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Method for synthesizing Ag@Ag2S/TiO2 nano-rod array

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

Inactive Publication Date: 2017-03-29
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 with 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) 2...

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Abstract

The invention discloses a method for synthesizing an Ag@Ag2S / TiO2 nano-rod array, comprising the following specific steps: (1) preparing a TiO2 nano-rod array on FTO conductive glass; (2) soaking the TiO2 nano-rod array into a precursor solution of AgNO3, and preparing an Ag-modified TiO2 nano-rod array through ultraviolet irradiation; and (3) soaking the Ag-modified TiO2 nano-rod array into a multi-sulfur solution with dissolved Na2S and S, and reacting to prepare an Ag@Ag2S / TiO2 nano-rod array. According to the method disclosed by the invention, the absorption of materials to visible light can be improved by using the synergistic effect of Ag and Ag2S, the transmission and separation efficiency of photogenerated charges can be increased, and photo-anode materials with relatively high photodecomposition water efficiency can be obtained; and in addition, the synthesis method is simple in process, the implementation process of electrodes is simplified, and large-scale production is facilitated.

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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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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