A hydroxide matrix long afterglow luminescent nanorod and its preparation method
A long afterglow luminescence, hydroxide technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of long afterglow nanomaterials, etc., and achieve the effect of stable morphology and uniform distribution
Active Publication Date: 2021-12-24
GUANGDONG UNIV OF TECH
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Problems solved by technology
[0003] The most widely studied and applied long-lasting nanoprobe systems include sulfide systems, alkaline earth aluminate systems, sulfur oxide systems, titanate systems, gallate systems, and silicate systems. High-temperature sintering is mainly used. In the preparation of long-lasting nanomaterials, sol-gel and hydrothermal methods are mainly used. It is difficult to prepare long-lasting nanomaterials with controllable morphology and uniform distribution.
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Embodiment 1
[0033] Weigh lanthanum nitrate hexahydrate 0.01mol La(NO 3 ) 3 ·6H 2 O: 4.33g, add 100mL ultrapure water, stir vigorously for 10min; use NH 3 ·H 2 O (25wt.%) to adjust the pH of the above mixed solution to 10, stir vigorously in a water bath at 90°C for 2h, then cool naturally to room temperature, wash by centrifugation, and wash three times with deionized water and absolute ethanol successively; The sample is dried in an oven at 80°C for 12 hours, and the dried sample is slightly ground; the composition can be obtained as La(OH) 3 Long afterglow luminescent nanorods, the product emits a blue-cyan long afterglow of 467nm after excitation by 320nm light, and the afterglow decays exponentially.
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Abstract
The invention discloses a hydroxide-based long-lasting luminous nanorod and a preparation method thereof. The chemical formula of the hydroxide-based long-lasting luminous nanorod is La(OH) 3 . The preparation process of the long-afterglow luminescent nanorod is simple and controllable, the shape is stable, the distribution is uniform, and the water solubility is good. Different from the previous doped long afterglow materials such as oxides, sulfides, nitrides, etc., the present invention discovered the long afterglow phenomenon for the first time in the case of lanthanum hydroxide matrix without doping ions; and the preparation method is different from Conventionally, long afterglow materials need to be sintered to obtain long afterglow luminescent materials without sintering for the first time in the present invention.
Description
technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a hydroxide matrix long-lasting luminous nanorod and a preparation method thereof. Background technique [0002] Long afterglow luminescent materials are referred to as long afterglow materials, also known as luminous materials. It is a kind of light that emits long-term light in the visible or near-infrared region under wide-source excitation (visible light, ultraviolet light, X-rays, γ-rays, electron beams, etc.), and stores part of the obtained light energy. Finally, it can last for a few seconds, hours or even days, so it is also called "green light source material". Because it can use sunlight or light storage to emit light at night or in the dark, it is widely used in night emergency instructions, optoelectronic devices or components, instrument displays, low lighting, home decoration and national defense military (such as night travel maps) and many other as...
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IPC IPC(8): C09K11/78
CPCC09K11/77
Inventor 窦晓静李杨康茹练惠旺
Owner GUANGDONG UNIV OF TECH