Visible-light-responsive iron oxide/cuprous oxide photocatalytic film and preparation method thereof

A photocatalytic film, cuprous oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the high cost and scarcity of precious metals, limited quantity, The inherent activity of the active site is poor and other problems, to achieve the effect of good photoelectric catalytic activity, high repeatability, and unfavorable peeling

Pending Publication Date: 2020-07-03
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the high cost and scarcity of noble metals, the limited number of active sites of layered double hydroxides (LDHs) and the inherent poor activity of active sites

Method used

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  • Visible-light-responsive iron oxide/cuprous oxide photocatalytic film and preparation method thereof
  • Visible-light-responsive iron oxide/cuprous oxide photocatalytic film and preparation method thereof
  • Visible-light-responsive iron oxide/cuprous oxide photocatalytic film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing a visible light-responsive iron oxide / cuprous oxide photocatalytic film, the specific steps are:

[0030] (1) Sonicate the FTO conductive glass in acetone, ethanol, and deionized water respectively, dry them in 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;

[0031] (2) Immerse the FTO conductive substrate in Fe 3+ Precursor solution, put it in a high-pressure reactor for hydrothermal film-forming reaction, the hydrothermal reaction time is 15h, and the reaction temperature is 120°C. After the reaction, the conductive substrate is washed with deionized water and dried. Put it into a muffle furnace and calcinate at a constant temperature of 450 ° C for 2 hours to obtain Fe 2 o 3 thin film; among them, Fe 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ·6H 2 O), the mix...

Embodiment 2

[0034] This embodiment provides a method for preparing a visible light-responsive iron oxide / cuprous oxide photocatalytic film, the specific steps are:

[0035] (1) Sonicate the FTO conductive glass in acetone, ethanol, and deionized water respectively, dry them in air, and perform electroetching in 0.1M ammonia water with a voltage of 10V and a time of 150s. Perform electro-etching pretreatment to obtain mesoporous active sites, ready for use;

[0036] (2) Immerse the FTO conductive substrate in Fe 3+ The precursor solution was placed in a high-pressure reactor for hydrothermal film-forming reaction. The hydrothermal reaction time was 12 hours and the reaction temperature was 120°C. After the reaction, the conductive substrate was washed with deionized water. After drying, put it into a muffle furnace, and calcine at a constant temperature of 500 ° C for 2 hours to obtain Fe 2 o 3 thin film; among them, Fe 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ...

Embodiment 3

[0039] This embodiment provides a method for preparing a visible light-responsive iron oxide / cuprous oxide photocatalytic film, the specific steps are:

[0040] (1) Sonicate the FTO conductive glass in acetone, ethanol, and deionized water respectively, dry them in air, and perform electroetching in 0.1M ammonia water with a voltage of 10V and a time of 150s. Perform electro-etching pretreatment to obtain mesoporous active sites, ready for use.

[0041] (2) Immerse the FTO conductive substrate in Fe 3+ Precursor solution, put it in a high-pressure reactor for hydrothermal film-forming reaction, the hydrothermal reaction time is 12h, and the reaction temperature is 150°C. After the reaction, the conductive substrate is washed with deionized water and dried. Put it into a muffle furnace and calcinate at a constant temperature of 500 ° C for 3 hours to obtain Fe 2 o 3 thin film; among them, Fe 3+ The precursor solution is ferric chloride hexahydrate (FeCl 3 ·6H 2 O), the mi...

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Abstract

The invention discloses a preparation method of an iron oxide / cuprous oxide photocatalytic film. The preparation method comprises the following steps: (1) carrying out an electric etching activation pretreatment on FTO conductive glass for later use; (2) immersing the FTO obtained in the step (1) into an Fe<3+> precursor solution with a concentration of 0.05 to 0.6 M, carrying out a hydrothermal film forming reaction for 10 to 16 hours at a temperature of 100 to 160 DEG C, and then carrying out constant-temperature calcination for 2 to 5 hours at a temperature of 400 to 650 DEG C to obtain a Fe2O3 film; and (3) taking a precursor of a Cu <2+> solution as an electrolyte, taking the FTO on which array Fe2O3 grows in the step (2) as a cathode, carrying out constant-voltage electro-depositionin a range of -0.1 V to -1V for 6-600s, and carrying out electro-deposition on the Fe2O3 film to prepare the Fe2O3 / Cu2O photocatalytic film. The Fe2O3 / Cu2O photo-electro-catalytic film is simple in preparation process, which is high in repeatability and low in economic cost. Under the action of photo-electricity, the catalyst has a low over-potential of 240 mV at 10 mA.cm<-2>. Two photo-catalystswith different energy band structures are combined to form a synergistic effect, and the catalytic performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric catalytic materials, in particular to a visible light responsive iron oxide / cuprous oxide photocatalytic film and a preparation method thereof. Background technique [0002] The greenhouse effect and energy shortage are two major problems facing human society today, and seeking efficient and harmless environmentally friendly pollution control technologies has become an urgent issue for human beings to solve. 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 material...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J37/34B01J37/10
CPCB01J23/745B01J23/002B01J37/342B01J37/10B01J37/348B01J35/33B01J35/39
Inventor 徐晨刘志福李佳佳房永征刘玉峰张娜
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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