Composite material of bimetallic oxide quantum dots and carbon nitride nano sheets as well as preparation method and application thereof

A technology of double metal oxides and composite materials, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve the problems of poor semiconductor charge separation, slow transport, and unsatisfactory improvement effects

Pending Publication Date: 2021-04-09
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor charge separation of semiconducto

Method used

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  • Composite material of bimetallic oxide quantum dots and carbon nitride nano sheets as well as preparation method and application thereof
  • Composite material of bimetallic oxide quantum dots and carbon nitride nano sheets as well as preparation method and application thereof
  • Composite material of bimetallic oxide quantum dots and carbon nitride nano sheets as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A composite material of double metal oxide quantum dots and carbon nitride nanosheets, comprising

[0036] continuous phase carbon nitride nanosheets; and

[0037] Disperse phase copper oxide quantum dots and iron oxide quantum dots.

[0038] Wherein, the molar ratio of the copper oxide quantum dots and iron oxide quantum dots is 7:3; the average particle diameter of the copper oxide quantum dots and iron oxide quantum dots is 2.2nm.

[0039] The preparation method of the composite material of the above-mentioned double metal oxide quantum dots and carbon nitride nanosheets comprises the following steps:

[0040]S1. Add urea to a crucible with a lid, place it in a muffle furnace and heat it to 550°C at a rate of 2.5°C / min, as the first stage of heating, and keep it for 4h; then cool the obtained crude product and open the lid of the crucible , heating to 500°C at a rate of 5°C / min in a muffle furnace as the second stage of heating, keeping for 2h, and calcining the ob...

Embodiment 2

[0048] A composite material of double metal oxide quantum dots and carbon nitride nanosheets, comprising

[0049] continuous phase carbon nitride nanosheets; and

[0050] Disperse phase copper oxide quantum dots and iron oxide quantum dots.

[0051] Wherein, the molar ratio of the copper oxide quantum dots and iron oxide quantum dots is 5:5; the average particle size of the copper oxide quantum dots and iron oxide quantum dots is 2.4nm.

[0052] The preparation method of the composite material of the above-mentioned double metal oxide quantum dots and carbon nitride nanosheets comprises the following steps:

[0053] S1. Add urea to a crucible with a lid, place it in a muffle furnace and heat it to 540°C at a rate of 2.5°C / min, as the first stage of heating, and keep it for 4h; then cool the obtained crude product and open the lid of the crucible , heating to 520°C at a rate of 5°C / min in a muffle furnace as the second stage of heating, keeping for 2h, and calcining the obtai...

Embodiment 3

[0058] A composite material of double metal oxide quantum dots and carbon nitride nanosheets, comprising

[0059] continuous phase carbon nitride nanosheets; and

[0060] Disperse phase copper oxide quantum dots and iron oxide quantum dots.

[0061] Wherein, the molar ratio of the copper oxide quantum dots and iron oxide quantum dots is 3:7; the average particle size of the copper oxide quantum dots and iron oxide quantum dots is 2.5nm.

[0062] The preparation method of the composite material of the above-mentioned double metal oxide quantum dots and carbon nitride nanosheets comprises the following steps:

[0063] S1. Add urea to a crucible with a lid, place it in a muffle furnace and heat it to 530°C at a rate of 2.5°C / min, as the first stage of heating, and keep it for 4h; then cool the obtained crude product and open the lid of the crucible , heating to 510°C at a rate of 5°C / min in a muffle furnace as the second stage of heating, keeping for 2h, and calcining the obtai...

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Abstract

The invention relates to a composite material of bimetallic oxide quantum dots and carbon nitride nano sheets. The composite material comprises continuous-phase carbon nitride nano sheets, dispersed-phase copper oxide quantum dots and iron oxide quantum dots. The structure has large specific surface area and defects, more active sites can be provided for photo-Fenton catalysis, and the activity of Fenton reaction is improved. In the composite material of the bimetallic oxide quantum dots and the carbon nitride nano sheets, the ultra-thin carbon nitride nano sheets have a large amount of nitrogen coordination, the carbon nitride nano sheets are used as carriers, the copper-iron oxide quantum dots can be effectively anchored, agglomeration among metal nano particles is prevented, Fe (III)/Fe (II) conversion is promoted, and meanwhile, Fe<3+> is used as an electron acceptor, and the compounding of photo-induced electron-hole pairs in the carbon nitride nano sheets can be inhibited, so that the efficiency of photo-Fenton oxidation degradation of organic pollutant tetracycline is improved, and the defects in the prior art are overcome.

Description

technical field [0001] The invention belongs to the field of catalyst materials, and in particular relates to a composite material of double metal oxide quantum dots and carbon nitride nanosheets, a preparation method and an application thereof. Background technique [0002] Water pollution caused by organic pollutants poses a serious threat to the environment and human health. Fenton and Photo-Fenton oxidation have played an important role in water purification and treatment of organic pollutants in water. Classical homogeneous Fenton reaction by Fe 2+ / H 2 o 2 Composition, Fe 2+ Can catalyze H 2 o 2 , the two undergo electron transfer to produce active substances such as hydroxyl radicals ( OH), and then oxidize organic compounds in sewage, converting them into low-toxic or even non-toxic compounds. Neither special reactants nor special installation. Nevertheless, the application of the homogeneous Fenton reaction is mainly hampered by the following disadvantages: ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F1/725C02F1/722C02F2305/026C02F2305/10C02F2101/38
Inventor 夏红刘铭恩鲁福身杨文欣陈钊彬刘潇宇
Owner SHANTOU UNIV
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