Cr<3+>-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and preparation method

A nanoparticle, zinc gallate technology, applied in luminescent materials, luminescent coatings, chemical instruments and methods, etc., can solve the problems affecting the application of near-infrared long afterglow luminescent nanomaterials, serious agglomeration of long afterglow nanoparticles, and complicated preparation steps. , to achieve the effect of easy large-scale promotion and use, low cost of raw materials, and low reaction temperature

Inactive Publication Date: 2017-02-22
SHANDONG UNIV
6 Cites 11 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] The currently reported near-infrared long-lasting luminescent nanomaterials are generally prepared by high-temperature solid-phase method and sol-gel method. These methods have the disadvantages of cumbersome preparation steps, long time requ...
View more

Abstract

The invention discloses Cr<3+>-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and a preparation method. The nanoparticles have the atom composition of ZnGaxCryO4, wherein x is in a range of 1.98-2.00, and y is in a range of 0.001-0.02; the particle size is 50-100 nm, 2E-to-4A2 broadband transmission of Cr<3+> is generated, the broadband transmission peak ranges from 600 nm to 850 nm, and the peak value is located at 690-715 nm. The prepared long-afterglow luminescent material has the good properties that the particle size is small, the transmission range is located in a near-infrared light zone, and the afterglow time is long. In the preparation method, the cost of raw materials is low, the method is simple and easy to implement, the reaction temperature is low, requirements for equipment are low, no byproducts are produced and large-scale popularization and utilization are facilitated.

Application Domain

Powder deliveryLuminescent paints +3

Technology Topic

GalliumAfterglow +8

Image

  • Cr&lt;3+&gt;-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and preparation method
  • Cr&lt;3+&gt;-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and preparation method
  • Cr&lt;3+&gt;-doped zinc gallate near-infrared long-afterglow luminescent nanoparticles and preparation method

Examples

  • Experimental program(6)

Example Embodiment

[0039] Example 1
[0040] Add 10ml 0.1mol/L Zn(NO 3 ) 2 Solution, 19.95ml 0.1mol/L Ga(NO 3 ) 3 Solution, 0.1ml 0.05mol/L Cr(NO 3 ) 3 After stirring the solution, the reactant nitrate mixture is obtained. Then, 0.2459 g of glycine and 0.1180 g of carbohydrazide were added to the above mixed solution as organic fuel. Slowly evaporate in a water bath at 80°C until the mixed solution becomes a uniform and transparent sol. The above-mentioned sol is put into a muffle furnace with a furnace temperature of 600° C. and ignited. The combustion reaction is completed rapidly within several tens of seconds, and a white fluffy product is obtained. The above white product was transferred into an agate mortar, and 5 mmol/L sodium hydroxide solution was added to fully grind for 1 hour. After grinding the mixed slurry into distilled water and ultrasonic treatment for 1h, the mass ratio of distilled water to white product is 1000:1. After standing for 72h, take the supernatant and centrifuge at 10000rpm for 10min to obtain near infrared with average particle size less than 100nm Long afterglow luminescent nanoparticles. The atomic ratio composition of the near-infrared long afterglow luminescent nanoparticles is ZnGa 1.995 Cr 0.005 O 4.
[0041] Test the samples prepared in the examples:
[0042] Excitation and emission spectra of samples see figure 1 , Under the excitation of 254nm ultraviolet light, the sample produces Cr 3+ of 2 E→ 4 A 2 Broadband emission, the broadband emission peak ranges from 600nm to 850nm, and the peak is at 690-715nm. The excitation spectrum of the sample covers a wide area from the ultraviolet region to the red region.
[0043] The near-infrared afterglow attenuation curve of the sample see figure 2 The near-infrared afterglow attenuation curve of the sample is obtained by monitoring the relationship between the near-infrared afterglow emission intensity and the attenuation time of the sample at 693nm.
[0044] For the scanning electron micrograph of the sample, see image 3 As can be seen from the figure, the obtained near-infrared long afterglow luminescent nanoparticles are approximately spherical, with a uniform particle size distribution between 50-100nm, which can meet the requirements of biological imaging.

Example Embodiment

[0045] Example 2
[0046] Add 10ml Zn(NO 3 ) 2 Solution, 19.98ml Ga(NO 3 ) 3 Solution, 0.04ml Cr(NO 3 ) 3 The solution is stirred to obtain the reactant nitrate mixture. Then, 0.2459 g of glycine and 0.1180 g of carbohydrazide were added to the above mixed solution as organic fuel. Slowly evaporate in a water bath at 80°C until the mixed solution becomes a uniform and transparent sol. The above sol is put into a muffle furnace with a furnace temperature of 500° C. and ignited, and the combustion reaction is completed quickly within several tens of seconds to obtain a white fluffy product. Transfer the white product to an agate mortar, add 5mmol/L sodium hydroxide solution and grind thoroughly for 1h. After grinding the mixed slurry into distilled water and ultrasonic treatment for 1h, the mass ratio of distilled water to white product is 1000:1. After standing for 72h, take the supernatant and centrifuge at 10000rpm for 10min to obtain near infrared with average particle size less than 100nm Long afterglow luminescent nanoparticles. The atomic ratio composition of the near-infrared long afterglow luminescent nanoparticles is ZnGa 1.998 Cr 0.002 O 4.

Example Embodiment

[0047] Example 3
[0048] Add 10ml Zn(NO 3 ) 2 Solution, 19.9ml Ga(NO 3 ) 3 Solution, 0.2ml Cr(NO 3 ) 3 The solution is stirred to obtain the reactant nitrate mixture. Then, 0.2459 g of glycine and 0.1180 g of carbohydrazide were added to the above mixed solution as organic fuel. Slowly evaporate in a water bath at 80°C until the mixed solution becomes a uniform and transparent sol. The above-mentioned sol is put into a muffle furnace with a furnace temperature of 700° C. and ignited, and the combustion reaction is completed rapidly within tens of seconds, and a white fluffy product is obtained. Transfer the white product to an agate mortar, add 5mmol/L sodium hydroxide solution and grind thoroughly for 1h. After grinding the mixed slurry into distilled water and ultrasonic treatment for 1h, the mass ratio of distilled water to white product is 1000:1. After standing for 72h, take the supernatant and centrifuge at 10000rpm for 10min to obtain near infrared with average particle size less than 100nm Long afterglow luminescent nanoparticles. The atomic ratio composition of the near-infrared long afterglow luminescent nanoparticles is ZnGa 1.99 Cr 0.01 O 4.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Preparation method of submicron transition metal boride powder with low oxygen content

InactiveCN102417188Asmall particle sizeLow degree of reunion
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

Classification and recommendation of technical efficacy words

  • long afterglow
  • Small particle size

Fluorescence coating

InactiveCN103740196AHigh initial brightnesslong afterglow
Owner:ANHUI HUAIHUA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products