Preparation method and application of a rare earth yttrium-doped alumina nanomaterial

Abstract

The invention provides a preparation method and application of a rare earth yttrium-doped alumina nano-material, comprising: step 1, preparing an aluminum sulfate solution; step 2, preparing a sodium metaaluminate solution; step 3, adding the sodium metaaluminate solution dropwise into the aluminum sulfate solution to obtain a suspension; step 4, aging the suspension to obtain a white precipitate; step 5, washing the white precipitate; step 6, washing the white precipitate and hexadecyl triethyl Ammonium bromide is added to water to obtain a mixed solution; step 7, adding rare earth yttrium nitrate to the mixed solution to obtain a rare earth mixed solution; step 8, performing static crystallization on the rare earth mixed solution, and then drying to obtain rare earth yttrium-doped alumina Precursor of nanomaterials; step 9, calcining to obtain rare earth yttrium-doped alumina nanomaterials, and using it to adsorb arsenic in water. The nanometer material prepared by the invention has the properties of uniform doping and uniform crystal pore size, can be used to adsorb arsenic in water, and has good application prospects.

Description

technical field [0001] The invention relates to a preparation method of a rare earth-doped alumina nanometer material. More specifically, the present invention relates to a preparation method of rare earth yttrium-doped alumina nanometer material. Background technique [0002] The unique properties of nanoparticles make them have broad realistic and potential application prospects in catalysts, functional materials, composite materials, optical materials and ceramic materials. For example, nanoparticles have high specific surface area and high surface activity, and their use in catalytic materials has remarkable catalytic efficiency. [0003] It is well known that alumina undergoes a series of phase transitions during the calcination process, and finally a stable phase of alumina (α-Al 2 o 3 ), wherein the crystal form of the intermediate state is the transition state alumina, and the γ-Al in the transition state alumina 2 o 3 and δ-Al 2 o 3 Because of its large speci...

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Problems solved by technology

[0004] Studies have found that adding impurity elements can improve the thermal stability of activated alumina. The additives used to improve the thermal stability of alumina are generally rare earth metal oxides, alkaline earth metal oxides, etc., and the effect is significant. Currently, the thermal stability of alumina is improved. For stability, impregnation (additives) is often used, that is, the surface of alumina is modified to increase the stability of alumina, and there is a lack of research on other addition methods