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A kind of preparation method of rice-like α-fe2o3 nano-powder

A nano-powder and rice-like technology, which is applied in the field of preparation of rice-like α-Fe2O3, can solve the problem that the nano-iron oxide particles cannot meet the size controllability and other problems, and achieve the effect of large specific surface area.

Inactive Publication Date: 2015-08-12
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the notification number CN 103754956A provides a hydrothermal synthesis method of nano-iron oxide with controllable morphology in order to solve the problem that the synthesized nano-iron oxide particles cannot meet the size controllability in the range of 40-600nm

Method used

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  • A kind of preparation method of rice-like α-fe2o3 nano-powder
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  • A kind of preparation method of rice-like α-fe2o3 nano-powder

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Embodiment 1

[0027] According to the needs of preparing 1mmol of FeOOH, weigh 0.36g (9mmol) NaOH and 0.40g (1mmol) FeOOH respectively 2 (SO 4 ) 3 , were dissolved in 9ml of deionized water. Fe was then mixed with 2 (SO 4 ) 3 The solution was added dropwise to the NaOH solution, and after the precipitation reaction was completed, 0.2 g of C 19 h 42 BrN acts as a surfactant. The mixed solution was transferred into a 25ml polytetrafluoroethylene reactor, and subjected to hydrothermal reaction at 220° C. for 2 hours, and the obtained product was needle-shaped FeOOH powder. The obtained FeOOH was raised from room temperature to 1000°C at a heating rate of 10°C / min in a muffle furnace and then directly cooled to obtain rice-shaped α-Fe 2 o 3 Nano powder. Its XRD spectrum is as figure 1 As shown, its scanning electron microscope picture is shown in figure 2 shown.

Embodiment 2

[0029] According to the needs of preparing 1mmol of FeOOH, weigh 0.36g (9mmol) NaOH and 0.40g (1mmol) FeOOH respectively 2 (SO 4 ) 3 , were dissolved in 9ml of deionized water. Then, while stirring, the Fe 2 (SO 4 ) 3 The solution was added dropwise to the NaOH solution, and after the precipitation reaction was completed, 0.3 g of C 19 h 42 BrN acts as a surfactant. The mixed solution was transferred into a polytetrafluoroethylene reactor, and hydrothermally reacted at 220° C. for 2 hours, and the obtained product was needle-shaped FeOOH powder. The obtained FeOOH was raised from room temperature to 1000°C at a heating rate of 10°C / min in a muffle furnace and then directly cooled to obtain rice-shaped α-Fe 2 o 3 Nano powder. Its XRD spectrum is as image 3 As shown, its scanning electron microscope picture is shown in Figure 4 shown.

Embodiment 3

[0031] According to the needs of preparing 1mmol of FeOOH, weigh 0.36g (9mmol) NaOH and 0.40g (1mmol) FeOOH respectively 2 (SO 4 ) 3 , were dissolved in 9ml of deionized water. Fe was then mixed with 2 (SO 4 ) 3 The solution was added dropwise to the NaOH solution, and after the precipitation reaction was completed, 0.3 g of C 19 h 42 BrN acts as a surfactant. The mixed solution was transferred into a polytetrafluoroethylene reactor, and hydrothermally reacted at 200° C. for 2 hours, and the obtained product was needle-shaped FeOOH powder. The obtained FeOOH was raised from room temperature to 1000°C at a heating rate of 10°C / min in a muffle furnace and then directly cooled to obtain rice-shaped α-Fe 2 o 3 Nano powder. Its XRD spectrum is as Figure 5 As shown, its scanning electron microscope picture is shown in Figure 6 shown.

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Abstract

The invention discloses a preparation method for rice grain-shaped alpha-Fe2O3 (alpha-ferric oxide) nanometer powder, and belongs to the technical field of the preparation of nanometer materials. The method comprises the following steps: firstly, Fe2(SO4)3 (ferric sulfate) and NaOH (sodium hydroxide) are used as raw materials, hexadecyl trimethyl ammonium bromide (C19H42BrN) is used as a surface active agent, a hydrothermal method is used for preparing needle-shaped FeOOH powder, then after the temperature of the FeOOH powder rises from a room temperature to 1000 DEG C at the temperature rising rate of 10 DEG C / min in a muffle furnace, the FeOOH powder is directly cooled, and the rice grain-shaped alpha-Fe2O3 nanometer powder is obtained. The alpha-Fe2O3 which is prepared according to the method presents a more uniform rice grain shape, the specific surface area is large, and the method can have potential application in the field of photocatalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a rice grain-shaped α-Fe 2 o 3 method of preparation. Background technique [0002] The molecular formula of iron oxide is Fe 2 o 3 , according to their structure can be divided into α-Fe 2 o 3 and γ-Fe 2 o 3 and many other forms. Iron oxide is cheap and rich in raw materials. It is widely used in building materials, coatings and other fields, and plays an important role. Nano-iron oxide materials also have many potential physical and chemical properties, so they are generally valued by people. [0003] The common preparation methods of nano-iron oxide powder mainly include dry method and wet method. Among them, the dry method is mainly based on thermal decomposition and physical pulverization, and the wet method is mainly based on sol-gel method, hydrothermal method, hydrolysis method, etc. [0004] At present, some methods for preparing n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06B82Y30/00
Inventor 夏爱林胡绪照晋传贵吴胜华刘先国
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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