Eu < 2 + >-doped inorganic nanoparticles as well as preparation method and application thereof

An inorganic nanoparticle and nanoparticle technology, applied in the fields of nanotechnology, nanotechnology, nano-optics, etc., can solve the problems of reducing crop yield and quality, white pollution of ecological environment, refractory microbial degradation, etc., and achieve low environmental pollution and dispersibility. Good, promote plant growth effect

Pending Publication Date: 2021-12-24
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Most of the agricultural films used in light conversion films are polymer plastics, such as polyolefin (PO), low-density polyethylene (LDPE), polyvinyl chloride (PVC), etc. These polymer plastics are difficult to pass light under natural conditions. It can be degraded by heat and heat, and it is difficult for microorganisms to degrade, leading to "white pollution" of the agricultural ecological environment, causing soil quality to decline, inhibiting crop growth and development, and reducing crop yield and quality

Method used

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  • Eu &lt; 2 + &gt;-doped inorganic nanoparticles as well as preparation method and application thereof
  • Eu &lt; 2 + &gt;-doped inorganic nanoparticles as well as preparation method and application thereof
  • Eu &lt; 2 + &gt;-doped inorganic nanoparticles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a kind of Eu 2+ A method for preparing doped inorganic nanoparticles, comprising the following steps:

[0039] S1, prepare citric acid aqueous solution and fluorine source aqueous solution;

[0040] Weigh 1.6g (8.3mmol) of citric acid (Cit) in a 100mL three-necked flask, measure 24mL of distilled water into the three-necked flask, stir and dissolve, and after the dissolution is complete, use ammonia water to adjust the pH to 6-7 to obtain an aqueous solution of citric acid;

[0041] Weigh 0.4070g (11mmol) NH 4 F was dissolved in 2 mL of distilled water to obtain a fluorine source aqueous solution;

[0042] S2, preparation of Eu 2+ Doping with inorganic nanoparticles;

[0043] 1.2044g (5.1mmol) Ca(NO 3 ) 2 4H 2 O, 0.0983g (0.268mmol) EuCl 3 ·6H 2 O in a beaker, add 2 mL of distilled water, stir evenly with a glass rod, add to the above-mentioned three-necked flask with citric acid aqueous solution, heat and stir in a water bath, keep the water bath at a constant t...

Embodiment 2

[0047] a kind of Eu 2+ The preparation method of doping inorganic nanoparticles is basically the same as the method of Example 1, except that, in S1, the consumption of citric acid is 1.6g (8.3mmol); The reaction time is 24h.

Embodiment 3

[0049] a kind of Eu 2+ The preparation method of doping inorganic nanoparticles is basically the same as the method in Example 1, except that, in S1, the consumption of citric acid is 3.2g (16.6mmol); in S2, the reaction in the autoclave is transferred to The time is 16h.

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Abstract

The invention provides Eu < 2 + >-doped inorganic nanoparticles as well as a preparation method and application thereof, and Eu < 2 + >-doped inorganic nanoparticles Cit / CaF2: Eu < 2 + > are prepared by carrying out hydrothermal reaction on soluble Ca salt, soluble Eu salt, citric acid (Cit) and a fluorine source in a hydrothermal reaction kettle. Wherein the citric acid coats the surfaces of the nanoparticles in a chemical bonding manner, and shows a relatively strong reduction characteristic under a closed high-pressure reaction condition, so that Eu < 3 + > is reduced into Eu < 2 + >. The nanoparticles can emit very strong blue fluorescence of 400-450 nm as a light conversion agent. The polylactic acid and the Cit / CaF2: Eu < 2 + > nanoparticles are compounded to prepare the light conversion film, the light conversion film has the maximum emission peak near 449 nm and can be excited by ultraviolet light of 300-400 nm, the fluorescence emission range is 375-560 nm, and the preparation process is simple.

Description

technical field [0001] The invention relates to the technical field of light conversion materials preparation, in particular to a Eu 2+ Doped inorganic nanoparticles and methods for their preparation and use. Background technique [0002] With the development of modern agriculture, how to efficiently utilize solar energy has become the focus of current agricultural science and technology research. Light energy conversion film (light conversion film) has been developed to meet the needs of modern high-efficiency and high-quality agriculture. The light conversion film is to add a light conversion agent to the agricultural film. Under the action of the light conversion agent, this film not only retains the light transmittance of the ordinary agricultural film, but also can absorb the harmful or useless ultraviolet light, Yellow and green light are transformed into red light and blue light required for photosynthesis, thereby enhancing plant photosynthesis, promoting plant grow...

Claims

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Application Information

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IPC IPC(8): C09K11/61B82Y20/00B82Y40/00C08J5/18C08L67/04C08K3/16
CPCC09K11/7733B82Y20/00B82Y40/00C08J5/18C08J2367/04C08K3/16
Inventor 宋立美薛亚琦高建华
Owner XIAN UNVERSITY OF ARTS & SCI
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