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A kind of iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film and its preparation method and application

A visible light, molybdenum sulfide technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory photocatalytic effect, and achieve high separation efficiency of photogenerated electrons and holes , cost reduction, good photoelectric catalytic activity

Active Publication Date: 2019-05-31
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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  • A kind of iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film and its preparation method and application
  • A kind of iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film and its preparation method and application
  • A kind of iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film and its preparation method and application

Examples

Experimental program
Comparison scheme
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] like 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 addition, ...

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Abstract

The invention discloses a preparation method of iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film: (1) using Fe 2+ The precursor solution is used as the electrolyte, electrodeposited on the conductive substrate and then calcined to obtain Fe 2 O 3 Thin film; (2) Add the above Fe 2 O 3 Film immersed in MoS 2 In the precursor solution, Fe is prepared by hydrothermal method 2 O 3 ‑MoS 2 Thin film; (3) Add the above Fe 2 O 3 ‑MoS 2 The film is placed on Cd 2+ In the precursor solution, Fe is produced by heating reaction 2 O 3 ‑MoS 2 -CdS visible light catalytic film. The present invention also includes the iron oxide-molybdenum sulfide-cadmium sulfide visible light catalytic film prepared by the above method and the application of the film in treating phenol-containing wastewater. The preparation process of the invention is simple, the repeatability is high, and the economic cost is low. Through the combination of three photocatalysts with different energy band structures, a synergistic effect is formed, which greatly improves the photocatalytic performance.

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 Patents(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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