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Dual-waveband fluorescent light conversion powder for agricultural greenhouse film and preparation method of powder

A light-converting powder and dual-band technology, which is applied in botany equipment and methods, chemical instruments and methods, applications, etc., can solve the problems of short light stability time, high cost, and only single-wavelength emission, and achieve light stability time The effect of long, simple preparation method

Active Publication Date: 2021-02-05
天津赛维阳光新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the complex preparation method of the light conversion agent in the prior art, the cost is high, the light stabilization time is short, and the problem of only single-wavelength emission is provided by the present invention. A new type of fluorescent light-converting powder for agriculture. The light-converting powder has the advantages of blue + red dual-band emission, simple preparation method, long light stability time, and low cost.

Method used

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  • Dual-waveband fluorescent light conversion powder for agricultural greenhouse film and preparation method of powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: UV to red + blue Mg 6 Eu 1 Dy 1 (HO) 16 CO 3 Phosphor.

[0018] A solution: Na 2 CO 3 (3mmol)+NaOH(7mmol)+6ml water

[0019] Solution B: Mg(NO 3 ) 2 (6mmol)+Eu(NO 3 ) 3 (1mmol)+Dy(NO 3 ) 3 (1 mmol) + 10 ml water.

[0020] Solution C: 20ml of water. Under rapid stirring, A and B were added dropwise to the C solution to obtain a white precipitate. The solution pH=10 was controlled with NaOH. After the dropwise addition, the reaction was continued for 3 hours. The reactant was separated by filtration, rinsed and dried to obtain a white powder. Under the irradiation of 365nm ultraviolet lamp, it emits blue+red fluorescence.

Embodiment 2

[0021] Embodiment 2. UV to red+blue Mg 6 (Y 1.8 Eu 0.1 Dy 0.1 )(HO) 16 CO 3 Phosphor.

[0022] A solution: Na 2 CO 3 (3mmol)+NaOH(7mmol)+6ml water

[0023] Solution B: Mg(NO 3 ) 2 (6mmol)+Y(NO 3 ) 3 (1.8mol)+Eu(NO 3 ) 3 (0.1mmol)+Dy(NO 3 ) 3 (0.1 mmol) + 10 ml water.

[0024] Solution C: 20ml of water. Under rapid stirring, A and B were added dropwise to the C solution to obtain a white precipitate. The solution pH=10 was controlled with NaOH. After the dropwise addition, the reaction was continued for 3 hours. The reactant was separated by filtration, rinsed and dried to obtain a white powder. Under 200-400nm ultraviolet irradiation, it emits red + blue fluorescence.

Embodiment 3

[0025] Embodiment 3. UV to red+blue Mg 6 (La 1.7 Eu 0.2 Dy 0.1 )(HO) 16 CO 3 Phosphor.

[0026] A solution: Na 2 CO 3 (3mmol)+NaOH(7mmol)+6ml water

[0027] Solution B: Mg(NO 3 ) 2 (6mmol)+La(NO 3 ) 3 (1.7mol)+Eu(NO 3 ) 3 (0.2mmol)+Dy(NO 3 ) 3 (0.1 mmol) + 10 ml water.

[0028] Solution C: 20ml of water. Under rapid stirring, A and B were added dropwise to the C solution to obtain a white precipitate. The solution pH=10 was controlled with NaOH. After the dropwise addition, the reaction was continued for 3 hours. The reactant was separated by filtration, rinsed and dried to obtain a white powder. Under the irradiation of 365nm ultraviolet lamp, it emits red + blue fluorescence.

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Abstract

The invention relates to a dual-waveband fluorescent light conversion material which is a rare earth inorganic compound and can absorb ultraviolet rays in natural light and efficiently convert the ultraviolet rays into red light and blue light. The fluorescent material is used as an additive to prepare an agricultural fluorescent light conversion film which can be used for a plastic greenhouse. The agricultural polymer film disclosed by the invention can absorb ultraviolet rays of 200-400 nanometers in natural light, the absorptivity reaches 98% or above, and the absorbed ultraviolet rays areconverted into red light and blue light required by plants, so that the yield and quality of crops are improved, and the growth period is shortened.

Description

technical field [0001] The invention belongs to the technical field of light-converting agricultural shed film, and in particular relates to a dual-band ultraviolet-converting red+blue agricultural fluorescent light-converting agent and a preparation method thereof. Background technique [0002] Sunlight is a necessary condition for plant growth, but not all wavelengths of sunlight are beneficial to plant growth. The effect of light on plants is closely related to the spectral composition. Every plant has its specific optimum growth spectrum, however, the sunlight spectrum that hits the ground is not the optimum spectrum for crop growth. In the solar spectrum, the 200-400 nanometer ultraviolet rays are harmful to plant growth, the green light in the visible light is completely reflected by the leaves and wasted, and the blue light and red light in the solar spectrum are beneficial to plant growth. Therefore, it is of great academic value and practical significance to study...

Claims

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Application Information

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IPC IPC(8): C09K11/78A01G9/14
CPCC09K11/7783A01G9/1438Y02A40/25
Inventor 崔明斌
Owner 天津赛维阳光新材料有限公司
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