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Method for preparing bimetallic nanometer alloy composite material by taking graphene as carrier

A bimetallic nano-composite material technology, applied in the field of nano-inorganic materials, can solve the problems of complex preparation process, difficult to control particle size, etc., and achieve the effects of simple process, low cost and low impurity content.

Active Publication Date: 2013-04-03
安徽皖瑞能源科技有限公司
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Problems solved by technology

In 2010, Nancy N.Kariuki et al. reported the preparation method of carbon-loaded Pd-Cu nano-alloy composites (Chem.Mater.2010, 22, 4144-4152). In this method, nano-alloy particles must be prepared first and then loaded onto carbon However, the preparation process is more complicated in the process of preparing alloy particles, and it is not easy to control the size of the particles

Method used

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  • Method for preparing bimetallic nanometer alloy composite material by taking graphene as carrier
  • Method for preparing bimetallic nanometer alloy composite material by taking graphene as carrier
  • Method for preparing bimetallic nanometer alloy composite material by taking graphene as carrier

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Embodiment 1

[0025] Weigh 0.282mmol PdCl 2 (AR) and 0.282mmol Co(C 4 h 6 o 4 )·4H 2 O(AR), after mixing, add to the suspension containing 0.3g graphene oxide, stir magnetically at 80-90°C for 1 hour, then slowly add 50mL ammonia water (AR) to adjust the pH>10, then add 35mL of 85% mass concentration Hydrazine hydrate solution, reacted for 4 hours under magnetic stirring, after the reaction, centrifuged to obtain a black solid, washed with deionized water until neutral, and then vacuum-dried at 60°C to obtain a black flaky solid, after grinding the black flaky solid Obtain uniform black powder;

[0026] Spread the black powder on a quartz boat, place it in the constant temperature zone of the tube furnace, raise the temperature to 300°C under nitrogen atmosphere (flow rate: 600mL / min), feed hydrogen gas (flow rate: 100mL / min), reduce and calcinate for 120 Minutes, cooled to room temperature under the protection of nitrogen (flow 600mL / min); then heated up to 500°C under nitrogen atmosp...

Embodiment 2

[0028] The preparation method of the present embodiment is the same as embodiment 1, and the difference is that the noble metal N salt is Pd(C 2 h 3 o 2 ) 2 (AR), 124 mg of nano-Pd-Co / graphene composite material (molar ratio Pd:Co=1:1) was obtained, and the loading rate of nano-Pd-Co particles was 37.5%.

Embodiment 3

[0030] The preparation method of the present embodiment is the same as that of embodiment 1, and the difference is that the noble metal N salt is Pd(NO 3 ) 2 (AR), 134 mg of nano-Pd-Co / graphene composite material (molar ratio Pt:Co=1:1) was obtained, and the loading rate of nano-Pd-Co particles was 37.5%.

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Abstract

The invention discloses a method for preparing a bimetallic nanometer alloy composite material by taking graphene as a carrier. The method comprises the following steps of: by taking a precious metal N salt (N=Pd, Pt) and a transition metal M salt (M=Co, Ni and Cu) as precursors and taking graphene oxide as a matrix, reducing the components by employing a reducing agent; and finally, washing, filtering, drying, grinding and roasting to obtain the high-purity graphene bimetallic nanometer composite material. The composite material has high nanoparticle load capacity, stable structure, high uniformity and high dispersing property, has high binding force with the graphene and is high-efficiency in preparation method, low in cost, simple in process and suitable for industrial production. The composite material can be widely applied to the fields of magnetic targeting materials, various catalysts, electromagnetic shielding wave-absorbing materials, super-capacitor electrode materials and other related function materials.

Description

1. Technical field [0001] The invention relates to a method for preparing a composite material with graphene as a carrier, in particular to a method for preparing a bimetallic nano-alloy composite material with graphene as a carrier, and belongs to the technical field of nano-inorganic materials. 2. Background technology [0002] The size of nanomaterials is at the nanoscale (1-100nm), between microscopic and macroscopic, with quantum size effects, small size effects, surface and interface effects, macroscopic quantum tunneling effects, etc., which are different from general materials, such as melting point, magnetic , Optical, thermal conductivity, electrical conductivity, etc., are often different from the properties of the substance in the overall state, and are widely used in various industrial fields such as metallurgy, coating, material manufacturing, and fine chemicals. In recent years, more and more researchers have begun to use noble metal Pt and Pd nanomaterials as...

Claims

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Application Information

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IPC IPC(8): B01J23/89
Inventor 姚运金林欣燕冯乙巳徐川
Owner 安徽皖瑞能源科技有限公司
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