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Carbon nitride supported catalyst and preparation method and application thereof

A supported catalyst and carbon nitride technology, applied in the field of photocatalytic materials, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple preparation process and efficient degradation

Inactive Publication Date: 2020-07-28
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above scheme, g-C 3 N 4 / WO 3 Most of the composite catalysts are prepared first to obtain g-C doped with the above metal or non-metal elements. 3 N 4 , and then the doped g-C 3 N 4 and WO 3 Composite, the preparation process is relatively complicated, the cost is high, and most catalysts can only oxidize organic matter to intermediate products that are difficult to degrade (such as oxalic acid and other carboxylic acids) and retain water, and cannot degrade these intermediate products

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  • Carbon nitride supported catalyst and preparation method and application thereof
  • Carbon nitride supported catalyst and preparation method and application thereof
  • Carbon nitride supported catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Embodiment one, g-C 3 N 4 Preparation and degradation test

[0057] 1. Preparation of g-C 3 N 4

[0058] Add 80mL of methanol to the beaker, then add 4g of urea, ultrasonically dissolve the urea, then add 2g of melamine, and ultrasonically disperse it evenly (about 30min) to obtain a mixed solution; stir the mixed solution on a magnetic stirrer at 80°C until Dry, grind the obtained solid product and place it in a muffle furnace for calcination (heat the solid product to 80°C for 1h, then raise the temperature to 550°C for 3h; the heating rate is 2°C / min) to obtain g-C 3 N 4 (about 1.4g), denoted as g-C 3 N 4 (2).

[0059] Change the proportioning of melamine and urea (specifically as shown in table 1), prepare g-C respectively according to the above-mentioned preparation conditions 3 N 4 (0), g-C 3 N 4 (1), g-C 3 N 4 (3), g-C 3 N 4 (4)(g-C 3 N 4 (1), g-C 3 N 4 (3), g-C 3 N 4 (4) with g-C 3 N 4 (2) The morphology and structure are similar):

[00...

Embodiment 2

[0067] Embodiment 2, preparation and degradation test of carbon nitride supported catalyst

[0068] 1. Carbon nitride catalyst (g-C 3 N 4 / WO 3 ) preparation

[0069] (1) Preparation of tungstic acid raw material: take 1g sodium tungstate dihydrate (Na 2 WO 4 2H 2 0) Dissolve in 50mL ultrapure water, stir vigorously for 15min, then add 1mL lactic acid, the colorless solution gradually turns light yellow, then vigorously stir for 15min, adjust pH with 3mol / L hydrochloric acid until the solution becomes yellow gel, At this time, the pH meter shows 0.6; continue to stir for 12 hours to obtain tungstic acid raw material.

[0070] (2) Preparation of g-C 3 N 4 / WO 3 :

[0071] Take 3mL tungstic acid and add it to a beaker filled with 50mL ultrapure water, stir evenly on a magnetic stirrer, then add about 1.4g of the above g-C 3 N 4 (2), then place the beaker on a magnetic stirrer and stir at 120°C for 1h (that is, stir until uniform under boiling conditions); then filter...

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Abstract

The invention provides a carbon nitride supported catalyst and a preparation method and application thereof. The preparation method of the carbon nitride supported catalyst comprises the following steps: adding a raw material comprising melamine and urea into a first solvent, heating and stirring until the first solvent is evaporated to dryness, carrying out first calcination treatment on the obtained solid product to prepare g-C3N4, uniformly mixing g-C3N4 and a tungstic acid raw material in a second solvent, then filtering and drying, and carrying out second calcination treatment on the dried product to obtain the carbon nitride supported catalyst. According to the preparation method, the carbon nitride supported catalyst with a specific structure and good catalytic activity can be prepared, and refractory organic matters in water can be efficiently degraded.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a carbon nitride-supported catalyst and its preparation method and application. Specifically, the carbon nitride-supported catalyst can be applied to the treatment of water bodies containing organic matter. Background technique [0002] The increase in demand and shortage of clean water caused by the rapid development of industrialization, population growth and long-term drought have become a worldwide problem. A large number of microorganisms and pollutants are discharged into the natural water cycle, resulting in increased water pollution. With the rapid development of global industrialization, industrial wastewater It has become the main source of water environment pollution. Studies have shown that industrial wastewater contains petroleum, ammonia nitrogen, sulfur, phenol, cyanide and other pollutants, as well as some trace organic pollutants that are difficult to biode...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/30C02F101/34
CPCB01J27/24C02F1/30C02F2305/10C02F2101/30C02F2101/345C02F2101/34B01J35/39B01J35/61B01J35/613B01J35/63B01J35/633B01J35/635
Inventor 王郁现任诺陈春茂
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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