Preparation method for Au-Ag co-modified N-doped ZnO nanorods and application of ZnO nanorods to hydrogen production through photo-electrochemical hydrolysis

A nanorod and co-modification technology, which is applied in the preparation of nitrogen-doped ZnO nanorods and the application field of photoelectrochemical hydrolysis hydrogen production, can solve the problems of harmful surfactants and toxic reaction conditions, and achieve effective electron transfer and simple Synthetic method, good contact effect

Inactive Publication Date: 2016-02-24
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of noble metal-modified ZnO nanorod arrays usually requires harsh reaction conditions or involves toxic and harmful surfactants and other substances in the reaction process.

Method used

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  • Preparation method for Au-Ag co-modified N-doped ZnO nanorods and application of ZnO nanorods to hydrogen production through photo-electrochemical hydrolysis
  • Preparation method for Au-Ag co-modified N-doped ZnO nanorods and application of ZnO nanorods to hydrogen production through photo-electrochemical hydrolysis
  • Preparation method for Au-Ag co-modified N-doped ZnO nanorods and application of ZnO nanorods to hydrogen production through photo-electrochemical hydrolysis

Examples

Experimental program
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Embodiment 1

[0055] Polished smooth zinc sheet (1×3cm 2 ) were ultrasonically cleaned in acetone, ethanol, and deionized water for 5 min, and dried in air. Take 1ml of hexamethylenediamine and disperse it in 39ml of deionized water, stir evenly, and transfer it to a 50ml reaction kettle. Dip the cleaned zinc flakes into the above solution, and heat the reactor to 150°C in an oven for 4 hours. The samples were taken out, washed alternately with ethanol and deionized water, placed in a vacuum oven at 60°C, and dried for 5 hours. The vacuum-dried sample was calcined in an ammonia atmosphere, the calcining temperature was 400° C., and the calcining time was 10 min. Next, prepare AgNO with a concentration of 0.01mM 3 Solution, take 50ml and put it in a test tube, put it under the xenon lamp for 6h, take out the sample and wash it alternately with ethanol and deionized water, put it in a vacuum drying oven at 60°C, and dry it for 5h. The final preparation concentration is 0.1mM HAuCl 4 Solu...

Embodiment 2

[0057] Polished smooth zinc sheet (1×3cm 2 ) were ultrasonically cleaned in acetone, ethanol, and deionized water for 5 min, and dried in air. Take 1ml of hexamethylenediamine and disperse it in 39ml of deionized water, stir evenly, and transfer it to a 50ml reaction kettle. Dip the cleaned zinc flakes into the above solution, and heat the reactor to 150°C in an oven for 4 hours. The samples were taken out, washed alternately with ethanol and deionized water, placed in a vacuum oven at 60°C, and dried for 5 hours. The vacuum-dried sample was calcined in an ammonia atmosphere, the calcining temperature was 400° C., and the calcining time was 10 min. Next, prepare AgNO with a concentration of 0.01mM 3 Solution, take 50ml and put it in a test tube, put it under the xenon lamp for 6h, take out the sample and wash it alternately with ethanol and deionized water, put it in a vacuum drying oven at 60°C, and dry it for 5h. The final preparation concentration is 0.1mM HAuCl 4 Solu...

Embodiment 3

[0059] Polished smooth zinc sheet (1×3cm 2 ) were ultrasonically cleaned in acetone, ethanol, and deionized water for 5 min, and dried in air. Take 1ml of hexamethylenediamine and disperse it in 39ml of deionized water, stir evenly, and transfer it to a 50ml reaction kettle. Dip the cleaned zinc flakes into the above solution, and heat the reactor to 150°C in an oven for 4 hours. The samples were taken out, washed alternately with ethanol and deionized water, placed in a vacuum oven at 60°C, and dried for 5 hours. The vacuum-dried sample was calcined in an ammonia atmosphere, the calcining temperature was 400° C., and the calcining time was 10 min. Next, prepare AgNO with a concentration of 0.01mM 3 Solution, take 50ml and put it in a test tube, put it under the xenon lamp for 6h, take out the sample and wash it alternately with ethanol and deionized water, put it in a vacuum drying oven at 60°C, and dry it for 5h. The final preparation concentration is 0.1mM HAuCl 4 Solu...

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Abstract

The invention discloses a preparation method for Au-Ag co-modified N-doped ZnO nanorods, the ZnO nanorods obtained according to the preparation method, and application of the ZnO nanorods. According to a photochemical deposition method, a simple and environment-friendly in-situ synthesis method for the ZnO nanorods is formed and comprises the following two steps: electrons generated on the ZnO nanorods serve as a reducing agent to react with Ag<+> ions in a solution, so that in-situ deposition of Ag nano-particles on the surfaces of the ZnO nanorods is realized; then, the reaction product is directly put in a HAuCl4 solution, and electrons generated on the Ag nano-particles serve as a reducing agent to react with AuCl4<-> ions in the HAuCl4 solution. No any additional reducing reagents and organic modifiers are needed in the two steps, so that the reaction processes are environmentally friendly; a clean contact interface is beneficial to rapid separation and transfer of photo-generated electrons, and improvement in the photo-electrochemical activity of a material.

Description

technical field [0001] The invention belongs to the field of synthesis and manufacture of inorganic semiconductor nanometer materials, and in particular relates to a preparation method of nitrogen-doped ZnO nanorods co-modified by Au and Ag and its application in photoelectrochemical hydrolysis hydrogen production. Background technique [0002] Since 1972, two professors, FujishimaA and HondaK of the University of Tokyo, Japan, first reported the discovery of TiO 2 The phenomenon of hydrogen generation by photocatalytic water splitting at single crystal electrodes has begun, and the technology of photo-splitting water for hydrogen production has attracted extensive attention. As a method of directly using solar energy to produce hydrogen, a clean energy source, the development of photo-splitting water technology is becoming more and more important in the era of resource shortage. More and more semiconductor materials are used as electrode materials for photolysis of water, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B3/04B01J27/24
CPCB01J27/24C01B3/042C01G9/02C01P2004/03C01P2004/04C01P2004/16Y02E60/36Y02P20/133
Inventor 李士阔葛美红
Owner ANHUI UNIVERSITY
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