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Preparation method of microwave-radiated room-temperature phosphorescent material containing graphene oxide polymer

A technology of room temperature phosphorescence and microwave radiation, which is applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of less research on room temperature phosphorescence materials, and achieve the effect of simple, convenient and efficient method, improved phosphorescence performance, and easy price.

Active Publication Date: 2021-09-28
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There is less research on room temperature phosphorescent materials

Method used

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  • Preparation method of microwave-radiated room-temperature phosphorescent material containing graphene oxide polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of Graphene Oxide Aqueous Solution

[0028] 1) Add 50 mL of 98% H to a 250 mL flat bottom flask 2 SO 4 Place in an ice bath, add 1 g of graphite powder and 0.5 g of sodium nitrate under magnetic stirring, stir and react in an ice bath for 30 min, then place in an ultrasonic cleaning machine for ultrasonic cleaning for 30 min;

[0029] 2) Put it in an ice bath again, slowly add 5 g of potassium permanganate under magnetic stirring, and continue to stir for 4 h after the addition, during which the ultrasonic temperature is kept below 10 °C for 30 min every 30 min.

[0030] 3) The temperature of the water bath was raised to 35 °C, and the magnetic stirring was continued for 3 h, and the sonication was performed for 30 min every 30 min, and the ultrasonic temperature was kept below 10 °C during the ultrasonic process.

[0031] 4) After the reaction, slowly add 50 mL of deionized water, and after 2 days at room temperature, add 5 mL of 30% hydrogen peroxide,...

Embodiment 2

[0038] 1. Synthesis of Graphene Oxide

[0039] With embodiment 1.

[0040] 2. Synthesis of polymer room temperature phosphorescent materials

[0041] Dissolve 1 g of acrylamide in 10 mL of water, add 0.1 mL of the above graphene oxide aqueous solution and 0.008 g of ammonium persulfate, mix and dissolve evenly, and place it in a WBFY201 microwave reactor (2450 ± 50 MHz microwave frequency) at 325W microwave Reflux for 5 minutes under output power, cool to room temperature, precipitate the product with methanol, filter with suction, wash the filter cake with methanol, and freeze-dry to obtain a polymer room temperature phosphorescent material.

[0042] The polymer room-temperature phosphorescent material prepared in this example emits blue-violet light under the irradiation of a 365 nm ultraviolet lamp, and after the 365 nm ultraviolet lamp is turned off, the afterglow time reaches 12 s.

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Abstract

The invention relates to a preparation method of a microwave-radiated room-temperature phosphorescent material containing a graphene oxide polymer. The method comprises the following steps: oxidizing graphite through an improved Hummers method to obtain graphene oxide, dissolving acrylamide in water, adding a graphene oxide aqueous solution and ammonium persulfate according to a mass ratio of acrylamide to graphene oxide to ammonium persulfate to water of 100:(0.0001-0.002):(0.5-1.5):(500-2000), uniformly conducting mixing, carrying out a reflux reaction under the action of microwaves for 3-10 minutes, conducting cooling to room temperature, precipitating the obtained product with methanol, carrying out suction filtration, washing a filter cake with methanol, and conducting freeze-drying to obtain the graphene oxide-containing super-long-life polymer room-temperature phosphorescent material. The prepared polymer phosphorescent material is long in phosphorescent life at room temperature, the luminescent afterglow reaches 16s, meanwhile, the preparation method is simple and convenient, and the product is non-toxic, pollution-free, heavy metal-free, halogen-free, good in water solubility and wide in application prospect.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a preparation method for synthesizing graphene oxide-containing ultra-long-life polymer room temperature phosphorescent materials by microwave radiation. Background technique [0002] At room temperature, due to the weak orbital coupling between the singlet state and the triplet state, the triplet excited state is easy to generate non-radiative transitions through molecular vibration or disturbance, and external quenching caused by oxygen and moisture in the air, etc., it is difficult to achieve effective. Ultra-long lifetime room temperature phosphorescence. At present, the phosphorescence is mainly enhanced by introducing heavy metal atoms and utilizing the strong spin-orbit coupling effect of the heavy metal effect; or by introducing structural units such as halogen heavy atoms, heterocyclic atoms, or aromatic carbonyls, to increase the spin coupling effect and promote pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/56C08K3/04C08F2/46C09K11/06C09K11/02
CPCC08F120/56C08K3/042C08F2/46C09K11/06C09K11/02C09K2211/14
Inventor 林美娟张语珊
Owner FUJIAN NORMAL UNIV
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