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Nanometer fluorescence material with nuclear shell structure and preparation method thereof

A technology of fluorescent nanomaterials and core-shell structure, applied in the field of fluorescent nanomaterials with core-shell structure and its preparation, can solve the problems of low crystallinity, achieve good crystallization, convenient operation, and reduce production costs

Inactive Publication Date: 2012-10-24
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that CePO prepared in acidic solution (pH = 1) 4 It is nanorod-shaped and has good crystallinity, while the sample prepared in alkaline solution (pH=12) is spherical nanoparticles with low crystallinity

Method used

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  • Nanometer fluorescence material with nuclear shell structure and preparation method thereof
  • Nanometer fluorescence material with nuclear shell structure and preparation method thereof
  • Nanometer fluorescence material with nuclear shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Preparation of cerium phosphate with monoclinic structure

[0046] Prepare monoclinic cerium phosphate according to the following steps

[0047] 1) 0.434g Ce(NO 3 ) 3 ·6H 2 O and 0.156 g NaH 2 PO 4 2H 2 O was added to 15mL distilled water, stirred evenly, all the obtained suspension A was transferred to a 20ml pressure-resistant reactor, and the reactor was sealed;

[0048] 2) Put the reaction kettle into an oven and heat it to 200°C, keep it warm for 24 hours, then cool it down to 20°C to obtain the monoclinic CePO of the present invention 4 suspension.

[0049] The prepared cerium phosphate was detected by X-ray diffraction method, and the performance index measurement results are shown in Table 1.

[0050] Fluorescence intensity of cerium phosphate was detected at an excitation wavelength of 280 nm by a Fluorolog-3 fluorescence spectrometer (JOBIN YVON), and the detection results are shown in Table 2.

[0051] figure 2 (a) is the X-ray diffraction spect...

Embodiment 2

[0066] 1. In the process of preparing the monoclinic cerium phosphate solution, except that the reactant is 0.372g CeCl 3 ·7H 2 O and 0.358gNa 2 HPO 4 12H 2 0, temperature of reaction is 230 ℃, and the reaction times is except that 12h, all the other are identical with embodiment 1;

[0067] The X-ray diffraction detection results of the prepared cerium phosphate nanorods are shown in Table 1, and the X-ray diffraction spectrum is completely consistent with the standard JCPDS card (No.32-0199); the fluorescence intensity detection results are shown in Table 2.

[0068] Figure 8 (a) is the fluorescence spectrum of cerium phosphate nanorods.

[0069] 2. In the process of preparing cerium phosphate / lanthanum phosphate nanorods, except that the reactant is 0.185g LaCl 3 ·7H 2 O and 0.179g Na 2 HPO 4 12H 2 O, the reaction temperature is 160°C, and the reaction time is 60h, all the other are the same as in Example 1.

[0070] The fluorescence intensity of the prepared ce...

Embodiment 3

[0074] 1. During the preparation of monoclinic cerium phosphate suspension, except that the reactant is 0.372g CeCl 7H 2 o 3 and 0.380g Na 3 PO 4 12H 2 0, temperature of reaction is 180 ℃, and the reaction times is outside 72h, identical with embodiment 1;

[0075] The X-ray diffraction detection results of the prepared cerium phosphate nanorods are shown in Table 1, and the X-ray diffraction spectrum is completely consistent with the standard JCPDS card (No.32-0199); the fluorescence intensity detection results are shown in Table 2.

[0076] Figure 9 (a) is the fluorescence spectrum of cerium phosphate nanorods.

[0077] 2. In the process of preparing cerium phosphate / lanthanum phosphate nanorods, except that the reactant is 0.158g La(Ac) 3 and 0.190gNa 3 PO 4 12H 2 O, the reaction temperature is 200°C, and the reaction time is 12h, the rest are the same as in Example 1.

[0078] The fluorescence intensity of the prepared cerium phosphate / lanthanum phosphate nanoro...

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Abstract

The invention discloses a preparation method of a nanometer fluorescence material with a nuclear shell structure, which comprises the following steps carried out in order: a) carrying out a reaction of cerate and phosphate to prepare cerous phosphate with a monocline structure; and b) carrying out a reaction of lanthanite and phosphate in a colloidal solution of cerous phosphate to prepare the cerous phosphate / lanthanum phosphate nano rods. The preparation method of the invention has the characteristics of cheap raw material, simple process, convenient operation, controllable product appearance, high fluorescence efficiency of the prepared fluorescence nanometer materials and the like.

Description

technical field [0001] The invention relates to a luminescent material containing cerium phosphate and a preparation method thereof, in particular to a nanostructure luminescent material containing cerium phosphate used for preparing high-performance devices such as sensors, catalysts and heat-resistant materials and a preparation method thereof. Background technique [0002] Nanomaterials have attracted great attention due to their unique chemical and physical properties, especially one-dimensional nanomaterials (such as nanorods, nanotubes, nanowires, and nanobelts, etc.) Diameter ratio, etc.) and show superior electrical, optical, magnetic and mechanical properties. In particular, one-dimensional nano-rare earth compounds exhibit unique optical properties due to their unique electronic structures and transition modes, and have been applied in optoelectronic nanodevices and bioluminescent labels. Because rare earth orthophosphate has high luminous efficiency under the exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81C09K11/02
Inventor 马明国
Owner BEIJING FORESTRY UNIVERSITY
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