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Silver nano-cluster fluorescent nanorod, preparation method thereof, and application of nanorod in white LED

A silver nanocluster, fluorescent nanotechnology, applied in nano-optics, nanotechnology, nanotechnology and other directions, can solve the problems of waste of resources, limited synthesis methods, cumbersome preparation methods, etc., to achieve novel structure, unique properties, strong fluorescence characteristics Effect

Active Publication Date: 2019-10-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned materials mainly have the following disadvantages: 1. Contain a variety of metal elements, and are fluorides, resulting in waste of resources and environmental damage; 2. The preparation method is cumbersome, and the hydrothermal method is used, which increases the production cost
[0005] At present, the reports on silver nanoclusters are limited to the exploration of synthesis methods and the study of solid-state properties, and there are few reports on the regulation of the aggregate morphology of silver nanoclusters in aqueous solution and their application as light conversion materials in the field of LEDs.

Method used

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  • Silver nano-cluster fluorescent nanorod, preparation method thereof, and application of nanorod in white LED
  • Silver nano-cluster fluorescent nanorod, preparation method thereof, and application of nanorod in white LED
  • Silver nano-cluster fluorescent nanorod, preparation method thereof, and application of nanorod in white LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A method for preparing fluorescent nanorods of silver nanoclusters, comprising the following steps:

[0058] (1)Ag 9 molecular synthesis

[0059] Accurately weigh AgNO 3 (1mmol, 170mg) and H 2 mba (1 mmol, 155 mg) was dispersed in 6 mL of water and sonicated in a KQ5200DE instrument for 20 minutes (80 W, 40 kHz), NH was added to the above mixture during sonication 3 ·H 2 O (25%, 0.5mL), yielded yellow transparent Ag 9 solution.

[0060] (2) preparation of hydrochloric acid aqueous solution

[0061] Accurately pipette the concentrated hydrochloric acid liquid, add water three times, measure it with a pH tester, and prepare an aqueous hydrochloric acid solution with pH=1;

[0062] (3) Preparation of silver nanocluster fluorescent rods

[0063] Measure 50 μL of Ag 9 For the aqueous solution, add 670 μL of water three times, then add 280 μL of hydrochloric acid with pH=1, vortex for 30 s to mix evenly, the concentration of hydrochloric acid after mixing is 28 mmol / ...

Embodiment 2

[0070] As described in Example 1, a method for preparing fluorescent nanorods of silver nanoclusters comprises the following steps:

[0071] Measure 50 μL of Ag 9 For the aqueous solution, add 650 μL of water three times, then add 300 μL of hydrochloric acid with pH=1, vortex for 30 s to mix evenly, the concentration of hydrochloric acid after mixing is 30 mmol / L, and then stand in a thermostat at 20°C for 24 hours to obtain the solution.

[0072] The Ag obtained in this embodiment 9 The molecular structure diagram of figure 1 shown. Depend on figure 1 It can be seen that Ag 9 It is a nine-core silver nanocluster.

[0073] The present embodiment obtains the TEM figure of silver nanocluster fluorescent nanorod, as figure 2 (b) shown. Silver nanocluster fluorescent nanorods present an ordered and regular structure. The nanorods have a diameter of 20-30nm and a length of 300-400nm.

Embodiment 3

[0075] As described in Example 1, a method for preparing fluorescent nanorods of silver nanoclusters comprises the following steps:

[0076] Measure 50 μL of Ag 9 For the aqueous solution, add 630 μL of water three times, then add 320 μL of hydrochloric acid with pH=1, vortex for 30 s to mix evenly, the concentration of hydrochloric acid after mixing is 32 mmol / L, and then stand in a 20°C incubator for 24 hours to obtain the product.

[0077] The Ag obtained in this embodiment 9 The molecular structure diagram of figure 1 shown. Depend on figure 1 It can be seen that Ag 9 It is a nine-core silver nanocluster.

[0078] The present embodiment obtains the TEM figure of silver nanocluster fluorescent nanorod, as figure 2 (c) shown. Silver nanocluster fluorescent nanorods present an ordered and regular structure. The nanorods have a diameter of 20-30nm and a length of 300-400nm.

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Abstract

The invention relates to a silver nano-cluster fluorescent nanorod, a preparation method thereof, and an application of the nanorod in white LED. The fluorescent nanorod is formed by self-assembling Ag9 and hydrochloric acid in an aqueous solution. The Ag9 fluorescent nanorod prepared in the invention has outstanding optical properties, still maintains excellent fluorescent performances after being freeze-dried into a powder, can be used to prepare orange red light-emitting LED with a good stability, and can be mixed with a commercial blue phosphor and a commercial green phosphor according toa mass ratio of 10:5:1 to prepare the white light-emitting LED. The luminescent silver cluster can successfully replace the light conversion material of traditional materials in order to provide possibility for producing environmentally-friendly LEDs. The preparation method of the silver nano-cluster fluorescent nanorod of the invention has the advantages of simplicity and low cost; and the prepared LED has an excellent luminous intensity, and meets environmental protection requirements.

Description

technical field [0001] The invention relates to a method for preparing fluorescent nanorods of silver nanoclusters and its application in white light LEDs, belonging to the field of new materials. Background technique [0002] Light is very important to human learning and life. According to statistics, more than 20% of the world's electric energy is used for lighting every year. Therefore, how to save energy and improve lighting efficiency is particularly critical in the field of lighting. Compared with traditional fluorescent lamps and incandescent lamps, solid-state lighting in the form of light-emitting diodes (LEDs) has excellent properties such as fast response time, high luminous efficiency, and wide temperature control range. Therefore, it has received more and more extensive research and attention. Until now, commercial LEDs were typically fabricated by coating a blue-violet emitting InGaN / GaN chip with a color-converting material. Color-converting materials can ful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/10C09K11/06B82Y20/00B82Y40/00H01L33/50
CPCB82Y20/00B82Y40/00C07F1/005C09K11/06C09K2211/188H01L33/504Y02B20/00
Inventor 辛霞孙盼盼孙頔王芝
Owner SHANDONG UNIV
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