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Method for using solar energy decomposing water to prepare hydrogen nanometer electrode

A nano-electrode and water-splitting technology, applied in chemical instruments and methods, catalyst activation/preparation, hydrogen production, etc., can solve problems such as poor light energy conversion efficiency, achieve reduced probability, high light conversion efficiency and light decomposition efficiency, and increase Effects of Photocatalytic Efficiency and Photowater Splitting Efficiency

Inactive Publication Date: 2008-03-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the poor light energy conversion efficiency at that time, it did not attract people's attention

Method used

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  • Method for using solar energy decomposing water to prepare hydrogen nanometer electrode

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: 500mg self-made TiO 2 The microspheres are dispersed into a mixed solution of ethanol: water = 2:1, an equal volume of 40 wt% polyethylene oxide aqueous solution is added, and the microspheres are uniformly dispersed by ultrasonic to prepare a pasty slurry. F-SnO 2 The glass is cut into 1cm×1.5cm base electrodes, cleaned with a special cleaning solution for conductive glass, ultrasonically cleaned with ethanol and acetone for 3 minutes, and dried with nitrogen. Treat with plasma for 2 minutes. The above slurry was spin-coated on F-SnO by spin-coating method 2 The surface was spin-coated at a rate of 1500 rpm. Then put the electrode into a muffle furnace and sinter at 450°C for 60 minutes. The prepared F-SnO 2 / TiO 2 The electrode is prepared as a photoelectrochemical cell as shown in Figure 2. In the photoelectrochemical cell, the base electrode 1 is used as the anode, the material of the cathode 5 is Pt wire, and 1 M potassium hydroxide (KOH) is the...

Embodiment 2

[0026] Example 2: 500mgTiO 2Nanoparticles (Degussa P25, composed of about 30% rutile and 70% anatase, particle size about 20 nm) were dispersed in ethanol: water (2:1) mixed solution, adding an equal volume of 40wt% polyoxygen Ethylene aqueous solution, ultrasonic dispersion, prepared into a paste slurry. F-SnO 2 The glass is cut into 1cm×1.5cm base electrodes, cleaned with a special cleaning solution for conductive glass, ultrasonically cleaned with ethanol and acetone for 3 minutes, and dried with nitrogen. Treat with plasma for 2 minutes. The above slurry was spin-coated on F-SnO by spin coating. 2 The surface was spin-coated at a rate of 1500 rpm. Then put the electrode into a muffle furnace for sintering at 450°C for 60 minutes. The prepared F-SnO 2 / TiO 2 (P25) The electrode is prepared into a photoelectrochemical cell as shown in Figure 2. In the photoelectrochemical cell, the base electrode 1 is used as the anode, the material of the cathode 5 is Pt wire, and th...

Embodiment 3

[0027] Example 3: 500 mg self-made TiO 2 The microspheres are dispersed into ethanol: water (2:1) mixed solution, and an equal volume of 40 wt% polyoxyethylene aqueous solution is added, and the microspheres are dispersed uniformly by ultrasonic to prepare a pasty slurry. F-SnO 2 The glass is cut into 1cm×1.5cm substrate electrodes, cleaned with a special cleaning solution for conductive glass, ultrasonically cleaned with ethanol and acetone for 3 minutes, blown dry with nitrogen, and treated with plasma for 2 minutes. The above slurry was coated on F-SnO by spin coating 2 The surface was spin-coated at a rate of 1500 rpm. Then put the electrode into a muffle furnace for sintering at 450°C for 60 minutes. Take out the electrode, drop 0.5 mole of hexamethylenetetramine and 0.5 mole of zinc nitrate on the surface of the electrode, each 2ml, spin coating after 5 minutes to shake off the excess solution, heat treatment in a 200 degree oven for 5 minutes, repeat the above operat...

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Abstract

The invention discloses a preparation art, which belongs to the preparation art of photo-hydrolysis nanometer electrode. Particularly, the invention relates to a preparation method, which utilizes solar energy for water decomposition and production of hydrogen nanometer electrode. The invention uses the synthetic titanium oxide nanometer microspheres and other semiconductor materials, such as zinc oxide , to construct lamellar nanometer electrode. The application of lamellar doping method accelerates an efficient separation of electron and cavity, the titanium oxide nanometer microsphere structure increases contact area of the electrode surface and the electrolyte, the material is provided with high light conversion efficiency and photolysis efficiency, which improve the photo-hydrolysis efficiency. The preparation method has a simple manufacturing process, which decreases the manufacturing difficulty of semiconductor nanometer composite material and simplifies the implementation process of the electrode. Thus, the invention has a potential application value.

Description

technical field [0001] The invention belongs to the preparation technology of photolytic water nanometer electrodes, in particular to a preparation method of nanometer electrodes for hydrogen production by decomposing water using solar energy. Background technique [0002] With the decreasing amount of fossil energy, it is an urgent need for people to seek a new type of energy with abundant reserves. Hydrogen energy is sometimes considered to be one of the most ideal secondary energy sources in the future because of its high efficiency and pollution-free. As an efficient and common way to produce hydrogen, the splitting of water has limited its development because it requires extra energy. With the utilization and development of solar energy resources, whether to use solar energy to split water to produce hydrogen has become a research hotspot in the field of hydrogen preparation. Hydrogen production from water splitting by solar energy is an endothermic reaction. The ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04B01J21/06B01J37/00
CPCY02E60/364Y02E60/36Y02P20/133
Inventor 李景虹卢鹉张昊王庚陈达
Owner TSINGHUA UNIV
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