Cut-off carbon nanotube and TiO2 nanotube array heterostructure and preparation method and device thereof

A technology of nanotube arrays and carbon nanotubes, applied in capacitors, photosensitive devices, electrical components, etc., can solve problems such as limited development, complex organic synthesis, and high price, and achieve cheap, easy to obtain, and simple production methods.

Pending Publication Date: 2022-05-27
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently existing TiO 2 Nanocrystalline chemical batteries, where the photosensitizer component requires complex organic synthesis and is expensive, limits its development

Method used

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  • Cut-off carbon nanotube and TiO2 nanotube array heterostructure and preparation method and device thereof
  • Cut-off carbon nanotube and TiO2 nanotube array heterostructure and preparation method and device thereof
  • Cut-off carbon nanotube and TiO2 nanotube array heterostructure and preparation method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The titanium metal substrate (pure titanium foil) was polished with sandpaper, cleaned and polished, and stored in deionized water for later use. Platinum foil was used as the counter electrode. The electrolyte solution is 95% diethylene glycol by volume, 2% hydrofluoric acid solution, 3% deionized water. Anodizing at room temperature at 55 V for 1 h to form TiO on metallic titanium substrates 2 nanotube arrays such as Figure 5 As shown, TiO is formed by anodizing on the metal titanium substrate 7 2 Nanotube array 5, while in TiO 2 TiO forms at the bottom of the nanotube array 2 barrier layer 6. with TiO 2 The metallic titanium substrates of nanotube arrays were sequentially rinsed in isopropanol and deionized water to remove electrolytes, and dried in a fume hood, and then the dried samples were annealed at 530 °C for 3 h in an air atmosphere to obtain the crystal structure. figure 1 for pure TiO 2 Field Emission Scanning Electron Microscopy (FESEM) pattern (F...

Embodiment 2

[0036] The titanium metal substrate (pure titanium foil) was polished with sandpaper, cleaned and polished, and stored in deionized water for later use. Platinum foil was used as the counter electrode. The electrolyte solution is 95% diethylene glycol by volume, 2% hydrofluoric acid solution, 3% deionized water. Anodizing at room temperature 55 V for 2 h to form TiO on metallic titanium substrates 2 Nanotube arrays. with TiO 2 The metallic titanium substrates of nanotube arrays were sequentially rinsed in isopropanol and deionized water to remove electrolytes, and dried in a fume hood, and then the dried samples were annealed at 530 °C for 3 h in an air atmosphere to obtain the crystal structure.

[0037] Suspend 100 mg of carbon nanotubes in 30 mL of concentrated H 2 SO 4 , stirred at room temperature for 30 min, and then added 18 mL of concentrated HNO 3 , heated and stirred at 70 ~ 80 ℃ for 10h. The cut carbon nanotubes are collected by centrifugation, repeatedly was...

Embodiment 3

[0040] The titanium metal substrate (pure titanium foil) was polished with sandpaper, cleaned and polished, and stored in deionized water for later use. Platinum foil was used as the counter electrode. The electrolyte solution is 95% diethylene glycol by volume, 2% hydrofluoric acid solution, 3% deionized water. Anodizing at room temperature at 55 V for 4 h to form TiO on metallic titanium substrates 2 Nanotube arrays. with TiO 2 The metal titanium substrate of the nanotube array was sequentially rinsed in isopropanol and deionized water to remove the electrolyte, and dried in a fume hood, and then the dried array was annealed at 530 °C for 3 h in an air atmosphere to obtain the crystal structure.

[0041] Suspend 100 mg of carbon nanotubes in 30 mL of concentrated H 2 SO 4 , stirred at room temperature for 30 min, and then added 18 mL of concentrated HNO 3 , heated and stirred at 70-80°C for 12h. The cut carbon nanotubes are collected by centrifugation, repeatedly wash...

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Abstract

The invention discloses a cut-off carbon nanotube and TiO2 nanotube array heterostructure and a preparation method and device thereof. The preparation method comprises the following steps: controlling reaction conditions to regulate and control the length/diameter size and proportion of a TiO2 nanotube array structure and carbon nanotubes; carbon nano tube and TiO2 nano tube array heterostructures with different packing densities are formed through an electrophoresis method; the obtained series of heterostructures with different structures are prepared into brand-new photovoltaic devices under two conditions of no electrolyte and existence of electrolyte respectively. The average photocurrent density is increased from 16 [mu] A/cm < 2 > of a pure TiO2 nanotube array to 20-23 [mu] A/cm < 2 >; and the efficiency of the device is 0.01%-2%. The device is simple in manufacturing method, low in cost and free of pollution, is a novel structure capable of effectively utilizing sunlight, and widens the application range of TiO2 and carbon nanotubes in the photovoltaic field.

Description

technical field [0001] The invention relates to materials and construction methods of photovoltaic devices, in particular to a cut-off carbon nanotube filled TiO 2 Heterostructures of nanotube arrays and preparation methods thereof, and novel photovoltaic devices and construction methods thereof. Background technique [0002] As a new type of energy, solar energy has been widely concerned by people, TiO 2 As a semiconductor material, it has a suitable band gap, low cost and good chemical stability, and has been widely used in solar cells. TiO grown on titanium substrates 2 The nanotube array is highly oriented, which can provide a good path for electron transfer, and the fabrication method is simple, which avoids the tedious process of organic synthesis, and provides the possibility for large-scale roll-to-roll production. TiO that currently exists 2 Nanocrystalline chemical cells, in which the photosensitizer components require complex organic synthesis and are expensiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
CPCH01G9/2031Y02P70/50
Inventor 唐建国牛思棋王瑶沈文飞杜中林毛遂黄林军刘瑾张淼荣
Owner QINGDAO UNIV
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