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A green preparation method and application of copper nanoparticles based on citrus pectin

A technology of copper nano and pectin, which is applied in the field of green preparation of copper nanoparticles, can solve problems such as few reports, achieve short reaction time, prevent agglomeration, and improve monodispersity

Active Publication Date: 2022-05-31
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of AgNPs and AuNPs from pectin has been reported, there are few reports on the preparation of CuNPs from pectin.

Method used

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  • A green preparation method and application of copper nanoparticles based on citrus pectin
  • A green preparation method and application of copper nanoparticles based on citrus pectin
  • A green preparation method and application of copper nanoparticles based on citrus pectin

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preparation example Construction

[0025] A method for preparing copper nanoparticles based on citrus pectin of the present invention, comprising the following steps:

[0026] Copper chloride is used as a copper precursor, alkali-soluble pectin as a stabilizer and reducing agent, ascorbic acid is also used as a reducing agent, and copper nanoparticles are synthesized by microwave assisted, and nano copper powder is obtained by high-speed centrifugal method. To overcome the shortcomings of the prior art, to provide a green environmental protection, low toxicity, low cost and high yield based on citrus pectin copper nanoparticle preparation method and its application.

Embodiment 1

[0028] A method for preparing copper nanoparticles based on citrus pectin of the present embodiment, comprising the following steps:

[0029] (1) Take 10mL 0.015mol / L CuCl 2 Place in a 50 mL Erlenmeyer flask;

[0030] (2) Add 10mL of 0.2% (w / v) pectin solution containing 5g / L sodium hydroxide and stir well;

[0031] (3) Add 2mL 10% (w / v) of ascorbic acid and stir well;

[0032] (4) Put the reaction reagent into a microwave oven with a power of 320W and heat it for 3min;

[0033] (5) After the obtained flocculent liquid and its precipitate are bottled and left for 6h, the filtration treatment is carried out to filter the obtained Shangqing night;

[0034] (6) Take the filtered liquid high-speed centrifugation, centrifugal conditions of 10000rpm, centrifugal time of 10min, remove the supernatant, add equal volume distilled water sonication, repeat centrifugation three times;

[0035] (7) The product of step (6) was dried overnight at 50 °C, and the resulting reddish-brown powder was...

Embodiment 2

[0039] The present embodiment is substantially the same as Example 1, the difference is that the concentration of sodium hydroxide (step (2)) is different, respectively, 0g / L, 1g / L, 2g / L, 3g / L, 4g / L, 6 g / L.

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Abstract

The invention discloses a method for preparing copper nanoparticles based on citrus pectin, which belongs to the field of nanomaterials. The present invention adopts copper chloride as copper precursor, pectin dissolved in sodium hydroxide as stabilizer and reducing agent, and ascorbic acid is also used as reducing agent at the same time, through simple microwave-assisted synthesis of copper nanoparticles, a reddish-brown copper nano-liquid is obtained. Finally, powdered copper nanoparticles are obtained by high-speed centrifugation, washing and drying. Under ultraviolet-visible light, its maximum absorption peak is 590nm. At the same time, the invention also provides an application of copper nanoparticles of citrus pectin in the antibacterial field. The copper nanoparticles in the present invention have the advantages of good dispersibility, high safety performance and the like. The production process of the invention is simple and environmentally friendly, and has broad prospects in the field of antibacterial medicine.

Description

Technical field [0001] The present invention belongs to the field of nanomaterial technology, specifically relates to a green preparation method of copper nanoparticles based on citrus pectin and its application. Background [0002] Nanoparticles refer to those particles that exhibit different properties from the bulk material due to the reduction of particle size, and their particle size is generally less than 100 nm, which is a typical mesoscopic system with a series of novel physicochemical properties. It has a wide range of applications in the fields of medicine, biotechnology, optics and catalysis. Among the many metal nanoparticles, copper nanoparticles (CuNPs) have received more and more attention due to their low cost, excellent optics, medicine, catalysis, electrical conductivity, thermal conductivity and antibacterial properties, but their easy clumping and oxidation characteristics have become the bottleneck of preparation. Over the past few decades of research, many e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/054A01N59/20A01P1/00A01P3/00B82Y30/00B82Y40/00
CPCB22F9/24A01N59/20B82Y30/00B82Y40/00B22F1/054Y02A50/30
Inventor 李培骏梁金叶单杨黄盈彭明芳卢慧李东阳陶丽君
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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