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Nickel-molybdenum alloy aerogel and method for preparing same

A technology of molybdenum alloy and airgel, which is applied in the fields of airgel preparation, chemical instruments and methods, colloid chemistry, etc., to achieve the effects of high porosity, large specific surface area, and controllable microstructure units

Inactive Publication Date: 2019-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there is no report to directly realize the preparation of metal alloy aerogels in the sol-gel process.

Method used

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  • Nickel-molybdenum alloy aerogel and method for preparing same
  • Nickel-molybdenum alloy aerogel and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Take nickel chloride hexahydrate (NiCl 2 ·6H 2 O), molybdenum pentachloride (MoCl 5 ), polyacrylic acid (PAA), propylene oxide (PO), and absolute ethanol are the reaction raw materials.

[0022] 2) Prepare nickel salt and molybdenum pentachloride precursor solution: under the condition of constant temperature water bath at 60°C, stir and mix 0.475g nickel chloride, 0.136g molybdenum pentachloride and 5ml absolute ethanol to dissolve them in anhydrous In ethanol, the concentration of nickel chloride is 0.4M, and the concentration of molybdenum pentachloride is 0.1M.

[0023] 3) Add 0.3g of polyacrylic acid (PAA) into the prepared precursor solution under the condition of constant temperature water bath at 60°C and stir evenly, then add 2ml of propylene oxide and stir and mix evenly, so that the polyacrylic acid and propylene oxide are completely dissolved In the precursor solution, a sol is obtained.

[0024] 4) Prepare reduction treatment solution: weigh 0.189g o...

Embodiment 2

[0030] 1) Take nickel nitrate hexahydrate (NiNO 3 ·6H 2 O), molybdenum pentachloride (MoCl 5 ), polyacrylic acid (PAA), propylene oxide (PO), and absolute ethanol are the reaction raw materials.

[0031] 2) Prepare nickel salt and molybdenum pentachloride precursor solution: under the condition of constant temperature water bath at 60°C, stir and mix 0.582g nickel nitrate, 0.136g molybdenum pentachloride and 5ml absolute ethanol to dissolve them in absolute ethanol , wherein the concentration of nickel nitrate is 0.4M, and the concentration of molybdenum pentachloride is 0.1M.

[0032] 3) Add 0.35g of polyacrylic acid (PAA) into the prepared precursor solution under the condition of constant temperature water bath at 60°C and stir evenly, then add 2.5ml of propylene oxide and stir to mix evenly, so that the polyacrylic acid and propylene oxide are completely Dissolved in the precursor solution to obtain a sol.

[0033] 4) Prepare reduction treatment solution: weigh 0.189g ...

Embodiment 3

[0039] 1) Take nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O), molybdenum pentachloride (MoCl5), polyacrylic acid (PAA), propylene oxide (PO), and absolute ethanol are the reaction raw materials.

[0040] 2) Prepare nickel salt and molybdenum pentachloride precursor solution: under the condition of constant temperature water bath at 60°C, stir and mix 0.498g nickel acetate, 0.136g molybdenum pentachloride and 5ml absolute ethanol to dissolve them in absolute ethanol Among them, the concentration of nickel acetate is 0.4M, and the concentration of molybdenum pentachloride is 0.1M.

[0041] 3) Add 0.3g of polyacrylic acid (PAA) into the prepared precursor solution under the condition of constant temperature water bath at 60°C and stir evenly, then add 2ml of propylene oxide and stir and mix evenly, so that the polyacrylic acid and propylene oxide are completely dissolved In the precursor solution, a sol is obtained.

[0042] 4) Prepare reduction treatment solution: weig...

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Abstract

The invention discloses nickel-molybdenum alloy aerogel and a method for preparing the same. The method for preparing the nickel-molybdenum alloy aerogel includes 1), utilizing inorganic salt of nickel as a nickel source; 2), utilizing molybdenum pentachloride as a molybdenum source; 3), utilizing absolute ethyl alcohol as a solvent; 4), utilizing polyacrylic acid as an additive; 5), utilizing propylene epoxide as a gel accelerator; 6), adding sodium borohydride-ethyl alcohol solution into nickel-molybdenum gel to carry out prereduction on nickel-molybdenum; 7), carrying out supercritical ethyl alcohol drying on prereduced gel to obtain the nickel-molybdenum alloy aerogel. The nickel-molybdenum alloy aerogel prepared by the aid of the method comprises crystalline-state nickel-molybdenum alloy. A molar ratio of nickel:molybdenum is an optional proportion ranging from 10:1 to 1:10, nickel-molybdenum alloy nano-particles are stacked to form the nickel-molybdenum alloy aerogel, and the particle sizes range from 5 nm to 100 nm; the specific surface area of the nickel-molybdenum alloy aerogel ranges from 10 m<2> / g to 120 m<2> / g, and the density of the nickel-molybdenum alloy aerogel ranges from 0.02 g / cm<3> to 0.5 g / cm<3>. The nickel-molybdenum alloy aerogel and the method have the advantages that raw materials for the nickel-molybdenum alloy aerogel are easily available, and the method includes simple processes; the nickel-molybdenum alloy aerogel prepared by the aid of the method can be used for different types of gas-phase catalytic reaction.

Description

technical field [0001] The invention belongs to the technical field of airgel material preparation, and in particular relates to a nickel-molybdenum alloy airgel and a preparation method thereof. Background technique [0002] Airgel is a solid material with a nanoporous network structure. Due to its inherent large specific surface area and developed pore structure, these characteristics make the activity and selectivity of airgel catalysts much higher than conventional catalysts; at the same time It also has excellent thermal stability, which can effectively reduce the occurrence of side reactions. In a large number of studies, scientists have found that using airgel as a catalyst can not only reduce the use of raw materials, but also greatly improve its activity, selectivity and lifespan, and has very good catalytic properties. [0003] Airgel can be used as an excellent catalyst carrier in various catalytic reactions, especially as a carrier of various transition metal ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 陈建洄支明佳洪樟连
Owner ZHEJIANG UNIV
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