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A method for growing α-fe2o3 nanometer arrays in situ on steel surface

An in-situ growth, nano-array technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of poor binding force, complex operation process, single morphology, etc., and achieve easy recycling. , The process is simple, the effect of various shapes

Active Publication Date: 2016-03-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of preparing α-Fe on the iron sheet 2 o 3 The problem of poor binding force, single shape and complex operation process of nano-arrays provides a method for in-situ growth of α-Fe on the surface of steel. 2 o 3 nanoarray approach

Method used

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  • A method for growing α-fe2o3 nanometer arrays in situ on steel surface
  • A method for growing α-fe2o3 nanometer arrays in situ on steel surface
  • A method for growing α-fe2o3 nanometer arrays in situ on steel surface

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specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode is an in-situ growth of α-Fe on the surface of steel 2 o 3 The method of the nanometer array is specifically completed according to the following steps:

[0022] 1. Pretreatment: First, polish the rectangular iron sheet, then use absolute ethanol as the cleaning agent to perform ultrasonic cleaning for 10s to 60s, then rinse with deionized water, and get the processed rectangular iron sheet after natural drying;

[0023] 2. Hydrothermal synthesis reaction: immerse the treated rectangular iron sheet in a reaction kettle filled with alkaline solution, then seal it, and then transfer it to a blast drying oven, and perform a hydrothermal synthesis reaction at a temperature of 120-180°C for 6h-24h , take out the post-reaction iron sheet;

[0024] 3. Low-temperature heat treatment: Clean the reacted iron sheet with anhydrous ethanol or deionized water as a cleaning agent, dry it and put it in a muffle furnace, and rai...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polishing treatment in Step 1 is sandpaper grinding, hydrochloric acid system polishing, hydrogen peroxide system chemical polishing, nitric acid system chemical polishing or electrochemical polishing. Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the specific operation of described sandpaper grinding is as follows: use 800# sandpaper, 1500# sandpaper and 2000# sandpaper to carry out step-by-step polishing on the rectangular iron sheet, which is completed Sandpaper polished finish. Others are the same as in the second embodiment.

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Abstract

The invention relates to a method for conducting in-situ growth of alpha-Fe2O3 nano arrays, in particular to a method for conducting the in-situ growth of the alpha-Fe2O3 nano arrays on the surface of steel. The method aims at solving the problems that when the alpha-Fe2O3 nano arrays are prepared on iron sheets at present, the bonding force is poor, the shape and the appearance are single, and operation procedures are complex. The method includes the steps that (1) polishing processing, washing and airing are sequentially carried out on the rectangular iron sheets, and the processed rectangular iron sheets are obtained; (2) hydro-thermal synthesis reaction is carried out to obtain the iron sheets after reaction; (3) low-temperature heat processing is carried out to obtain the iron sheets with the in-situ growth alpha-Fe2O3 nano arrays on the surfaces. The method has the advantages that the shortcoming that a traditional powder synthesis method is difficult to load and poor in bonding force is overcome, and the iron sheets and alkaline solutions can be basically recycled; a target product obtained with the method is even in distribution, the grain size is adjustable, and large-scale automation continuous production can be achieved. The method is mainly used for conducting the in-situ growth of the alpha-Fe2O3 nano arrays on the surfaces of the iron sheets.

Description

technical field [0001] The invention relates to an in-situ growth α-Fe 2 o 3 nanoarray approach. Background technique [0002] In recent years, Fe 2 o 3 Due to its low price and wide range of sources, nanomaterials have been more and more widely used in gas sensors, organic degradation, magnetic materials, and coatings. In addition, because its energy band gap is 2.2eV, it has the characteristics of n-type semiconductor, and it can also be applied in the field of photocatalytic hydrogen production. [0003] Supported α-Fe is required for both catalysis and photo-splitting of water 2 o 3 Nanoarrays as electrodes and mediators. Supported α-Fe 2 o 3 The preparation of nano-arrays mainly adopts methods such as thermal oxidation, anodic oxidation, chemical vapor deposition, and atomic layer deposition. Generally, FTO and ITO conductive glass are used as carriers to make α-Fe 2 o 3 Nanoarrays are attached to its surface. For example, XuRui et al. prepared flake α-Fe on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/62B82Y40/00B82Y30/00
Inventor 姜兆华蓝卫王志江王建康
Owner HARBIN INST OF TECH
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