b, s co-doped carbon nitride nanotube photocatalyst and its preparation method and application

Abstract

The invention relates to the technical field of photocatalysis, in particular to a B, S co-doped carbon nitride nanotube photocatalyst, a preparation method and an application. In the method, a rod-shaped intermediate with a regular shape is firstly obtained by a low-temperature hydrothermal method, and then calcined in a tube furnace to obtain B, S co-doped carbon nitride with a tubular structure. Utilizing the characteristics of the tubular structure itself and the band structure change caused by the introduction of B and S elements, the existing photocatalysts solve the problems of low utilization rate of visible light, few exposed active sites, and low degradation efficiency of high-concentration organic dyes.

Description

technical field

[0001] The invention relates to the technical field of photocatalysis, in particular to a B, S co-doped carbon nitride nanotube photocatalyst, a preparation method and an application. Background technique

[0002] As a promising green technology, photocatalysis has great application potential in the removal of organic pollutants and solar energy conversion. TiO 2 It has become the most popular and widely used photocatalyst since its first successful application in photolysis of water in 1972. However, the wide bandgap and weak activity in the visible region greatly limit the TiO 2 practical application. To overcome TiO 2 The disadvantage of wide bandgap, a large number of narrow bandgap semiconductors (Ag 3 PO 4 、BiVO 4 , CdS and Bi 2 WO 6 etc.) have been developed to efficiently utilize visible light.

[0003] As a non-metallic polymer semiconductor, carbon nitride has attracted extensive attention from researchers in the fields of photoelectrocata...

Examples

Embodiment 1

[0022] Embodiment 1: B of the present invention, the preparation method of S co-doped carbon nitride nanotube photocatalyst specifically comprises the following steps:

[0023] Step 1: Put 1 g of melamine, 1 g of thiourea and 0.1 g of boric acid in a beaker filled with 40 mL of deionized water, and disperse with magnetic stirring at room temperature for 40 minutes to obtain a mixed dispersion;

[0024] Step 2: Transfer the obtained mixed dispersion to a 50mL hydrothermal reaction kettle, put it in a constant temperature oven at 180°C for 12 hours, then wait for the reaction kettle to cool down to room temperature naturally, pour the obtained mixed dispersion directly into a surface container, and put it in the freezer drying in a drier to obtain a rod-shaped intermediate;

[0025] Step 3: Weigh two parts of 1.2g intermediate respectively and place them in two crucibles. The crucibles need to be covered, and the two crucibles are placed on an ark and placed in the central tempe...

technical field

[0001] The invention relates to the technical field of photocatalysis, in particular to a B, S co-doped carbon nitride nanotube photocatalyst, a preparation method and an application. Background technique

[0002] As a promising green technology, photocatalysis has great application potential in the removal of organic pollutants and solar energy conversion. TiO 2 It has become the most popular and widely used photocatalyst since its first successful application in photolysis of water in 1972. However, the wide bandgap and weak activity in the visible region greatly limit the TiO 2 practical application. To overcome TiO 2 The disadvantage of wide bandgap, a large number of narrow bandgap semiconductors (Ag 3 PO 4 、BiVO 4 , CdS and Bi 2 WO 6 etc.) have been developed to efficiently utilize visible light.

[0003] As a non-metallic polymer semiconductor, carbon nitride has attracted extensive attention from researchers in the fields of photoelectrocata...

Examples

Embodiment 1

[0022] Embodiment 1: B of the present invention, the preparation method of S co-doped carbon nitride nanotube photocatalyst specifically comprises the following steps:

[0023] Step 1: Put 1 g of melamine, 1 g of thiourea and 0.1 g of boric acid in a beaker filled with 40 mL of deionized water, and disperse with magnetic stirring at room temperature for 40 minutes to obtain a mixed dispersion;

[0024] Step 2: Transfer the obtained mixed dispersion to a 50mL hydrothermal reaction kettle, put it in a constant temperature oven at 180°C for 12 hours, then wait for the reaction kettle to cool down to room temperature naturally, pour the obtained mixed dispersion directly into a surface container, and put it in the freezer drying in a drier to obtain a rod-shaped intermediate;

[0025] Step 3: Weigh two parts of 1.2g intermediate respectively and place them in two crucibles. The crucibles need to be covered, and the two crucibles are placed on an ark and placed in the central tempe...

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