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Preparation method of mesoporous silica nano-fertilizer and product thereof

A technology of mesoporous silica and silica, applied in fertilizer mixtures, layered/coated fertilizers, solid/semi-solid fertilizers, etc., to achieve high loading efficiency, prevent early leakage, and facilitate plant absorption

Pending Publication Date: 2020-07-14
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experimental data on the preparation of nanofertilizers using MSNs is rarely reported.

Method used

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  • Preparation method of mesoporous silica nano-fertilizer and product thereof
  • Preparation method of mesoporous silica nano-fertilizer and product thereof
  • Preparation method of mesoporous silica nano-fertilizer and product thereof

Examples

Experimental program
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Effect test

Embodiment

[0056] (1) Preparation of mesoporous silica nanomaterials

[0057] Weigh 2.968g of CTAB, put it in a glass bottle, add 100mL of Milli-Q water adjusted to pH 10.0 with ammonium hydroxide in advance, stir magnetically and heat to 80°C. After 30 min, the mixture was stirred at room temperature down to 30°C, and 1.86mLTEOS was added dropwise. The reaction solution was stirred for 24 hours, then transferred to an oven, and kept at a constant temperature of 80°C for 24 hours. Then the reaction solution product was filtered through a nitrocellulose membrane with a pore size of 0.1 μm (Whatman TM ), washed 3 times with absolute ethanol to remove excess template CTAB and other chemical substances on the outside, and finally obtained white MSNs containing templates, which were vacuum-dried and stored for later use.

[0058] (2) Preparation of thiol-modified mesoporous silica

[0059] Weigh 200 mg of MSNs containing the template, dissolve it in 200 mL of absolute ethanol, and disperse...

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Abstract

The invention relates to a preparation method of a mesoporous silica nano-fertilizer and a product thereof. The preparation method comprises the following steps: preparing a mesoporous silica nano (MSNs) material, preparing sulfydryl-modified nano mesoporous silica which is used for encapsulating urea, and blocking sulfydryl-modified silica nano mesopores by using 1-decanethiol, thereby preparingthe mesoporous silica nano fertilizer. According to the invention, MSNs with high fertilizer loading efficiency and suitable diameter and pore size are synthesized, plants can absorb MSNs with suitable diameter and pore size, functional group modification is carried out on the surfaces of nanoparticles, and urea fertilizer loading is carried out. Meanwhile, proper gating molecules are used for covering mesoporous inlets, and the fertilizer is sealed in the mesopores so as to prevent early leakage of the fertilizer. Glutathione is used as an excitation factor to react with gating molecules, andthe release speed of the fertilizer is adjusted and controlled.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing a mesoporous silica nanometer fertilizer and a product thereof. Background technique [0002] Modern agricultural production relies heavily on chemical fertilizers and pesticides to provide sufficient nutrients for crop growth, control various pests and diseases, and remove weeds to ensure the healthy growth of crops, thereby ensuring and increasing crop yields. However, the long-term and extensive use of agrochemical products has changed the soil structure, resulting in a significant reduction in the content of organic matter in the soil, resulting in the loss of farmland nutrients and the decline of soil fertility. The reason for the excessive use of agrochemical products is that, in addition to the failure of agricultural producers to apply them rationally and scientifically, another main reason is that the absorption and utilization of traditional a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/90C05G5/12C05G5/30C05C9/00
CPCC05C9/00C05C9/005C05G3/00
Inventor 孙德权谢江辉陆新华李普旺胡会刚
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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