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Method for preparing palladium nano-particles by plant biomass reduction method

A technology of palladium nanoparticles and plant biomass, which is applied in the field of preparing palladium nanoparticles by plant biomass reduction method, achieving the effects of good dispersion, stability and simple process

Inactive Publication Date: 2009-12-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many studies on the preparation of gold and silver nanoparticles by plant biomass reduction method, but there are few reports on the preparation of palladium nanoparticles by this method.

Method used

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  • Method for preparing palladium nano-particles by plant biomass reduction method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 2g of dry powder of camphor leaves, add 100mL of water, keep for 5min after boiling, and filter the resulting filtrate, which is the aqueous extract of camphor with a concentration of 20.0g / L. Take 25mL of Cinnamomum camphora aqueous extract and 25mL of palladium chloride solution (0.01mol / L) to react in a 100mL Erlenmeyer flask, and control the reaction temperature to 30°C. After reacting 48h, observe gained palladium sol with transmission electron microscope (TEM), observation result (see figure 1 ) shows that the obtained palladium nanoparticles are nearly spherical, uniform in size, most of the particle diameters are distributed in the range of 2.0-4.5nm, and the average particle diameter is 3.2nm.

Embodiment 2

[0021] Adopt 25mL of Cinnamomum camphora aqueous extract in embodiment 1, react in 100mL Erlenmeyer flask with 25mL palladium chloride solution (0.006mol / L), control reaction temperature is 30 ℃, the gained palladium nanoparticles after reacting 60h are nearly Spherical, most of the particle size distribution is 2.5-5.5nm, and the average particle size is 4.0nm.

Embodiment 3

[0023] Adopt 25mL of Cinnamomum camphora aqueous extract in embodiment 1, react in 100mL Erlenmeyer flask with 25mL palladium chloride solution (0.002mol / L), control reaction temperature is 30 ℃, gained palladium nanoparticles after reaction 70h are nearly Spherical, most of the particle size distribution is 4.5-8.0nm, and the average particle size is 6.0nm.

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Abstract

The invention relates to a method for preparing palladium nano-particles by a plant biomass reduction method, which relates to metal nano-particles. The invention provides the method for preparing the palladium nano-particles by the plant biomass reduction method. The method comprises the steps of: preparing a water extract of plant leaves; preparing a palladium chloride solution; and mixing and reacting the water extract of the plant leaves with the palladium chloride solution of equal volume to obtain the palladium nano-particles. The method has simple process, and does not need to add other chemical reagents except for the palladium chloride; and the prepared palladium nano-particles are mainly subsphaeroidal, have the average grain diameter of between 2 and 10nm, and have excellent dispersivity and stability in aqueous solutions.

Description

technical field [0001] The invention relates to a metal nanoparticle, in particular to a method for preparing palladium nanoparticle by using a plant biomass reduction method. Background technique [0002] Due to its unique optical and electrical properties, small size, surface effect, and unique biological affinity, palladium nanoparticles have shown important application value in the fields of catalysis, sensors, and biomedicine. The preparation methods of palladium nanoparticles are mainly based on physical and chemical methods. Although there are many studies on these two methods at home and abroad, and the technology is relatively mature, they have high production costs, harsh reaction conditions and easy pollution of the environment. and other shortcomings. Such as using a different chemical reducing agent NaBH 4 (Langmuir, 2000, 16, 2457-2463), N 2 h 4 (Langmuir, 2001, 17, 4701-4703), polyethylene glycol (J. Mol. Catal. A, 2005, 229, 7-12), vitamin C (Chem. Mater....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 李清彪杨欣王文塔王惠璇林丽芹黄加乐林文爽王慧孙道华王远鹏
Owner XIAMEN UNIV
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