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Preparation method of iron oxide/cuprous oxide photoelectric film

A photoelectric thin film, cuprous oxide technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of lack of bifunctional catalysts, scarcity of precious metals, and high cost , to achieve the effect of good photoelectric catalysis, good stability of active material and high repeatability

Pending Publication Date: 2020-08-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are: the existing photoelectric coating uses noble metals, which are relatively scarce, and the cost is high, and the problem of lack of bifunctional catalysts

Method used

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  • Preparation method of iron oxide/cuprous oxide photoelectric film
  • Preparation method of iron oxide/cuprous oxide photoelectric film
  • Preparation method of iron oxide/cuprous oxide photoelectric film

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of preparation method of iron oxide / cuprous oxide photoelectric thin film (flow process sees figure 2 ):

[0032] (1) Sonicate the iron sheet in acetone, ethanol, and deionized water for 30 minutes in sequence, dry it in the air, and perform electroetching in 0.1M ammonia water with a voltage of 8V and a time of 150s. Perform electro-etching pretreatment to obtain mesoporous active sites, ready for use;

[0033](2) Immerse the etched iron substrate in Fe 3+ Precursor solution, put it in a high-pressure reactor for hydrothermal film-forming reaction, after the reaction, take out the FTO conductive substrate for constant temperature calcination to obtain Fe 2 o 3 film;

[0034] Fe in this example 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ·6H 2 O), the mixed solution of urea and water; The concentration of ferric chloride hexahydrate is 0.15M, and the concentration of urea is 0.25M;

[0035] In the present embodiment, adopt hydrotherm...

Embodiment 2

[0041] A kind of preparation method of iron oxide / cuprous oxide photoelectric thin film (flow process sees figure 2 ):

[0042] (1) Sonicate the iron sheet in acetone, ethanol, and deionized water for 30 minutes in sequence, dry it in the air, and perform electroetching in 0.1M ammonia water with a voltage of 8V and a time of 150s. Perform electro-etching pretreatment to obtain mesoporous active sites, ready for use;

[0043] (2) Immerse the etched iron substrate in Fe 3+ Precursor solution, put it in a high-pressure reactor for hydrothermal film-forming reaction, after the reaction, take out the FTO conductive substrate for constant temperature calcination to obtain Fe 2 o 3 film;

[0044] Fe in this example 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ·6H 2 O), the mixed solution of urea and water; The concentration of ferric chloride hexahydrate is 0.15M, and the concentration of urea is 0.25M;

[0045] In the present embodiment, adopt hydrother...

Embodiment 3

[0051] A kind of preparation method of iron oxide / cuprous oxide photoelectric thin film (flow process sees figure 2 ):

[0052] (1) Sonicate the iron sheet in acetone, ethanol, and deionized water for 30 minutes in sequence, dry it in the air, and perform electroetching in 0.1M ammonia water with a voltage of 8V and a time of 150s. Perform electro-etching pretreatment to obtain mesoporous active sites, ready for use;

[0053] (2) Immerse the etched iron substrate in Fe 3+ Precursor solution, put it in a high-pressure reactor for hydrothermal film-forming reaction, after the reaction, take out the FTO conductive substrate for constant temperature calcination to obtain Fe 2 o 3 film;

[0054] Fe in this example 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ·6H 2 O), the mixed solution of urea and water; The concentration of ferric chloride hexahydrate is 0.15M, and the concentration of urea is 0.25M;

[0055] In the present embodiment, adopt hydrother...

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Abstract

The invention discloses a preparation method of an iron oxide / cuprous oxide photoelectric film, which is characterized by comprising the following steps: respectively carrying out ultrasonic treatmenton an iron sheet in acetone, ethanol and deionized water, and then carrying out electric etching in ammonia water; immersing an iron sheet in the Fe < 3 + > precursor solution, carrying out hydrothermal film-forming reaction, and then calcining at a constant temperature to obtain an iron sheet to which a Fe2O3 film is attached; and taking the precursor solution of Cu < 2 + > as an electrolyte, carrying out electro-deposition, taking the obtained iron sheet as a cathode, taking a platinum wire as a counter electrode and taking an Ag / AgCl electrode as a reference electrode, and carrying out constant-voltage electro-deposition on the Fe2O3 film of the obtained iron sheet in a water bath. According to the present invention, by forming the Z-scheme, the separation of the photo-induced electrons and the photo-induced holes is promoted, such that the film has the low overpotential of 230 mV at the temperature of 10 mA.cm <-2 >, the carbon dioxide conversion efficiency can achieve 16.92% at most, and the water photolysis speed can achieve 120 mmol / L.h at most.

Description

technical field [0001] The invention relates to a preparation method and preparation method of a double-functional iron oxide / cuprous oxide photoelectric thin film, which is mainly used for photoelectric catalysis of CO 2 In the reaction of reduction and water oxidation, it belongs to the technical field of photoelectric catalysis materials. Background technique [0002] The greenhouse effect and energy shortage are two major problems facing human society today. Burning of fossil fuels releases large amounts of CO into the atmosphere 2 , exacerbating the global warming effect. Therefore, how to make CO 2 How to keep the concentration in an acceptable range or how to reduce its rate of increase is a major problem we must face. With the increasing energy and environmental problems, all sectors of society pay close attention to CO 2 abatement, sequestration and capture efforts. will CO 2 As a kind of resource, it can be transformed into other high value-added chemicals t...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J37/10B01J37/34C25B11/06C25B1/04
CPCB01J23/745B01J23/002B01J37/348B01J37/10C25B11/04C25B1/04C25B1/55B01J35/33B01J35/39Y02E60/36
Inventor 张娜徐晨王航刘志福房永征刘玉峰
Owner SHANGHAI INST OF TECH
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