Preparation method of alpha-Fe2O3 mesoporous nanorod/nitrogen-doped graphene composite

A nitrogen-doped graphene and composite material technology is applied in the field of preparation of α-Fe2O3/graphene composite materials to achieve the effects of mild reaction conditions, improved efficiency, and improved photocatalytic activity

Inactive Publication Date: 2015-04-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the problem that α-Fe cannot be obtained at present 2 o 3 In situ growth of mesoporous nanorods on nitrogen-doped graphene while ensuring α-F

Method used

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  • Preparation method of alpha-Fe2O3 mesoporous nanorod/nitrogen-doped graphene composite

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specific Embodiment approach 1

[0021] Specific embodiment 1: This embodiment is an α-Fe 2 O 3 The preparation method of mesoporous nanorod / nitrogen-doped graphene composite material is specifically carried out according to the following steps:

[0022] 1. Add the pore former to deionized water, mix and stir for 3-10 minutes to obtain an organic solution; add the aqueous solution of alkali source and inorganic iron to the organic solution in turn and stir for 5-10min to form a uniform transparent mixed solution; The mass ratio of the pore former to the volume of deionized water is 1g: (3.33mL-30mL); the mass ratio of the alkali source to the pore former is 1: (3.33-30); the inorganic iron The concentration of the aqueous solution is 0.05mol / L~0.5mol / L; the volume of the aqueous solution of inorganic iron and the mass ratio of the pore former is 1mL: (0.2g~1.8g);

[0023] 2. Add graphene oxide to the uniform transparent mixture obtained in step 1, ultrasonicate for 0.3h-2h, and then stir for 2h-4h to obtain a stab...

specific Embodiment approach 2

[0032] Specific embodiment two: this embodiment is different from specific embodiment one in that the pore former in step one is glycerol, sucrose, glucose or hydroxycellulose. Others are the same as the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: this embodiment is different from one of specific embodiments one to two in that the alkali source described in step one is urea, ammonia or ammonium acetate. Others are the same as one of specific embodiments one to two.

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Abstract

The invention discloses a preparation method of an alpha-Fe2O3 mesoporous nanorod/nitrogen-doped graphene composite and relates to a preparation method of an alpha-Fe2O3/graphene composite, aiming at solving the problem that the in-situ growth of an alpha-Fe2O3 mesoporous nanorod in nitrogen-doped graphene cannot be achieved and meanwhile the uniformity property of the alpha-Fe2O3 mesoporous nanorod cannot be guaranteed at present. The preparation method comprises the following steps: I. adding an alkali source and an inorganic iron solution to a pore forming agent water solution; II. adding graphene oxide to the mixed liquid of the step I, ultrasonically treating and stirring; and III. pouring a suspension obtained from the step II to a hydrothermal reaction kettle and reacting, cooling, centrifuging, washing and drying. The preparation method has the advantages that the composite functional material disclosed by the invention is high in removal rate on sulfamethoxazole, and the average grain size of the alpha-Fe2O3 mesoporous nanorod is just 4-10nm; and the preparation method is mild in reaction condition, simple in equipment, low in reagent cost, safe and non-toxic and suitable for large-scale production.

Description

Technical field [0001] The present invention relates to an α-Fe 2 O 3 / Graphene composite material preparation method. Background technique [0002] α-Fe 2 O 3 As an n-type semiconductor material with good physical and chemical stability, it has a suitable band gap width (2.0~2.2eV), strong oxidation ability, and high capacitance (~1000mA·h·g -1 ), low price, safety and non-toxic, etc., are widely used in many fields such as photocatalysis and battery electrode materials. As a new type of two-dimensional nanomaterial, graphene has many excellent physical and chemical properties due to its unique monoatomic layer crystal structure (extremely high carrier migration rate of 2×10 5 cm·V -1 ·S -1 , Ultra-high specific surface area of ​​2630m 2 / g, etc.), which has attracted widespread attention in the fields of physics, chemistry, and materials. In recent years, around α-Fe 2 O 3 / Graphene composite functional materials, researchers have carried out a lot of research and successfully ...

Claims

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Application Information

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IPC IPC(8): B01J23/745
Inventor 田家宇邵鹏辉时文歆高珊珊崔福义
Owner HARBIN INST OF TECH
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