Silicon dioxide-rare earth-titanium dioxide hybrid material and preparation method thereof

A silicon dioxide and titanium dioxide technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limited practical application, low fluorescence intensity, etc., and achieve the effects of reducing non-radiative transitions, short process flow, and improving stability

Active Publication Date: 2019-01-11
QINGDAO UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a silicon dioxide-rare earth-titania hybrid material with a core-shell structure and its preparation method, which solves the problem that the titanium dioxide hybrid material in the prior art has low fluorescence intensity and limits its practical application

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  • Silicon dioxide-rare earth-titanium dioxide hybrid material and preparation method thereof
  • Silicon dioxide-rare earth-titanium dioxide hybrid material and preparation method thereof
  • Silicon dioxide-rare earth-titanium dioxide hybrid material and preparation method thereof

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preparation example Construction

[0036] A method for preparing a silicon dioxide-rare earth-titanium dioxide hybrid material with a core-shell structure of the present invention comprises the following steps:

[0037] 1) Take a rare earth oxide, add strong acid, stir until dissolved, heat to precipitate crystals, until there is almost no liquid, dry, dissolve in an organic solvent, and prepare a rare earth salt solution with a concentration of 0.08-0.12mol / L;

[0038] 2) Take the first ligand and the second ligand, add an organic solvent to make the first ligand solution and the second ligand solution respectively, the concentration of the first ligand in the first ligand solution is 0.1-0.3mol / L, the concentration of the second ligand in the second ligand solution is also 0.1-0.3mol / L;

[0039] 3) Take silicon dioxide and dissolve it in an organic solvent to make a silicon dioxide solution. The mass concentration of silicon dioxide in the silicon dioxide solution is 3×10 -3 -5×10 -3 g / mL;

[0040] 4) Tak...

Embodiment 1

[0052] A method for preparing a silicon dioxide-rare earth-titanium dioxide hybrid material with a core-shell structure of the present invention comprises the following steps:

[0053] 1) Take 1.3459g of neodymium oxide, add 3mL of concentrated sulfuric acid, stir until dissolved, heat in an oil bath at 50°C to precipitate crystals until there is almost no liquid, and cannot be dried into powder, and dry in an oven at 40°C to obtain neodymium sulfate for use ; Get neodymium sulfate, be dissolved in methanol, make concentration and be the neodymium sulfate solution of 0.08mol / L;

[0054] 2) Take the first ligand - acetylacetone and the second ligand - 1,10-phenanthroline, add methanol to make the first ligand solution and the second ligand solution respectively, in the first ligand solution The concentration of the first ligand is 0.1mol / L, and the concentration of the second ligand in the second ligand solution is 0.3mol / L;

[0055] 3) Take silicon dioxide and dissolve it in ...

Embodiment 2

[0062] A method for preparing a silicon dioxide-rare earth-titanium dioxide hybrid material with a core-shell structure of the present invention comprises the following steps:

[0063] 1) Take 0.2g of terbium oxide, add 7mL of concentrated nitric acid, stir until dissolved, heat in an oil bath at 50°C to precipitate crystals until there is almost no liquid and cannot be dried into powder, and dry in an oven at 40°C to obtain terbium nitrate for use Get terbium nitrate, dissolve it in dehydrated alcohol, make the terbium nitrate solution that concentration is 0.12mol / L;

[0064] 2) Take the first ligand - 2-thienoyltrifluoroacetone and the second ligand - 1,10-phenanthroline, add absolute ethanol to make the first ligand solution and the second ligand respectively solution, the concentration of the first ligand in the first ligand solution is 0.3mol / L, and the concentration of the second ligand in the second ligand solution is 0.1mol / L;

[0065] 3) Preparation of silica micros...

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Abstract

The invention puts forward a silicon dioxide-rare earth-titanium dioxide hybrid material and a preparation method thereof. The material comprises silicon dioxide, a rare earth complex and titanium dioxide. The silicon dioxide is the core and is externally coated with the rare earth complex to form a first shell, and the rare earth complex is external coated with titanium dioxide to form a second shell; and the mass ratio of silicon dioxide to the rare earth complex to titanium dioxide in the hybrid material is 1:0.3:0.6-2:0.1:1.7. The hybrid material has a core-shell structure, uniform size distribution, good morphology and uniform dispersion; the rare earth complex is coated with silica spheres to overcome the problem that the rare earth complex is easy to agglomerate, has good fluorescence performance, and is greatly applied in the fields of energy storage, solar cells, photonic devices, catalysis and the like; titanium dioxide is at the outermost layer of the hybrid material, whicheffectively reduces the nonradiative transition of rare earth complexes, optimizes the luminous efficiency of the rare earth complex and improves stability.

Description

technical field [0001] The invention relates to the technical field of hybrid materials, in particular to a silicon dioxide-rare earth-titania hybrid material with a core-shell structure and a preparation method thereof. Background technique [0002] Hybrid material (Hybrid material) is a mixture of two nano- or molecular-level components. It is a composite material containing two nano- or molecular-level components. fourth-generation materials. In nature, hybrid materials are usually a mixture of an inorganic substance and an organic substance. Therefore, it is different from traditional composites or composite materials, where the size of the components is in the macroscopic range of microns to millimeters; hybrid materials are mixed on the microscopic scale, and the internal structure is relatively uniform. Instead of showing properties between two phases, hybrid materials show new properties. [0003] Nano titanium dioxide (TiO 2 ) is an important inorganic functiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/06
CPCC09K11/02C09K11/06C09K2211/182
Inventor 王薇李国鹏唐建国王瑶刘继宪黄林军王彦欣李磊李付霞杨传开
Owner QINGDAO UNIV
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