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BiIo sensitized BiIO/TiO2 composite electrode material, preparation method and application thereof

A composite electrode, mixed solution technology, applied in nanotechnology for materials and surface science, semiconductor/solid-state device manufacturing, circuits, etc. High, low visible light absorption efficiency, etc., to achieve practical and commercialization, broaden the spectral response range, and improve the photoelectric conversion efficiency.

Inactive Publication Date: 2016-11-23
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] Due to its superior properties, titanium dioxide has the characteristics of biological inertness, non-toxicity and light-free corrosion, and its low cost, wide resources and strong redox ability make it widely used in solar cells; but because TiO 2 The inherent bandgap width is wide (3.2eV), and it can only be excited by ultraviolet light (<380nm), so its utilization efficiency for visible light and sunlight is not high
In addition, TiO 2 Due to the high recombination rate of internal photogenerated electrons and holes or the limitation of the energy band structure, so alone TiO 2 It is difficult to absorb visible light, which limits its application in practical problems
It has been reported in the literature that TiO nanorod arrays were synthesized by hydrothermal method 2 , is a nanorod with a length of about 1 μm stacked by crystals. It has a large specific surface area, but its band gap width has not changed much, and the absorption efficiency of visible light is still not high.

Method used

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  • BiIo sensitized BiIO/TiO2 composite electrode material, preparation method and application thereof
  • BiIo sensitized BiIO/TiO2 composite electrode material, preparation method and application thereof
  • BiIo sensitized BiIO/TiO2 composite electrode material, preparation method and application thereof

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Embodiment

[0025] (1) BiIO / TiO sensitized by BiIO 2 The preparation method of the composite electrode material is as follows:

[0026] 1) TiO 2 Preparation of the nanorod array: 30 mL of hydrochloric acid with a concentration of 18% by volume and 0.5 mL of tetra-n-butyl titanate with a concentration of 98% by mass were mixed together, and stirred for 5 minutes to obtain a mixed solution. Transfer fluorine-doped tin dioxide conductive glass (its square resistance is 20 ohms) and 8mL of the above mixed solution to a high-pressure reactor (its inner lining volume is 15mL), and lean the conductive surface of the conductive glass against the inner lining of the reactor , under the condition of 150℃, hydrothermal reaction for 20h, cooled to room temperature, rinsed with deionized water, dried, and the obtained intermediate product was named TiO 2 nanorod arrays.

[0027] 2) BiIO sensitization treatment: After dispersing 0.002mol of bismuth nitrate pentahydrate into 20mL of ethylene glycol, ...

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Abstract

The invention relates to a BiIO sensitized BiIO / TiO2 composite electrode material, a preparation method and application thereof. The technical scheme comprise the steps of: mixing hydrochloric acid with tetra-N-butyl titanate, transferring a mixture solution and a conductive carrier to a high pressure reaction vessel, performing the hydrothermal reaction, cooling the solution to the room temperature, performing washing and drying, and obtaining TiO2 nano rod arrays; dispersing bismuth nitrate pentahydrate into glycol, slowly adding potassium iodide, performing agitation at the room temperature, and obtaining a Bi(OCH2CH2OH)I2 solution; and dipping the TiO2 nano rod arrays in the Bi(OCH2CH2OH)I2 solution, taking the TiO2 nano rod arrays out, and washing and drying the TiO2 nano rod arrays. The BiIO / TiO2 composite electrode material synthesized by a hydrothermal synthesis method has a high specific surface area and good response in a visible light, and has the characteristics of wide applicability and good stability, simple technology, easy operation, and low cost, and facilitates the popularization and application of the material in the industrial production.

Description

technical field [0001] The invention belongs to the technical field of battery materials, in particular to a BiIO / TiO sensitized by BiIO 2 Composite electrode materials and their preparation methods and applications. Background technique [0002] Due to its superior properties, titanium dioxide has the characteristics of biological inertness, non-toxicity and light-free corrosion, and its low cost, wide resources and strong redox ability make it widely used in solar cells; but because TiO 2 The intrinsic bandgap width is relatively wide (3.2eV), and it can only be excited by ultraviolet light (<380nm), so its utilization efficiency for visible light and sunlight is not high. In addition, TiO 2 Due to the high recombination rate of internal photogenerated electrons and holes or the limitation of the energy band structure, so alone TiO 2 It is difficult to absorb visible light, which limits its application in practical problems. It has been reported in the literature th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H10K71/60H10K85/30H10K30/151H10K2102/00Y02E10/549
Inventor 周欣张宇李迎原春雪宋溪明
Owner LIAONING UNIVERSITY
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