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Three-dimensional TiO2/ZnO heterojunction array synthesis method

A synthesis method, a technology of heterojunction, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the disadvantages of large-scale promotion, complex preparation process, and expensive equipment. and other problems, to achieve the effect of being conducive to large-scale production, simple process, and improving capture capacity

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

Publication No. CN104118899A discloses a ZnO / SnO 2 The preparation method of composite materials, which uses the physical method of supercritical fluid drying, although the electron transition probability and electron mobility are relatively large, the required equipment is expensive and the preparation process is complicated, which is not conducive to large-scale promotion
The patent with publication number CN103803633A discloses a ZnO / TiO 2 Heterojunctions are synthesized by combining chemical and physical methods of co-precipitation and supercritical fluid drying. Although this method overcomes the shortcomings of co-precipitation in the drying process, the process is complicated and the cost is high.

Method used

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  • Three-dimensional TiO2/ZnO heterojunction array synthesis method
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  • Three-dimensional TiO2/ZnO heterojunction array synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Add 0.8mL tetrabutyl titanate to a mixed solution of 24mL deionized water, 22mL concentrated hydrochloric acid (37wt%) and 2mL acetic acid, and stir until the solution is clear to obtain a precursor solution, then transfer the precursor solution to water Put clean FTO conductive glass in the thermal reaction kettle, react with water at 150°C for 20h, cool down to room temperature naturally, take out the sample, clean it and dry it, then place it in a muffle furnace and anneal at 450°C for 30min to increase the crystallinity get one-dimensional TiO 2 nanorod arrays;

[0019] (2) TiO obtained in step (1) 2 Nanorod arrays were soaked in 50mL ethanol solution dissolved with zinc acetate and diethanolamine, wherein the molar concentration of zinc acetate was 0.12mol / L, and the volume fraction of diethanolamine was 1%, soaked at room temperature for 10min, and then the samples were taken out and placed Calcined in a muffle furnace at 400°C for 30 minutes to obtain TiO c...

Embodiment 2

[0023] (1) Add 0.8mL tetrabutyl titanate to a mixed solution of 24mL deionized water, 22mL concentrated hydrochloric acid (37wt%) and 2mL acetic acid, and stir until the solution is clear to obtain a precursor solution, then transfer the precursor solution to water Put clean FTO conductive glass in the thermal reaction kettle, react with water at 150°C for 20h, cool down to room temperature naturally, take out the sample, clean it and dry it, then place it in a muffle furnace and anneal at 450°C for 30min to increase the crystallinity get one-dimensional TiO 2 nanorod arrays;

[0024] (2) TiO obtained in step (1) 2 Nanorod arrays were soaked in 50mL ethanol solution dissolved with zinc acetate and diethanolamine, wherein the molar concentration of zinc acetate was 0.12mol / L, and the volume fraction of diethanolamine was 1%, soaked at room temperature for 30min, and then the samples were taken out and put Calcined in a muffle furnace at 400°C for 30 minutes to obtain TiO cove...

Embodiment 3

[0027] (1) Add 0.8mL tetrabutyl titanate to a mixed solution of 24mL deionized water, 22mL concentrated hydrochloric acid (37wt%) and 2mL acetic acid, and stir until the solution is clear to obtain a precursor solution, then transfer the precursor solution to water Put clean FTO conductive glass in the thermal reaction kettle, react with water at 150°C for 20h, cool down to room temperature naturally, take out the sample, clean it and dry it, then place it in a muffle furnace and anneal at 450°C for 30min to increase the crystallinity get one-dimensional TiO 2 nanorod arrays;

[0028] (2) TiO obtained in step (1) 2Nanorod arrays were soaked in 50mL ethanol solution dissolved with zinc acetate and diethanolamine, wherein the molar concentration of zinc acetate was 0.12mol / L, and the volume fraction of diethanolamine was 1%, soaked at room temperature for 20min, and then the samples were taken out and placed Calcined in a muffle furnace at 400°C for 30 minutes to obtain TiO co...

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Abstract

The invention discloses a three-dimensional TiO2 / ZnO heterojunction array synthesis method, which specifically comprises: (1) preparing a TiO2 nano-rod array on an FTO electric conduction glass; (2) soaking the TiO2 nano-rod array in the ethanol solution of zinc acetate and diethanolamine, taking out, and calcining in a muffle furnace to obtain a ZnO seed crystal-covered TiO2 nano-rod array; and (3) immersing the ZnO seed crystal-covered TiO2 nano-rod array in a hydrothermal reaction kettle filled with a zinc nitrate and hexamethylenetetramine mixing aqueous solution, and preparing the three-dimensional TiO2 / ZnO heterojunction array through a hydrothermal reaction. According to the present invention, the three-dimensional dendritic TiO2 / ZnO heterojunction array is synthesized by using the seed crystal soaking and the two-step hydrothermal method, such that the advantages of simple process, convenient operation, cheap and easily-available raw materials and easy promotion and application are provided.

Description

technical field [0001] The invention belongs to the technical field of synthesis of composite nanomaterials, in particular to a three-dimensional TiO 2 / ZnO heterojunction array synthesis method. Background technique [0002] The development of science and technology has led to the rapid development of modern industry. The depletion of fossil energy and environmental pollution have increasingly become the main factors that coordinate the relationship between humans and the environment and ensure the sustainable development of the economy and society. Therefore, the development and utilization of clean energy is imminent. Solar energy is a huge energy source. Baoku is widely used in hot fields such as solar cell power generation, photocatalysis, and photocatalytic water splitting to produce hydrogen. [0003] TiO 2 Due to its wide source of raw materials, good stability and low price, it is widely used in photocatalysis, photoelectrocatalysis and other fields. However, TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06
CPCB01J23/06B01J37/10B01J35/39
Inventor 徐芳梅晶晶陈会敏武大鹏蒋凯高志永
Owner HENAN NORMAL UNIV
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