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Hollow ball granular chain of nano-polycrystalline noble-metal and its production

A precious metal, particle chain technology, applied in the field of nanoparticles, can solve the problems of lack of order and difficult manipulation of hollow spherical nanoparticles

Inactive Publication Date: 2007-01-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a nano polycrystalline precious metal gold, palladium or platinum hollow sphere particle chain and its preparation method, to overcome the shortcomings of the prior art that the hollow sphere nanoparticles are difficult to control and lack of order, and obtain precious metal Ordered chain-like structure of gold, palladium or platinum hollow sphere nanoparticles

Method used

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  • Hollow ball granular chain of nano-polycrystalline noble-metal and its production
  • Hollow ball granular chain of nano-polycrystalline noble-metal and its production
  • Hollow ball granular chain of nano-polycrystalline noble-metal and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of polycrystalline Au hollow sphere particle chains with an average size of 50 nanometers

[0028] First configure the precursor colloid solution A for preparing noble metal hollow ball chains. The steps are: under an inert atmosphere—nitrogen gas is used in this example, 200mg of PVP is ultrasonically dissolved in 20ml of water, and then 11.9mg of CoCl is weighed 2 ·6H 2 O dissolves into this solution. This solution is transferred in the three-neck flask of 100ml capacity, inserts the stirring piece of mechanical stirrer from the bottle mouth in the middle, nitrogen is led into from the next bottle mouth, and a dropping funnel is put on the other bottle mouth. The entire reaction system was placed in a uniform magnetic field of 200 mTesla. Hold for 15 minutes at a mechanical stirring speed of 1000 rpm. Another 5mg NaBH 4 Dissolve in 10ml of water and transfer quickly to the dropping funnel. Then within 1 minute this NaBH 4 The aqueous solut...

Embodiment 2

[0033] Example 2: Preparation of polycrystalline Pd hollow sphere particle chains with an average size of 50 nanometers

[0034] Configure palladium source solution D: weigh 88.66mg PdCl 2 , was dissolved in 10 ml of 1M HCl, neutralized to pH=7.0 with 1M KOH solution, and then diluted to 20 ml.

[0035]Using the same operation and method as in Example 1, the configured palladium source solution D was added dropwise to the colloidal precursor A used for the preparation of hollow ball chains, and mechanical stirring was continued for 30 minutes under an inert atmosphere to obtain a black colloidal solution . The purification steps are the same as in Example 1, and finally dissolved in 1 ml of absolute ethanol to form a black colloidal solution.

[0036] Sample testing and data processing methods are the same as in Example 1. Image 6 It is a transmission electron microscope photo of a single Pd hollow ball chain. From the photo, it can be seen that the Pd hollow ball particle...

Embodiment 3

[0037] Example 3: Preparation of polycrystalline Pt hollow sphere particle chains with an average size of 40 nanometers

[0038] Configure platinum source solution E: weigh 0.24g H 2 PtCl 6 ·6H 2 O was dissolved in 10ml of water, and 1M KOH solution was added dropwise to neutralize to pH=7.0, and then diluted to 20ml.

[0039] Using the same operation and method as in Example 1, the configured platinum source solution E was added dropwise to the colloidal precursor solution A used for the preparation of hollow ball chains, and mechanical stirring was continued for 30 minutes under an inert atmosphere to obtain a black colloidal solution . The purification method is the same as in Example 1, and finally dissolved in 1 ml of absolute ethanol to form a black colloidal solution.

[0040] Sample testing and data processing methods are the same as in Example 1. Figure 10 It is a transmission electron microscope photo of a single Pd hollow sphere chain. It can be seen from the ...

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Abstract

A chain of hollow nanoparticles made of polycrystal noble metal (Au, Pd, or Pt) is prepared through dissolving polyvinyl pyrrolidone in inertial gas and uniform magnetic field while stirring, adding hexahydrated cobalt chloride powder, dropping the aqueous solution of sodium bromohydride, adding the solution of AuCl3, PdCl6 or PtCl6 to obtain coarse product, and purifying.

Description

Technical field: [0001] The invention belongs to the technical field of nano particles, in particular to a nano polycrystalline precious metal gold, palladium or platinum hollow sphere particle chain and a preparation method thereof. Background technique: [0002] Noble metal nanoparticles have strong localized surface plasmon oscillation characteristics in the visible light band, which makes them have a very broad application prospect in biochemical sensing, biomarkers, nano waveguides, etc. In recent years, the research on noble metal nanoparticles has aroused more and more researchers' interest, especially the research on hollow nanoparticles of noble metals is changing with each passing day. application potential. For example, the United States "Science" (Science 298.2176-2179, 2002) reported the preparation technology of noble metal hollow spherical particles, that is, the technology of galvanic replacement reactions; German "Applied Chemistry" (Angew.Chem.Int.Ed.43.15...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 曾杰黄健柳王晓平侯建国
Owner UNIV OF SCI & TECH OF CHINA
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