A photocatalytic film for electrochemically treating phosphorus-molybdenum sulfide co-doped iron oxide and its preparation method and application

A photocatalytic thin film, electrochemical technology, applied in the direction of chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of poor stability of photocatalytic thin film and limited promotion effect, and achieve low cost, catalytic The effect of excellent performance and simple preparation process

Active Publication Date: 2019-08-27
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method utilizes the electrodeposition method to deposit MoS 2 Doping onto the iron oxide photocatalytic film can increase the photocurrent and photocatalytic activity to a certain extent, but the improvement effect is limited; and the prepared photocatalytic film has poor stability

Method used

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  • A photocatalytic film for electrochemically treating phosphorus-molybdenum sulfide co-doped iron oxide and its preparation method and application
  • A photocatalytic film for electrochemically treating phosphorus-molybdenum sulfide co-doped iron oxide and its preparation method and application
  • A photocatalytic film for electrochemically treating phosphorus-molybdenum sulfide co-doped iron oxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] E-Fe of this embodiment 2 o 3 -Pi-MoS 2Photocatalytic thin films were prepared by the following methods:

[0064] (1) with Fe 2+ The precursor solution was used as the electrolyte, and the electrochemical workstation was used for electrodeposition with a three-electrode system, that is, the conductive glass (FTO) substrate after cleaning and drying was used as the working electrode, the graphite electrode was used as the counter electrode, and the Ag / AgCl electrode was used. As a reference electrode, it is impregnated in a phosphate buffer solution after electrodeposition, dried in a vacuum oven, and then calcined at a constant temperature to obtain Fe 2 o 3 - Pi film;

[0065] Fe in this example 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 ...

Embodiment 2

[0094] The wastewater to be treated in this embodiment is wastewater containing phenol, wherein the initial concentration of phenol is 10 mg / L.

[0095] The E-Fe that the present embodiment makes based on embodiment 1 2 o 3 -Pi-MoS 2 The treatment method of the phenol-containing wastewater of the photocatalytic film, the treatment process is as follows:

[0096] (S1) adjusting the pH value of the phenol-containing wastewater to be treated to 7.2;

[0097] by dropwise addition of 1M H 2 SO 4 solution or 1M NaOH solution to adjust the pH value of phenol-containing wastewater.

[0098] (S2) Performing photoelectrocatalytic treatment of the phenol-containing wastewater after adjusting the pH value. The photopositive electrode used in photocatalytic treatment includes a conductive substrate and E-Fe coated on the surface of the conductive substrate. 2 o 3 -Pi-MoS 2 Photocatalytic thin film (the effective area of ​​the film is 2cm×2cm), and the cathode is a titanium sheet w...

Embodiment 3

[0105] Same as Example 2, the difference is that the processing conditions are different. In this embodiment, it is carried out under pure electric and pure light conditions to study the E-Fe 2 o 3 -Pi-MoS 2 Phenol degradation of visible photocatalytic thin films under different light conditions.

[0106] Figure 10 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.

[0107] Such as Figure 10 As shown, after reacting for 5h, E-Fe 2 o 3 -Pi-MoS 2 The effect of thin-film photocatalytic degradation of phenol is significantly better than that of pure photocatalysis (12.81%) or electrocatalysis (26.32%), and the removal rate of phenol by photocatalysis is 93.73%, and th...

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Abstract

A preparing method of electrochemically treated phosphorus-molybdenum sulfide codoped ferric oxide photocatalytic film is disclosed. The method includes (1) electrodepositing a Fe<2+> precursor solution onto an electrically conductive substrate, soaking the obtained substrate in a phosphoric acid buffer solution, and then performing calcination to obtain Fe2O3-Pi film; (2) constructing MoS2 through a hydrothermal process to obtain Fe2O3-Pi-MoS2 film; and (3) preparing E-Fe2O3-Pi-MoS2 film through electrochemical treatment. The photocatalytic film prepared by the method including electrodepositing is uniform and good in stability, active components are not liable to peel off, and the catalyst has a stable surface state and many active sites. The photocatalytic film has a high photo-inducedelectron-hole separating efficiency and good photoelectrocatalysis activity. The invention also discloses the photocatalytic film prepared by the method, and applications of the film in phenol-containing wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of photoelectric catalysis materials, in particular to a novel photocatalytic thin film of electrochemically treating phosphorous-molybdenum sulfide co-doped iron oxide with high efficiency visible light response and its preparation method and application. Background technique [0002] Energy is the foundation of human survival and development. With the depletion of fossil fuel resources, the energy problem, as one of the major problems facing mankind, needs to be solved urgently. According to the 2016 BP World Energy Statistical Yearbook, the consumption of the three major fossil fuels, oil, coal and natural gas, is increasing year by year and all of them are non-renewable. For the survival and development of future generations, the need to find new and renewable energy sources is becoming more and more urgent, and the development of clean energy is of great significance for protecting the environment and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J27/19B01J37/02B01J37/08B01J37/10B01J37/34C02F1/30C02F101/34
CPCC02F1/30B01J27/0515B01J27/19B01J37/0201B01J37/08B01J37/10B01J37/348C02F2101/345C02F2305/10B01J35/39
Inventor 丛燕青张同同丁雯琛周鑫宇张宁张轶
Owner ZHEJIANG GONGSHANG UNIVERSITY
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