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A preparation method of solar full-band photocatalytic nano-array

A nano-array and nano-tube array technology, applied in the field of photocatalysis, to overcome difficulties in recycling, improve photocatalytic efficiency, and inhibit rapid recombination

Active Publication Date: 2020-11-10
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the solar spectrum, near-infrared light accounts for about 44% of the total solar light intensity, but there has been no suitable photocatalyst to effectively utilize the near-infrared light band, so that it cannot maximize the use of light from ultraviolet light to near-infrared light. Photocatalysis in the full band of sunlight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] (1), TiO 2 Fabrication of nanotube arrays

[0018] The titanium sheet will first be polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone and distilled water, and then the titanium sheet will be used as the anode, graphite will be used as the counter electrode, and 1% NH 4 The mixture of ethylene glycol and water in F is the electrolyte. After oxidation at 50 V for 1 h, it is washed with ethanol and distilled water in turn, dried at 80 °C, and then calcined at 400 °C in air for 2 h. After cooling, it is obtained TiO with a pore size of about 100 nm and regular morphology 2 nanotube arrays;

[0019] (2), VS 4 Sol preparation

[0020] Dissolve a certain amount of ammonium metavanadate in distilled water and ethanol and stir evenly to form solution A; dissolve a certain amount of thioacetamide and triethanolamine in ethylene glycol and stir evenly to form solution B; drop solution A into the solution In B, stir while adding drop...

specific Embodiment approach 1

[0025] (1), TiO 2 Fabrication of nanotube arrays

[0026] The titanium sheet will first be polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone and distilled water, and then the titanium sheet will be used as the anode, graphite will be used as the counter electrode, and 1% NH 4 The mixture of ethylene glycol and water in F is the electrolyte. After oxidation at 50 V for 1 h, it is washed with ethanol and distilled water in turn, dried at 80 °C, and then calcined at 400 °C in air for 2 h. After cooling, it is obtained TiO with a pore size of about 100 nm and regular morphology 2 nanotube arrays;

[0027] (2), VS 4 Sol preparation

[0028] Dissolve 1.17 g of ammonium metavanadate in 20 ml of distilled water and 20 ml of ethanol and stir to form solution A; dissolve 3.75 g of thioacetamide and 3.725 g of triethanolamine in 50 ml of ethylene glycol and stir to form solution B; Add solution A dropwise into solution B, and stir while ad...

specific Embodiment approach 2

[0033] (1), TiO 2 Fabrication of nanotube arrays

[0034] The titanium sheet will first be polished with metallographic sandpaper, and then ultrasonically cleaned with ethanol, acetone and distilled water, and then the titanium sheet will be used as the anode, graphite will be used as the counter electrode, and 1% NH 4 The mixture of ethylene glycol and water in F is the electrolyte. After oxidation at 50 V for 1 h, it is washed with ethanol and distilled water in turn, dried at 80 °C, and then calcined at 400 °C in air for 2 h. After cooling, it is obtained TiO with a pore size of about 100 nm and regular morphology 2 nanotube arrays;

[0035](2), VS 4 Sol preparation

[0036] Dissolve 1.17 g of ammonium metavanadate in 30 ml of distilled water and 10 ml of ethanol and stir to form solution A; dissolve 3.75 g of thioacetamide and 3.725 g of triethanolamine in 50 ml of ethylene glycol and stir to form solution B; Add solution A dropwise to solution B, and stir while addin...

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Abstract

The invention relates to a solar light full-band photocatalytic nanoarray and a preparation method thereof. The photocatalytic nanoarray is a nanoVS 4 Filled with TiO 2 Nanotube array. The photocatalytic nanoarray produced by the method of the present invention is firmly attached to the titanium substrate, can be easily recovered and recycled, and overcomes the problem of difficulty in recycling traditional powder photocatalysts; the photocatalytic nanoarray is a nanoVS 4 Filled with TiO 2 The nanotube array structure can inhibit the rapid recombination of photogenerated electrons and holes and improve photocatalytic efficiency; at the same time, it synthesizes TiO 2 Has excellent UV photocatalytic effect and VS 4 It has excellent visible and near-infrared photocatalytic effects, allowing the nanoarray to maximize the use of the full range of sunlight from ultraviolet light to near-infrared light for photocatalysis, which is useful for promoting the application of natural sunlight photocatalytic technology, alleviating the energy crisis and strengthening the environment. Governance has important implications.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a method for preparing a solar full-band photocatalytic nano array. Background technique [0002] Energy shortage and environmental pollution are major challenges faced by human beings at present. The use of sunlight to decompose water to produce hydrogen and oxygen, reduce carbon dioxide and degrade organic pollutants is an important research hotspot in the field of photocatalysis. In the process of realizing solar photocatalysis, the construction of efficient photocatalyst system plays a decisive role. Since 1972 Nature published about TiO 2 After decomposing water into hydrogen and oxygen under the irradiation of ultraviolet light, people have studied TiO from various fields. 2 Photocatalysis has conducted in-depth research to explore the principle of the photocatalytic process and strive to improve the photocatalytic efficiency. Studies have shown that TiO 2 It can be used a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J35/02B01J35/00
CPCB01J27/04B01J35/40B01J35/39
Inventor 张洪元徐靖才
Owner CHINA JILIANG UNIV
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