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Hydrothermal method-based method for preparing alpha-Fe2O3 nanotube array

A technology of nanotube arrays and nanorod arrays, which is applied in the field of Fe2O3 nanotube arrays based on the hydrothermal method, can solve the problems of difficult assembly into ordered arrays, unfavorable large-scale production, complex and expensive use, etc., and achieve low equipment requirements , Low production cost and short production cycle

Inactive Publication Date: 2016-01-20
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] In the prior art, the preparation of α-Fe 2 o 3 The methods of nanotube arrays mainly include anodic oxidation method and template method, but these two methods not only have low preparation efficiency, but also need to use complex and expensive production equipment, high production cost, and difficult to operate, so they are not conducive to large-scale production; α-Fe can be synthesized by hydrothermal method 2 o 3 Nanotubes, but their products are in a powder state, which is difficult to assemble into ordered arrays

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  • Hydrothermal method-based method for preparing alpha-Fe2O3 nanotube array

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[0034] The preparation α-Fe provided by the present invention 2 o 3 The nanotube array approach has at least the following advantages:

[0035] (1) the α-Fe that the embodiment of the present invention makes 2 o 3 Nanotube arrays are an ordered α-Fe 2 o 3 nanotube array films, these α-Fe 2 o 3 The nanotube arrays are uniformly distributed on the FTO substrate, and the α-Fe 2 o 3 The nanotube array film not only has a high density of oxygen vacancies, but also has a large specific surface area, a high carrier concentration, and a high photocatalytic activity. Therefore, the α-Fe prepared in the embodiment of the present invention 2 o 3 Nanotube arrays are well suited for use as photoelectrodes.

[0036] (2) The embodiment of the present invention is based on FeCl 3 、NaNO 3 , deionized water, nitrogen, and glass substrates covered with FTO as raw materials, these raw materials are not expensive raw materials, and in the preparation process, there is no need for compl...

Embodiment 1

[0042] A preparation of α-Fe based on hydrothermal method 2 o 3 A method for nanotube arrays, comprising the steps of:

[0043] Step 1, FTO pretreatment: Sonicate commercial FTO with a size of 30mmX14mm in acetone, absolute ethanol, and deionized water for 30 minutes each, then wash with deionized water, and then dry the clean FTO in air.

[0044] Step 2, preparation of FeCl 3 and NaNO 3 The mixed solution: deionized water, FeCl 3 ·6H 2 O and NaNO 3 Mix according to the weight ratio of 1000:27:42.5 to obtain FeCl 3 and NaNO 3 mixed solution.

[0045] Step 3, preparation of β-FeOOH nanorod array: FeCl 3 and NaNO 3 20ml of the mixed solution was injected into a polytetrafluoroethylene liner with a volume of 50ml, and the glass substrate covered with FTO was placed obliquely on FeCl 3 and NaNO 3 In the mixed solution, the side of the glass substrate covered with FTO faces the inner wall of the polytetrafluoroethylene liner; then, the polytetrafluoroethylene liner is p...

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Abstract

The invention discloses a hydrothermal method-based method for preparing a alpha-Fe2O3 nanotube array. The method comprises the following steps: preparing a beta-FeOOH nanorod array, namely obliquely placing a glass substrate coated with fluorine-doped stannic oxide (FTO) in a mixed liquid of FeCl3 and NaNO3, and performing hydrothermal reaction at 100 DEG C for 12h so as to obtain a beta-FeOOH nanorod array which grows on the glass substrate; and preparing the alpha-Fe2O3 nanotube array, namely annealing the beta-FeOOH nanorod array in nitrogen gas for 6h so as to obtain the alpha-Fe2O3 nanotube array. The method is high in preparation efficiency, short in production period, low in production cost, low in device requirments, and easy to operate, has effects of environment friendliness and no pollution and is suitable for mass production.

Description

technical field [0001] The present invention relates to α-Fe 2 o 3 The technical field of preparation of nanotube arrays, especially related to a preparation based on hydrothermal method-Fe 2 o 3 Methods for nanotube arrays. Background technique [0002] Nanostructured α-Fe 2 o 3 It is a kind of photocatalyst, under the action of light and external bias voltage, it can realize the catalytic decomposition of water to obtain hydrogen and oxygen; under the situation of increasingly serious environmental pollution, obtaining clean hydrogen energy is of great significance to environmental protection. with TiO 2 Compared with photocatalytic materials that can only absorb ultraviolet light, nanostructured α-Fe 2 o 3 The band gap is narrow and the absorption efficiency of sunlight is high. The carrier concentration and specific surface area are the factors that affect the nanostructured α-Fe 2 o 3 An important factor for catalytic efficiency, α-Fe 2 o 3 The larger the s...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J35/10B01J37/10
Inventor 缪春辉汤泉张涛陈国宏王若民王勇邢明军张洁
Owner STATE GRID CORP OF CHINA
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