Graphene-based composite material with surface coated by mesoporous silica and loaded with noble metal nanoparticles, as well as preparation method and application of graphene-based composite material

A technology of mesoporous silica and nanoparticles, applied in the field of preparation of nanocomposite materials, can solve the problems of hindering the mass transfer process of substrates and products, masking the active sites of catalytic reactions, unfavorable catalytic reactions, etc. The effect of repeated use, convenient enrichment and recovery, and broad application prospects
CN102909005AActive Publication Date: 2013-02-06TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2013-02-06

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Abstract

The invention discloses a graphene-based composite material with surface coated by mesoporous silica and loaded with noble metal nanoparticles, and a preparation method of the graphene-based composite material. The preparation method comprises the following steps of: loading noble metal precursors on the surface of oxidized graphene by the deposition-precipitation method, so as obtain the oxidized graphene loaded with the noble metal precursors; coating the surface of the oxidized graphene located with the noble metal precursors by a silica material with a mesoporous structure through the sol-gel method in the presence of a surface active agent and a silicon source, so as to obtain an original composite material; and reducing the original composite material to obtain the composite material. The preparation method is mild in condition and universal in application; products can be prepared as mass; the distance between laboratory investigation and industrial application can be effectively reduced; and the composite material can be used as a catalyst.
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Description

technical field

[0001] The invention belongs to the field of preparation of nanocomposite materials, and in particular relates to a graphene-based composite material whose surface is coated with mesoporous silicon dioxide and loaded with noble metal nanoparticles, as well as its preparation method and application. Background technique

[0002] Graphene is a sp 2 Two-dimensional monoatomic layer materials formed by hexagonal arrangement of hybridized carbon atoms have attracted extensive attention due to their excellent electron mobility, thermal conductivity, and high specific surface area. Graphene is widely used as a catalyst carrier and has shown excellent performance in fields such as electrocatalysis, photocatalysis, and thermal catalysis, mainly due to its high electron mobility and high specific surface area. Especially in the field of thermal catalysis, both theoretical and experimental studies have demonstrated that graphene can greatly enhance the catalytic perfor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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