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Cuprous oxide nanometer pn homojunction material of core-shell structure and preparation method thereof

A core-shell structure, homojunction technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problem of unreported homojunction arrays, and achieve excellent photoelectrochemical performance, tight coating, and crystal lattice. Small mismatch effect

Active Publication Date: 2017-10-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently Cu 2 Homojunction arrays of O-based nanocore-shell structures are hardly reported

Method used

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  • Cuprous oxide nanometer pn homojunction material of core-shell structure and preparation method thereof
  • Cuprous oxide nanometer pn homojunction material of core-shell structure and preparation method thereof
  • Cuprous oxide nanometer pn homojunction material of core-shell structure and preparation method thereof

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Experimental program
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Embodiment 1

[0020] 1) Substrate pretreatment: Cut the copper sheet into 1cm×2cm size, strip the surface, place it in an ultrasonic cleaning machine with deionized water and ethanol for 10 minutes, and then dry it with nitrogen;

[0021] 2)p-Cu 2 O nanorod array preparation: configure 5M NaOH solution, pour the NaOH solution into the electrolytic cell, use the copper sheet substrate as the working electrode, Ag / AgCl as the reference electrode, and platinum wire as the counter electrode to form a standard three-electrode system ; At room temperature, a 30mA constant current is applied to the working electrode to obtain Cu(OH) 2 Nanorod array precursor; the Cu(OH) 2 The nanorod array precursor is placed in an inert protective gas, and the temperature is slowly raised to 500°C at 3°C / min for annealing treatment to obtain p-Cu 2 O nanorod arrays.

[0022] 3) n-Cu 2 Preparation of O coating layer: prepare 0.02M Cu(CH 3 COO) 2 solution, 0.08M CH 3 COOH solution and 5mM KCl solution were m...

Embodiment 2

[0024] 1) Substrate pretreatment: Cut the copper sheet into 1cm×2cm size, strip the surface, place it in an ultrasonic cleaning machine with deionized water and ethanol for 10 minutes, and then dry it with nitrogen;

[0025] 2)p-Cu 2 Fabrication of O nanorod arrays: Preparation of Cu(OH) by wet chemistry 2 Precursor, prepare 4ml of 8M NaOH solution and 2ml of 1M (NH 4 )S 2 o 8 solution, after stirring and mixing evenly, place the above-mentioned copper sheet at the bottom of the beaker, and react at room temperature; react for 4 minutes, immediately take out the copper sheet and rinse it repeatedly with deionized water, and air-dry it at room temperature to obtain Cu(OH) 2 Precursor; the Cu(OH) 2 The precursor is placed in a vacuum tube furnace for annealing, and argon is introduced, and the temperature is raised to 500°C at a rate of 5°C / min, and then cooled with the furnace to obtain p-type Cu 2 O nanorods.

[0026] 3) n-Cu 2 Preparation of O coating layer: prepare 0....

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Abstract

The invention discloses a preparation method of a p-Cu2O / n-Cu2O nanometer homojunction material of a core-shell structure. A substrate of the Cu2O nanometer homojunction material is provided with inner-layer p-Cu2O nanorods and outer-layer n-Cu2O wrapping layers in sequence from bottom to top. The preparation method comprises the steps that (1), a Cu(OH)2 precursor is grown on a copper substrate through an electrochemical deposition method, and a p-CU2O nanorod array is obtained through annealing; and (2), the p-Cu2O is wrapped with a layer of n-Cu2O through the electrochemical deposition method again. According to the method, equipment is simple, operation is easy, the nanometer homojunction is good in crystallization quality, the size is uniform, and distribution is uniform; and wrapping is performed through the electrochemical deposition method, and the nanorod array can be uniformly wrapped with an outer layer directly.

Description

technical field [0001] The present invention relates to Cu 2 The preparation method of O nano-homojunction, especially involving a core-shell structure p-Cu 2 O / n-Cu 2 O nanometer homojunction material and preparation method thereof. Background technique [0002] Cu 2 O is a typical semiconductor optoelectronic material, especially an ideal material as a photocathode in photoelectrochemical water splitting technology. Cu 2 The nanostructures of O are diverse and easy to control and prepare, such as nanorods and nanotubes. Since French physicist Edmond Becquerel discovered that certain photosensitive chemical reactions can generate current, scientific researchers have been keen to convert the energy of photons into electrical or chemical energy, so photocatalytic water splitting to produce hydrogen has also attracted much attention. However, the homojunction based on nanomaterials is difficult to prepare, and there is a problem of cumbersome preparation of array electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/04B82Y40/00B82Y30/00C25B1/04C25B11/06B01J23/72
CPCC25B1/04C25D9/04B82Y30/00B82Y40/00B01J23/72C25B1/55C25B11/077B01J35/33B01J35/40B01J35/39Y02E60/36
Inventor 朱丽萍王怡尘
Owner ZHEJIANG UNIV
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