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Novel nickel/sodium alginate inorganic/organic hybrid material and preparation method and application thereof

A technology of sodium alginate and organic hybridization, applied in the direction of organic chemistry, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the complex preparation process, catalyst dispersion, activity and stability There are still problems to be improved to achieve the effect of simple preparation process, inhibition of agglomeration and loss, and environmental friendliness

Inactive Publication Date: 2016-09-21
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the existing sodium alginate catalyst is relatively complicated, and the dispersibility, activity and stability of the obtained catalyst need to be improved

Method used

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  • Novel nickel/sodium alginate inorganic/organic hybrid material and preparation method and application thereof
  • Novel nickel/sodium alginate inorganic/organic hybrid material and preparation method and application thereof
  • Novel nickel/sodium alginate inorganic/organic hybrid material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare the material as follows:

[0036] a. At room temperature, add 2g of sodium alginate powder into 98mL of deionized water to prepare a 2wt% sodium alginate solution, and keep stirring for 12 hours to ensure that the sodium alginate is fully dissolved;

[0037] b. At room temperature, weigh 2.37g NiCl 2 ·6H 2 O in 50mL water, prepare 0.2M NiCl 2 Aqueous solution, dissolved evenly for later use;

[0038] c. Use a syringe to add the sodium alginate aqueous solution drop by drop to NiCl with magnetic stirring 2 In the aqueous solution, cross-link and solidify at room temperature for 12 hours, then perform solvent exchange with 25%, 50% and 100% ethanol solutions in sequence, each exchange time is 6 hours, and finally store the gel balls in ethanol for later use;

[0039] d. Prepare a sodium borohydride solution with a solvent of ethanol and a concentration of 0.26M. Take 40mL of the solution, place the above-mentioned gel balls in the solution for reduction, the r...

Embodiment 2

[0048] Example 2: Preparation and application of nickel / sodium alginate hybrid material.

[0049] The preparation process of the nickel / sodium alginate hybrid material includes steps a, b, c, and d. Wherein, steps a, c and d are correspondingly the same as a, c and d in embodiment 1, the difference is that NiCl 2 The concentration of the aqueous solution is 0.1M, NiCl 2 ·6H 2 O dosage is 1.18g.

[0050] Applications of nickel / sodium alginate hybrid materials are as follows:

[0051] The hydrogenation reaction of styrene was carried out in a 100mL Parr 4598HPHT stainless steel autoclave with a stirring and heating system. The specific experimental process was as follows: 40mL of ethanol, 0.36g of catalyst, and 42mmol of styrene were sequentially added to the stainless steel autoclave, and the autoclave Seal and check the airtightness, and fill with hydrogen for 3 times to replace the air in the kettle. Reaction conditions: pressure 2MPa, temperature 100°C, rotation speed 3...

Embodiment 3

[0052] Example 3: Preparation and application of nickel / sodium alginate hybrid material.

[0053] The preparation process of the nickel / sodium alginate hybrid material includes steps a, b, c, and d. Wherein, steps a, c and d are correspondingly the same as a, c and d in embodiment 1, the difference is that NiCl 2 The concentration of the aqueous solution is 0.3M, NiCl 2 ·6H 2 O dosage is 3.56g.

[0054] Applications of nickel / sodium alginate hybrid materials are as follows:

[0055] The hydrogenation reaction of styrene was carried out in a 100mL Parr 4598HPHT stainless steel autoclave with a stirring and heating system. The specific experimental process was as follows: 40mL of ethanol, 0.36g of catalyst, and 42mmol of styrene were sequentially added to the stainless steel autoclave, and the autoclave Seal and check the airtightness, and fill with hydrogen for 3 times to replace the air in the kettle. Reaction conditions: pressure 2MPa, temperature 100°C, rotation speed 3...

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Abstract

The invention provides a novel nickel / sodium alginate inorganic / organic hybrid material and a preparation method and application thereof. The preparation method includes the steps that 1, a sodium alginate solution is prepared; 2, a NiCl2 aqueous solution with the concentration being 0.05-1.0 M is prepared; 3, the sodium alginate aqueous solution is dropwise added to the NiCl2 aqueous solution in a stirring state, crossing and curing are conducted at the normal temperature, and gel beads are obtained; then the gel beads are preserved in ethyl alcohol for use through solvent exchange; 4, the gel beads are placed in a sodium borohydride solution for reduction, an obtained sample is subjected to suction filtration and washing and activation treatment, and the nickel / sodium alginate inorganic / organic hybrid material is obtained. Nickel nanoparticles in the prepared nickel / sodium alginate hybrid material display better dispersity and a smaller particle size, high action force between nickel and sodium alginate inhibits agglomeration and losing of nickel particles, and a catalyst can have good catalytic activity and stability.

Description

technical field [0001] The invention relates to the technical field of a sodium alginate hybrid material, specifically a novel nickel / sodium alginate hybrid material, and discusses the mechanism of action of the two, material characterization and application. Background technique [0002] Sodium alginate is a natural polysaccharide, which is composed of L-mannuronic acid (M unit) and D-guluronic acid (G unit) connected by 1,4-glycosidic bonds and composed of different proportions of GM, MM and A linear two-segment copolymer composed of GG segments widely exists in brown algae. The preparation process of the existing sodium alginate catalyst is relatively complicated, and the dispersibility, activity and stability of the obtained catalyst need to be improved. Contents of the invention [0003] The object of the present invention is to provide a novel nickel / sodium alginate inorganic / organic hybrid material and its preparation method and application. The nickel nanoparticle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J23/755C07C5/03C07C15/073
CPCB01J23/755B01J31/069B01J2231/645C07C5/03C07C2531/06C07C15/073
Inventor 白国义乔贤亮牛立博
Owner HEBEI UNIVERSITY
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