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Preparation method and application of a metal cluster photostable catalyst

A technology of light stability and metal clusters, which is applied in the field of preparation of metal cluster light-stable catalysts, can solve the problems of the catalytic activity and stability of metal clusters on the surface properties, and achieve sustainable development and reduce agglomeration , extensive practical value and application prospects

Inactive Publication Date: 2020-05-12
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Usually, metal clusters are loaded on semiconductor supports and then undergo photocatalytic reactions, and the surface properties of the supports will undoubtedly affect the catalytic activity and stability of metal clusters. However, how to improve the performance of metal clusters by optimizing the surface properties of the supports? Studies on the photostability of clusters are still rarely reported

Method used

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  • Preparation method and application of a metal cluster photostable catalyst
  • Preparation method and application of a metal cluster photostable catalyst
  • Preparation method and application of a metal cluster photostable catalyst

Examples

Experimental program
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Embodiment 1

[0030] Please check image 3 , a metal cluster light-stable catalyst of the present embodiment is a nano-gold cluster-titanium dioxide nanosheet (TSBA) with surface regulation and interface modification, and its preparation steps are as follows:

[0031] (1) Preparation of titanium dioxide nanomaterials: 5 mL of n-tetrabutyl titanate (Ti(OBu) 4 ) and 1mL of hydrofluoric acid were mixed and added to the reaction kettle to react at 180°C for 24h, then cooled, centrifuged, washed, and dried to obtain titanium dioxide nanosheets;

[0032] (2) Preparation of interface-modified titanium dioxide nanomaterials: disperse 0.4 g of titanium dioxide nanosheets into 200 mL of ethanol solution, then add 4 mL of branched polyethyleneimine aqueous solution (86 mg / mL), and reflux at 60 ° C for 4 h to obtain the interface Modified titanium dioxide nanosheets;

[0033] (3) Preparation of nano-gold clusters: Disperse 0.24g of gold chloride trihydrate into 300mL of water, add 0.276g of cysteine ...

Embodiment 2

[0036] Please check figure 2 , a metal cluster light-stable catalyst of the present embodiment is an interface-modified nano-gold cluster-titania nanoparticle (TPBA), and its preparation steps are as follows:

[0037] (1) Preparation of titanium dioxide nanomaterials: 5 mL of n-tetrabutyl titanate (Ti(OBu) 4 ) and 1mL of water were mixed and added to the reaction kettle to react at 180°C for 24h, then cooled, centrifuged, washed, and dried to obtain titanium dioxide nanoparticles;

[0038] (2) Preparation of interface-modified titanium dioxide nanomaterials: disperse 0.4 g of titanium dioxide nanoparticles into 200 mL of ethanol solution, then add 4 mL of branched polyethyleneimine aqueous solution (86 mg / mL), and reflux at 60 ° C for 4 h to obtain the interface Modified titanium dioxide nanoparticles;

[0039] (3) Preparation of nano-gold clusters: Disperse 0.24g of gold chloride trihydrate into 300mL of water, add 0.276g of cysteine ​​and stir until colorless, then reflux...

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Abstract

The invention discloses a preparation method for a photostable catalyst of metal cluster and an application thereof. A surface nature regulation and / or interface modification combined strategy is adopted for promoting photostability of metal cluster; hydroxy content on titanium dioxide surface is reduced by coating fluorine ions, so that the aggregation of metal cluster can be reduced; on this basis, the material surface is modified with polymine, so that the photostability of metal cluster can be further promoted; under irradiation of visible light, the catalyst shows excellent activity and stability for photo-catalytically reducing hexavalent chromium. The preparation method is simple and practicable and the catalyst is low-cost and can be conveniently recycled, so that the compound photocatalytic material has high practical value and application prospect in the technical field of material preparation and the field of environmental pollutant treatment.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation and photocatalytic technology, and in particular relates to a preparation method and application of a metal cluster light-stable catalyst. Background technique [0002] Nano-gold clusters refer to relatively stable molecular-level aggregates with a size less than 2nm and composed of a certain number of gold atoms. Due to the quantum size effect, gold clusters have unique optical properties, electrical properties, chemical activities, etc., and have been widely used in the fields of biosensing, immune reaction, heterogeneous catalysis, and solar energy conversion. [0003] In the application of solar energy conversion, nano-gold clusters can not only serve as reactive active sites, but also can be used as photosensitizers to generate photogenerated electron-hole pairs, expanding the absorption range and intensity of materials in the visible light region. For example, nano-gold cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52A62D3/37
CPCA62D3/37B01J23/52B01J35/004
Inventor 唐紫超翁波郑兰荪
Owner XIAMEN UNIV
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