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Preparation method of gamma-Fe2O3/SiO2 nano composite material

A nanocomposite material, --fe2o3 technology, applied in the direction of magnetic materials, inorganic materials, iron oxide/iron hydroxide, etc., to achieve the effect of strong magnetic reaction

Inactive Publication Date: 2019-03-15
嘉兴实新企业服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no preparation of γ-Fe with a spherical shell structure 2 o 3 / SiO 2 Reports on nanocomposites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] γ-Fe 2 o 3 / SiO 2 The preparation method of the nanocomposite specifically includes the following three steps.

[0035] In the first step, γ-Fe was synthesized by high temperature liquid phase method 2 o 3 Nanoparticles;

[0036] A mixture of 1.44mL octadecenoic acid (pure solution) and 10mL octyl ether (pure solution) was heated at 100°C for 30min under argon protection; then 0.2mL Fe(CO) 5 Octyl ether solution (wherein Fe(CO) 5 Concentration of 0.34g / ml) was quickly added to the above mixture, reacted at 295°C for 60min; finally cooled to 200°C, passed air into the system for 2h, cooled to room temperature, washed three times with ethanol and cyclohexane respectively, and then The synthesized γ-Fe 2 o 3 Nanoparticles were dispersed into 5mL of cyclohexane, ready to use.

[0037] In the second step, the γ-Fe 2 o 3 Nanoparticles transfer from the oil phase to the water phase while making γ-Fe 2 o 3 Nanoparticles assemble into clusters with a relatively unif...

Embodiment 2

[0043] A mixture of 1 mL of octadecenoic acid (pure solution) and 10 mL of octyl ether (pure solution) was heated at 100°C for 30 min under the protection of argon; then 0.5 mL of Fe(CO) 5 Octyl ether solution (wherein Fe(CO) 5 Concentration of 0.34g / ml) was quickly added to the above mixture, reacted at 290°C for 70min; finally cooled to 200°C, passed air into the system for 2h, cooled to room temperature, washed three times with ethanol and cyclohexane respectively, and then The synthesized γ-Fe 2 o 3 Nanoparticles were dispersed into 5mL of cyclohexane, ready to use.

[0044] 78mg sodium lauryl sulfate, 10mL deionized water, 280μL dispersed with γ-Fe 2 o 3 Nanoparticles of cyclohexane, mixed with 620 μL cyclohexane, ultrasonically assisted for 8 minutes, then kept at 70°C for 4 hours, and finally cleaned by centrifugation. The cleaning solvent was deionized water. After three times of cleaning, γ-Fe 2 o 3 clusters and disperse them in 1 mL of deionized water for later...

Embodiment 3

[0047] A mixture of 1 mL of octadecenoic acid (pure solution) and 12 mL of octyl ether (pure solution) was heated at 100°C for 30 min under the protection of argon; then 0.1 mL of Fe(CO) 5 Octyl ether solution (wherein Fe(CO) 5 Concentration of 0.34g / ml) was quickly added to the above mixture, reacted at 295°C for 60min; finally cooled to 200°C, passed air into the system for 2h, cooled to room temperature, washed three times with ethanol and cyclohexane respectively, and then The synthesized γ-Fe 2 o 3 Nanoparticles were dispersed into 5mL of cyclohexane, ready to use.

[0048] Disperse 50mg sodium lauryl sulfate, 10mL deionized water, 350μL with γ-Fe 2 o 3 Nanoparticles of cyclohexane, mixed with 600 μL cyclohexane, ultrasonically assisted for 8 minutes, then kept at 70°C for 4 hours, and finally cleaned by centrifugation. The cleaning solvent was deionized water. After three times of cleaning, γ-Fe 2 o 3 clusters and disperse them in 1 mL of deionized water for later ...

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Abstract

The invention discloses a preparation method of a gamma-Fe2O3 / SiO2 nano composite material. The preparation method of the gamma-Fe2O3 / SiO2 nano composite material comprises the following steps: heating mixed liquor of octadecenoic acid and caprylyl ether, then adding a Fe(CO)5 caprylyl ether solution, carrying out heating reaction to obtain gamma-Fe2O3 nano-particles, and dispersing the gamma-Fe2O3 nano-particles in cyclohexane, wherein the volume ratio of the octadecenoic acid to the caprylyl ether is 1: 6-12, and the molar ratio of Fe(CO)5 to the octadecenoic acid is 0.03-0.27: 1; mixing thegamma-Fe2O3 nano-particles dispersed in the cyclohexane with a sodium dodecyl sulfate aqueous solution and the cyclohexane, carrying out ultrasonic treatment, assembling into gamma-Fe2O3 clusters, and then dispersing the gamma-Fe2O3 clusters in a water phase; dispersing the gamma-Fe2O3 clusters which is dispersed in the water phase into mixed liquor of deionized water, ammonia water and anhydrousethanol, and adding tetraethylortho silicate to obtain the gamma-Fe2O3 / SiO2 nano composite material, wherein the molar ratio of the tetraethylortho silicate to Fe(CO)5 is 3-10:1. The prepared gamma-Fe2O3 / SiO2 nano composite material has high magnetic response and rapid solid-liquid separating effect, and a magnetic separating material can be provided for the fields of water treatment, catalytic oxidation and the like.

Description

technical field [0001] The invention belongs to the field of metal oxide composite materials, in particular to a gamma-Fe 2 o 3 / SiO 2 Preparation methods of nanocomposites. Background technique [0002] In the past few decades, micro-nano structures with nanometer size, such as nanotubes, nanofibers, nanorods, dendritic structures, hollow sphere structures, core-shell structures, flower structures, bridge structures, tower structures, etc. The special physical and chemical properties produced by the structural effect and nano-size effect have attracted extensive attention from researchers at home and abroad, and it is also a hot spot and focus in the field of preparation of inorganic micro-nano materials. Relevant reports at home and abroad pointed out that ZnO, MgO, TiO have been successfully prepared 2 , CuO, Fe 2 o 3 and Fe 3 o 4 Some important and common metal oxide micro-nano structures were characterized, and their corresponding physical and chemical propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06C01B33/12H01F1/00H01F1/11
CPCC01G49/06C01B33/12C01P2004/62C01P2004/86H01F1/0054H01F1/11
Inventor 吴强德
Owner 嘉兴实新企业服务有限公司
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