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Preparation method of cadmium telluride quantum dot sensitization nickel oxide photoelectrode

A technology of cadmium telluride quantum dots and electrodes, which is applied to electrodes, electrolysis process, energy input and other directions, can solve the problems of low cost, high price, low hydrogen production potential, etc., and achieves lower production cost, low cost and improved photocurrent Effect

Inactive Publication Date: 2015-03-25
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Noble metals such as Pt have very good catalytic activity, but due to their high price, it is difficult to use them on a large scale in industrial production. Therefore, it is very important to research and develop new photocathodes of non-noble metal materials with low cost, high activity and low hydrogen production potential.

Method used

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  • Preparation method of cadmium telluride quantum dot sensitization nickel oxide photoelectrode
  • Preparation method of cadmium telluride quantum dot sensitization nickel oxide photoelectrode
  • Preparation method of cadmium telluride quantum dot sensitization nickel oxide photoelectrode

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Embodiment 1

[0030] (1) Preparation of MPA-CdTe: Using tellurium powder as tellurium source, the molar ratio of sodium borohydride and tellurium powder is 2:1 to reduce tellurium powder to generate NaHTe, and use CdCl 2 2.5H 2 O is a cadmium source, mercaptopropionic acid is a stabilizer, and is dissolved in water and stirred at a molar ratio of Cd:MPA:Te=1:2.4:0.5, while adjusting the pH to about 11 with 1mol / L NaOH to obtain Cd Precursor. Add the prepared NaHTe and Cd precursor solution into the three-necked flask, stir and blow nitrogen for 20 minutes, add a condenser to the upper end of the three-necked flask, heat and reflux at 90°C, and the reaction time is preferably 5 hours. After the reaction is completed, wash with acetone , MPA-CdTe QDs were obtained after centrifugation.

[0031] (2) ITO conductive glass pretreatment: soak in acetone for 2 hours, soak in ethanol for 2 hours, then heat and reflux in KOH isopropanol solution for 15 minutes, take it out, wash it with deionized w...

Embodiment 2

[0036] Using CHI600 electrochemical workstation, with NiO / CdTe electrode as the working electrode, Pt mesh electrode as the counter electrode, Ag / AgCl as the reference electrode, placed at 0.30mol / L C 6 h 12 N 4 , 0.20mol / L KCl, 0.10mol / L HCl buffer solution, add 1.0×10 -3 mol / L NiCl 2 ·6H 2O was used as a cocatalyst, and it was placed in a sealed nitrogen atmosphere, irradiated under a xenon lamp with a wavelength greater than 400nm, and the photoelectrocatalytic hydrogen production experiment was carried out at a voltage of -0.643V. After the reaction finishes, detect the hydrogen generated in the reaction with thermal conductivity-gas chromatography, and use X-ray photoelectron spectroscopy (XPS) (such as Figure 8 , shown in 9) and X-ray crystal powder diffraction (XRD) (as Figure 10 Shown) and other analyzes show that quantum dots and nickel salt self-assemble under light to generate a photoelectrode loaded with nickel salt.

Embodiment 3

[0038] Using CHI600 electrochemical workstation, with NiO electrode as the working electrode, Pt mesh electrode as the counter electrode, Ag / AgCl as the reference electrode, placed at 0.30mol / L C 6 h 12 N 4 , 0.20mol / L KCl, 0.10mol / L HCl buffer solution, add 1.0×10 -3 mol / L NiCl 2 ·6H 2 O was used as a cocatalyst, and it was placed in a sealed nitrogen atmosphere, irradiated under a xenon lamp with a wavelength greater than 400nm, and the photoelectrocatalytic hydrogen production experiment was carried out at a voltage of -0.643V. After the reaction, the hydrogen generated in the reaction was detected by thermal conductivity-gas chromatography.

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Abstract

The invention discloses a preparation method of a cadmium telluride quantum dot sensitization nickel oxide photoelectrode. According to the preparation method of the cadmium telluride quantum dot sensitization nickel oxide photoelectrode, by taking cadmium telluride quantum dots as the photosensitizer and through a photoelectrochemical method, an efficient photoelectrode can be prepared for hydrogen production through photoelectrocatalysis decomposition. The preparation method of the cadmium telluride quantum dot sensitization nickel oxide photoelectrode can help produce the efficient, stable, low-cost, easily-synthesized photoelectrode without precious metal materials such as platinum for performing catalyzed hydrogen production.

Description

technical field [0001] The invention proposes a method for preparing a cadmium telluride quantum dot sensitized nickel oxide photoelectrode loaded with nickel salt, which belongs to the field of material science and technology and the field of photoelectric catalytic hydrogen production. Background technique [0002] The increasing severity of the global energy crisis has drawn the attention of countries all over the world in the research of new energy sources. Among them, hydrogen is considered to be the most ideal energy carrier because of its abundant sources, clean and pollution-free, and high-efficiency combustion. Hydrogen production by splitting water is one of the important methods to achieve large-scale production of hydrogen. Using solar energy to decompose water to produce hydrogen, and converting solar energy into chemical energy stored in hydrogen energy, provides a cheap and convenient way to obtain hydrogen. Semiconductor photoelectrodes are the key to photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCY02E60/36Y02P20/133
Inventor 董玉明毋瑞仙陆可钰蒋平平王光丽
Owner JIANGNAN UNIV
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