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Fe2O3-MoS2-CdS visible photocatalysis film, and preparation method and application thereof

A visible light and molybdenum sulfide technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of unsatisfactory photocatalytic effect and achieve high separation efficiency of photogenerated electrons and holes , Efficient use of solar energy, uniform film formation effect

Active Publication Date: 2017-08-08
合肥龙智机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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-CdS visible photocatalysis film, and preparation method and application thereof
  • Fe2O3-MoS2-CdS visible photocatalysis film, and preparation method and application thereof
  • Fe2O3-MoS2-CdS visible photocatalysis film, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] Fe in this example 2 o 3 -MoS 2 -The preparation method of CdS visible photocatalytic thin film comprises the following steps:

[0062] (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;

[0063] 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 e...

Embodiment 2

[0079] The wastewater to be treated in this embodiment is phenol wastewater, wherein the initial concentration of phenol is 10 mg / L.

[0080] The Fe that the present embodiment makes based on embodiment 1 2 o 3 -MoS 2 -The treatment method of the phenol-containing wastewater of CdS visible photocatalytic film, the treatment process is as follows:

[0081] (S1) adjusting the pH value of the phenol-containing wastewater to be treated to 6.3;

[0082] by dropwise addition of 1M H 2 SO 4 solution or 1M NaOH solution to adjust the pH value of phenol-containing wastewater.

[0083] (S2) Perform photocatalytic treatment after adjusting the pH value. The photoanode used in photocatalytic treatment includes a conductive substrate and Fe coated on the surface of the conductive substrate. 2 o 3 -MoS 2 - CdS visible photocatalytic thin film (the effective area of ​​the film is 2cm×2cm), and the cathode is a titanium sheet with the same effective area.

[0084] In the photocataly...

Embodiment 3

[0090] Same as Example 2, the difference is that the processing conditions are different. In this example, it was carried out under pure electric and pure light conditions to study Fe 2 o 3 -MoS 2 -Degradation of phenol by CdS visible photocatalytic film under different light conditions.

[0091] Figure 8 It is the comparison of the removal rate of phenol in the phenol-containing wastewater to be treated under pure electric conditions (EC), pure light conditions (PC) and photoelectric synergistic conditions (PEC), wherein the corresponding curves under the photoelectric synergistic conditions (PEC) conditions are the same as those in the examples 2 the same.

[0092] Such as Figure 8 As shown, after reacting for 5h, Fe 2 o 3 -MoS 2 -CdS film photocatalytic degradation of phenol is significantly better than pure photocatalysis (19.26%) or electrocatalysis (7.30%), photocatalytic phenol removal rate is 90.47%, photoelectric synergistic effect is remarkable. In additio...

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Abstract

The invention discloses a preparation method of a Fe2O3-MoS2-CdS visible photocatalysis 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) putting the Fe2O3-MoS2 film into the Cd<2+> precursor solution; performing heating reaction to obtain the Fe2O3-MoS2-CdS visible photocatalysis film. The invention also provides the Fe2O3-MoS2-CdS visible photocatalysis 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 an iron oxide-molybdenum sulfide-cadmium sulfide visible light 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 great chal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/34B01J37/10C02F1/30C02F101/34
CPCC02F1/30B01J27/0515B01J37/10B01J37/348C02F2305/10C02F2101/345B01J35/59B01J35/39Y02W10/37
Inventor 丛燕青张同同葛耀花姬云周鑫宇张宁王燕青金泽雨
Owner 合肥龙智机电科技有限公司
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