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Method for synthesizing noble metal superfine nanowire water phase and establishing noble metal nanopore membrane by self-precipitation thereof

A precious metal, ultra-fine nanotechnology, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems that have not been used to build precious metal nanoporous membranes, limitations, etc., to achieve wide applicability, save time, and low cost cost effect

Inactive Publication Date: 2011-01-05
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conditions such as the strong acid used for dealloying, the organic solvent or plasma in the process of removing the stencil, and the aging time of more than ten days limit the promotion of the above method.
Although the solution precipitation method has the advantages of convenient operation and easy thickness control, it has been widely used to obtain metal oxide, halide and hydroxide thin films, but so far this method has not been used to construct noble metal nanoporous membranes.

Method used

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  • Method for synthesizing noble metal superfine nanowire water phase and establishing noble metal nanopore membrane by self-precipitation thereof
  • Method for synthesizing noble metal superfine nanowire water phase and establishing noble metal nanopore membrane by self-precipitation thereof
  • Method for synthesizing noble metal superfine nanowire water phase and establishing noble metal nanopore membrane by self-precipitation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0075] Embodiment 1: the synthesis of gold ultrafine nanowire

[0076] Using TX-114 as a stabilizer and structure control agent, KBH 4 as a reducing agent. 0.05mmolHAuCl 4 and 25mg TX-114 were dissolved in 47ml Millipore ultrapure water and added to a sealed 50ml Erlenmeyer flask. After stirring for five minutes at 1000rpm in an ice bath, 3ml 100mM KBH was quickly injected into the solution with a syringe 4 Solution, continue to stir for 10 seconds, the color of the solution changes from bright yellow to brown, red and finally dark gray. After the reaction is completed, add 25mg TX-114 to the solution, mix well, centrifuge at 1500rpm at 60°C for 10 minutes, discard the supernatant, and redisperse the lower cloud point phase in Millipore ultrapure water to refill the corresponding precious metal Aqueous solutions / dispersions of nanowires. Observed by transmission electron microscope (TEM, H-7500, Hitachi) and high resolution transmission electron microscope (HRTEM, JEM-2100...

Embodiment 2

[0077] Embodiment 2: Synthesis of Pt ultrafine nanowires

[0078] Using TX-114 as a stabilizer and structure control agent, KBH 4 as a reducing agent. 0.05mmolH 2 PtCl 6 and 25mg TX-114 were dissolved in 48ml Millipore ultrapure water and added to a sealed 50ml Erlenmeyer flask. After stirring at 1000rpm in an ice bath for five minutes, quickly inject 2ml 100mM KBH into the solution with a syringe 4 solution, continue stirring for 10 seconds. After the reaction is completed, add 25mg TX-114 to the solution, mix well, centrifuge at 1500rpm at 60°C for 10 minutes, discard the supernatant, and redisperse the lower cloud point phase in Millipore ultrapure water to obtain a new solution / dispersion liquid. Observed by transmission electron microscope (TEM, H-7500, Hitachi) and high resolution transmission electron microscope (HRTEM, JEM-2100F, JEOL), and processed by image plus software, its diameter is 2.04±0.36nm. (Such as figure 2 , the left picture is the corresponding T...

Embodiment 3

[0079] Embodiment 3: Synthesis of Pd ultrafine nanowires

[0080] Using TX-114 as a stabilizer and structure control agent, KBH 4as a reducing agent. 0.05mmolPd(NO 3 ) 2 and 25mg TX-114 were dissolved in 49ml Millipore ultrapure water and added to a sealed 50ml Erlenmeyer flask. After stirring for five minutes at 1000rpm in an ice bath, 1ml 100mM KBH was quickly injected into the solution with a syringe 4 solution, continue stirring for 10 seconds. After the reaction is completed, add 25mg TX-114 to the solution, mix well, centrifuge at 1500rpm at 60°C for 10 minutes, discard the supernatant, and redisperse the lower cloud point phase in Millipore ultrapure water to obtain a new solution / dispersion . Observed by transmission electron microscope (TEM, H-7500, Hitachi) and high resolution transmission electron microscope (HRTEM, JEM-2100F, JEOL), and processed by image plus software, its diameter is 2.48±0.42nm. (Such as image 3 , the left picture is the corresponding TE...

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Abstract

The invention provides a method for synthesizing a noble metal (gold, palladium, platinum) nanowire and establishing a noble metal nanopore membrane by self-precipitation thereof. The method comprises the following steps of: adding a 0.05 percent (W / V) nonionic surfactant into 1 mmol.L<-1> solution of noble metal precursor (HAuCl4, H2PtCl6, Pd(NO3)2) and mixing the solution and the surfactant by stirring; stirring the mixture in ice bath for 5 to 10 minutes and adding potassium borohydride (or sodium borohydride) in an amount which is 6 times that of the HAuCl4 of the metal precursor, 4 timesthat of the H2PtCl6 and twice that of the Pd(NO3)2; stirring violently to fully reduce the metal precursor in the mixture so as to synthesize the metal superfine (less than or equal to 3 nanometers) netlike nanowire; adding the 0.05 percent (W / V) nonionic surfactant into synthesized nanowire dispersion liquid, mixing uniformly and centrifuging at the temperature of 60 DEG C for 10 minutes so as to separate and purify a nanomaterial; and adding 5mM of NaCl (additional NaCl does not need to be added into an Au nanowire) into the synthesized nanowire dispersion liquid and standing for 12 hours so as to obtain a corresponding noble metal nanopore membrane.

Description

technical field [0001] The present invention relates to a method for the aqueous phase synthesis of precious metal ultrafine nanowires and self-precipitation of ultrafine metal nanowires to construct noble metal nanoporous membranes, in particular to a method for constructing nanowires and nanoporous films suitable for the field of catalysis Background technique [0002] The shape-controllable synthesis of various nanostructures is a research hotspot in the field of material science, and the great potential of nanocatalysts in chemical production, pollution control, and energy conversion promotes this nanoboom. It is generally believed that the catalytic performance of nanomaterials strongly depends on the size and morphology of nanocatalysts. Because of their unique physical and chemical properties related to quantum confinement / small size benefits and outstanding catalytic performance, noble metal ultrafine nanowires have attracted more attention as catalysts. For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00
CPCB82B3/00B22F9/24C30B29/02B22F1/0025C30B7/14C30B29/60B22F1/0547
Inventor 刘景富刘睿于素娟江桂斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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