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Preparation method of jellyfish-shaped carbon nitride photocatalytic material with high specific surface area

A technology of high specific surface area, photocatalytic material, applied in the field of preparation of high specific surface area jellyfish-like carbon nitride photocatalytic material, can solve the problems such as hindering photo-generated electron-hole separation photocatalytic process, photocatalytic limitation, etc., to achieve enhanced Photocatalytic effect, improving reaction rate, and the effect of strong degradation ability

Inactive Publication Date: 2018-02-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But g-C 3 N 4 The small band gap (2.7eV, rutile phase 3.0eV) makes it rapidly recombine photogenerated electron-hole pairs after absorbing visible light, hindering the separation of photogenerated electron-holes and affecting the photocatalytic process, so g-C 3 N 4 Photocatalysis in the visible range is limited

Method used

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  • Preparation method of jellyfish-shaped carbon nitride photocatalytic material with high specific surface area
  • Preparation method of jellyfish-shaped carbon nitride photocatalytic material with high specific surface area

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Press to set high specific surface area jellyfish-like g-C 3 N 4 The mass composition percentage of melamine and polyacrylamide were weighed according to the ratio of 4:0.7, and a mixed solution composed of 20 ml of deionized water was added.

[0023] 2. Stir on a magnetic stirrer for 35 min, and then sonicate for 45 min. Finally, the obtained precipitate is centrifuged and dried under vacuum at 60° C. for 12 h.

[0024] 3. The dried precursor was added to a muffle furnace, and calcined at a high temperature of 550° C. (heating rate: 20° C. / min) for 100 min to obtain a brown solid.

[0025] 4. When the temperature drops to 300 °C, mix with carbon black according to the mass composition percentage of 8:3, stir evenly, and then grind it into a uniform powder with an agate mortar to obtain a jellyfish-like g-C with high specific surface area. 3 N 4 photocatalytic materials.

Embodiment 2

[0027] 1. Press to set high specific surface area jellyfish-like g-C 3 N 4 The mass composition percentage of melamine and polyacrylamide was weighed according to the ratio of 6:1, and a mixed solution composed of 20 ml of deionized water was added.

[0028] 2. Stir on a magnetic stirrer for 45 min, and then sonicate for 40 min. Finally, the obtained precipitate is centrifuged and dried in vacuum at 60° C. for 11 h.

[0029] 3. The dried precursor was added to a muffle furnace, and calcined at a high temperature of 560° C. (heating rate: 20° C. / min) for 120 min to obtain a brown solid.

[0030] 4. When the temperature drops to 305 °C, mix with carbon black according to the mass composition percentage of 10:4, stir evenly, and then grind it into a uniform powder with an agate mortar to obtain a jellyfish-like g-C with high specific surface area. 3 N 4 photocatalytic materials.

Embodiment 3

[0032] 1. Press to set high specific surface area jellyfish-like g-C 3 N 4 The mass composition percentage of melamine and polyacrylamide were weighed according to the ratio of 5:0.8, and a mixed solution composed of 20 ml of deionized water was added.

[0033] 2. Stir on a magnetic stirrer for 40 min, and then ultrasonicate for 50 min. Finally, the obtained precipitate is centrifuged and dried under vacuum at 60° C. for 13 h.

[0034] 3. The dried precursor was added to a muffle furnace, and calcined at a high temperature of 580° C. (heating rate: 20° C. / min) for 120 min to obtain a brown solid.

[0035]4. When the temperature drops to 300°C, mix with carbon black according to the mass composition percentage of 9:4, stir evenly, and then grind it into a uniform powder with an agate mortar to obtain a jellyfish-like g-C with high specific surface area. 3 N 4 photocatalytic materials.

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Abstract

The invention discloses a preparation method of a jellyfish-shaped carbon nitride photocatalytic material with high specific surface area. The main preparation process is as follows: performing combustion on a raw material hydrocarbon in the air and enabling one part of the raw material hydrocarbon to be cracked to generate carbon black; performing stirring and ultrasonic treatment on a reaction mixture of melamine and polyacrylamide at room temperature, and transferring the reaction mixture into a drying oven to dry; putting the product into a muffle furnace, heating at 500 to 600 DEG C and at the heating rate of 20 DEG C / minute for 100 to 150 minutes, adding the obtained carbon black when the temperature is decreased to 300+ / -10 DEG C, mixing, stirring uniformly, and grinding by an agatemortar into uniform powder to obtain the novel jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area. In the prepared jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area, the specific surface area of the g-C3N4 is increased by 10 to 30 times, the carbon black can serve as an ultraviolet stabilizer due to the light stability, and the durabilityof the photocatalytic material is improved. The preparation method is cheap in raw material, simple in process and suitable for industrialized mass production.

Description

technical field [0001] The invention belongs to the technical field of nanometer photocatalytic materials, and in particular relates to a preparation method of a high specific surface area jellyfish-like carbon nitride photocatalytic material. Background technique [0002] Photocatalytic technology is a hot spot of scientific research today, and its application range is very wide, such as sewage treatment, air purification, solar energy utilization, antibacterial, anti-fog, and self-cleaning functions. Graphite phase g-C 3 N 4 Because of its excellent photocatalytic performance, high activity, stability, non-toxicity and low price, it has become an ideal photocatalytic material, so it may have great application prospects in energy regeneration and environmental protection. but g-C 3 N 4 The small band gap (2.7eV, rutile phase 3.0eV) makes it possible to rapidly recombine photogenerated electron-hole pairs after absorbing visible light, hindering the separation of photoge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/03B01J37/08C02F1/30C02F101/30
CPCC02F1/30B01J27/24B01J37/0018B01J37/031B01J37/08C02F2305/10C02F2101/308B01J35/61B01J35/39
Inventor 司伟
Owner CHANGAN UNIV
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