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Preparation method of tungsten oxide-cuprous oxide heterojunction photoelectrode material as well as product thereof and application thereof

A cuprous oxide, tungsten oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of expensive reference electrodes, the influence of tungsten oxide films, problems such as high energy consumption, to achieve the effect of easy mass production, large-scale mass production, and simple and easy-to-control preparation process

Inactive Publication Date: 2019-01-18
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a photoanode material, tungsten oxide still has the following problems: slow carrier transfer at the interface, high recombination rate, etc.
[0005] However, when using electrochemical deposition of suboxide, a variety of chemical reagents will be added, which will easily affect the in-situ grown tungsten oxide film, and it is difficult to control related parameters in the large-scale preparation process. The reference electrode is expensive and consumes a lot of energy. limits its further application

Method used

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  • Preparation method of tungsten oxide-cuprous oxide heterojunction photoelectrode material as well as product thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After cutting the commercially available FTO glass, it was ultrasonicated with acetone and isopropanol for 15 minutes, rinsed with alcohol and deionized water, and dried with a nitrogen gun;

[0027] Weigh 0.2g of potassium oxalate and 2g of sodium tungstate, dissolve them in 50mL of deionized water, stir magnetically at room temperature at a speed of 1000r / min for 1 hour, slowly add 10mL of 2M hydrochloric acid and continue stirring for 10 minutes, and clean the mixed solution The final FTO glass pieces were transferred to the reaction kettle together, reacted at 160ºC for 24 hours, and took out after natural cooling; rinsed alternately with deionized water and absolute ethanol, and dried at 50ºC;

[0028] Put the dried sample into the magnetron sputtering chamber, and the background vacuum is 10 -5 After the order of Pa, adjust the working pressure to 3Pa with argon and oxygen at a ratio of 4:1; use a copper target to reactively sputter Cu with a thickness of 10nm at ...

Embodiment 2

[0031] After cutting the commercially available FTO glass, it was ultrasonicated with acetone and isopropanol for 15 minutes, rinsed with alcohol and deionized water, and dried with a nitrogen gun;

[0032] Weigh 0.2g of potassium oxalate and 2.2g of sodium tungstate, dissolve them in 50mL of deionized water, stir magnetically at room temperature at a speed of 800r / min for 1 hour, slowly add 12mL of 2M hydrochloric acid and continue stirring for 10 minutes, and dissolve the mixed solution The cleaned FTO glass slides were transferred to the reaction kettle together, reacted at 140ºC for 18 hours, and taken out after natural cooling; alternately rinsed with deionized water and absolute ethanol, and dried at 40ºC;

[0033] Put the dried sample into the magnetron sputtering chamber, and the background vacuum is 10 -5 After the order of Pa, adjust the working pressure to 4Pa according to the ratio of argon and oxygen to 4.5:1; use a copper target to reactively sputter Cu with a th...

Embodiment 3

[0035] After cutting the commercially available FTO glass, it was ultrasonicated with acetone and isopropanol for 15 minutes, rinsed with alcohol and deionized water, and dried with a nitrogen gun;

[0036] Weigh 0.2g of potassium oxalate and 2.4g of sodium tungstate, dissolve them in 50mL of deionized water, stir magnetically at room temperature at a speed of 1200r / min for 1 hour, slowly add 8mL of 2M citric acid and continue stirring for 10 minutes, and mix The FTO glass slides cleaned by the solution were transferred to the reaction kettle together, reacted at 120ºC for 24 hours, took out after natural cooling; rinsed alternately with deionized water and absolute ethanol, and dried at 60ºC;

[0037] Put the dried sample into the magnetron sputtering chamber, and the background vacuum is 10 -5 After the order of Pa, adjust the working pressure to 3Pa with argon and oxygen at a ratio of 5:1; use a copper target to reactively sputter Cu with a thickness of 15nm at a power of 20W...

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Abstract

The invention relates to a preparation method of a tungsten oxide-cuprous oxide heterojunction photoelectrode material as well as a product thereof and application thereof. A two-step process is adopted to prepare tungsten oxide-cuprous oxide heterojunction, and tungsten oxide is grown on FTO in situ through a hydrothermal method by controlling reaction time, solution acidity and alkalinity, temperature and the like; a magnetic-control reaction technology is adopted, so that a cuprous oxide film with certain thickness is grown on the tungsten oxide through copper target sputtering reaction bycontrolling the content of oxygen gas in working gas, so that the tungsten oxide-cuprous oxide heterojunction photoelectrode material with excellent photocurrent density can be obtained. The technicalscheme can greatly reduce application of a chemical reagent, can effectively reduce energy consumption, and is excellent in photoelectric performance; moreover, the preparation process is simple andeasily controlled, the repeatability is strong, and large-scale batch production is easy to realize.

Description

technical field [0001] The invention belongs to the field of nano-optoelectronic materials and energy, and relates to a preparation method of a tungsten oxide-cuprous oxide heterojunction photoelectrode material and its product and application, which have excellent photoelectrochemical properties. Background technique [0002] In today's increasingly serious energy and environmental problems, photoelectrochemical cells based on photolysis of water to hydrogen production technology can use solar energy to decompose water into hydrogen photocatalysis technology, and realize the conversion of light energy into hydrogen energy, which is of great significance to the acquisition of new energy . Its core is to obtain high-efficiency photocatalyst materials. Practical studies have confirmed that ideal photocatalytic materials for colleges and universities should meet the following characteristics: wide absorption spectrum, high carrier mobility, long carrier lifetime, high chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/02B01J35/00
CPCB01J23/002B01J23/888B01J35/00B01J35/30B01J35/39
Inventor 何丹农卢静涂兴龙葛美英白仕亨李砚瑞金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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