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P-doped solvothermal g-C3N4 photocatalyst preparation method

A photocatalyst and solvothermal technology, applied in the field of energy chemistry, can solve the problems of insignificant improvement of photocatalytic performance, ineffective doping of P elements, etc. Simple experimental setup

Active Publication Date: 2019-05-14
XI AN JIAOTONG UNIV
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  • Description
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Problems solved by technology

[0005] The object of the present invention is to provide a kind of P effective doping solvothermal g-C 3 N 4 The preparation method of photocatalyst, to solve the preparation of P-doped g-C in the prior art 3 N 4 In photocatalysts, P elements cannot be effectively doped into g-C 3 N 4 , leading to an insignificant improvement in the photocatalytic performance

Method used

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preparation example Construction

[0029] A kind of P-doped solvothermal g-C of the present invention 3 N 4 The preparation method of photocatalyst comprises the steps:

[0030] S1. Put g-C 3 N 4 Disperse the powder in ethanol solution, and stir evenly after ultrasonic to obtain suspension A;

[0031] S2. Add an appropriate amount of water and ammonia water to the suspension A obtained in S1, stir evenly, heat and keep it at a certain temperature for a period of time, take it out, wash and dry, and obtain powder B;

[0032] S3. the powder B obtained in step S2 and a certain amount of sodium hydrogen hypophosphite (Na 2 HPO 2 ) was ground and mixed evenly, and after calcining at a certain temperature in a tube furnace with Ar gas, it was taken out, washed and dried, and finally P-doped solvothermal g-C was obtained. 3 N 4 catalyst of light. Among them, powder B and sodium hydrogen hypophosphite (Na 2 HPO 2 ) with a mixing mass ratio of 2:1, the calcination temperature under Ar gas is 300°C, the heating...

Embodiment 1

[0036] The P-doped solvothermal g-C prepared by the present invention 3 N 4 The method for photocatalyst, comprises the steps:

[0037] S1. Add 300mg of g-C 3 N 4 The powder was dispersed in 60mL of ethanol solution, ultrasonicated for 30min and then stirred for 1h to obtain suspension A;

[0038] S2. Add 1.25mL of water and 1.25mL of ammonia water to the suspension A obtained in S1, stir for 30min, put it into a hydrothermal kettle, heat the solvent at 140 degrees for 24h, cool naturally, take it out, wash and dry, and obtain powder B ; Drying is adjusted to 50 degrees vacuum drying for 8 hours.

[0039] S3. Mix the powder B (100mg) obtained in step S2 with 50mg of sodium hydrogen hypophosphite (Na 2 HPO 2 ) Grind and mix evenly, calcinate in a tube furnace with Ar gas at 300°C for 2 hours, take it out, wash and dry, and finally get P-doped solvothermal g-C 3 N 4 catalyst of light. Drying is adjusted to 50 degrees of vacuum drying for 8 hours.

Embodiment 2

[0041] S1. Add 500mg of g-C 3 N 4 The powder was dispersed in 60mL of ethanol solution, ultrasonicated for 30min and then stirred for 1h to obtain suspension A;

[0042] S2. Add 1.25mL of water and 1.25mL of ammonia water to the suspension A obtained in S1, stir for 30min, put it into a hydrothermal kettle, heat the solvent at 140 degrees for 24h, cool naturally, take it out, wash and dry, and obtain powder B ; Drying is adjusted to 60 degrees vacuum drying for 8 hours.

[0043] S3. Mix the powder B (100mg) obtained in step S2 with 50mg of sodium hydrogen hypophosphite (Na 2 HPO 2 ) Grind and mix evenly, calcinate in a tube furnace with Ar gas at 300°C for 2 hours, take it out, wash and dry, and finally get P-doped solvothermal g-C 3 N 4 catalyst of light. Drying is adjusted to 60 degrees of vacuum drying for 8 hours.

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Abstract

The invention discloses a P-doped solvothermal g-C3N4 photocatalyst preparation method, which includes the following steps: S1. dispersing g-C3N4 powder in an ethanol solution, and uniformly stirringafter ultrasonic treatment to obtain a suspension A; S2. adding a proper amount of water and ammonia water into the suspension A obtained by S1, uniformly stirring, heating and preserving heat for a period of time at a certain temperature, taking out, washing and drying to obtain powder B; S3. grinding and uniformly mixing the powder B obtained in the step S2 and a certain amount of sodium hypophosphite (Na2HPO2), calcining at a certain temperature in a tubular furnace filled with Ar gas, taking out, washing and drying to finally obtain the P-doped solvothermal G-C3N4 photocatalyst. The methodhas simple experimental device and simple experimental operation steps, improves the production efficiency, reduces the reaction cost and is very beneficial to the popularization of the synthesis method.

Description

technical field [0001] The invention relates to the technical field of energy chemistry, in particular to a P-doped solvothermal g-C 3 N 4 Preparation method of photocatalyst. Background technique [0002] In order to reduce the dependence on fossil energy and carbon emissions, the development of clean and efficient renewable energy is imminent. Hydrogen energy is regarded as a high-quality energy that can promote the sustainable development of human society due to its advantages such as high combustion calorific value, clean combustion products and wide sources. Utilizing solar photocatalytic water splitting to produce hydrogen is an ideal way to efficiently produce hydrogen, and it is also one of the hotspots in the field of energy research (Guo Liejin, Liu Tao, Ji Jun, etc. Large-scale hydrogen production using solar energy. Science and Technology Herald, 2005, 23(2 ):29-34). Preparation of efficient, stable, and low-cost photocatalysts is the key to promote the reali...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04C01B13/02
CPCY02E60/36
Inventor 陈玉彬秦知校王朦胧李锐
Owner XI AN JIAOTONG UNIV
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