries, such as high-density magnetic recording materials, gas sensor devices, magnetic immune cell separation, nuclear magnetic resonance imaging and controlled release of drugs. Because nano-ions are easy to agglomerate, they lose some special properties that only nano-structures have. Agglomeration can be prevented by adding surfactants such as o...