Long-afterglow nanomaterial based on ion doping as well as preparation method and application of long-afterglow nanomaterial

Abstract

The invention discloses an afterglow nanomaterial and a preparation method of a long-afterglow nanomaterial with sizes and spectrum adjusted on basis of ion doping. An expression formula of the nanomaterial is Zn(1+x)Ga(2-2x)GexO4:0.75%Cr, wherein x is larger than or equal to 0 and smaller than or equal to 0.5, and the particle size is 7 nm-80 nm. According to the preparation method, a zinc nitrate solution, a gallium nitrate solution, a sodium germinate solution and a chromium nitrate solution in specific proportions are mixed together, ammonia water is added rapidly while the mixture is stirred, and the pH of the mixed solution is adjusted to 10; then, the mixed solution is transferred to a high-temperature hydrothermal kettle and reacts at the temperature of 120 DEG C, and the afterglow nanomaterial is obtained. The method is simple and easy to implement, severe experiment conditions and complicated large instruments are not required, synthesized nanoparticles are uniform in sizes and have a good water-phase dispersion property and high afterglow strength, the afterglow time can reach 10 h, and accordingly, the synthesized nanoparticles are suitable for improving the physical and chemical properties of the long-afterglow nanomaterial.

Description

technical field [0001] The invention relates to a long afterglow nano material and a preparation method of the long afterglow nano material based on ion doping for size and spectrum control, belonging to the field of luminescent materials. Background technique [0002] Long afterglow refers to the optical phenomenon that the luminescence can still be maintained for several seconds to several hours after the excitation light source is removed. Long afterglow materials can store the energy of the excitation light, and slowly release the stored energy in the form of radiation after the excitation light source is removed. Compared with traditional fluorescent materials, long afterglow materials have ultra-long luminous lifetime, good photostability and chemical stability. Due to their high luminous intensity and adjustable color, long-lasting materials are widely used in display, lighting, and bioimaging. For example, long afterglow materials are widely used in fire emergency ...

AI Technical Summary

Problems solved by technology

Due to the small proportion of ultraviolet rays in sunlight, traditional long-lasting materials cannot be excited by sunlight, while excitation light sources such as ultraviolet rays and X-rays consume a lot of energy and have great safety hazards, thus limiting long-lasting materials. Applications in Lighting

In addition, ultraviolet rays, X-rays and γ-rays not only cause serious photodamage to biological tissues, but also have limited tissue penetration ability, thus limiting the application of long-lasting materials in biological imaging. Therefore, the development of long-lasting nanomaterials Size-tuning methods and enhancing the efficiency of long-lasting nanomaterials excited by visible light are very important to promote the application of long-lasting materials in the fields of display, lighting and bioimaging.

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