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A synthetic method of ag@ag2s/tio2 nanorod array

A technology of nanorod array and synthesis method, which is applied in the synthesis field of Ag@Ag2S/TiO2 nanorod array, can solve problems such as environmental pollution and photocorrosion of Cd elements, and achieve the effect of simplifying the implementation process, improving absorption and improving transmission.

Inactive Publication Date: 2018-05-04
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with publication number CN103151175A discloses a CdS quantum dot sensitized TiO 2 Fabrication method of branched nanostructures, which successfully prepared CdS / TiO using continuous chemical water bath deposition 2 The structure of CdS is a narrow bandgap semiconductor, which can improve the absorption of photoanode in the visible light region, but the photocorrosion of Cd element is serious, and it will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Add 0.8mL tetrabutyl titanate to 24mL deionized water, 22mL concentrated hydrochloric acid with a mass fraction of 37% and 2mL acetic acid mixed solution, stir until the solution is clear, and then transfer the solution to the water with FTO conductive glass In a thermal reaction kettle, conduct a hydrothermal reaction at 150°C for 20 hours, cool naturally to room temperature, take out the sample, wash it, dry it and anneal at 450°C for 30 minutes to obtain TiO with a length of 3-4 μm 2 nanorod arrays;

[0016] (2) TiO obtained in step (1) 2 Nanorod arrays immersed in 100mL AgNO 3 and polyvinylpyrrolidone (PVP) ethanol and aqueous solution, where AgNO 3 The molar concentration of PVP is 2mmol / L, the mass concentration of PVP is 1g / L, the volume ratio of water and ethanol is 1:1, irradiated under ultraviolet light for 10min, then the sample is taken out, cleaned and dried naturally to obtain Ag-modified TiO 2 nanorod arrays;

[0017] (3) The Ag-modified TiO obtai...

Embodiment 2

[0019] (1) Add 0.8mL tetrabutyl titanate to 24mL deionized water, 22mL concentrated hydrochloric acid with a mass fraction of 37% and 2mL acetic acid mixed solution, stir until the solution is clear, and then transfer the solution to the water with FTO conductive glass In a thermal reaction kettle, conduct a hydrothermal reaction at 150°C for 20 hours, cool naturally to room temperature, take out the sample, wash it, dry it and anneal at 450°C for 30 minutes to obtain TiO with a length of 3-4 μm 2 nanorod arrays;

[0020] (2) TiO obtained in step (1) 2 Nanorod arrays immersed in 100mL AgNO 3 and PVP in ethanol and aqueous solutions, where AgNO 3 The molar concentration of PVP is 1mmol / L, the mass concentration of PVP is 1g / L, the volume ratio of water and ethanol is 1:1, irradiated under ultraviolet light for 30min, then the sample is taken out, cleaned and dried naturally to obtain Ag-modified TiO 2 nanorod arrays;

[0021] (3) The Ag-modified TiO obtained in step (2) 2 ...

Embodiment 3

[0023] (1) Add 0.8mL tetrabutyl titanate to 24mL deionized water, 22mL concentrated hydrochloric acid with a mass fraction of 37% and 2mL acetic acid mixed solution, stir until the solution is clear, and then transfer the solution to the water with FTO conductive glass In a thermal reaction kettle, conduct a hydrothermal reaction at 150°C for 20 hours, cool naturally to room temperature, take out the sample, wash it, dry it and anneal at 450°C for 30 minutes to obtain TiO with a length of 3-4 μm 2 nanorod arrays;

[0024] (2) TiO obtained in step (1) 2 Nanorod arrays immersed in 100mL AgNO 3 and PVP in ethanol and aqueous solutions, where AgNO 3 The molar concentration of PVP is 0.5mmol / L, the mass concentration of PVP is 1g / L, the volume ratio of water and ethanol is 1:1, irradiated under ultraviolet light for 50min, then the sample is taken out, cleaned and dried naturally to obtain Ag-modified TiO 2 nanorod arrays;

[0025] (3) The Ag-modified TiO obtained in step (2) ...

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Abstract

The invention discloses a method for synthesizing an Ag@Ag2S / TiO2 nanorod array. The specific steps are: (1) preparing a TiO2 nanorod array on an FTO conductive glass, (2) immersing the TiO2 nanorod array in a AgNO3 precursor solution And the Ag-modified TiO2 nanorod array was prepared by ultraviolet light irradiation; (3) The Ag-modified TiO2 nanorod array was immersed in the polysulfide solution dissolved in Na2S and S, and the Ag@Ag2S / TiO2 nanorod array was prepared by reaction. The present invention utilizes the synergistic effect of Ag and Ag2S to improve the material's absorption of visible light, improves the transmission and separation efficiency of photogenerated charges, and obtains a photoanode material with high photolysis water efficiency, and the synthesis method is simple in process and simplifies the construction of the electrode. The implementation process is conducive to mass production.

Description

technical field [0001] The invention belongs to the technical field of synthesis of composite nanomaterials, in particular to an Ag@Ag 2 S / TiO 2 Synthetic methods of nanorod arrays. Background technique [0002] With the rapid development of science and technology and modern industry, the depletion of fossil energy and environmental pollution have increasingly become the main factors affecting the sustainable development of society, so the development and utilization of clean energy is imminent. Solar energy is a huge treasure trove of energy, which is widely used in hot fields such as solar cell power generation, photocatalysis, and photocatalytic water splitting to produce hydrogen. In 1972, Japanese scholars Fujishima and Honda adopted single crystal n-TiO 2 Splitting water as a photoanode uncovers TiO 2 As a prelude to the photoanode for photoelectrochemical splitting of water. [0003] TiO 2 The bandgap of TiO is 3.4eV, which can only absorb 5% of the sun's ultrav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0264H01L31/0296H01L31/032B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01L31/0264H01L31/0296H01L31/03042H01L31/0324
Inventor 徐芳陈会敏梅晶晶蒋凯武大鹏高志永
Owner HENAN NORMAL UNIV
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