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Preparation method of energy storage tungsten trioxide/strontium titanate/titanium dioxide nanometer composite film photoanode

A tungsten trioxide and nanocomposite technology, applied in the field of photoanode, can solve the problem of low photoelectric conversion efficiency, and achieve the effects of good cathodic protection, good photocathode protection and photoelectric conversion efficiency improvement.

Active Publication Date: 2017-06-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the rapid recombination of photogenerated electron-hole pairs and low photoelectric conversion efficiency are the reasons for TiO 2 Key issues to be solved in the application of semiconductor materials in photoelectrochemistry

Method used

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  • Preparation method of energy storage tungsten trioxide/strontium titanate/titanium dioxide nanometer composite film photoanode
  • Preparation method of energy storage tungsten trioxide/strontium titanate/titanium dioxide nanometer composite film photoanode
  • Preparation method of energy storage tungsten trioxide/strontium titanate/titanium dioxide nanometer composite film photoanode

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Experimental program
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Effect test

Embodiment 1

[0044] According to the concrete steps of above-mentioned technical scheme, prepare WO 3 / SrTiO 3 / TiO 2 Nanotube composite film photoanode, and test the photogenerated cathodic protection effect of the photoanode on 403 stainless steel.

[0045] Take a 0.1mm thick titanium foil as a sample (purity>99.7%), its length is 1.5cm, and its width is 1.0cm. Sequentially ultrasonic cleaning in acetone, absolute ethanol and deionized water for 30 min.

[0046] Preparation of TiO by Anodic Oxidation 2 Nanotube array membrane: 0.5wt% HF aqueous solution is used as electrolyte solution, titanium foil is used as anode, and platinum sheet is used as cathode. Apply a voltage of 20V and carry out anodic oxidation for 30min. After the reaction, wash with a large amount of deionized water and dry it for use.

[0047] SrTiO 3 / TiO 2 Preparation of nanotube composite film: the prepared surface was covered with TiO 2 The titanium foil of the nanotube array film was placed in a polytetrafl...

Embodiment 2

[0055] A 0.1 mm thick titanium foil was taken as a sample (purity>99.7%), which was 1.5 cm long and 1.0 cm wide. Sequentially ultrasonic cleaning in acetone, absolute ethanol and deionized water for 30 min.

[0056] Preparation of TiO by Anodic Oxidation 2 Nanotube array film: titanium foil is used as anode, platinum sheet is used as cathode, and 0.5wt% HF aqueous solution is used as electrolyte solution. Apply a voltage of 20V and carry out anodic oxidation for 30min. After the reaction, wash with a large amount of deionized water and dry it for use.

[0057] SrTiO 3 / TiO 2 Preparation of nanotube composite film: the prepared surface was covered with TiO 2 The titanium foil of the nanotube array film was placed in a polytetrafluoroethylene reaction kettle, and a 0.01mol / L Sr(COOH) 2Mix 40mL with 0.04mol / L KOH, react at 180°C for 60min, take out the sample and soak in 0.01mol / L HCl solution for 1min, rinse with a large amount of deionized water, dry and calcinate in a mu...

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Abstract

The invention discloses a preparation method of an energy storage tungsten trioxide / strontium titanate / titanium dioxide nanometer composite film photoanode, and relates to a photoanode. A titanium foil is used as a basal body for ultrasonic operation in acetone, anhydrous ethanol and de-ionized water; a titanium basal body sample is used as an anode; a platinum piece is used as a cathode; after the anode is oxidized, a prepared sample is cleaned and dried to obtain a TiO2 nanotube array film; the TiO2 nanotube array film is put in a polytetrafluoroethylene reaction kettle; mixed solution containing Sr(COOH)2 and KOH is added for hydrothermal reaction; the sample is taken out to dip in HCl solution for cleaning, drying and calcining; and a SrTiO3 / TiO2 composite film is obtained. The SrTiO3 / TiO2 composite film is used as a working electrode; the platinum piece and a saturated calomel electrode are used as an auxiliary electrode and a reference electrode; constant potential is applied to an electrolytic cell for electric deposition to prepare WO3 on the surface of the SrTiO3 / TiO2 composite film; and the sample is flushed by de-ionized water, and is calcined after drying to obtain the photoanode.

Description

technical field [0001] The present invention relates to a photoanode, in particular to an energy storage type tungsten trioxide / strontium titanate / titanium dioxide (WO 3 / SrTiO 3 / TiO 2 ) A method for preparing a nanocomposite film photoanode. Background technique [0002] Nano titanium dioxide (TiO 2 ) Semiconductors are widely used in the fields of photocatalysis, solar cells and metal corrosion protection due to their superior photoelectric properties. [1-3] . TiO 2 It can be used as a photoanode to provide photogenerated electrons to the metal connected to it under light conditions to achieve cathodic protection and inhibit metal corrosion. It is an important material used in photoelectrochemical anti-corrosion [4-5] . However, the rapid recombination of photogenerated electron-hole pairs and low photoelectric conversion efficiency are the reasons for TiO 2 Key issues to be addressed in semiconductor materials for photoelectrochemical applications. in TiO 2 In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C25D11/26C25D9/04
CPCC23F13/12C23F2213/20C25D9/04C25D11/26
Inventor 杜荣归梁燕官自超王海鹏
Owner XIAMEN UNIV
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