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Preparation method for iron-doped tungsten trioxide photoelectrode

A tungsten trioxide and iron doping technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of difficult to control the morphology of materials, complex equipment experimental procedures, hindering general application, etc., to achieve large-scale industrial production, The effect of simple experimental equipment and low cost

Inactive Publication Date: 2012-09-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods not only require high temperature, high vacuum, complicated equipment, and strict experimental procedures, but also have poor reproducibility and difficulty in controlling the morphology of substances, which greatly hinders their general application.

Method used

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  • Preparation method for iron-doped tungsten trioxide photoelectrode
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  • Preparation method for iron-doped tungsten trioxide photoelectrode

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preparation example Construction

[0016] The preparation method of iron-doped tungsten trioxide photoelectrode comprises the following steps:

[0017] 1) Preparation of amorphous tungsten oxide film: 0.0025~0.0100mol of Na 2 WO 4 Dissolve in 50mL of distilled water, add 0.25~1.00mL of 30% H 2 o 2 Solution, then add 30mL of isopropanol, stir for 1 minute to get 2 o 7 2- After the solution, use 2mol / L perchloric acid or nitric acid to adjust the content of W 2 o 7 2- The pH value of the solution is 1.10~1.40, add distilled water to contain W 2 o 7 2- solution to a volume of 100mL, to obtain a clear electrolyte; with ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the saturated calomel electrode as the reference electrode, placed in the electrolyte for electrodeposition, relative to the calomel electrode The cathode potential is -0.4~-0.6V, and the deposition time is 60 minutes to obtain an amorphous tungsten oxide film, which is dried for later use; ...

Embodiment 1

[0021] 1) Preparation of amorphous tungsten oxide film: 0.0025mol of Na 2 WO 4 Dissolve in 50mL of distilled water, add 0.25mL of 30% H 2 o 2 Solution, then add 30mL of isopropanol, stir for 1 minute to get 2 o 7 2- After the solution, use 2mol / L perchloric acid to adjust the content of W 2 o 7 2- The pH value of the solution is 1.10, add distilled water to contain W 2 o 7 2- solution to a volume of 100mL, to obtain a clear electrolyte; with ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the saturated calomel electrode as the reference electrode, placed in the electrolyte for electrodeposition, relative to the calomel electrode The cathode potential is -0.4V, and the deposition time is 60 minutes to obtain an amorphous tungsten oxide film, which is dried for later use;

[0022] 2) Iron doping by impregnation method: place the amorphous tungsten oxide film obtained in step 1) in 0.005mol / L Fe(NO 3 ) 3 Immerse in ...

Embodiment 2

[0025] 1) Preparation of amorphous tungsten oxide film: 0.0100mol of Na 2 WO 4 Dissolve in 50mL of distilled water, add 1.00mL of 30% H 2 o 2 Solution, then add 30mL of isopropanol, stir for 1 minute to get 2 o7 2- After the solution, use 2mol / L nitric acid to adjust the content of W 2 o 7 2- The pH value of the solution is 1.40, add distilled water to contain W 2 o 7 2- solution to a volume of 100mL, to obtain a clear electrolyte; with ITO conductive glass as the working electrode, the platinum electrode as the counter electrode, and the saturated calomel electrode as the reference electrode, placed in the electrolyte for electrodeposition, relative to the calomel electrode The cathode potential is -0.6V, and the deposition time is 60 minutes to obtain an amorphous tungsten oxide film, which is dried for later use;

[0026] 2) Iron doping by impregnation method: place the amorphous tungsten oxide film obtained in step 1) in 0.005mol / L Fe(NO 3 ) 3 Immerse in the so...

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Abstract

The invention discloses a preparation method for an iron-doped tungsten trioxide photoelectrode. The preparation method comprises the following steps: firstly, preparing an amorphous tungsten oxide film: feeding an ITO (Indium Tin Oxide) conductive glass as a work electrode, a platinum gauze electrode as a counter electrode and a saturated calomel electrode as a reference electrode into electrolyte for electrodeposition to obtain the amorphous tungsten oxide film and drying the amorphous tungsten oxide film for later use; secondly, doping iron by using an impregnating method: feeding the amorphous tungsten oxide film obtained in the first step into 0.005mol / L Fe(NO3)3 solution and impregnating for 20-40 minutes to obtain an iron-doped tungsten oxide film, taking out the iron-doped tungsten oxide film and flushing the iron-doped tungsten oxide film with distilled water and drying the iron-doped tungsten oxide film in air; and thirdly, calcining: feeding the iron-doped tungsten trioxide photoelectrode in the second step into a muffle furnace, calcining the iron-doped tungsten trioxide photoelectrode at high temperature of 450DEG C for 3 hours, cooling the calcined iron-doped tungsten trioxide film at room temperature and then taking out to obtain the iron-doped tungsten trioxide photoelectrode. The photoelectric conversion efficiency and the photoelectric catalytic activity of the iron-doped tungsten trioxide photoelectrode are remarkably improved; the adopted experiment equipment is simple and easy to operate; and the used raw materials are abundant in natural word and low in cost and also have the advantages of environment friendliness and the like.

Description

technical field [0001] The invention relates to a method for preparing an iron-doped tungsten trioxide photoelectrode, which belongs to the technical field of preparation of inorganic photoelectrode materials, and specifically relates to a method for preparing an iron-doped tungsten trioxide photoelectrode, which has a relatively high photoelectric current under simulated sunlight and a relatively high photoelectricity to dyes. Preparation method of catalytically active iron-doped tungsten trioxide photoelectrode. Background technique [0002] Since the beginning of the 20th century, human industrial civilization has developed rapidly, and the resulting energy crisis and environmental pollution have become urgent problems to be solved. Therefore, the development of clean, low energy consumption, high efficiency, energy conversion technology and pollution treatment technology that can realize industrial production is the goal that scientists and governments pursue and pay att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25D9/04
Inventor 刘润刘丽英王萍徐铸德许宜铭
Owner ZHEJIANG UNIV
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