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Preparation method for TiO2 nanowire/ microflower photoanode with three-dimensional grading structure

A hierarchical structure, nanowire technology, applied in nanotechnology, electrodes, electrode shapes/types, etc., can solve problems such as the negative impact of the charge transfer process, and achieve the effects of low cost, simple process, and convenient recycling.

Inactive Publication Date: 2017-10-17
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, unlike conventional TiO 2 Nanoparticles compared to 1D TiO 2 Photoelectrode materials have relatively limited energy conversion efficiencies because their relatively small specific surface areas may negatively affect the charge transfer process

Method used

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  • Preparation method for TiO2 nanowire/ microflower photoanode with three-dimensional grading structure
  • Preparation method for TiO2 nanowire/ microflower photoanode with three-dimensional grading structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. SnO doped with fluorine 2 The transparent conductive glass was ultrasonically cleaned in isopropanol, ethanol, and ultrapure water for 10 minutes respectively. After the ultrasonic wave was completed, the fluorine-doped SnO 2 transparent conductive glass in N 2 Let it dry and set aside;

[0023] b. Use a graduated cylinder to measure 30mL of water and slowly add it to a reaction kettle with a volume of 100mL. Under constant stirring, add 30mL of HCl solution and stir evenly for 10 minutes to obtain a mixed solution;

[0024] c. Quickly add 0.5 mL of titanium isopropoxide to the mixed solution obtained in step b, and continue stirring for 20 minutes to obtain a mixed solution;

[0025] d. Fluorine-doped SnO cleaned by ultrasonic cleaning in step a 2 The transparent conductive glass is put into the mixed solution obtained in step c, and placed with the conductive side facing up;

[0026] e. Place the mixed solution obtained in step d in a high-pressure reactor at a...

Embodiment 2

[0029] a. SnO doped with fluorine 2 The transparent conductive glass was ultrasonically cleaned in isopropanol, ethanol, and ultrapure water for 10 minutes respectively. After the ultrasonic wave was completed, the fluorine-doped SnO 2 transparent conductive glass in N 2 Let it dry and set aside;

[0030] b. Use a graduated cylinder to measure 30mL of water and slowly add it to a reaction kettle with a volume of 100mL. Under constant stirring, add 30mL of HCl solution and stir evenly for 10 minutes to obtain a mixed solution;

[0031] c. Quickly add 0.6 mL of titanium isopropoxide to the mixed solution obtained in step b, and continue stirring for 20 minutes to obtain a mixed solution;

[0032] d. Fluorine-doped SnO cleaned by ultrasonic cleaning in step a 2 The transparent conductive glass is put into the mixed solution obtained in step c, and placed with the conductive side facing up;

[0033] e. Place the mixed solution obtained in step d in a high-pressure reactor at a...

Embodiment 3

[0036] a. SnO doped with fluorine 2 The transparent conductive glass was ultrasonically cleaned in isopropanol, ethanol, and ultrapure water for 10 minutes respectively. After the ultrasonic wave was completed, the fluorine-doped SnO 2 transparent conductive glass in N2 Let it dry and set aside;

[0037] b. Use a graduated cylinder to measure 30mL of water and slowly add it to a reaction kettle with a volume of 100mL. Under constant stirring, add 30mL of HCl solution and stir evenly for 10 minutes to obtain a mixed solution;

[0038] c. Quickly add 0.7 mL of titanium isopropoxide to the mixed solution obtained in step b, and continue stirring for 20 minutes to obtain a mixed solution;

[0039] d. Fluorine-doped SnO cleaned by ultrasonic cleaning in step a 2 The transparent conductive glass is put into the mixed solution obtained in step c, and placed with the conductive side facing up;

[0040] e. Place the mixed solution obtained in step d in a high-pressure reactor at a r...

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Abstract

The invention relates to a preparation method for a TiO2 nanowire / microflower photoanode with a three-dimensional grading structure. The method is completed by executing the steps of cleaning and drying of SnO2 transparent conductive glass doped with fluorine, nanocrystalline forming through a solvent-thermal method, product washing and post-treating calcination. Compared with a traditional preparation method for TiO2 nanocrystalline, the synthesis method of the TiO2 nanowire / microflower photoanode with the three-dimensional grading structure is simple, special process equipment is not needed, a surfactant or a template are not used, the production cost is low, the environment is friendly, and the material has the excellent photoelectric catalytic water-decomposition capacity through the formed three-dimensional grading structure. The TiO2 nanowire / microflower photoanode with the three-dimensional grading structure has the advantages that the electron transmission efficiency is high, the light absorption capacity is high, the specific surface area of electrochemical activity is large, and surface active sites are more, has the excellent photoelectric catalytic water-decomposition capacity and good light stability and has wide application prospects in the field of new energy development through artificial photosynthesis.

Description

technical field [0001] The invention belongs to the technical field of preparation of photoelectric catalytic nanomaterials, in particular to a TiO with a three-dimensional hierarchical structure 2 Preparation method of nanowire / microflower photoanode. Background technique [0002] The rapid development of industrialization and globalization and the rapid growth of population have caused serious energy crisis problems. Therefore, it is crucial to develop a technology that can generate new energy sources. Semiconductor photocatalysis technology is considered to be a very potential technology, which can effectively alleviate the energy crisis by utilizing abundant solar energy. Under the excitation of light with a certain wavelength, photogenerated electrons and holes will be generated on the semiconductor surface, followed by a series of redox reactions. Among them, photogenerated electrons have strong reducibility and can be used for photoreduction of water to produce H ...

Claims

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Application Information

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IPC IPC(8): C25B11/02C25B11/06C25B1/04B82Y40/00
CPCB82Y40/00C25B1/04C25B11/02C25B1/55C25B11/077Y02E60/36
Inventor 王传义段燕燕王富
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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