A kind of direct preparation method of dy2(moo4)3 film

Abstract

The invention discloses a direct preparation method of a Dy2(MoO4)3 film. Dy(NO3)3.6H2O is dissolved in deionized water so as to prepare a solution of which the total concentration of rare earth ions is 0.005 to 1 mol / L, EDTA or citric acid, a NaOH solution, Na2MoO4.2H2O, KCl and HNO3 are added to the solution and are uniformly mixed so as to obtain an electrodepositing solution, and the electrodepositing solution is put in a water bath, so that the temperature reaches the required temperature; a three-electrode system is inserted into the electrodepositing solution so as to deposit a film on conducting glass through electrodeposition, the film is flushed respectively with deionized water and absolute ethyl alcohol, then the film is put in a blast air oven so as to be dried, and then the dry electrodepositing film is put in a tube furnace for heat treatment so as to prepare the Dy2(MoO4)3 film. Compared with a traditional method of making powder first and then forming the film, the direct preparation method has the advantage of simplicity in operation, short consuming time and good quality of the film, the preparation method of the film is greatly simplified, and additionally, the influence of the powder morphology on the film forming quality is avoided.

Description

technical field [0001] The invention belongs to the technical field of materials science, in particular to a Dy 2 (MoO 4 ) 3 Direct preparation of thin films. Background technique [0002] Rare earth luminescent materials of molybdate system are used as fluorescent materials in solid-state lighting, flat panel displays, lasers and other fields because of their good chemical stability and high fluorescence quantum efficiency. An important prerequisite for the deviceization of luminescent materials. At present, there are various methods to prepare rare earth molybdate materials with different morphologies, such as sol-gel method, hydrothermal method, solid-phase method, microwave method, etc. The principle of the sol-gel method is that the alkoxide or ester compound is dissolved in an organic solvent, and undergoes a hydrolysis reaction to form an active monomer, which is then polymerized to form a sol, and the sol is polymerized to form a gel with a certain spatial struct...

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Problems solved by technology

The principle of the sol-gel method is that an alkoxide or an ester compound is dissolved in an organic solvent, and undergoes a hydrolysis reaction to form an active monomer. The monomer is then polymerized to form a sol, and the sol is polymerized to form a gel with a certain spatial structure, and then dried. And heat treatment to remove the organic matter, sintering and solidification to form the required nanomaterials. The nanomaterials of the molybdate system prepared by this method are mostly nanorods with uneven surfaces, and are prone to agglomeration. Materials with this shape are not suitable for making Film formation; the hydrothermal method is to create a high temperature and high pressure environment to dissolve the insoluble or insoluble substances under atmospheric conditions, or to react to form the dissolved products of the substances, and to convect the reactants by controlling the temperature difference of the solution in the autoclave. A supersaturated state is formed to precipitate growth crystals. The nanomaterials of the molybdate system prepared by this method are mostly in the shape of flowers, and each flower is composed of multiple nanosheets, and these nanosheets are stable enough and not easy to disperse. The similar morphology is also not suitable for making thin films; solid-phase method generally refers to a method that uses solid-phase substances to participate and produce powders through phase changes. The powders prepared by this method are not fine enough and not uniform, so It is also impossible to obtain the ideal morphology for preparing high-quality thin films; microwave synthesis is widely used in nano During the synthesis process of the material, the morphology of the product prepared by the microwave method is prone to agglomeration, so the obtained product is still not ideal for the preparation of high-quality thin films

[0003] In summary, the synthesis conditions of the above methods are relatively high, which is reflected in the high synthesis temperature and high requirements on the reaction vessel; except for the microwave method, the synthesis process of other methods takes a long time; the most important thing is to use the above The morphology of the nanomaterials obtained by the method is not suitable for the preparation of high-quality light-emitting films, which greatly limits its application

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