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Magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles and application thereof for catalyzing reduction reaction of p-nitrophenol

A technology of nickel-aluminum hydrotalcite and nano-gold particles, which is applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, organic chemistry, etc., and can solve the cumbersome preparation process and the non-recyclability of precious metal nano-catalysts, etc. problems, to achieve the effect of uniform particle size distribution, low synthesis cost, and simple loading method

Inactive Publication Date: 2015-05-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these obtained noble metal nanocatalysts cannot be recycled, and the preparation process is cumbersome

Method used

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  • Magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles and application thereof for catalyzing reduction reaction of p-nitrophenol
  • Magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles and application thereof for catalyzing reduction reaction of p-nitrophenol
  • Magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles and application thereof for catalyzing reduction reaction of p-nitrophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Disperse 0.55 mmol of the magnetic nanoparticles of the oil phase in 1000 μl of chloroform to obtain a nanoparticle solution, dissolve 0.05 g of sodium dodecyl sulfonate in 12 ml of deionized water, and then add it to the obtained nanoparticle solution, Under the protection of ice bath, sonicate in an ultrasonic cell crusher for 15 minutes to obtain a nanoparticle emulsion, and then rotary steam at 60 °C for 15 minutes under vacuum conditions to obtain an oil-in-water nanoparticle solution;

[0029] b. Dissolve 0.01 g of sodium dodecyl sulfonate in 10 ml of deionized water, then add 200 μL of styrene, 50 μL of ethylene glycol dimethacrylate and 100 μL of hydroxyethyl methacrylate, and sonicate in an ultrasonic cell crusher 15 minutes;

[0030] c. After mixing the products obtained in steps a and b, add 0.01 g azobisisobutyl cyanide, react at 80°C for 10 hours; centrifuge after cooling, centrifuge at 9500 r / min for 25 minutes, and then centrifuge and wash 3 times, and...

Embodiment 2

[0036] a. Disperse 0.55 mmol of the magnetic nanoparticles of the oil phase in 1000 μl of chloroform to obtain a nanoparticle solution, dissolve 0.05 g of sodium dodecyl sulfonate in 12 ml of deionized water, and then add it to the obtained nanoparticle solution, Under the protection of ice bath, sonicate in an ultrasonic cell crusher for 15 minutes to obtain a nanoparticle emulsion, and then rotary steam at 60 °C for 15 minutes under vacuum conditions to obtain an oil-in-water nanoparticle solution;

[0037] b. Dissolve 0.01 g of sodium dodecyl sulfonate in 10 ml of deionized water, then add 200 μL of styrene, 50 μL of ethylene glycol dimethacrylate and 100 μL of hydroxyethyl methacrylate, and sonicate in an ultrasonic cell crusher 15 minutes;

[0038] c. After mixing the products obtained in steps a and b, add 0.01 g azobisisobutyl cyanide, react at 80°C for 10 hours; centrifuge after cooling, centrifuge at 9500 r / min for 25 minutes, and then centrifuge and wash 3 times, and...

Embodiment 3

[0043] a. Disperse 0.55 mmol of the magnetic nanoparticles of the oil phase in 1000 μl of chloroform to obtain a nanoparticle solution, dissolve 0.05 g of sodium dodecyl sulfonate in 12 ml of deionized water, and then add it to the obtained nanoparticle solution, Under the protection of ice bath, sonicate in an ultrasonic cell crusher for 15 minutes to obtain a nanoparticle emulsion, and then rotary steam at 60 °C for 15 minutes under vacuum conditions to obtain an oil-in-water nanoparticle solution;

[0044] b. Dissolve 0.01 g of sodium dodecyl sulfonate in 10 ml of deionized water, then add 200 μL of styrene, 50 μL of ethylene glycol dimethacrylate and 100 μL of hydroxyethyl methacrylate, and sonicate in an ultrasonic cell crusher 15 minutes;

[0045] c. Mix the products obtained in steps a and b, add 0.01 g of azobisisobutyl cyanide, and react at 80°C for 10 hours; after cooling, centrifuge, centrifuge at 10,000 r / min for 25 minutes, and then centrifuge and wash 3 times, an...

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Abstract

The invention discloses a magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles and application thereof for catalyzing reduction reaction of p-nitrophenol in the technical field of nanometer materials. The method comprises the following steps: by employing the emulsion polymerization technology, coating magnetic nanoparticles into a polymer, so that the nickel aluminum hydrotalcite is coated on the surface of a magnetic high polymer microsphere in situ by utilizing the solvothermal technique; and by taking sodium citrate as a protective agent, loading the gold nanoparticles on the surface of the magnetic nickel aluminum hydrotalcite through a chemical reduction method. The magnetic nickel aluminum hydrotalcite composite material loaded with gold nanoparticles which is good in dispersing property in a polar solvent and has the recovering function is obtained. The composite material has high catalytic activity when applied to catalytic p-nitrophenol reduction. The composite material has application significance in the field of catalyst preparation and synthesis, and the synthesis cost is relatively low.

Description

technical field [0001] The invention belongs to the technical field of nano-material preparation, in particular to a magnetic nickel-aluminum hydrotalcite composite material loaded with nano-gold particles and its application in catalyzing the reduction reaction of p-nitrophenol. technical background [0002] In the field of catalysis, with the development of nanotechnology, nano-gold catalysts have been studied by many scholars due to their application in catalyzing various chemical reactions. However, combining these noble metal nanomaterials with nanomaterials with different functions to form multifunctional integrated composite functional nanomaterials with functions such as catalysis, adsorption or magnetic properties at the same time has attracted more and more attention. This multifunctional integration has received increasing attention because of its great potential for applications in biomedicine, pollution treatment, and catalysis. [0003] In recent years, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C07C215/76C07C213/02
Inventor 汪乐余凌世攀
Owner BEIJING UNIV OF CHEM TECH
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