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Preparation method and application of iron oxide@biomass carbon fiber@pda-pvdf photo-Fenton composite beads

A biomass carbon and iron oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of poor catalyst stability, loss of active metals, and difficult operation. and other problems, to achieve the effects of improving stability, degrading organic pollutants, and simple and convenient preparation methods

Active Publication Date: 2021-07-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two great challenges in the heterogeneous photo-Fenton reaction process: (i) the powdery photo-Fenton catalyst is difficult to recover and difficult to operate in practical applications; (ii) due to the serious Loss, poor catalyst stability

Method used

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  • Preparation method and application of iron oxide@biomass carbon fiber@pda-pvdf photo-Fenton composite beads
  • Preparation method and application of iron oxide@biomass carbon fiber@pda-pvdf photo-Fenton composite beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of FCF composite photo-Fenton catalyst

[0030] Weigh the dried cattail in a crucible, transfer it to a tube furnace, and calcinate it at 800°C for 3h with a heating rate of 5°C / min, take it out after natural cooling, and obtain CF for use; take 0.3g CF and 1mmol FeSO 4 ·7H 2 O was dispersed in 35 mL of deionized water and shaken at room temperature for 12 h; after drying, the obtained solid was transferred to a tube furnace and calcined at 850 °C for 3 h to obtain the FCF composite photo-Fenton catalyst.

[0031] (2) Preparation of FCF@pDA-PVDF photo-Fenton composite beads

[0032] First, disperse 0.6g dopamine powder and 6g PVDF powder in 300mL Tris-HCl buffer solution, then add 10mL ethanol, and adjust the pH of the solution to 8.5, and stir the mixture vigorously for 6h to complete the self-polymerization of polydopamine on the surface of PVDF powder. Finally, filter, wash and dry to obtain pDA-PVDF powder. Weigh 0.05g of FCF, 2g of pDA-PVDF powde...

Embodiment 2

[0034] Under the condition that other conditions are kept constant, a comparative test is established as follows: when preparing FCF composite photo-Fenton catalyst, take 0.3gCF and 1mmol FeSO 4 ·7H 2 O was dispersed in 35 mL deionized water and shaken at room temperature for 12 h; after drying, the obtained solid was transferred to a tube furnace, and the FCF composite photo-Fenton catalyst was obtained by changing the calcination temperature to 550 °C and calcining for 3 h.

Embodiment 3

[0036] Under the condition that other conditions are kept unchanged, the comparative experiment is established as follows: when making FCF composite photo-Fenton catalyst, by changing CF and FeSO 4 ·7H 2 O ratio to examine the loading of iron oxides, take 0.3g CF and 3mmol FeSO 4 ·7H 2 O was dispersed in 35 mL deionized water, shaken at room temperature for 12 h; after drying, it was calcined at 850 °C for 3 h to obtain the FCF composite photo-Fenton catalyst.

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Abstract

The invention belongs to the technical field of material preparation and environmental pollution control, and provides a method for preparing iron oxide@biomass carbon fiber@pDA-PVDF photo-Fenton composite beads. The preparation method is as follows: Step 1, preparing iron oxide@ Biomass carbon fiber composite photo-Fenton catalyst; step 2, preparation of pDA‑PVDF powder; step 3, preparation of photo-Fenton composite beads based on phase inversion technology and dopamine self-polymerization technology. The invention uses pDA-PVDF beads as the carrier of the photo-Fenton catalyst, which can not only fix the powder catalyst, which is beneficial to practical application, but also can effectively inhibit the loss of iron ions and improve the stability of the catalytic system. The method has the advantages of simple synthesis and high degradation efficiency.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental pollution control, and relates to a preparation method and application of iron oxide@biomass carbon fiber@pDA-PVDF photo-Fenton composite beads that efficiently degrade methyl orange. Background technique [0002] Azo dyes refer to dyes that contain one or more azo groups (-N=N-) and are connected with at least one aromatic structure. Azo dyes have the characteristics of various colors, simple process, low production cost and strong dyeing ability, so they are widely used in the dyeing of textiles, paper, leather, plastics and other products, and are also used in food and cosmetics. Although azo dyes are widely used, some azo dyes will produce 24 kinds of carcinogenic aromatic amine compounds after reduction and cleavage. If they are absorbed by the human body, they will seriously threaten the health of the human body. Especially when used in textiles, clothing and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J31/06B01J35/06B01J37/08C02F1/30C02F1/72C02F101/38
CPCB01J23/745B01J31/069B01J35/004B01J35/06B01J37/084C02F1/30C02F1/722C02F1/725C02F2101/308C02F2101/38C02F2305/026C02F2305/10
Inventor 李彬榕孟敏佳吴春笃崔颜华郑健
Owner JIANGSU UNIV
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