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Preparation method and application of water-soluble blue fluorescence silicon quantum dot

A technology of silicon quantum dots and blue fluorescence, applied in the field of nano-luminescent materials and plant applications, to achieve good pH stability, promote plant chlorophyll synthesis and photosynthesis, and accelerate light capture and electron transfer efficiency

Active Publication Date: 2019-05-21
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how it can be used to improve plant chloroplast photosynthesis has not yet been reported.

Method used

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  • Preparation method and application of water-soluble blue fluorescence silicon quantum dot
  • Preparation method and application of water-soluble blue fluorescence silicon quantum dot
  • Preparation method and application of water-soluble blue fluorescence silicon quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Weigh 3.5g of sodium citrate and dissolve it in 120mL of ultrapure water to form a sodium citrate solution. Stir for 10 minutes while feeding nitrogen to remove oxygen in the sodium citrate solution.

[0063] (2) Add 30mL of 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane solution to the above sodium citrate solution, continue to stir for 30min and continue to feed nitrogen to form silicon quantum Spot the precursor solution.

[0064] (3) Add the silicon quantum dot precursor solution into the pressure-resistant tube, and react in an oil bath at 160° C. for 3 hours to form a silicon quantum dot solution.

[0065] (4) Use a 1kda dialysis bag to dialyze the silicon quantum dot solution in deionized water. The dialysis time is 12 hours, during which the water is changed 4 times to remove impurities in the solution and obtain a pure silicon quantum dot solution.

Embodiment 2 to Embodiment 17

[0067] Embodiment 2 to embodiment 17 can be operated according to the steps in embodiment 1, the difference is: the addition of sodium citrate, the first stirring time, the silane and consumption added in the sodium citrate solution, after adding silane The second stirring time, the reaction temperature, the reaction time, and the dialysis time of the silicon quantum dot precursor solution; the details are shown in Table 1. Wherein, the silicon quantum dot precursor solution in embodiment 2-embodiment 5 is to add in the pressure-resistant tube and react, and in embodiment 6-embodiment 17, the silicon quantum dot precursor solution is added in the polytetrafluoroethylene reactor , react in the oven by the reaction temperature in Table 1. Among them, silane: the molecular formula of 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane is C 10 h 27 N 3 o 3 The molecular formula of Si, and [3-(diethylamino)propyl]trimethoxysilane is C 10 h 25 NO 3 Si.

[0068] The re...

Embodiment 13

[0081] (1) Apply silicon quantum dots prepared in Example 13 in Table 1 to isolated chloroplasts to measure their impact on chloroplast photosynthesis, the specific steps are as follows:

[0082]The silicon quantum dots prepared in Example 13 were combined with the isolated Italian lettuce chloroplasts to form a chloroplast / silicon quantum complex, so that the concentrations of silicon quantum dots in the finally obtained 6 groups of chloroplast / silicon quantum complex solutions were 0, 10, 50, 100, 500 and 1000mg / L, the concentration of chloroplast is 10mg / L. Then, the effects of compounding silicon quantum dot solutions with different concentrations on the photosynthetic activity of isolated chlorophyll were respectively determined by Hill reaction.

[0083] The results of this experiment show that as the concentration of silicon quantum dots increases, the amount of change in the absorbance of DCPIP first increases and then decreases. When the concentration of silicon quant...

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Abstract

The invention relates to a preparation method and application of water-soluble blue fluorescence silicon quantum dot. The preparation method comprises the steps of taking silane as a silicon source, and preparing the water-soluble blue-fluorescence silicon quantum dot through the hydrothermal reaction between the silane and sodium citrate; the preparation method is easy to operate and low in cost.The silicon quantum dot prepared according to the method disclosed by the invention has high quantum efficiency, strong ultraviolet absorption, good monodispersity, good water solubility and pH stability, the photosynthesis of the chloroplast can be obviously improved after the silicon quantum dot is compounded with the chloroplast, thereby promoting the plant growth and the photosynthesis. The water-soluble blue fluorescence silicon quantum dot disclosed by the invention has the feature of enhancing the plant photosynthesis, can be used in the application to the plant photosynthesis and canbe mainly used in the application for preparing the plant nutrient solution.

Description

technical field [0001] The invention relates to a preparation method of water-soluble blue fluorescent silicon quantum dots and its application in plant photosynthesis, belonging to the field of nano-luminescent materials and plant applications. Background technique [0002] Compared with other new energy sources, solar energy is the most abundant, environmentally friendly and inexhaustible renewable energy on the earth. Therefore, the development of technologies to improve the conversion of solar energy into renewable resources needed by humans has broad prospects. Plants can convert solar energy into chemical energy through photosynthesis, and then fix CO 2 , Synthetic carbohydrates promote plant growth. The chloroplast contains the photoreaction center and is an important organelle in the plant photosynthesis system. However, the light source absorbed by chloroplasts in photosynthesis is limited to visible light. Generally, less than 10% of sunlight can meet the light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59B82Y20/00B82Y40/00A01N59/00A01P21/00C05G3/00
CPCA01N59/00B82Y20/00B82Y40/00C05G3/00C09K11/59
Inventor 雷炳富李艳娟张浩然刘应亮李唯董日月
Owner SOUTH CHINA AGRI UNIV
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