A kind of preparation method of carbon dot solid phosphor powder

A fluorescent powder and solid-state technology, which is applied in the field of carbon dot solid-state phosphor preparation, can solve the problems such as the disappearance of fluorescence characteristics, and achieve the effects of easy preservation, simple preparation method, and stable photochemical performance

Inactive Publication Date: 2018-04-13
SHENYANG UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, no matter what method or material is used to synthesize the fluorescent carbon dots, the fluorescence characteristics only exist in the solution medium. If the fluorescent carbon dots are dried and made into solid powder, the fluorescence characteristics will disappear immediately.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of carbon dot solid phosphor powder
  • A kind of preparation method of carbon dot solid phosphor powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 1.0 g of citric acid and 0.10 g of ammonium oxalate, mix and grind them evenly, and place them in a constant temperature drying oven at 190° C. for 1 hour to react. After taking out and cooling naturally, a brown foamy solid was obtained. Weigh 0.0001 g of the solid powder and ultrasonically disperse it in water to obtain a fluorescent carbon dot solution. Then, 100 grams of starch was added to the fluorescent carbon dot solution, and ultrasonic dispersion was continued for 30 minutes. Vacuum drying the mixed solution of fluorescent carbon dots and starch to obtain carbon dot solid fluorescent powder.

[0020] figure 1 It is the down-conversion fluorescence spectrum diagram corresponding to the carbon dot solid-state phosphor in Example 1. The fluorescence results show that the sample has good fluorescence performance in the excitation wavelength range of 350-600 nanometers. As the excitation wavelength increases, the maximum peak wavelength of the emitted ligh...

Embodiment 2

[0023] Weigh 1.0 g of ascorbic acid and 0.10 g of urea, mix and grind them evenly, place them in a constant temperature drying oven at 120° C. and heat for 5 hours. After taking out and cooling naturally, a brown foamy solid was obtained. Weigh 0.01 g of the solid powder and ultrasonically disperse it in water to obtain a fluorescent carbon dot solution. Then, 100 grams of starch was added to the fluorescent carbon dot solution, and ultrasonic dispersion was continued for 30 minutes. Vacuum drying the mixed solution of fluorescent carbon dots and starch to obtain carbon dot solid fluorescent powder.

Embodiment 3

[0025] 1.0 g of malic acid and 0.10 g of glycine were weighed, mixed and ground evenly, and placed in a constant temperature drying oven at 210° C. for 1 hour to react. After taking out and cooling naturally, a brown foamy solid was obtained. Weigh 0.1 g of the solid powder and ultrasonically disperse it in water to obtain a solution of fluorescent carbon dots. Then, 100 grams of starch was added to the fluorescent carbon dot solution, and ultrasonic dispersion was continued for 30 minutes. The mixed solution of fluorescent carbon dots and starch is vacuum-dried to obtain solid-state fluorescent powder of carbon dots.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing carbon-dot solid-state fluorescent powder, and relates to a method for preparing fluorescent powder. The method includes particular steps of grinding amino compounds and organic acid, uniformly mixing the amino compounds and the organic acid with one another to obtain mixtures, transferring the mixtures into a constant-temperature tank, enabling the mixtures to react to one another at the temperatures of 120-210 DEG C for 1-5 hours to obtain a product and cooling the product to obtain brown foamy solid; ultrasonically dispersing solid powder in water to obtain fluorescent carbon-dot solution; adding an appropriate quantity of starch into the carbon-dot solution, ultrasonically dispersing the starch in the carbon-dot solution and then naturally drying the carbon-dot solution to obtain the carbon-dot solid-state fluorescent powder. The method has the advantages that raw materials for the carbon-dot solid-state fluorescent powder can come from wide sources, the method and required equipment for synthesizing the carbon-dot solid-state fluorescent powder are simple and are high in synthesis speed, the carbon-dot solid-state fluorescent powder is environmentally friendly, light can be emitted by fluorescent carbon dots in solid states, and the method is convenient to apply to the fields of photoelectric components, biological measurement, entertainment and the like.

Description

technical field [0001] The invention relates to a preparation method of fluorescent powder, in particular to a preparation method of carbon dot solid fluorescent powder. Background technique [0002] In 2004, small carbon nanoparticles with a size of less than 10nm were discovered and named as carbon dots for the first time. As a new type of small-sized carbon nanomaterials. Due to its excellent fluorescence properties, such as strong and stable fluorescence, adjustable excitation and emission wavelengths, and excellent fluorescence emission in the visible region, carbon dots are also called fluorescent carbon dots. In just a few years from the discovery of fluorescent carbon dots to their application, fluorescent carbon dots have become a new star in the carbon nano family, and their applications are becoming more and more extensive. However, the currently prepared fluorescent carbon dots mainly exhibit luminescence in solution media, and the luminescence of solid-state c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65
CPCC09K11/65
Inventor 李洪仁李锋刘军张岩孙弘
Owner SHENYANG UNIV
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap