Preparation method for supermolecular pre-assembled carbon nitride nanotube photocatalyst

A photocatalyst and supramolecular technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low degradation efficiency of high-concentration organic dyes and low utilization rate of visible light, etc., to achieve beneficial Large-scale preparation, the preparation method is simple and easy, and the effect of strong controllability

Active Publication Date: 2018-04-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Utilizing the characteristics of the tubular structure of carbon chlorozanitride and the change of energy band structure caused by the introduction of chlorine, the existing photocatalysts have solved the problems of low utilization rate of visible light and low degradation efficiency of high-concentration organic dyes.

Method used

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  • Preparation method for supermolecular pre-assembled carbon nitride nanotube photocatalyst
  • Preparation method for supermolecular pre-assembled carbon nitride nanotube photocatalyst
  • Preparation method for supermolecular pre-assembled carbon nitride nanotube photocatalyst

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Embodiment 1

[0021] Embodiment 1: the preparation method of the supramolecular pre-assembled carbon nitrogen nanotube photocatalyst of the present invention, specifically comprises the following steps:

[0022] Step 1: Put 2 g of melamine and 3 g of hydroxylamine chloride in a 40 mL beaker filled with deionized water, and disperse with magnetic stirring at room temperature for 30 minutes to obtain a mixed dispersion;

[0023] Step 2: Transfer the obtained mixed dispersion to a 50mL hydrothermal reaction kettle, put it in a constant temperature oven at 140°C for 12 hours, then let the reaction kettle cool down to room temperature naturally, and centrifuge at 11000-13000 rpm for 1 -3min, wash with deionized water and ethanol three times each, and dry in a constant temperature oven at 60°C to obtain a rod-shaped supramolecular intermediate;

[0024] Step 3: Weigh four portions of 1.5g supramolecular intermediates and place them in four crucibles (all four crucibles are covered), place the fou...

Embodiment 2

[0031] Embodiment 2: the preparation method of the supramolecular pre-assembled carbon nitrogen nanotube photocatalyst of the present invention, specifically comprises the following steps:

[0032] Step 1: Put 0.8g of melamine and 2g of hydroxylamine chloride into a 35mL beaker filled with deionized water, stir magnetically at room temperature to disperse, and stir for 20min to obtain a mixed dispersion;

[0033] Step 2: Transfer the obtained mixed dispersion to a 50mL hydrothermal reaction kettle, put it in a constant temperature oven at 120°C for 14 hours, then let the reaction kettle cool down to room temperature naturally, and centrifuge at 11000-13000 rpm for 1 -3min, wash with deionized water and ethanol three times each, and dry in a constant temperature oven at 60°C to obtain a rod-shaped supramolecular intermediate;

[0034] Step 3: Weigh four portions of 1.2g supramolecular intermediates and place them in four crucibles (all four crucibles are covered), place the fou...

Embodiment 3

[0035] Embodiment 3: the preparation method of the supramolecular pre-assembled carbon nitrogen nanotube photocatalyst of the present invention, specifically comprises the following steps:

[0036] Step 1: Put 0.5g of melamine and 1.2g of hydroxylamine chloride into a 50mL beaker filled with deionized water, stir magnetically at room temperature to disperse, and stir for 25min to obtain a mixed dispersion;

[0037] Step 2: Transfer the obtained mixture to a 50mL hydrothermal reaction kettle, put it in a constant temperature oven at 150°C for 10 hours, then let the reaction kettle cool down to room temperature naturally, and centrifuge at 11000-13000 rpm for 1- 3min, washed with deionized water and ethanol three times each, and dried in a constant temperature oven at 60°C to obtain a rod-shaped supramolecular intermediate;

[0038] Step 3: Weigh four parts of 2g supramolecular intermediates respectively and place them in four crucibles (all four crucibles are covered). Control...

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Abstract

The invention relates to a photocatalyst, especially to a supermolecular pre-assembled carbon nitride nanotube photocatalyst and a preparation method thereof, belonging to the technical field of preparation methods for photocatalysis materials. The preparation method comprises the following steps: preparing a rod-like supermolecular intermediate with a structured morphology by using a low-temperature hydrothermal process; and carrying out calcining in a tubular furnace so as to obtain a chlorine-doped carbon nitride nanotube with a good morphology. The preparation method overcomes the problemsof low visible light utilization rate, low degradation efficiency of high-concentration organic dyes and the like of conventional photocatalysts in virtue of the characteristics of the tubular structure of the chlorine-doped carbon nitride nanotube and changes in an energy band structure caused by introduction of elemental chlorine.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a supramolecular pre-assembled chlorinated carbon nanotube visible light photocatalyst and a preparation method thereof, belonging to the technical field of preparation methods of photocatalytic materials. Background technique [0002] As a non-metallic semiconductor material, graphitic carbon nitride not only has a suitable band gap to effectively use visible light, but also has excellent physical and chemical properties, such as excellent chemical and thermal stability, good photoelectric properties, and extremely Good antioxidant properties. Therefore, graphitic carbon nitride is widely used in the fields of photolysis of water to produce hydrogen, photocatalytic carbon dioxide reduction, and degradation of organic pollutants under visible light. However, there are still many fatal shortcomings for ordinary carbon nitride: high recombination probability of photogenerated electron-hole pairs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/30
CPCB01J27/24B01J35/004B01J35/023C02F1/30C02F1/725C02F2101/308C02F2305/10
Inventor 许晖莫曌李华明徐远国佘小杰
Owner JIANGSU UNIV
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