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核壳结构γ-Fe2O3/SiO2纳米复合材料的合成与分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2013年04期
Page:
115-120
Column:
研究论文
publishdate:
2013-07-15

Article Info:/Info

Title:
Synthesis and study of core-shell γ-Fe2O3/SiO2 nano composite particles
Article ID:
1000-2006(2013)04-0115-06
Author(s):
CHEN LeiJING Yi*
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,Nanjing Forestry University, Nanjing 210037, China
Keywords:
core-shell structural γ-Fe2O3/SiO2 TEOS nano composite particle
Classification number :
TQ174
DOI:
10.3969/j.issn.1000-2006.2013.04.022
Document Code:
A
Abstract:
Core-shell structural γ-Fe2O3/SiO2 nano composite particles were prepared via hydrolysis and condensation by sol-gel method using TEOS as silica precursor. Orthogonal design and single factor experiment were utilized to study effect of seven factors on the synthesis of nano composite particles, such as the dosage of γ-Fe2O3, Ammonia water, TEOS, the ratio of alcohol to water, reaction time, reaction temperature and stirring speed. The synthesized products were characterized by transmission electron microscope(TEM), X-ray diffraction(XRD), infrared spectrometer(FTIR), differential scanning calorimetry(DSC)and particle size analyzer. The results showed that the dosage of TEOS had the most influence on the synthesis of core-shell structural γ-Fe2O3/SiO2 nanocomposite particles. The optimum conditions were as follows:γ-Fe2O3 0.06 g, TEOS 0.5 mL, ammonia 2 mL, the ratio of alcohol to water 5:1, reaction time 8 h, reaction temperature 30 ℃ and stirring speed 150 r/min. Compared core-shell structural γ-Fe2O3/SiO2 with γ-Fe2O3, the average particle size was reduced by 34.1% and particle size distribution was more uniform, with good dispersion.

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Last Update: 2013-07-30