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Fe2O3/TiO2 composite photocatalytic film layer with three-dimensional nano sheet structure and preparation method and application thereof

A technology of composite photocatalysis and sheet structure, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve good industrial application prospects, wide range of photoresponse, The effect of high specific surface area

Active Publication Date: 2020-02-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it solves the problem of photocatalytic recycling, which provides the possibility of putting it into practical application

Method used

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  • Fe2O3/TiO2 composite photocatalytic film layer with three-dimensional nano sheet structure and preparation method and application thereof
  • Fe2O3/TiO2 composite photocatalytic film layer with three-dimensional nano sheet structure and preparation method and application thereof
  • Fe2O3/TiO2 composite photocatalytic film layer with three-dimensional nano sheet structure and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Titanium substrate pretreatment: the titanium substrate is sequentially water-milled with 220#, 400#, 1000#, 2000#, 5000# sandpaper to a smooth surface, and then ultrasonically cleaned with absolute ethanol and distilled water;

[0027] (2) Preparation of plasma electrolytic oxidation carrier film: prepare electrolyte solution A containing 14 g / L sodium phosphate, 2 g / L sodium tungstate, 8 g / L potassium ferrocyanide and solvent distilled water; ) The pretreated substrate is connected to the anode of the DC power supply, and the stainless steel sheet is used as the cathode. Plasma electrolytic oxidation is performed in the reaction solution A. The reaction voltage is 360V and the reaction time is 15 minutes to obtain porous Fe 2 O 3 / TiO 2 Composite photocatalytic film;

[0028] (3) Hydrothermal treatment: prepare reaction solution B containing 0.5 M sodium hydroxide and deionized water; combine the porous Fe obtained in step (2) 2 O 3 / TiO 2 The film layer and the reactio...

Embodiment 2

[0031] (1) Titanium substrate pretreatment: the titanium substrate is sequentially water-milled with 220#, 400#, 1000#, 2000#, 5000# sandpaper to a smooth surface, and then ultrasonically cleaned with absolute ethanol and distilled water;

[0032] (2) Preparation of plasma electrolytic oxidation carrier film: prepare electrolyte solution A containing 14 g / L sodium phosphate, 2 g / L sodium tungstate, 8 g / L potassium ferrocyanide and solvent distilled water; ) The pretreated substrate is connected to the anode of the DC power supply, and the stainless steel sheet is used as the cathode. Plasma electrolytic oxidation is performed in the reaction solution A, the reaction voltage is 360V, and the reaction time is 15 minutes to obtain porous Fe 2 O 3 / TiO 2 Composite photocatalytic film;

[0033] (3) Hydrothermal treatment: prepare reaction solution B containing 0.5 M sodium hydroxide and deionized water; combine the porous Fe obtained in step (2) 2 O 3 / TiO 2 The film layer and reaction s...

Embodiment 3

[0036] (1) Titanium substrate pretreatment: the titanium substrate is sequentially water-milled with 220#, 400#, 1000#, 2000#, 5000# sandpaper to a smooth surface, and then ultrasonically cleaned with absolute ethanol and distilled water;

[0037] (2) Preparation of plasma electrolytic oxidation carrier film: prepare electrolyte solution A containing 14 g / L sodium phosphate, 2 g / L sodium tungstate, 8 g / L potassium ferrocyanide and solvent distilled water; ) The pretreated substrate is connected to the anode of the DC power supply, and the stainless steel sheet is used as the cathode. Plasma electrolytic oxidation is performed in the reaction solution A, the reaction voltage is 360V, and the reaction time is 15 minutes to obtain porous Fe 2 O 3 / TiO 2 Composite photocatalytic film;

[0038] (3) Hydrothermal treatment: prepare reaction solution B containing 0.5 M sodium hydroxide and deionized water; combine the porous Fe obtained in step (2) 2 O 3 / TiO 2 The film layer and reaction s...

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Abstract

The invention discloses a Fe2O3 / TiO2 composite photocatalytic film layer with a three-dimensional nano sheet structure and a preparation method and application thereof. The preparation method comprises the following steps: (1) gradually polishing a titanium substrate to be smooth by using abrasive paper, and then carrying out ultrasonic cleaning; (2) preparing a reaction solution A by using sodiumphosphate, sodium tungstate, potassium ferrocyanide and deionized water; connecting the substrate treated in the step (1) to an anode of a direct-current power supply, taking a stainless steel sheetas a cathode, and carrying out plasma electrolytic oxidation treatment in the reaction solution A to prepare a porous Fe2O3 / TiO2 composite film layer; and (3) preparing a reaction solution B by usingsodium hydroxide and deionized water; placing the composite film layer prepared in the step (2) in the reaction solution B for hydrothermal reaction to prepare the composite photocatalytic film layer.As a photocatalyst, the film layer is large in specific surface area and wide in light response range, thus has excellent photocatalytic effect.

Description

Technical field [0001] The invention relates to the field of composite photocatalytic films, in particular to an Fe with a three-dimensional nano-sheet structure 2 O 3 / TiO 2 Composite photocatalytic film and its preparation method and application. Background technique [0002] Titanium dioxide is an excellent photocatalytic material, but it only has a catalytic effect in the ultraviolet region with a wavelength of less than 387nm, and its photocatalytic efficiency still needs to be further improved. Many researchers doped Fe 2 O 3 Method for TiO 2 Modification is carried out to expand its light response range and improve photocatalytic activity. But traditional powdered TiO 2 Photocatalysts still have the problems of cumbersome recovery and difficult separation. These problems lead to powdered TiO 2 It is not conducive to actual application. [0003] Plasma electrolytic oxidation technology is a new type of economical, efficient, green and environmentally friendly surface treatme...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J35/10B01J35/02C02F1/30C02F101/30
CPCB01J23/745C02F1/30C02F2101/40C02F2101/308C02F2305/10B01J35/40B01J35/60B01J35/61B01J35/39
Inventor 陈砺杜万鑫严宗诚
Owner SOUTH CHINA UNIV OF TECH
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