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Preparation method and application of heterojunction MoO3/ZnO photoelectrode film

A heterojunction and photoelectrode technology is applied in the field of photoelectrochemistry to achieve the effect of improving photoelectrochemical performance, improving transmission efficiency and high PEC performance

Pending Publication Date: 2022-06-07
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, no semiconductor can meet the above requirements at the same time

Method used

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  • Preparation method and application of heterojunction MoO3/ZnO photoelectrode film
  • Preparation method and application of heterojunction MoO3/ZnO photoelectrode film
  • Preparation method and application of heterojunction MoO3/ZnO photoelectrode film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A kind of heterojunction MoO 3 Preparation method of / ZnO photoelectrode thin film

[0026] (1) The preparation method is as follows

[0027] 1) Preparation of MoO by calcination 3 powder

[0028] 3g (NH 4 ) 6 Mo 7 O 24 Put it in a crucible, put it in a muffle furnace and calcine it in the air at 500°C for 4h to obtain MoO 3 powder.

[0029] 2) Preparation of ZnO powder by hydrothermal method

[0030] 0.24g Zn(C 2 H 3 O 2 ) 2 and 0.4g PVP were dissolved in 40mL DMF and 8mL distilled water, magnetically stirred for 20min, after mixing uniformly, slowly add 0.25M NaOH solution until the pH reached 10 and stop, after continuing magnetic stirring for 10min, transfer the obtained mixed solution to a high-pressure hydrothermal kettle , and then placed in an oven, heated at 140 °C for 90 min, the obtained product was centrifuged three times with acetone and ethanol respectively, and dried at 60 °C to obtain ZnO powder.

[0031] 3) Preparation of MoO 3 ...

Embodiment 2

[0038] Example 2 Heterojunction MoO 3 Application of / ZnO Photoelectrode Film

[0039] The pure MoO of Example 1 was 3 Thin Films and MoO 3 / ZnO photoelectrode films were tested for photoelectrochemical properties such as photocurrent and impedance.

[0040] All electrochemical experimental testing procedures were performed in an electrochemical workstation (Princeton Applied Research 2273) with a three-electrode system. The sample film is used as the working electrode, the platinum sheet is used as the counter electrode, the Ag / AgCl is used as the reference electrode, and the electrolyte is 0.1M NaSO 4 , the sample light irradiation area is 1cm 2 .

[0041] Photocurrent test: the light source is 300W xenon lamp, the bias voltage is 1.23Vvs.VRHE, the measured results are as follows figure 2 shown, the results show that the heterojunction MoO 3 The photocurrent of the / ZnO photoelectrode film is about 11.6 μA, and the MoO 3 The photocurrent of the photoelectrode film i...

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Abstract

The invention discloses a preparation method and application of a heterojunction MoO3 / ZnO photoelectrode film. The method comprises the following steps: putting cleaned conductive glass (FTO) into an acetone solution of MoO3, and obtaining a MoO3 film by adopting an electrophoretic deposition method. Putting ZnO into an acetone solution for ultrasonic dispersion, putting the obtained MoO3 thin film into the acetone solution of ZnO, and overlapping a layer of ZnO thin film on the MoO3 thin film by adopting an electrophoretic deposition method; and carrying out high-temperature annealing on the obtained product to obtain the MoO3 / ZnO heterojunction film. The MoO3 / ZnO photoelectrode film prepared by the invention is used for improving the photo-induced electron transmission capability of a MoO3 photoelectrode, so that the photoelectrochemical performance can be effectively improved, and the photocorrosion resistance of MoO3 is enhanced.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemistry, and in particular relates to a high-performance heterojunction MoO 3 Preparation method and application of ZnO photoelectrode thin film. Background technique [0002] As we all know, hydrogen is the most important and inexhaustible element in the universe. Due to its carbon-free nature and environmentally friendly combustion process, it is considered the greenest fuel composed of only hydrogen atoms. Not only does hydrogen exist in the universe, but it can generally be produced from water in a number of ways. Electrolysis is one of the most common techniques for producing hydrogen through a water splitting process. Sunlight can enhance this process environmentally by using photon energy in synergy with conventional electrolysis techniques for hydrogen production through a photoelectrochemical (PEC) process. In PEC hydrogen production, semiconductors are used to convert light ene...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/55C25B1/04
CPCC25B11/091C25B1/04C25B1/55Y02P20/133
Inventor 陶然张新新范晓星王彦欣肖永惠
Owner LIAONING UNIVERSITY
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