Preparation method for novel magnetic induction C3N4/Fe3O4 composite film and application of composite film

A technology of C3N4 and composite membranes, which is applied in chemical instruments and methods, chemical/physical processes, and water treatment of special compounds, etc., can solve problems such as catalyst embedding, achieve degradation, improve degradation efficiency, and improve photocatalytic performance.

Inactive Publication Date: 2018-06-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantage is that this method provides a new idea to improve the degradation efficiency of traditional blended catalytic membranes from a novel perspective, and solves the problem of catalyst embedding in blended membranes to a certain extent, thereby making the catalysts effective. Use light source to achieve the purpose of effectively degrading environmental wastewater

Method used

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  • Preparation method for novel magnetic induction C3N4/Fe3O4 composite film and application of composite film
  • Preparation method for novel magnetic induction C3N4/Fe3O4 composite film and application of composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0034](1)C 3 N 4 / Fe 3 o 4 Preparation of composite catalyst

[0035] Weigh 20g of melamine in a crucible, dry it, transfer it to a muffle furnace, and calcinate it at 550°C for 4h with a heating rate of 2.3°C / min, take it out after natural cooling, and grind it into powder with a mortar to obtain C 3 N 4 Photocatalyst, stand-by; take 2.3gC 3 N 4 Dispersed in a mixture of 600mL ethanol and water (1:3), ultrasonicated to obtain C 3 N 4 Dispersion; take 0.27g FeCl 3 ·6H 2 O and 0.099 g FeCl 2 4H 2 O was dissolved in 20ml deionized water and poured into C 3 N 4 In the dispersion liquid, stir at 80 degrees Celsius for 1 hour, then immediately inject 10ml of ammonia water, and stir for 1 hour to obtain C 3 N 4 / Fe 3 o 4 composite photocatalyst.

[0036] (2) Magnetic induction C 3 N 4 / Fe 3 o 4 Catalytic membrane prepared from composite materials

[0037] Take 0.1g C 3 N 4 / Fe 3 o 4 Add the composite photocatalyst to 17.9g DMSO, ultrasonically disperse for...

Embodiment 2

[0039] Under the condition that other conditions are kept unchanged, establish a comparative test as follows: make C 3 N 4 / Fe 3 o 4 When composite catalyst, take 2.3g C 3 N 4 Dispersed in 40mL of water, ultrasonically dissolved to obtain C 3 N 4 Dispersion; take 1.622g FeCl 3 ·6H 2 O and 0.596g FeCl 2 4H 2 O was dissolved in 20 ml deionized water and added to the above C 3 N 4 In the dispersion liquid, stir at 80 degrees Celsius for 1 hour, then immediately inject 10ml of ammonia water, and stir for 1 hour to obtain C 3 N 4 / Fe 3 o 4 composite photocatalyst.

Embodiment 3

[0041] Preparation of magnetically induced C 3 N 4 / Fe 3 o 4 When the composite material photocatalytic film (other conditions remain unchanged), by changing the magnetic induction time (30min, 60min, 180min) to investigate the influence of induction time on the migration process of the catalyst, as well as the effect on the photocatalytic degradation effect; preparation of magnetic induction C 3 N 4 / Fe 3 o 4 When the composite material photocatalytic film (other conditions remain unchanged), by changing the amount of PVDF added (1g, 3g, 4g) to investigate the influence of the viscosity coefficient of the casting solution on the magnetic field induction, so as to further explore the optimal Matching. The catalytic membrane constructed under magnetic induction has a degrading effect of more than 90% on methyl orange.

[0042] from figure 2 It can be seen that the composite material has Fe 3 o 4 and C 3 N 4 characteristic peaks, proving the successful synthesis of ...

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Abstract

The invention belongs to the technical fields of material preparation and environmental pollution improvement, and provides a preparation method for a novel magnetic induction C3N4 / Fe3O4 composite film. The preparation method comprises the following steps: step 1, preparing a C3N4 / Fe3O4 composite photocatalyst; and step 2, performing magnetic induction on a C3N4 / Fe3O4 composite material to preparethe photocatalytic film. The catalytic film prepared by utilizing the magnetic induction method provided by the invention can effectively overcome the shortcoming that a catalyst is easy to imbed ina traditional blend film, achieves high-efficiency catalytic degradation of target pollutants, and 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 relates to a novel magnetic induction C 3 N 4 / Fe 3 o 4 Composite membranes are used to improve the degradation efficiency of traditional blended membranes, specifically a C 3 N 4 / Fe 3 o 4 Preparation method and application of composite material photocatalytic film. Background technique [0002] Azo dyes are the most widely used synthetic dyes in the printing and dyeing process of textiles and clothing. They are used for dyeing and printing of various natural and synthetic fibers, and are also used for coloring of paints, plastics, rubber, etc. Under special conditions, it can decompose and produce more than 20 kinds of carcinogenic aromatic amines, causing irreversible damage to organisms. In the process of production and application, about 10%-15% of dyes are discharged into the environment without treatment and may seriously affect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/0033B01J35/004C02F1/30C02F2101/40C02F2305/10
Inventor 李彬榕孟敏佳颜丙杰崔颜华冯永海
Owner JIANGSU UNIV
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