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a cuo x Nanoclusters and their Application as Ozone Catalysts

A nano-cluster and catalyst technology, which is applied to CuOx nano-cluster and its application field as an ozone catalyst, can solve the problems of difficult preparation of nano-clusters, unstable thermodynamics, difficult preparation and the like, and achieves the effect of simple and controllable preparation process.

Active Publication Date: 2021-05-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high surface energy and thermodynamic instability of nano-clusters, its preparation is still very difficult, especially the preparation of nano-clusters of metal oxides is particularly difficult. Usually, it is loaded on a porous carrier, but this load has no fixed riveting points , the loading is random, and it is easy to aggregate to form large particles of metal oxides instead of clusters

Method used

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  • a cuo <sub>x</sub> Nanoclusters and their Application as Ozone Catalysts
  • a cuo <sub>x</sub> Nanoclusters and their Application as Ozone Catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a CuO x Nanoclusters, the preparation process is as follows:

[0036] (1) Add 0.05g TiO 2 The nanotubes were added to 20 mL of ethanol, and 200 μL of 3-aminopropyltrimethoxysilane was added while stirring, stirred and reacted for 12 hours, filtered and washed to obtain a surface-aminated carrier;

[0037] (2) Add the surface-aminated carrier to 50 mL of copper ion solution with a copper ion concentration of 10 mg / L, stir for 20 seconds, filter, wash, and dry;

[0038] (3) Place the dried material in a muffle furnace, and after calcination at a calcination temperature of 350°C for 3 hours, cool to room temperature to obtain a CuO x nanoclusters.

[0039] Scanning electron microscopy of the final product as prepared figure 1 shown, from figure 1 Only the nanotube structure of the support can be seen in ; the high-resolution transmission electron microscope of the prepared final product is shown in figure 2 As shown, when the scale bar is 5nm, the diffraction fringe...

Embodiment 2

[0042] a CuO x Nanoclusters, the preparation process is as follows:

[0043] (1) 0.05g CeO 2 The nanotubes were added to 5 mL of ethanol, and 500 μL of 3-aminopropyltrimethoxysilane was added while stirring, stirred and reacted for 12 hours, filtered and washed to obtain a surface-aminated carrier;

[0044] (2) Add the surface-aminated carrier to 33 mL of copper ion solution with a copper ion concentration of 20 mg / L, stir for 10 seconds, filter, wash, and dry;

[0045] (3) The dried material was placed in a muffle furnace, calcined at a calcination temperature of 350° C. for 3 h, and then cooled to room temperature to obtain a CuOx nanocluster.

[0046] Catalyst performance evaluation: the antibiotic florfenicol was selected as the simulated pollutant, but not limited to florfenicol, and 100mL, 15mg / L florfenicol wastewater, 0.3g / L CeO 2 Nanotube-supported CuO x Cluster ozone catalyst, test the removal rate of florfenicol to evaluate the catalyst's ozone catalytic oxidati...

Embodiment 3

[0050] a CuO x Nanoclusters, the preparation process is as follows:

[0051] (1) Add 0.05g TiO 2 The nanotubes were added to 20 mL of ethanol, and 200 μL of 3-aminopropyltrimethoxysilane was added while stirring, stirred and reacted for 12 hours, filtered and washed to obtain a surface-aminated carrier;

[0052] (2) Add the surface-aminated carrier to 1000 mL of copper ion solution with a copper ion concentration of 1 mg / L, stir for 30 seconds, filter, wash, and dry;

[0053] (3) Place the dried material in a muffle furnace, and after calcination at a calcination temperature of 350°C for 3 hours, cool to room temperature to obtain a CuO x nanoclusters.

[0054] Catalyst performance evaluation: the antibiotic florfenicol was selected as the simulated pollutant, but not limited to florfenicol, and 100mL, 15mg / L florfenicol wastewater, 0.3g / L TiO 2 Nanotube-supported CuO x Cluster ozone catalyst, test the removal rate of florfenicol to evaluate the catalyst's ozone catalytic...

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Abstract

The invention discloses a CuO x Nanoclusters and their application as ozone catalysts. The CuO x Nano-clusters are mixed with aminated high specific surface area carrier and copper ion solution, then undergo a complexation reaction. After the reaction is completed, the reaction liquid is filtered to obtain a solid, which is washed and dried, and finally calcined at 300-500°C for 2- 8h, obtained after cooling. CuO of the present invention x The nanoclusters first functionalize the support with amino groups, form active riveting points on the surface of the support that are complexed with copper ions, and then perform a complex reaction with copper ions, thereby controllably integrating Cu 2+ Highly and uniformly dispersed on the surface of the carrier, CuO can be obtained after calcination x nanoclusters; the CuO x The preparation process of nanoclusters is simple and controllable, and the obtained CuO x Nanoclusters possess abundant dangling bonds (unsaturated coordination) and can be used as ozone catalysts to efficiently catalyze the oxidation of ozone to degrade organic pollutants.

Description

technical field [0001] The invention relates to the technical field of ozone catalytic oxidation and environmental materials, more specifically, to a CuO x Nanoclusters and their application as ozone catalysts. Background technique [0002] Ozone catalytic oxidation technology is an advanced oxidation method that combines ozone oxidation technology with a catalyst. The catalyst can promote the rapid decomposition of ozone to generate various active oxygen species (such as hydroxyl radicals, singlet oxygen, surface oxygen atoms, etc.), which can convert Those highly stable and refractory organic pollutants that are difficult to be oxidized by ozone alone can be effectively degraded, so as to achieve deep oxidation and maximum removal of organic pollutants. [0003] Nanoclusters refer to intermediate structures between single atoms or molecules and nanomaterials assembled by a small number of atoms or molecules. Compared with single atoms, it is easier to prepare, and the at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/02C01G3/02C02F1/72C02F1/78C02F101/30
CPCB01J23/72B01J35/023C01G3/02C01P2004/64C02F1/725C02F1/78C02F2101/30
Inventor 田双红张晓霞熊亚
Owner SUN YAT SEN UNIV
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