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Two-dimensional MoS2 regulated and controlled photocatalyst as well as preparation method and application thereof

A photocatalyst, fe2o3 technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic efficiency and poor stability, so as to improve photocatalytic performance and prepare Simple and economical method with high repeatability

Active Publication Date: 2018-04-20
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of existing photocatalysts such as low catalytic efficiency and poor stability, and provide a two-dimensional MoS 2 regulated Fe 2 o 3 -MoS 2 / C 3 N 4 Photocatalytic thin film material and its preparation method and application, the composite photocatalytic material exhibits high photocatalytic activity and stability, and the preparation method is simple and economical

Method used

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  • Two-dimensional MoS2 regulated and controlled photocatalyst as well as preparation method and application thereof
  • Two-dimensional MoS2 regulated and controlled photocatalyst as well as preparation method and application thereof
  • Two-dimensional MoS2 regulated and controlled photocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0046] Fe in this example 2 o 3 -MoS 2 / C 3 N 4 The preparation method of photocatalytic thin film material comprises the following steps:

[0047] (1) Using a three-electrode system, with Fe 2+ The precursor solution was used as the electrolyte, the conductive glass (FTO, with a specification of 10mm×50mm×2mm) was used as the working electrode, the graphite electrode was used as the counter electrode, and the Ag / AgCl electrode was used as the reference electrode for electrodeposition; after the electrodeposition was completed, the After being dried naturally, the Fe 2 o 3 film;

[0048] Among them, before the electrodeposition, the conductive glass needs to be ultrasonically cleaned with acetone, absolute ethanol and deionized water in sequence, and then dried for later use.

[0049] 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 disti...

Embodiment 2

[0068] The waste water to be treated in this embodiment is phenol waste water, wherein the initial concentration of phenol is 10mg / L, and the treatment process is as follows:

[0069] Phenol wastewater was used as the treatment object for photocatalytic 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 / C 3 N 4 Thin film (prepared by Example 1), the cathode is a titanium sheet. Before photoelectric degradation, it is necessary to carry out dark adsorption treatment of phenol wastewater. After setting up the treatment device, stir the dark adsorption treatment for 30 minutes.

[0070] After the dark adsorption treatment, the light was turned on and the electricity was applied, the working voltage applied between the photocatalytic anode and the cathode was 2.5V, the light source was turned on, and the treatment was carried out under the condition of v...

Embodiment 3

[0074] Repeat the operation steps of embodiment 1 and 2, difference is to prepare Fe 2 o 3 -MoS 2 / C 3 N 4 In the process of photocatalytic thin film, in step (1), Fe 2+ Fe in the precursor solution 2+ The molar concentration is 0.2M.

[0075] Fe prepared under the conditions of this example 2 o 3 -MoS 2 / C 3 N 4 Photocatalytic thin film photoelectrochemical properties and the Fe obtained by the conditions of Example 1 2 o 3 -MoS 2 / C 3 N 4 Photocatalytic thin films are similar, relative to Fe 2 o 3 film, the Fe of this example 2 o 3 -MoS 2 / C 3 N 4 The photocurrent (that is, the current density) of the photocatalytic film is correspondingly increased by 50 times; the degradation rate of phenol is 90.8% under the condition of visible light.

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Abstract

The invention discloses a preparation method for a two-dimensional MoS2 regulated and controlled photocatalyst. The method comprises the following steps: (1) performing electrodeposition at the surface of a conductive substrate by using a Fe<2+> precursor solution as an electrolyte, and performing calcination treatment to obtain a Fe2O3 film; and (2) immersing the Fe2O3 film into a precursor solution of MoS2 and C3N4, performing electrodeposition, and performing constant-temperature calcination in an inert atmosphere to obtain a Fe2O3-MoS2 / C3N4 film. The invention also discloses the two-dimensional MoS2 regulated and controlled photocatalyst prepared by the above method and an application of the photocatalyst in treatment of phenol-containing wastewater. The preparation method provided bythe invention only adopts an electrodeposition method, the preparation process is simple, the repeatability is high, and the economic costs are lower. The invention also discloses the two-dimensionalMoS2 regulated and controlled photocatalyst prepared by the above method, the photoinduced electron-hole pair of the prepared Fe2O3-MoS2 / g-C3N4 film has high separation efficiency, the photoelectric performance is strong, and the stability is high.

Description

technical field [0001] The invention relates to the technical field of photoelectrocatalytic materials, in particular to a two-dimensional MoS 2 Tuned wide-spectrum thin-film photocatalyst and its preparation method and application. Background technique [0002] In today's industrialized age, environmental pollution and energy shortage are two major problems facing mankind, restricting the sustainable development of society and the environment. 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. Photocatalytic technology combines the advantages of photocatalytic technology and electrocatalytic technology, and provides a clean and effective method. It has broad application prospects in eliminating pollution and generating energy under the premise of utilizing a large amount of clean sunlight. . The key to this technology lies in the prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/34C02F1/30C02F1/461C02F101/34
CPCC02F1/30C02F1/46109B01J27/24B01J37/08B01J37/348C02F2001/46142C02F2101/345C02F2305/10B01J35/39B01J35/33
Inventor 丛燕青葛耀花张同同邵美玲毛剑飞
Owner ZHEJIANG GONGSHANG UNIVERSITY
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