Mesoporous graphite carbon nitride/palladium composite material, preparation method and application thereof

A composite material and carbon nitride-like technology, which is applied in the field of material science to achieve the effects of low cost, few steps and simple preparation process

Inactive Publication Date: 2016-11-02
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few reports on research in this area

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  • Mesoporous graphite carbon nitride/palladium composite material, preparation method and application thereof
  • Mesoporous graphite carbon nitride/palladium composite material, preparation method and application thereof
  • Mesoporous graphite carbon nitride/palladium composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A mesoporous g-C 3 N 4 / Pd composite preparation method, the steps are as follows:

[0027]First, 10g of melamine powder was calcined at 600°C for 2 hours, and after cooling down to room temperature, 2g of yellow block g-C was obtained. 3 N 4 .

[0028] Put 2g of yellow block g-C 3 N 4 After being ground into powder, it was added to 100 mL of concentrated sulfuric acid and stirred for 12 hours, then slowly added with 1 g of sodium nitrate and 4 g of potassium permanganate, and stirred at room temperature for 5 hours. The mixed solution was then diluted into 300 mL of deionized water and 67 mL of hydrogen peroxide was added. Finally, it was dialyzed to neutral and collected by centrifugation to obtain white g-C 3 N 4 .

[0029] will collect the white g-C 3 N 4 Add to 1L methanol / water (V / V=1 / 1) solution, ultrasonic treatment for 10 hours; then disperse the system in 3000min -1 Centrifuge for 10 minutes to remove undispersed precipitates, and dry in vacuum at ...

Embodiment 2

[0032] A mesoporous g-C 3 N 4 / Pd composite preparation method, the steps are as follows:

[0033] First, 20g of melamine powder was calcined at 600°C for 2 hours, and after cooling down to room temperature, 4.5g of yellow blocky g-C was obtained. 3 N 4 .

[0034] 4.5g of yellow block g-C 3 N 4 After being ground into powder, it was added to 225mL of concentrated sulfuric acid and stirred for 15 hours, then slowly added 3g of sodium nitrate and 12g of potassium permanganate, and stirred at room temperature for 8 hours. The mixed solution was then diluted into 675 mL of deionized water and 150 mL of hydrogen peroxide was added. Finally, it was dialyzed to neutral and collected by centrifugation to obtain white g-C 3 N 4 .

[0035] will collect the white g-C 3 N 4 Add to 2.25L ethanol / water (V / V=2 / 1) solution, ultrasonic treatment for 15 hours; then disperse the system in 3000min -1 Centrifuge for 10 minutes to remove undispersed precipitates, and dry in vacuum at 40...

Embodiment 3

[0038] A mesoporous g-C 3 N 4 / Pd composite preparation method, the steps are as follows:

[0039] First, 30g of melamine powder was calcined at 600°C for 2 hours, and after cooling down to room temperature, 7g of yellow block g-C was obtained. 3 N 4 .

[0040] 7g of yellow block g-C 3 N 4 After being ground into powder, it was added to 350mL of concentrated sulfuric acid and stirred for 24 hours, then slowly added 7g of sodium nitrate and 35g of potassium permanganate, and stirred at room temperature for 10 hours. The mixed solution was then diluted into 1050 mL of deionized water and 233 mL of hydrogen peroxide was added. Finally, it is dialyzed to neutrality and collected by centrifugation.

[0041] will collect the white g-C 3 N 4 Add to 3.5L isopropanol / water (V / V=3 / 1) solution, ultrasonic treatment for 20 hours; -1 Centrifuge for 10 min to remove the undispersed precipitate, and dry in vacuum at 40°C for 12 h to obtain 6.5 g of off-white solid powder, which is ...

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Abstract

The invention discloses a mesoporous graphite carbon nitride/palladium composite material, preparation method and application thereof. A carrier of the composite material is mesoporous g-C3N4, and an active component is Pd nanoparticles with particle size being 10-20 nm. Capacity of the Pd nanoparticles is 1.0-10% of total mass of the composite material. The preparation method comprises the following steps: firstly calcining to obtain blocky g-C3N4, carrying out oxidization and ultrasonic treatment to obtain the mesoporous g-C3N4, and finally loading noble metal Pd so as to obtain the target composite material. The composite material has larger specific surface area, and any other sacrificial template is not needed, thus being more beneficial to loading of the Pd nanoparticles. The g-C3N4/Pd composite material which is applied as a catalyst for reduction reaction of p-nitrophenol shows high catalytic activity.

Description

technical field [0001] The invention relates to a composite material, in particular to a mesoporous g-C 3 N 4 / Pd composite material, belongs to the field of materials science. Background technique [0002] With the maturity of nanomaterial synthesis technology, noble metal nano-Pd catalysts have attracted extensive attention from researchers due to their high-efficiency catalytic performance, small size, and high surface activity, and their application range is also expanding. However, the traditional homogeneous nano-Pd catalysts have disadvantages such as easy agglomeration, easy loss and difficult recovery in liquid phase reactions, which seriously restrict their practical application and improvement of catalytic performance. Immobilizing nano-Pd catalysts with catalytic activity is an important means to solve the above problems. In recent years, many types of supports such as metal oxides, inorganic silica gel, and polymers have been applied to support homogeneous na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24A62D3/37
CPCB01J27/24A62D3/37A62D2101/26A62D2101/28B01J35/006
Inventor 刘想赵晓华朱蕾石秋忠杨晔朱建军张伟党
Owner ZHENJIANG COLLEGE
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