Preparation method of silver nano particles and method for facilitating germination of cucumber seeds and growth and development of seedlings with silver nano particles

A silver nanoparticle and nanoparticle technology, which is applied in the field of nanomaterial preparation and performance research, can solve the problem of the influence of cucumber seed germination, which has not yet been reported, and achieves easy large-scale production, low requirements for reaction conditions, and large-scale production. production effect

Inactive Publication Date: 2013-09-18
TONGHUA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been some studies on the application of nanotechnology in soaking seeds of cro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Measure 20 mL at an ambient temperature of 15°C, 0.1 mol L -1 AgNO 3 Aqueous solution, add 0.2 g PVP powder under stirring and continue stirring until completely dissolved. Measure 20 mL, 0.1 mol·L -1 The α-alanine aqueous solution was added to the above solution under stirring, then the stirring was stopped, and the reaction system was left to stand.

[0047] (2) After standing for 10 minutes, the reaction system gradually turned into a dark brown optically transparent solution, indicating that small-sized nanoparticles had formed at this time. The solution was centrifuged at 1000 rpm / min for 10 minutes with a high-speed centrifuge, and the light yellow supernatant was poured back into the reaction vessel, and silver nanoparticles with a size of about 20 nanometers were obtained at the bottom of the centrifuge tube.

[0048] (3) The supernatant liquid obtained from the first centrifugation was left to stand for about 30 minutes and then transformed into a dark b...

Embodiment 2

[0059] (1) Measure 20 mL at an ambient temperature of 15°C, 0.1 mol L -1 AgNO 3 Aqueous solution, add 0.1 g PVP powder under stirring state and continue stirring until completely dissolved. Measure 20 mL, 0.1 mol·L -1 The α-alanine aqueous solution was added to the above solution under stirring, then the stirring was stopped, and the reaction system was left to stand.

[0060] (2) After standing for 10 minutes, the reaction system gradually turned into a dark brown optically transparent solution, indicating that small-sized nanoparticles had formed at this time. The solution was centrifuged at 1000 rpm / min for 10 minutes with a high-speed centrifuge, and the light yellow supernatant was poured back into the reaction vessel, and silver nanoparticles with a size of about 20 nanometers were obtained at the bottom of the centrifuge tube.

[0061] (3) The supernatant liquid obtained from the first centrifugation was left to stand for about 30 minutes and then transformed into a ...

Embodiment 3

[0077] (1) Measure 20 mL at an ambient temperature of 25°C, 0.1 mol L -1 AgNO 3 Aqueous solution, add 0.2 g PVP powder under stirring and continue stirring until completely dissolved. Measure 20 mL, 0.1 mol·L -1 The α-alanine aqueous solution was added to the above solution under stirring, then the stirring was stopped, and the reaction system was left to stand.

[0078] (2) After standing for 5 minutes, the reaction system gradually turned into a dark brown optically transparent solution, indicating that small-sized nanoparticles had formed at this time. The solution was centrifuged at 1000 rpm / min for 10 minutes with a high-speed centrifuge, and the light yellow supernatant was poured back into the reaction vessel, and silver nanoparticles with a size of about 20 nanometers were obtained at the bottom of the centrifuge tube.

[0079] (3) The supernatant liquid obtained from the first centrifugation is left to stand for about 15 minutes and then transformed into a dark bro...

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Abstract

The invention belongs to the technical field of nano material preparation and performance study, and discloses a preparation method of silver nano particles and a method for facilitating germination of cucumber seeds and growth and development of seedlings with the silver nano particles. The preparation method comprises the following steps that an AgNO3 aqueous solution is taken; PVP (Polyvinyl Pyrrolidone) is added; an amino acid aqueous solution which is isometric with the AgNO3 aqueous solution and has reducibility is added after PVP is dissolved completely; when a color of a reaction system graduates into brown and is optically transparent, the nano particles are generated and are smaller in dimension; centrifugal treatment is performed; an obtained supernatant is recollected into an initial reaction container; a precipitate obtained at the bottom of a centrifugal tube is stored in deionized water; and an Ag nano particle solution is obtained. The silver nano particles are prepared by taking amino acid as a reducing agent, so that the silver nano particles have good biocompatibility. PVP is taken as a dispersing agent for preventing aggregation of the nano particles. A requirement of the whole preparation on reaction conditions is not high; scale production is easy to realize; and the provided nano particles can be applied in agricultural production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and performance research, namely a preparation method of silver nanoparticles and a method for promoting cucumber seed germination and seedling growth and development. Background technique [0002] In the past two decades, nanoscience and nanotechnology have received extensive attention and developed rapidly. Among various nanomaterials, silver nanoparticles have been a research hotspot. This is because silver nanoparticles not only have the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect of ordinary nanoparticles, but also as a member of noble metals, it has unique optical, electrical and catalytic properties, which can be Widely used as catalysts, battery electrodes, low-temperature thermal and conductive materials, etc. In addition, another feature of silver nanoparticles that has attracted much attention is its strong bacterici...

Claims

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Application Information

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IPC IPC(8): B22F9/24A01C1/00G01N21/78G01N21/31
Inventor 夏广清董丽红朱俊义章亚男
Owner TONGHUA NORMAL UNIV
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