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Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst and preparation method of Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst

A ba-g-c3n4, photocatalyst technology, applied in the field of photocatalysis applications, can solve the problems of poor nitrogen fixation performance and low utilization rate of visible light, and achieve the effect of optimizing the energy band structure and improving the capture and conversion efficiency.

Inactive Publication Date: 2021-01-15
郭绍香
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical defects of low utilization rate of visible light and poor nitrogen fixation performance of existing nitrogen-fixing photocatalysts, the present invention provides a Bi-B doped SrWO 4 / Ba-g-C 3 N 4 Composite nitrogen fixation photocatalyst and preparation method thereof

Method used

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  • Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst and preparation method of Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst
  • Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst and preparation method of Bi-B doped SrWO4/Ba-g-C3N4 composite nitrogen fixation photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0023] Step one: the Ba(OH) of 4g melamine, 0.89g thiourea and 1.34g 2 After uniform mixing, put it into an aluminum oxide crucible, raise the temperature to 550°C in a muffle furnace, calcinate for 4-6 hours, and grind the obtained block sample in a mortar for 30-40 minutes after cooling to room temperature to obtain powdered Ba -g -C 3 N 4 .

[0024] Step 2: 1.1g of SrCl 2 ·6H 2 O and 1.64g Na 2 WO 4 2H 2 O was dissolved in 22ml and 8.2ml ethylene glycol respectively, and then to SrCl 2 ·6H 2 Add 2.58g trimethyl borate to the ethylene glycol solution of O, and add Na to the mixed solution dropwise at a rate of 1ml / min in a water bath at 50-60°C after ultrasonication for 10-15min. 2 WO 4 2H 2 O ethylene glycol solution, continue to stir for 20-30min after the dropwise addition, then add 2.4g of Ba-g-C to the mixed solution 3 N 4 and 0.6g BiCl 3 And ultrasonic for 5-8min, casually put the mixed solution in a polytetrafluoroethylene-lined reaction kettle at a temp...

Embodiment 2

[0026] Step one: the Ba(OH) of 6g melamine, 0.86g thiourea and 0.97g 2 After uniform mixing, put it into an aluminum oxide crucible, raise the temperature to 550°C in a muffle furnace, calcinate for 4-6 hours, and grind the obtained block sample in a mortar for 30-40 minutes after cooling to room temperature to obtain powdered Ba -g -C 3 N 4 .

[0027] Step two: the SrCl of 1.29g 2 ·6H 2 O and 1.59g Na 2 WO 4 2H 2 O was dissolved in 25.8ml and 8ml ethylene glycol respectively, and then to SrCl 2 ·6H 2 Add 2.02g trimethyl borate to the ethylene glycol solution of O, and add Na to the mixed solution dropwise at a rate of 1ml / min in a water bath at 50-60°C after ultrasonication for 10-15min. 2 WO 4 2H 2 O ethylene glycol solution, continue to stir for 20-30min after the dropwise addition, then add 3.6g of Ba-g-C to the mixed solution 3 N 4 and 0.53g BiCl 3 And ultrasonic for 5-8min, casually put the mixed solution in a polytetrafluoroethylene-lined reaction kettle a...

Embodiment 3

[0029] Step one: the Ba(OH) of 5g melamine, 1.1g thiourea and 1.57g 2 After uniform mixing, put it into an aluminum oxide crucible, raise the temperature to 550°C in a muffle furnace, calcinate for 4-6 hours, and grind the obtained block sample in a mortar for 30-40 minutes after cooling to room temperature to obtain powdered Ba -g -C 3 N 4 .

[0030] Step two: the SrCl of 1.36g 2 ·6H 2 O and 1.97g Na 2 WO 4 2H 2 O was dissolved in 27.2ml and 9.8ml ethylene glycol respectively, and then to SrCl 2 ·6H 2 Add 2.95g trimethyl borate to the ethylene glycol solution of O, and add Na to the mixed solution dropwise at a rate of 1ml / min in a water bath at 50-60°C after ultrasonication for 10-15min. 2 WO 4 2H 2 O ethylene glycol solution, continue to stir for 20-30min after the dropwise addition, then add 3g of Ba-g-C to the mixed solution 3 N 4 and 0.72g BiCl 3 And ultrasonic for 5-8min, casually put the mixed solution in a polytetrafluoroethylene-lined reaction kettle at...

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Abstract

The invention belongs to the technical field of photocatalysis application, and particularly relates to a BiB doped SrWO4 / Ba-g-C3N4 composite nitrogen fixation photocatalyst and a preparation method thereof. The preparation method comprises the steps: mixing melamine, thiourea and Ba(OH)2 according to a certain proportion, and then calcining in a muffle furnace to obtain Ba-g-C3N4; and by taking SrCl2.6H2O and Na2WO4.2H2O as raw materials, adding trimethyl borate and BiCl3, and precipitating on the surface of Ba-g-C3N4 to obtain the BiB-doped SrWO4 / Ba-g-C3N4 composite nitrogen fixation photocatalyst. The nitrogen fixation photocatalyst provided by the invention has high visible light utilization rate and strong nitrogen fixation performance.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis application, in particular to a Bi-B doped SrWO 4 / Ba-g-C 3 N 4 Composite nitrogen-fixing photocatalyst and preparation method thereof. Background technique [0002] Nitrogen plays a vital role in human life and is an indispensable element in substances that sustain human existence such as amino acids, proteins, pharmaceuticals, and fertilizers. Ammonia synthesized from nitrogen is not only used in the production of chemical raw materials such as nitrogen fertilizers, but also as fuel and hydrogen storage materials, and has great applications in the energy field. At present, the synthetic process widely used in the synthetic ammonia industry is still the Haber-Bosch method; because N 2 Molecules are non-polar molecules with very low activity, and the N=N triple bond has a strong chemical bond, which consumes a lot of energy in the process of breaking the chemical bond to synthesize ammo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01C1/02
CPCB01J27/24C01C1/026B01J35/39Y02P20/52
Inventor 郭绍香马光伟
Owner 郭绍香
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