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Interlayer double metal ion doped carbon nitride photocatalytic material and its preparation and application

An ion-doping and catalytic material technology, applied in the field of preparation and application of layered photocatalytic materials, can solve the problems of low quantum efficiency and high exciton binding energy, achieve high specific surface area, simple synthesis process, and improve reaction activity. Effect

Inactive Publication Date: 2018-06-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a graphite phase carbon nitride photocatalytic material doped with interlayer double metal ions and its preparation method and application, which solves the problem of exciton generation of photogenerated carriers by using graphite phase carbon nitride as a photocatalytic material in the prior art High binding energy, serious photogenerated electron-hole recombination, and low quantum efficiency

Method used

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  • Interlayer double metal ion doped carbon nitride photocatalytic material and its preparation and application
  • Interlayer double metal ion doped carbon nitride photocatalytic material and its preparation and application
  • Interlayer double metal ion doped carbon nitride photocatalytic material and its preparation and application

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Embodiment 1

[0032] Preparation of carbon nitride doped with interlayer double metal ions: Disperse 1.5g of melamine in 30ml of ethanol, add 0.5ml of FeCl with a concentration of 0.5g / 10ml to it 3 ·6H 2 O in ethanol and evaporated to dryness at 80°C. Add 7.5g potassium chloride to the evaporated matter, put the mixed powder in a mortar and grind for 10-30min. After fully mixing evenly, put the powder in the crucible, seal the mouth of the crucible with aluminum foil paper, put it in a muffle furnace and raise the temperature to 550°C (the heating rate is 2.5°C / min), keep it warm for 4h, then cool to room temperature and take it out. The sintered powder is finely ground with a mortar, washed with deionized water and separated by suction filtration, dried at 80°C, and ground to obtain the interlayer K + , Fe 3+ Double-ion doped carbon nitride. Determined by X-ray photoelectron spectroscopy, K + The doping amount is 9.2% mole percent, Fe 3+ The doping amount is 1.7% by mole.

Embodiment 2

[0034] The influence of different doping elements on the product: Weigh 10 parts of 1.5g melamine, disperse them in 30ml ethanol respectively, add different volumes of FeCl with a concentration of 0.5g / 10mL to each of the ten samples 3 ·6H 2 O, Ga(NO 3 ) 3 , Cr(NO 3 ) 3 9H 2 O, AlCl 3 、CoCl 2·6H 2 O, MnCl 2 4H 2 O, ZnCl 2 , CaCl 2 , MgCl 2 ethanol solution and 0.5g / 10mL of BaCl 2 , SrCl 2 The aqueous solution was evaporated to dryness at 80°C. Mix the evaporated product above with 7.5g potassium chloride, and grind it in a mortar for 10-30min. After fully mixing evenly, put the powder in the crucible, seal the mouth of the crucible with aluminum foil paper, put it in a muffle furnace and raise the temperature to 550°C (the heating rate is 2.5°C / min), keep it warm for 4h, then cool to room temperature and take it out. The sintered powder was finely ground with a mortar, washed with deionized water and separated by suction filtration, dried at 80°C, and powdered ...

Embodiment 3

[0037] The influence of different carbon and nitrogen sources on the product: Weigh six parts of 1.5g of cyanamide, dicyandiamide, melamine, cyanuric acid, thiourea, and urea, and disperse them in 30ml of ethanol, and add 0.25ml of them to the concentration of 0.5 g / 10ml FeCl 3 ·6H 2 O in ethanol and evaporated to dryness at 80°C. Mix the evaporated product above with 7.5g potassium chloride, and grind it in a mortar for 10-30min. After fully mixing evenly, put the powder in the crucible, seal the mouth of the crucible with aluminum foil paper, put it in a muffle furnace and raise the temperature to 550°C (the heating rate is 2.5°C / min), keep it warm for 4h, then cool to room temperature and take it out. The sintered powder was finely ground with a mortar, washed with deionized water and separated by suction filtration, dried at 80°C, and powdered samples were obtained after grinding. Determined by X-ray photoelectron spectroscopy, K + The doping amount is 7-11% mole perce...

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Abstract

The invention discloses an interlayer double metal ion doped graphite-phase carbon nitride photocatalytic material as well as a preparation method and an application thereof to photocatalytic degradation of gas-phase organic pollutants. During preparation, carbon and nitrogen sources, potassium chloride and second and third main groups or fourth cycle subgroup of metal salt are used as raw materials and treated at the temperature of 400-600 DEG C for a period in a muffle, washing, suction filtration and separation are performed on products, and the graphite-phase carbon nitride photocatalytic material double doped with one of potassium ions and the second and third main groups or fourth cycle subgroup of metal ions in interlayers is obtained. The synthesis technology is simple, the cost is low, the photocatalytic efficiency is high, and the material has excellent photocatalytic performance in degrading gas-phase organic pollutants.

Description

technical field [0001] The invention relates to the preparation and application of a layered photocatalytic material, in particular to the preparation of a carbon nitride photocatalytic material doped with interlayer double metal ions and its application in photocatalytic degradation of gas-phase organic matter. Background technique [0002] With the increasingly serious energy crisis and environmental pollution problems, new energy technologies and new environmental purification technologies have attracted much attention. As a green technology, photocatalytic technology has made great progress in recent years. Photocatalytic reactions can not only split water to generate clean hydrogen energy, but also show great potential in photodegradation of environmental pollution. Photocatalytic purification technology has the advantages of small secondary pollution, low operating cost, and the use of solar energy to provide reaction driving force. It has broad application prospects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/72B01D53/40B01D53/44
Inventor 侯葳舒李云祥欧阳述昕赵恺丰徐天宇徐欣孙欢叶金花
Owner TIANJIN UNIV
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