A kind of preparation method of graphene quantum dot sensitized europium and terbium co-doped layered hydroxide and product prepared therefrom

A technology of layered hydroxides and graphene quantum dots, applied in the preparation/processing of lanthanide oxides/hydroxides, rare earth metal oxides/hydroxides, rare earth metal compounds, etc., can solve the problem of GQD multiple Problems such as disordered layer structure and difficulty in precisely controlling the product structure achieve excellent optical properties, high luminous efficiency, and improved luminous efficiency

Active Publication Date: 2022-08-09
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] At present, the sensitization effect of GQD on rare earth elements is only found in aqueous solution system, but due to the randomness of the reaction in aqueous solution system, it is difficult to precisely control the structure of the product, and the product will inevitably agglomerate, resulting in the obtained GQD having a multilayer structure or greater disorder

Method used

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  • A kind of preparation method of graphene quantum dot sensitized europium and terbium co-doped layered hydroxide and product prepared therefrom
  • A kind of preparation method of graphene quantum dot sensitized europium and terbium co-doped layered hydroxide and product prepared therefrom
  • A kind of preparation method of graphene quantum dot sensitized europium and terbium co-doped layered hydroxide and product prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 0.99mmol of Tb(NO 3 ) 3 ·6H 2 O, 0.01 mmol of Eu(NO 3 ) 3 ·6H 2 O, 10 mmol NaNO 3 and 0.5 mmol of HMT dissolved in 80 mL of exhausted water, stirred evenly, then transferred to a 100 mL reaction kettle, reacted at 80 °C for 15 h, cooled to room temperature, washed and precipitated after centrifugation, and dried to obtain NO 3 -LEu 0.01 Tb 0.99 H.

[0036] Take 0.3 mmol of NO 3 -LEu 0.01 Tb 0.99 H and 3 mmol Na 3 C 6 H 5 O 7 ·2H 2 O was dissolved in 80 mL of exhausted water, stirred evenly, then transferred to a 100 mL reaction kettle, reacted at 95 °C for 20 h, cooled to room temperature, washed and precipitated after centrifugation, and dried to obtain CA-LEu 0.01 Tb 0.99 H.

[0037] Weigh 0.1g of CA-LEu 0.01 Tb 0.99 H was dispersed in 80 mL of exhausted water, 4 g of ammonia water was added, stirred evenly, and then transferred to a 100 mL reaction kettle, reacted at 150 °C for 10 h, cooled to room temperature, and after centrifugation, the s...

Embodiment 2

[0039] Take 0.91 mmol of Tb(NO 3 ) 3 ·6H 2 O, 0.09 mmol of Eu(NO 3 ) 3 ·6H 2 O, 14 mmol NaNO 3 and 1 mmol of HMT were dissolved in 80 mL of exhausted water, stirred evenly, and then transferred to a 100 mL reaction kettle, reacted at 90 °C for 12 h, cooled to room temperature, washed and precipitated after centrifugation, and dried to obtain NO 3 -LEu 0.09 Tb 0.91 H.

[0040] Take 0.3 mmol of NO 3 -LEu 0.09 Tb 0.91 H and 4.5 mmol Na 3 C 6 H 5 O 7 ·2H 2 O was dissolved in 80 mL of exhausted water, stirred evenly, then transferred to a 100 mL reaction kettle, reacted at 90 °C for 24 h, cooled to room temperature, washed and precipitated after centrifugation, and dried to obtain CA-LEu 0.09 Tb 0.91 H.

[0041] Weigh 0.1g of CA-LEu 0.09 Tb 0.91 H was dispersed in 80 mL of exhausted water, 5 g of ammonia water was added, stirred evenly, and then transferred to a 100 mL reaction kettle, reacted at 180 °C for 8 h, cooled to room temperature, and after centrifugati...

Embodiment 3

[0043] Take 0.5mmol of Tb(NO 3 ) 3 ·6H 2 O, 0.5 mmol of Eu(NO 3 ) 3 ·6H 2 O, 15 mmol NaNO 3 and 1.5mmol of HMT were dissolved in 80mL of exhausted water, stirred evenly and then transferred to a 100mL reaction kettle, reacted at 80°C for 15h, cooled to room temperature, washed and precipitated after centrifugation and dried to obtain NO 3 -LEu 0.5 Tb 0.5 H.

[0044] Take 0.3 mmol of NO 3 -LEu 0.5 Tb 0.5 H and 4 mmol Na 3 C 6 H 5 O 7 ·2H 2 O was dissolved in 80 mL of exhausted water, stirred evenly, then transferred to a 100 mL reaction kettle, reacted at 95 °C for 20 h, cooled to room temperature, washed and precipitated after centrifugation, and dried to obtain CA-LEu 0.5 Tb 0.5 H.

[0045] Weigh 0.1g of CA-LEu 0.5 Tb 0.5 H was dispersed in 80 mL of exhausted water, 4.8 g of ammonia water was added, stirred evenly, and then transferred to a 100 mL reaction kettle, reacted at 150 °C for 10 h, cooled to room temperature, and centrifuged, and the solid was wa...

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Abstract

Embodiments of the present application provide a method for preparing graphene quantum dot sensitized europium-terbium co-doped layered hydroxide and a product prepared therefrom, firstly preparing europium-terbium co-doped layered hydrogen with nitrate ions as guest anions Oxide, using its interlayer confinement space as a reactor, introduced graphene quantum dots through ion exchange, hydrothermal carbonization and other steps, the product structure is easy to control, and meets the requirements of practical applications, the obtained product has high luminous efficiency and excellent performance. . The present application provides a new method and new idea for the preparation and large-scale production of rare earth composite materials with excellent optical properties.

Description

technical field [0001] The application relates to the technical field of compound synthesis, in particular to a preparation method of graphene quantum dot sensitized europium terbium co-doped layered hydroxide and a product prepared therefrom. Background technique [0002] Layered rare earth hydroxide LRHs, as a two-dimensional inorganic hydroxide material, not only has interlayer ion exchangeability, but also has fluorescent properties. Therefore, it is widely used in high-performance magnetic materials, light-emitting devices, phosphors, catalysts, sensors, etc. It has important applications in fields such as bioimaging and drug delivery. The fluorescence properties of LRHs can be modulated by doping different kinds of rare earth elements and changing the doping ratio. However, in the laminate, the rare earth ions will coordinate with hydroxyl groups and water molecules, and the vibration of the O-H bond will greatly enhance the rare earth ions. The degree of non-radiativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y30/00B82Y40/00C01B32/205C01B32/21C01F17/10C01F17/224
CPCC09K11/7784B82Y20/00B82Y30/00B82Y40/00C01B32/205C01B32/21C01F17/10C01F17/224
Inventor 杨晓晶桑颂冯娉娉
Owner BEIJING NORMAL UNIVERSITY
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