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ZnO nano-rod photo-anode and preparation method thereof, solar cell

A nanorod and photoanode technology, which is applied in the field of photoelectrodes, can solve the problems of limited use and unsuitability of single-component CdS, and achieve the effects of low cost, improved photoelectrochemical performance, and simple preparation methods

Inactive Publication Date: 2017-05-31
GUANGDONG REAL FAITH OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although CdS can absorb visible light well and the position of the band is also suitable for continuous oxidation and reduction reactions of water, single-component CdS is not suitable for photocatalytic decomposition due to its severe photocorrosion. water reaction
Due to the S in CdS 2- tends to react with photogenerated holes on the valence band of CdS in preference to water, while S 2- , SO 3 2- , S 2 o 3 2- Plasma is an indispensable component for CdS materials used as photocatalytic functions, and its use is limited

Method used

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  • ZnO nano-rod photo-anode and preparation method thereof, solar cell
  • ZnO nano-rod photo-anode and preparation method thereof, solar cell
  • ZnO nano-rod photo-anode and preparation method thereof, solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Follow the steps below to prepare ZnO nanorod photoanodes:

[0038] S1. Growth of ZnO nanorods

[0039] Dissolve zinc acetate in an ethanol solution to make a ZnO seed precursor with a concentration of 20mM, spin-coat the ITO glass substrate at a speed of 2000rpm. for 30s at ambient temperature, and place the ITO glass substrate in a Heat on the heating plate for 5~12min, then hang it upside down in a reaction vessel filled with an aqueous solution of zinc nitrate (75mM) and hexamethylenetetramine (50mM), heat and react at 90°C for 3 hours, then remove from the growth solution , rinsed with ethanol and deionized and then dried to obtain ZnO nanorods.

[0040] Growth of S2, CdS coating layer

[0041] The precursor material of CdS was dissolved in the ethanol solution of cadmium nitrate tetrahydrate (0.5M) and thiourea (0.5M), and spin-coated on the surface of ZnO nanorods at the speed of 2000rpm. Place on a heating plate at 90°C and heat until a thin yellow film is fo...

Embodiment 2

[0050] Follow the steps below to prepare ZnO nanorod photoanodes:

[0051] S1. Growth of ZnO nanorods

[0052] Dissolve zinc acetate in an ethanol solution to make a ZnO seed precursor with a concentration of 15mM. Spin-coat on the ITO glass substrate at a speed of 2000rpm. at ambient temperature for 30s, and place the ITO glass substrate on a heating plate at 180°C Heated above for 12min, then turned upside down and suspended in a reaction vessel filled with an aqueous solution of zinc nitrate (70mM) and hexamethylenetetramine (60mM), heated and reacted at 100°C for 2 hours, removed from the growth solution, and washed with ethanol and After deionized washing and drying, ZnO nanorods were obtained.

[0053] Growth of S2, CdS coating layer

[0054] Dissolve the precursor material of CdS in the ethanol solution of cadmium nitrate tetrahydrate (0.3M) and thiourea (1M), and spin-coat the surface of ZnO nanorods at a speed of 2000rpm. at ambient temperature for 30s, and place th...

Embodiment 3

[0058] Follow the steps below to prepare ZnO nanorod photoanodes:

[0059] S1. Growth of ZnO nanorods

[0060] Dissolve zinc acetate in an ethanol solution to make a ZnO seed precursor with a concentration of 30mM, spin-coat the ITO glass substrate at a speed of 2000rpm. for 30s at ambient temperature, and place the ITO glass substrate on a heating plate at 220°C Heated for 6 minutes, then turned upside down and suspended in a reaction vessel filled with an aqueous solution of zinc nitrate (90mM) and hexamethylenetetramine (80mM), heated at 82°C for 4 hours, removed from the growth solution, and washed with ethanol and After deionized washing and drying, ZnO nanorods were obtained.

[0061] Growth of S2, CdS coating layer

[0062] The precursor material of CdS was dissolved in the ethanol solution of cadmium nitrate tetrahydrate (0.6M) and thiourea (0.3M), and spin-coated on the surface of ZnO nanorods at the speed of 2000rpm. Place on a heating plate at 90°C and heat until...

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Abstract

The invention belongs to the field of photo-anodes, and discloses a ZnO nano-rod photo-anode of which the structure is NiO / CdS / ZnO. The invention also discloses a preparation method of the ZnO nano-rod photo-anode. The preparation method comprises the following steps: S1, preparing a ZnO nano-rod with a hydrothermal method; S2, coating the surface of the ZnO nano-rod with CdS to form a CdS / ZnO structure; and S3, sedimentating NiO on the CdS / ZnO structure to form a NiO / CdS / ZnO composite structure. According to the nano photo-electrode composite material disclosed by the invention, the absorption range of a solar spectrum can be broadened, the performance of the photo-electrode material used for photo-catalytic electrolysis water is improved, the preparation method is simple, and particularly, a laminated material coated through spin-coating is relatively low in cost, energy-saving and environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of photoelectrodes, in particular to a ZnO nanorod photoanode, a preparation method thereof, and a solar battery. Background technique [0002] Solar energy is the source of all fossil energy and renewable energy on the earth. Solar energy is a clean energy, renewable and non-toxic. In the future, solar energy is expected to directly replace fossil energy. Although nature can store solar energy in the form of chemical bonds through photosynthesis, we need a more efficient method to solve the energy crisis. Photocatalytic water splitting has great hope to make a huge contribution to solving the energy crisis. This method It uses semiconductor materials that can absorb light and convert energy at the same time to carry out the photocatalytic water splitting reaction, and finally store solar energy in the form of H-H, the simplest hydrogen chemical bond. However, the efficiency is not too high due to the easy and rapid ...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2036H01G9/2054Y02E10/542Y02P70/50
Inventor 王恺孙小卫刘皓宸张晓利徐冰郝俊杰
Owner GUANGDONG REAL FAITH OPTO
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