CuOx nano-cluster and application thereof as ozone catalyst

A nano-cluster and reaction technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, copper oxide/copper hydroxide, etc. Problems such as high surface energy, to achieve a simple and controllable preparation process

Active Publication Date: 2020-05-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • CuOx nano-cluster and application thereof as ozone catalyst
  • CuOx nano-cluster and application thereof as ozone catalyst

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 CuOx nano-cluster and an application thereof as an ozone catalyst. The CuOx nano-cluster is obtained by mixing an aminated carrier with a high specific surface area with a copper ion solution, carrying out a complexing reaction, filtering a reaction solution after the reaction is finished to obtain a solid, washing and drying the solid, and finally calcining the solid at300-500 DEG C for 2-8 hours and carrying out cooling. According to the CuOx nano-cluster, amino functionalization is carried out on the carrier firstly, active riveting points complexed with copper ions are formed on the surface of the carrier, then complexation reaction is carried out on the active riveting points and the copper ions, and therefore Cu2+ is controllably and evenly dispersed on thesurface of the carrier in a high-degree mode, and the CuOx nano-cluster is obtained after calcination. The preparation process of the CuOx nano-cluster is simple and controllable, and the obtained CuOx nano-cluster has rich dangling bonds (unsaturated coordination) and can be used as an ozone catalyst to efficiently catalyze ozone to oxidize and 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 Applications(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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