US 12,576,396 B2Granted

Polynorbornene/carbon black-cross-linked three-dimensional network-immobilized copper/gold (PNBI/CB-Cu/Au) nanocatalyst, and preparation method and use thereof

AssigneeHubei Engineering University

InventorsLei Zhu, Biao Han, Bojie Li, Yaoyao Zhang, Weishuang Li

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Abstract

The present disclosure belongs to the technical field of catalyst preparation, and provides a polynorbornene/carbon black-cross-linked three-dimensional network-immobilized bimetallic copper/gold (PNBI/CB-Cu/Au) nanocatalyst, and a preparation method and use thereof. Metallic copper and gold both exist in a form of nanoparticles in the catalyst and are uniformly dispersed, and further enhancing a catalytic performance. Moreover, the carrier is a polynorbornene/carbon black-cross-linked three-dimensional network, and a relative content of free hydroxyl groups in the catalyst is controlled by changing a monomer ratio to adjust a hydrophilic-lipophilic balance value of the catalyst, adapting to a reaction of an organic phase with an aqueous phase. Furthermore, the catalyst is insoluble in conventional solvents, and has a desirable effect in immobilizing nanoscale metallic copper, prolonging a service life of the catalyst.

Claims17

Dependent claims

A polynorbornene/carbon black-cross-linked three-dimensional network-immobilized bimetallic copper/gold (PNBI/CB-Cu/Au) nanocatalyst, comprising a polynorbornene/carbon black-cross-linked three-dimensional network carrier, and gold nanoparticles and copper nanoparticles that are immobilized on the polynorbornene/carbon black-cross-linked three-dimensional network carrier;

wherein
the gold nanoparticles and the copper nanoparticles have a molar ratio of 1:1;
the gold nanoparticles and the copper nanoparticles in the PNBI/CB-Cu/Au nanocatalyst each have a relative content of 0.20 mmol/g to 0.25 mmol/g;
an active ingredient of the PNBI/CB-Cu/Au nanocatalyst is the copper nanoparticles;
the gold nanoparticles disperse the copper nanoparticles evenly and prevents the copper nanoparticles from agglomerating;
and
the polynorbornene/carbon black-cross-linked three-dimensional network carrier is a three-dimensional network formed by conducting copolymerization on three different norbornene monomers to obtain polynorbornene and cross-linking the polynorbornene with carbon black;
wherein the three different norbornene monomers have structures shown in Formula 1 to Formula 3, respectively:

5 more elements

Dependencies are inferred from the claim text.