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Method and application for green synthesis of nano platinum by using lotus aqueous extract

A technology of green synthesis and lotus flower extract, which is applied in the field of nano-platinum, can solve the problems that nanoparticles are not suitable for health care and beauty applications, high cost, adsorption of chemical reagents and dangerous by-products, etc., to achieve inhibition of tyrosinase activity and low cost The effect of low cost and simple production steps

Pending Publication Date: 2022-02-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these methods have some disadvantages, such as high cost, or the use of harmful chemical reagents as blocking and reducing agents
[0007] In addition, residual unreacted chemical reagents and hazardous by-products are likely to be adsorbed on the surface of nanoparticles
Therefore, nanoparticles produced using existing methods are not suitable for biomedical, health and beauty applications

Method used

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  • Method and application for green synthesis of nano platinum by using lotus aqueous extract
  • Method and application for green synthesis of nano platinum by using lotus aqueous extract
  • Method and application for green synthesis of nano platinum by using lotus aqueous extract

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Experimental program
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Effect test

Embodiment 1

[0056] (1) Take the dried lotus flower powder, mix it with ultrapure water according to the mass ratio of 1:10 to obtain a mixed solution, and ultrasonicate at 0°C for 30 minutes;

[0057](2) Centrifuge at 8000 rpm for 10 minutes, take the supernatant, and freeze-dry to obtain the lotus extract dry powder;

[0058] (3) Weigh the lotus extract obtained in step (2), dissolve it in water at a ratio of 1:100 (w:v), and filter to obtain a lotus extract.

[0059] (4) Take 1 ml of the extract solution and add 0.001 mol of chloroplatinic acid, stir vigorously for 30 minutes, the reaction mixture turns from yellow to black, indicating the formation of platinum nanoparticles.

[0060] (5) Centrifuge the nano-platinum solution obtained in step (4) at 12,000 rpm for 20 minutes, wash the precipitate twice with pure water and then dissolve it in pure water to obtain the nano-platinum solution.

Embodiment 2

[0062] (1) Take the dried lotus flower powder, mix it with ultrapure water according to the mass ratio of 1:20 to obtain a mixed solution, and ultrasonicate at 30°C for 2 hours;

[0063] (2) Centrifuge at 10,000 rpm for 15 minutes, take the supernatant, and freeze-dry to obtain the lotus extract dry powder;

[0064] (3) Weigh the lotus extract obtained in step (2), dissolve it in water at a ratio of 2:100 (w:v), and filter to obtain the lotus extract.

[0065] (4) Take 2 ml of the extract solution and add 0.01 mol of chloroplatinic acid, stir vigorously for 1 hour, the reaction mixture turns from yellow to black, indicating the formation of nano-platinum.

[0066] (5) Centrifuge the nano-platinum solution obtained in step (4) at 12,000 rpm for 20 minutes, wash the precipitate twice with pure water and then dissolve it in pure water to obtain the nano-platinum solution.

Embodiment 3

[0068] (1) Take the dried lotus flower powder, mix it with ultrapure water according to the mass ratio of 1:50 to obtain a mixed solution, and ultrasonicate at 60°C for 4 hours;

[0069] (2) Centrifuge at 12,000 rpm for 20 minutes, take the supernatant, and freeze-dry to obtain the lotus extract dry powder;

[0070] (3) Weighing the lotus extract obtained in step (2), dissolving it in water according to 5:100 (w:v), and filtering to obtain the lotus extract;

[0071] (4) Take 3 ml of the extract solution and add 0.05 mol of chloroplatinic acid, stir vigorously for 2 hours, the reaction mixture turns from yellow to black, indicating the formation of nano-platinum.

[0072] (5) Centrifuge the nano-platinum solution obtained in step (4) at 12,000 rpm for 20 minutes, wash the precipitate twice with pure water and then dissolve it in pure water to obtain the nano-platinum solution.

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Abstract

The invention discloses a method for green synthesis of nano platinum by using a lotus aqueous extract. The preparation raw materials comprise lotus and chloroplatinic acid. The preparation method comprises the following steps: adding dried lotus flower powder into ultrapure water, soaking, filtering, concentrating, drying to obtain a lotus flower extract, and mixing with chloroplatinic acid for reaction to obtain the nano platinum particles. The nano lotus platinum prepared by the preparation method provided by the invention is safe, simple, pollution-free, low in cost and high in biological activity. According to the invention, nano platinum generated by reduction of lotus flower has antioxidant ability, can scavenge free radicals, promote secretion of collagen and maintain skin elasticity, further has an anti-aging effect, and also can inhibit the activity of tyrosinase to achieve a whitening effect.

Description

technical field [0001] The invention relates to the technical field of nano-platinum, in particular to a method and application for green synthesis of nano-platinum by using lotus water extract. Background technique [0002] Nanoparticles are solid structures up to 100 nanometers in size and can be used in fields such as catalysis, optoelectronics, sensing, imaging, and gene and drug delivery. Among nanoparticles, platinum nanoparticles are widely used in the biological field because of their catalytic activity and safety. At present, conventional organic nanoparticles are mainly synthesized by chemical and physical methods, such as chemical reduction, thermal decomposition, sol-gel, laser ablation, etc. [0003] For example, the Chinese patent application number is: CN202110417723.1, which discloses a preparation method of a nano-platinum catalyst for the hydrogenation reaction of cinnamaldehyde. [0004] The above-mentioned patent records the following technical solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/054A61K8/19A61Q19/02A61Q19/08B82Y5/00B82Y30/00
CPCB22F9/24A61K8/19A61Q19/02A61Q19/08B82Y5/00B82Y30/00A61K2800/413A61K2800/84
Inventor 吴丽芳张义森王军陈雪
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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