Fe2O3-MoS2-Cu2O photocatalyst film, and preparation method and application thereof

A technology of photocatalytic thin film and cuprous oxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems such as unsatisfactory photocatalytic effect, Achieve the effect of improving photocatalytic activity, film area control, and high separation efficiency

Active Publication Date: 2017-08-08
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] For how to improve the photocatalytic performance, various factors such as the electrical conductivity of different materials, band gap energy, and valence band (or conduction band) position will affect it. At present, most researches focus on the combination of two semiconductors. The catalytic effect is not satisfactory, and there are few studies on the co-combination of multiple semiconductors

Method used

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  • Fe2O3-MoS2-Cu2O photocatalyst film, and preparation method and application thereof
  • Fe2O3-MoS2-Cu2O photocatalyst film, and preparation method and application thereof
  • Fe2O3-MoS2-Cu2O photocatalyst film, and preparation method and application thereof

Examples

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preparation example Construction

[0054] Fe in this example 2 o 3 -MoS 2 -Cu 2 The preparation method of O photocatalytic film comprises the following steps:

[0055] (1) with Fe 2+ The precursor solution was used as the electrolyte, and the CHI660E electrochemical workstation was used for electrodeposition with a three-electrode system, that is, the conductive substrate conductive glass (FTO) after cleaning and drying was used as the working electrode, the graphite electrode was used as the counter electrode, and the Ag The / AgCl electrode is used as a reference electrode, and after it is naturally dried, it is calcined at a constant temperature to obtain Fe 2 o 3 film;

[0056] Fe in this implementation case 2+ The preparation method of the precursor solution is as follows: Weigh a certain amount of FeCl 2 4H 2 O dissolved in a certain volume of ethylene glycol and distilled water, Fe 2+ In the precursor solution, Fe 2+ The concentration is 0.02M, and the volume ratio of ethylene glycol to distill...

Embodiment 2

[0091] The wastewater to be treated in this embodiment is phenol wastewater, wherein the initial concentration of phenol is 10 mg / L.

[0092] Based on the Fe obtained in Example 1 of the present embodiment 2 o 3 -MoS 2 -Cu 2 The wastewater treatment method of O photocatalytic film, the treatment process is as follows:

[0093] The pH value of the wastewater to be treated is about 6, and it undergoes photoelectric catalytic degradation. The photocatalytic anode used in photocatalytic treatment includes a conductive substrate and Fe coated on the surface of the conductive substrate. 2 o 3 -MoS 2 -Cu 2 O photocatalytic film (made by embodiment 1), the cathode is a titanium sheet.

[0094] In the photocatalytic treatment in this embodiment, before the working voltage is applied to the photocatalytic electrode pair, the wastewater to be treated is also subjected to dark adsorption treatment, and the dark adsorption treatment time is 30 minutes.

[0095] The working voltage...

Embodiment 3

[0099] Repeat the operation steps of embodiment 1 and 2, difference is to prepare Fe 2 o 3 -MoS 2 -Cu 2 In the process of O photocatalytic thin film, step (1), Fe 2+ Fe in the precursor solution 2+ The source is ferrous sulfate, Fe 2+ The molar concentration is 0.2M.

[0100] Fe prepared under the conditions of this example 2 o 3 -MoS 2 -Cu 2 The photoelectrochemical properties of O photocatalytic film and the Fe prepared under the conditions of Example 1 2 o 3 -MoS 2 -Cu 2 O photocatalytic thin film is similar, compared with the Fe prepared in Comparative Example 1 2 o 3 film, the Fe of this example 2 o 3 -MoS 2 -Cu 2 The photocurrent (current density) of the O photocatalytic film is correspondingly increased by 8 times; the degradation rate of phenol is 85.5% under the condition of visible light.

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Abstract

The invention discloses a preparation method of a Fe2O3-MoS2-Cu2O photocatalyst film. The method comprises the following steps of (1) using a Fe<2+> precursor solution as an electrolyte; performing electrodeposition on a conducting substrate; then, performing roasting treatment to obtain a Fe2O3 film; (2) soaking the Fe2O3 film into a MoS2 precursor solution; preparing a Fe2O3-MoS2 film by a hydro-thermal method; (3) using a Cu2O precursor solution as an electrolyte; performing electrophoretic deposition on the Fe2O3-MoS2 film to prepare a Fe2O3-MoS2-Cu2O photocatalyst film. The invention also discloses the Fe2O3-MoS2-Cu2O photocatalyst film prepared by the method, and application of the film to treatment of phenol-containing wastewater. The preparation process is simple; the repeatability is high; in addition, the economic cost is lower. Through the combination of three photocatalysts with different energy belt structures, the synergic effect is achieved; the photocatalyst performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric catalytic materials, in particular to a visible light responsive iron oxide-molybdenum sulfide-cuprous oxide catalytic film and its preparation method and application. Background technique [0002] Nowadays, with the increasing energy and environmental problems, it has become an urgent task for human beings to seek efficient and harmless environmentally friendly pollution control technologies. Photoelectrocatalytic technology has attracted much attention due to its high efficiency, harmlessness, low energy consumption, and environmental friendliness. It has great potential in environmental purification and new energy development, and has demonstrated its excellent application prospects. The key to this technology lies in the preparation of efficient and stable photocatalytic films. However, the development of highly efficient and practically applicable photocatalytic materials is still a gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/885B01J35/06B01J37/34C02F1/30C02F101/34
CPCB01J23/885B01J35/004B01J35/065B01J37/348C02F1/30C02F2101/345C02F2305/10
Inventor 丛燕青葛耀花张同同张瀚斗张轶王齐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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