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Method and device for preparing palladium and alloy nanocrystals thereof

An alloy nanocrystal and palladium nanotechnology, which is applied in the field of preparation of palladium and its alloy nanocrystals, can solve the problems of poor repeatability, harsh reaction conditions, cumbersome steps, etc. Effect

Pending Publication Date: 2021-10-08
海南深远海新能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the above classic representative synthetic methods have given great inspiration and encouragement to the industry, there are still shortcomings such as cumbersome steps in the synthetic process, poor repeatability and harsh reaction conditions.

Method used

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  • Method and device for preparing palladium and alloy nanocrystals thereof
  • Method and device for preparing palladium and alloy nanocrystals thereof
  • Method and device for preparing palladium and alloy nanocrystals thereof

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preparation example Construction

[0036] The invention provides a method for preparing palladium and its alloy nanocrystals, which can flexibly prepare gold nanoparticles, gold nanorods, gold nanowires and gold nanosheets by adjusting the concentration of chloroauric acid. refer to Figure 1a , Figure 1aIt is a schematic diagram of the processing flow of the preparation method of palladium and its alloy nanocrystals of the present invention. Such as Figure 1a Shown, the preparation method of palladium and alloy nanocrystal thereof comprises the steps:

[0037] Step 101, add deionized water, preset solution and polyvinylpyrrolidone into the reaction kettle, and uniformly generate a reaction solution through ultrasonic vibration.

[0038] Wherein, the preset solution includes one of sodium iodide, sodium bromide, potassium iodide and potassium bromide.

[0039] In one implementation manner, the capacity of the reactor may be 50 mL, the mass of deionized water may be 36 g, the mass of the preset solution may b...

Embodiment 1

[0071] Preparation of ultra-long palladium nanowires: Dissolve 18-58mg of sodium chloropalladate, 0.5-2g of potassium iodide and 1-5g of polyvinylpyrrolidone in 10-40mL of deionized water respectively, transfer them to a high-pressure stainless steel reaction vessel, and place them in air-dried In the box, the reaction temperature is set at 160-200° C., the reaction time is 1-24 hours, and ultra-long palladium nanowires are generated through multiple times of centrifugation and washing with acetone.

[0072] The generated ultra-long palladium nanowires can refer to Figure 1b , Figure 1b SEM image and embedded TEM image of the ultralong palladium nanowire generated in Example 1.

Embodiment 2

[0074] Preparation of ultra-long palladium-gold alloy nanowires: disperse 1 to 10 mL of ultra-long palladium nanowires in Example 1 in 50 to 200 mg of polyvinylpyrrolidone (55000) aqueous solution, add 10 to 100 μL of 0.01 to 1 mM three Hydrochloroauric acid reacts in an oil bath, setting the reaction temperature at 50-100° C., and the reaction time at 1-5 hours. Through repeated centrifugation and washing with water and ethanol, ultra-long palladium nanowires are generated.

[0075] The generated ultra-long palladium-gold alloy nanowires can refer to figure 2 , figure 2 It is the TEM image of the ultralong palladium-gold nanowire generated in Example 2.

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Abstract

The invention discloses a preparation method and device of palladium and alloy nanocrystals thereof.The preparation method comprises the steps: adding deionized water, a preset solution and polyvinylpyrrolidone into a reaction kettle, and generating a reaction solution through uniform ultrasonic concussion, wherein the preset solution comprises one of sodium iodide, sodium bromide, potassium iodide and potassium bromide; when a first mass of sodium chloropalladate is added into the reaction solution, generating an ultra-long palladium nanowire under the reaction conditions of high temperature and high pressure; when ascorbic acid and a second mass of sodium chloropalladate are added into the reaction solution, generating palladium nano cubes and palladium nano rods; and when ascorbic acid and a third mass of sodium chloropalladate are added into the reaction solution, generating the palladium nano cubes. Compared with a synthesis method in the prior art, the method has the advantages of simple treatment steps, simplicity in operation and easiness in repetition.

Description

technical field [0001] The invention relates to the technical field of multidisciplinary solution synthesis, in particular to a method and device for preparing palladium and its alloy nanocrystals. Background technique [0002] Due to the special tunable properties of noble metal nanocrystals, they have potential applications in the fields of catalysis, photonics, electronics, biosensing, and biomedical research, so the controllability of their crystal facet morphology has attracted extensive attention. Noble metal palladium nanocrystals have extremely strong catalytic ability in organic or inorganic reactions of hydrogenation and dehydrogenation, but the cost of their use has always been the main obstacle limiting their industrialization. Reducing the preparation cost of noble metal palladium nanocrystals and improving the catalytic efficiency have become the focus of researchers. [0003] In the past few decades, there have been many ways to synthesize noble metal catalys...

Claims

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Application Information

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IPC IPC(8): B22F9/24C22C1/04C22C5/04
CPCB22F9/24C22C5/04C22C1/0466B22F2009/245B22F2301/25C22C2200/04
Inventor 田新龙邓培林沈义俊
Owner 海南深远海新能源科技有限公司