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A kind of biomass-supported nano metal catalyst and its preparation method and application

A nano-metal, supported technology, applied in the field of biomass-supported nano-metal catalyst and its preparation, can solve the problems of instability, easy aggregation of metal nano-particles, low metal nano-particle catalyst loading, etc. Easy recycling, small particle size effect

Active Publication Date: 2017-02-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can obtain supported metal nanoparticle catalysts with smaller particle sizes; however, the loading capacity of metal nanoparticle catalysts is small, unstable after recycling, and metal nanoparticles are easy to aggregate. the problem we are facing

Method used

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  • A kind of biomass-supported nano metal catalyst and its preparation method and application
  • A kind of biomass-supported nano metal catalyst and its preparation method and application
  • A kind of biomass-supported nano metal catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1: Preparation of MNPs@AOFC catalyst with a mass content of amidoxime group of 16.84%

[0067] Preparation of cyanoethyl bacterial cellulose:

[0068] Soak 40mL of nano bacterial cellulose (solid content is 0.9%, particle size is about 30nm, mass of bacterial cellulose is 0.36g) that has been ground with a grinding disc for 7h in 40mL of 1mol / L NaOH, then directly add 100mL In a round-bottomed flask, at room temperature with a stirring speed of 900rpm / min, 20mL of acrylonitrile monomer (16.12g) was added dropwise into the round-bottomed flask while stirring, and the reaction was completed after 12 hours of reaction, and the reaction in the round-bottomed flask was The final product was washed 3 times with ultrapure water, and the supernatant was removed by centrifugation to obtain 0.51 g of cyanoethyl bacterial cellulose.

[0069] Preparation of amidoxime functionalized bacterial cellulose:

[0070] Weigh 10g of hydroxylamine hydrochloride (NH 2 OHxHCl) solid...

Embodiment 2

[0074] Example 2: Preparation of MNPs@AOFC catalyst with a mass content of amidoxime group of 3.88%

[0075] Preparation of cyanoethyl bacterial cellulose:

[0076] Soak 40mL of nano-bacterial cellulose (solid content is 0.9%, particle size is about 30nm, mass of bacterial cellulose is 0.36g) that has been ground with a grinding disc in 40mL of 1mol / L NaOH for 0.5h, then directly add In a 100mL round-bottomed flask, 20mL of acrylonitrile monomer (16.12g) was added dropwise into the round-bottomed flask while stirring at a stirring rate of 900rpm / min at room temperature, and the reaction was completed after 12 hours of reaction. The reacted product was washed 3 times with ultrapure water, and the supernatant was removed by centrifugation to obtain 0.44 g of cyanoethyl bacterial cellulose.

[0077] Preparation of amidoxime-functionalized cellulose:

[0078] Weigh 10g of hydroxylamine hydrochloride (NH 2 OHxHCl) solid and 5.8g NaOH solid were added to a 100mL round bottom flas...

Embodiment 3

[0082] Example 3: Preparation of MNPs@AOFC catalyst with amidoxime group mass content of 13.64%

[0083] Preparation of cyanoethyl bacterial cellulose:

[0084] Soak 40mL of nano bacterial cellulose (solid content is 0.9%, particle size is about 30nm, mass of bacterial cellulose is 0.36g) that has been ground with a grinding disc for 7h in 40mL of 1mol / L NaOH, then directly add 100mL In a round-bottomed flask, at room temperature with a stirring speed of 900rpm / min, 20mL of acrylonitrile monomer (16.12g) was added dropwise into the round-bottomed flask while stirring, and the reaction was completed after 12 hours of reaction, and the reaction in the round-bottomed flask was The final product was washed 3 times with ultrapure water, and the supernatant was removed by centrifugation to obtain 0.47 g of cyanoethyl bacterial cellulose.

[0085] Preparation of amidoxime-functionalized cellulose:

[0086] Weigh 10g of hydroxylamine hydrochloride (NH 2 OHxHCl) solid and 5.8g NaOH so...

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Abstract

The invention provides a biomass load type nano-metal catalyst and a preparation method and application thereof. The catalyst is MNPs@AOFC, and the loading capacity of MNPs is 1.6-25.8 mg / g. The metal is a precious metal or CU, and the particle size of the metal nano particle is 3-60 nm. In amidoxime group functionalized cellulose, the mass content of the amidoxime group is 3.88-16.84%; the cellulose is bacterial cellulose. The AOFC carrier both serves as a reducing agent and a stabilizer, reaction is carried out for 2 hours under a hydrothermal condition to uniformly load the metal nano particles on the surface of the AOFC carrier, and amidoxime groups with different mass percents can be controlled to obtain the catalyst of the metal nano particles with different particle sizes. The catalyst has good stability, and the metal catalyst with a unit mass can continuously reduce more than 3500 times of p-nitrophenol. The catalyst can be applied to catalytic reduction reaction.

Description

technical field [0001] The invention belongs to the technical field of nano-metal catalyst preparation, and in particular relates to a biomass-loaded nano-metal catalyst and a preparation method and application thereof. Background technique [0002] Nano-metal catalysts have shown excellent performance in catalytic reactions and have played an important role in many industrial fields. Commonly used nano-metal catalysts include gold, silver, platinum, palladium, copper, etc. However, limited metal resources lead to an urgent need to develop highly efficient and reusable catalytic materials. And because the surface energy of the nano metal catalyst is large and the particle size is small, it is easy to aggregate and reduce the catalytic activity. In order to give full play to the performance of metal catalysts, most of the methods adopted are to load nano metal particles on the surface of various auxiliary materials. Therefore, the research on supporting nano-metal catalyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C07C215/76C07C213/02
Inventor 康宏亮陈美妍刘瑞刚黄勇
Owner INST OF CHEM CHINESE ACAD OF SCI