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A method for preparing high-efficiency carbon nitride nanorod photocatalysts by acidification-assisted hydrothermal method

A photocatalyst and carbon nitride technology, applied in the field of catalysis, can solve the problems of cumbersome experimental steps and human harm, and achieve the effect of safe and effective process, strong repeatability, safe and efficient process

Active Publication Date: 2018-11-02
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, researchers have used the template method to prepare carbon nitride with a rod-like structure. However, because the template method requires a series of reactions to remove the template in the later stage, the experimental steps are cumbersome, and the required reagents are also very harmful to the human body.

Method used

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  • A method for preparing high-efficiency carbon nitride nanorod photocatalysts by acidification-assisted hydrothermal method
  • A method for preparing high-efficiency carbon nitride nanorod photocatalysts by acidification-assisted hydrothermal method
  • A method for preparing high-efficiency carbon nitride nanorod photocatalysts by acidification-assisted hydrothermal method

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Experimental program
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Embodiment 1

[0033] A method for preparing efficient carbon nitride nanorod photocatalyst by acidification-assisted hydrothermal method, the method is as follows:

[0034] (1) Weigh 20g of urea and place it in a ceramic crucible with a lid, raise the temperature to 550°C in a muffle furnace at a rate of 2°C / min, keep it for 4 hours, and naturally cool to room temperature to obtain graphite-like layered carbon nitride;

[0035] (2) Disperse 0.5 g of the prepared carbon nitride powder in 1M hydrochloric acid, continue to stir for 2 hours, collect the carbon nitride powder by centrifugation and wash it with deionized water three times;

[0036] (3) The acidified carbon nitride was placed in a polytetrafluoroethylene autoclave, and 100mL of deionized water was added, kept at 180°C for 3 hours, and then naturally cooled to room temperature;

[0037] (4) Collect the powder of the lower layer, wash it with deionized water three times, and then dry it in a blast drying oven at 60°C for 5 hours unt...

Embodiment 2

[0039] A method for preparing efficient carbon nitride nanorod photocatalyst by acidification-assisted hydrothermal method, the method is as follows:

[0040] (1) Weigh 30g of urea and place it in a ceramic crucible with a lid, raise the temperature to 550°C in a muffle furnace at a rate of 1.5°C / min, keep it for 4 hours, and naturally cool to room temperature to obtain graphite-like layered carbon nitride;

[0041] (2) Disperse 0.8 g of the prepared carbon nitride powder in 2M hydrochloric acid, continue to stir for 3 hours, collect the carbon nitride powder by centrifugation and wash it with deionized water three times;

[0042] (3) The acidified carbon nitride was placed in a polytetrafluoroethylene autoclave, and 100mL of deionized water was added, kept at 150°C for 5h, and then naturally cooled to room temperature;

[0043] (4) Collect the powder in the lower layer, wash it with deionized water three times, and then dry it in a blast drying oven at 60°C for 8 hours until ...

Embodiment 3

[0045] A method for preparing efficient carbon nitride nanorod photocatalyst by acidification-assisted hydrothermal method, the method is as follows:

[0046] (1) Weigh 20g of urea and place it in a ceramic crucible with a lid, raise the temperature to 550°C in a muffle furnace at a rate of 2°C / min, keep it for 4 hours, and naturally cool to room temperature to obtain graphite-like layered carbon nitride;

[0047] (2) Take 0.5 g of the prepared carbon nitride powder and disperse it in 2M sulfuric acid. After stirring for 3 hours, the carbon nitride powder is collected by centrifugation and washed three times with deionized water;

[0048] (3) The acidified carbon nitride was placed in a polytetrafluoroethylene autoclave, and 100mL of deionized water was added, kept at 200°C for 3 hours, and then naturally cooled to room temperature;

[0049] (4) Collect the powder of the lower layer, wash it with deionized water three times, and then dry it in a blast drying oven at 60°C for 6...

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Abstract

The present invention relates to a method for preparing high-efficiency carbon nitride nanorod photocatalyst by acidification-assisted hydrothermal method. The method is as follows: S1: using urea as a precursor, calcining in a muffle furnace to prepare ordinary graphite-like layered nitriding Carbon; S2: Disperse the prepared carbon nitride powder in a strong acid solution with a concentration of 1 to 3 mol / L, continue to stir and acidify for 2 to 3 hours, then collect and wash with water; S3: use water as a solvent to obtain S2 The carbon nitride powder is subjected to hydrothermal treatment, the hydrothermal treatment temperature is 150-200° C., and the hydrothermal treatment time is 3-5 hours; S4: the product obtained by the hydrothermal treatment is washed with water and then dried to obtain the carbon nitride nanorod photocatalyst. Compared with the template method for preparing rod-shaped carbon nitride, the method provided by the invention has simple experimental operation, safe and effective process, and strong repeatability. Compared with the traditional graphite-like layered carbon nitride, the carbon nitride nanorod prepared by the method provided by the invention has a stable morphology structure, a larger specific surface area and excellent photocatalytic performance.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a method for preparing a high-efficiency carbon nitride nanorod photocatalyst by an acidification-assisted hydrothermal method. Background technique [0002] In recent years, the rapid development of science and technology and the rapid growth of economy have not only brought huge material wealth and convenient and easy life to all mankind, but also brought about the aggravation of energy consumption and environmental pollution. The environmental pollution caused by the three wastes (waste water, waste gas, and waste residue) pollutants being discharged directly into the environment without treatment has seriously affected the quality of human daily life. How to properly deal with these environmental problems without causing new pollution and waste of resources will be related to the normal progress of sustainable development of human society. Nowadays, the biggest clean energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24C02F2101/308C02F2101/40C02F2101/38C02F2101/34C02F2305/10B01J35/39
Inventor 陈志鸿王新马歌吕海钦
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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