Preparation method and application of Pd/C3N4@biomass carbon fiber composite film

A C3N4, fiber composite technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of catalytic performance and degradation efficiency decline, catalytic membrane porosity specific surface area Small, organic polymer membrane incompatibility and other problems, to achieve the effect of improving photocatalytic performance, improving photocatalytic efficiency, and large membrane pore size

Active Publication Date: 2018-10-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the combination of nano-catalytic materials and membrane technology through blending will lead to agglomeration of catalytic materials, low dispersion and incompatibility with organic polymer membranes, which will result in a decline in cata

Method used

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  • Preparation method and application of Pd/C3N4@biomass carbon fiber composite film
  • Preparation method and application of Pd/C3N4@biomass carbon fiber composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Pd / C 3 N 4 @Preparation of biomass carbon fiber composite photocatalyst

[0029] Weigh 2g cattail, wash and dry, soak in saturated urea solution, transfer to a tube furnace after drying, and calcinate at 550°C for 2h under the protection of nitrogen, with a heating rate of 2.3°C / min, take it out after natural cooling to obtain C 3 N 4 @CF, to be used;

[0030] Take 1g C 3 N 4 @CF composite photocatalyst is dispersed in 100ml water for use, take 0.01g PdCl 2 Dissolve in 10ml of water and add to the above dispersion liquid and stir for 2h, then dissolve 1g of sodium borohydride in 20ml of water, and add to the above dispersion liquid, stir for 30 minutes and let it stand for 2h to obtain Pd loaded C 3 N 4 @CF composite photocatalyst.

[0031] (2)Pd / C 3 N 4 @Preparation of biomass carbon fiber composite membrane

[0032] Select 0.05g of the above composite material and disperse it in 20ml of DMF, then dissolve 2g of PAN in the solution, and stir for 4h to ob...

Embodiment 2

[0034] Preparation C 3 N 4 When @CF, keep other conditions unchanged, study C by changing the concentration of urea solution3 N 4 Effect on the catalytic performance of biomass carbon materials; preparation of Pd-supported C 3 N 4 When @CF compound photocatalyst, choose the weighed C 3 N 4 @CF and PdCl 2 The masses are: 1g / 0.2g and 2g / 0.2g, by adjusting the mass ratio of the two to examine the Pd loading for C 3 N 4 Effect of @CF composite catalytic materials on catalytic activity.

Embodiment 3

[0036] Preparation of Pd loaded C 3 N 4 @CF composite photocatalytic film (other conditions remain unchanged), by changing the amount of composite catalyst added (0.1g, 0.2g, 0.3g) to investigate the effect of the amount of composite catalyst on the adsorption degradation effect, screening the optimal amount; to ensure With other conditions unchanged, the viscosity of the casting solution is adjusted by changing the amount of PAN added (1g, 3g), thereby controlling the diameter of the polymer fiber of the composite membrane and adjusting the pore size. Finally choose the most matching ratio, making the constructed Pd / C 3 N 4 The degradation effect of @CF composite photocatalytic film on tetracycline reached more than 90% within 120min of visible light (λ>420nm) irradiation.

[0037] Such as figure 1 As shown, Pd nanoparticles grow uniformly on C 3 N 4 @CF surface, the loading of CN can be further characterized by XRD.

[0038] Such as figure 2 As shown, the peak of Pd...

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Abstract

The invention belongs to the technical field of material preparation and environmental pollution control, and provides a preparation method of a Pd/C3N4@biomass carbon fiber composite film. The preparation method comprises the following steps: step 1, preparing a Pd/C3N4@biomass carbon fiber composite photocatalyst; and step 2, preparing the Pd/C3N4@biomass carbon fiber composite photocatalytic film by an electrostatic spinning method. With use of high adsorbability of biomass carbon fibers, C3N4 and Pd nanoparticles are uniformly loaded on the surface, the separation efficiency of photogenerated electrons and holes is improved, at the same time, the inherent high-porosity structure of an electrostatic spinning membrane is combined, the efficient catalytic degradation of target pollutantsis achieved, and the preparation method has the advantages of simple synthesis, high degradation efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental pollution control, and specifically relates to a Pd / C 3 N 4 Preparation method and application of @biomass carbon fiber composite membrane. Background technique [0002] Tetracycline is a highly potent broad-spectrum antibiotic that is integral to maintaining human and animal health and treating a variety of diseases, including mycoplasma pneumonia and epidemic typhus. In addition, in some countries including the United States, tetracycline is also used as a growth promoter in large quantities and fed to animals. This causes the sustained release and environmental accumulation of tetracyclines, which has aroused widespread concern in the society. Tetracycline residues in the environment can selectively kill certain microorganisms, and can induce the production of some drug-resistant bacteria, thereby endangering human health and the balance of aquatic ecosystems. ...

Claims

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Application Information

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IPC IPC(8): B01D71/12B01D69/12B01D67/00B01J31/28C02F1/30C02F101/38
CPCB01D67/0079B01D69/12B01D71/12B01J31/28B01J35/004C02F1/30C02F2101/38
Inventor 孟敏佳颜丙杰李彬榕李毅冯永海
Owner JIANGSU UNIV
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