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Method for preparing triangular nano palladium slice

A nano-palladium and nano-silver flake technology is applied in the field of preparation of triangular nano-palladium flakes, can solve problems such as unfavorable large-scale production, triangular nano-palladium flakes with multiple impurities, etc., and achieves the effects of low cost, non-oxidative denaturation, and stable performance.

Inactive Publication Date: 2007-03-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the triangular nano-palladium sheets produced by this method have more impurities, and involve more raw materials and operating steps, especially requiring reflux equipment, which is not conducive to industrialized mass production

Method used

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  • Method for preparing triangular nano palladium slice

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Experimental program
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Effect test

Embodiment 1

[0010] Embodiment 1: the preparation method of the triangular nano palladium sheet shown in figure a, its steps are:

[0011] (1) 60 milliliters of ternary solution systems containing water (6wt%) / PVP (K30, 2.3wt%) / n-amyl alcohol (91.7wt%) were prepared in a covered reaction vessel;

[0012] (2) 3 ml of PdCl 2 Saturated ethanol solution was added to the system under stirring, and after stirring for 5 minutes, it was placed in a constant temperature box for heat treatment at 95°C for 48 hours;

[0013] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular nano-palladium palladium flakes of required size.

Embodiment 2

[0014] Embodiment 2: the preparation method of triangular nano palladium plate, its steps are:

[0015] (1) 60 milliliters of ternary solution systems containing water (1wt%) / PVP (K30, 29wt%) / n-amyl alcohol (70wt%) are prepared in a covered reaction vessel;

[0016] (2) 3 ml of PdCl 2 Add the saturated ethanol solution into the system under stirring, continue stirring for 30 minutes, and then put it into a constant temperature box for heat treatment at 100°C for 30 hours;

[0017] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular nano-palladium palladium flakes of required size.

Embodiment 3

[0018] Embodiment 3: the preparation method of triangular nano palladium plate, its steps are:

[0019] (1) 60 milliliters of ternary solution systems containing water (7wt%) / PVP (K30, 10wt%) / n-amyl alcohol (83wt%) are prepared in a covered reaction vessel;

[0020] (2) 3 ml of PdCl 2 Add the saturated ethanol solution into the system under stirring, continue to stir for 20 minutes, and then put it into a constant temperature box for heat treatment at 80°C for 24 hours;

[0021] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular nano-palladium palladium flakes of required size.

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Abstract

The present invention discloses a preparation method of trigonal nano palladium sheet. Said method includes the following steps: (1), preparing three-component solution system formed from (by wt% 1-7 wt% of water, 1-20 wt% of PVP and 70-98% of n-pentanol in a reaction container; (2), adding PdCl2 saturated alcohol solution into the above-mentioned system under the condition of continuous stirring, then placing the above-mentioned material into a constant temperature oven with 80-100deg.C to make heat treatment; and (3), centrifugalizing the above-mentioned reaction solution undergone the heat treatment so as to obtain the invented high-purity trigonal nano palladium sheet.

Description

1. Technical field [0001] The invention relates to a method for preparing metal nanomaterials, in particular to a method for preparing triangular nano palladium sheets. 2. Background technology [0002] The metal palladium plays an important role in many industrial applications. For example, it is the main catalyst for low-temperature reduction of automobile exhaust [see literature 1], Suzuki, Heck and Still coupling [see literature 2]. To maximize these applications of palladium, palladium nanoparticles with various morphologies were prepared by decomposing complexes of palladium and surfactants in the presence of surfactants or polymers. However, it is difficult to control the specific morphology of palladium in these preparation methods, so as to synthesize certain high-purity palladium nanoparticles with specific morphology [see Document 3]. A recently reported improved polyol reduction method successfully prepared triangular nano-palladium sheets with higher purity, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 章建辉刘淮涌王振林闵乃本
Owner NANJING UNIV
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