Preparation of Nanometer Silica by Freeze-Drying Chemical Precipitation Method

Authors

  • Shanshan Jin School of Chemical and Energy Engineering, Zhengzhou University
  • Xuehui Rui Zhengzhou University
  • Yingping Qi Zhengzhou University
  • Hua Li Zhengzhou University

Keywords:

nanoscale, reverse titration

Abstract

Nanometer SiO2 with different sizes and shapes is synthesized by coprecipitation technique using sodium silicane as Si source, ammonium chloride as precipitant, ethanol as dispersant, CTAB as regulator. Nanometer SiO2 is obtained from the titration precipitation method and reverse titration precipitation method, respectively.Morphology size distribution and structure of SiO2 particles is characterized by laser particle size analyzer ,microscope and FTIR.The results show that the optimum condition of synthesizing nanometer SiO2 were as follows, the concentration of sodium silicane was 0.4 mol/L, volume ratio of ethanol to water was1:8,pH value was 8.5, concentration of CTAB was 6mmol/l.Spherical silica particles ranging from 3 to 6nm are prepared by the method of reverse titration precipitation and freeze-drying.

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Author Biographies

Xuehui Rui, Zhengzhou University

School of Chemical Engineering & Energy, Zhengzhou University, Zhengzhou China 450001; 2 Zhengzhou museum, Zhengzhou China 450000.

Yingping Qi, Zhengzhou University

School of Chemical Engineering & Energy, Zhengzhou University, Zhengzhou China 450001; 2 Zhengzhou museum, Zhengzhou China 450000.

Hua Li, Zhengzhou University

School of Chemical Engineering & Energy, Zhengzhou University, Zhengzhou China 450001; 2 Zhengzhou museum, Zhengzhou China 450000.

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Published

2018-04-30

How to Cite

Jin, S., Rui, X., Qi, Y., & Li, H. (2018). Preparation of Nanometer Silica by Freeze-Drying Chemical Precipitation Method. To Chemistry Journal, 1(1), 57-67. Retrieved from https://purkh.com/index.php/tochem/article/view/63

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Section

Research Articles