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- Title
Resource utilization of chlorosilane residual liquid to prepare nano-silica in reverse microemulsion system.
- Authors
Cai, Jixiang; Huang, Bing; Zhang, Jianghong; Hu, Xin; Li, Youwen; Xue, Jiangpeng
- Abstract
Nano-silica particles were prepared using chlorosilane residual liquid as raw materials in an inverse microemulsion system formed by three different surfactants (TX-100, CTAB, SDS) with n-hexanol, cyclohexane, and ammonia. The phase behavior of inverse microemulsions and the preparation of nano-silica were investigated. The results showed that the system composed of non-ionic surfactant TX-100 had a larger inverse microemulsion region than other two system and was more suitable for the preparation of nano-silica. The prepared nano-silica had uniform sphericity and good dispersibility, the average particle diameter of 31 nm, and the variance of 1 nm. XRD, FT-IR, N2 adsorption/desorption experiments and TG-DSC analysis were used to characterize the prepared nano-silica. The results showed that the prepared nano-silica was amorphous mesoporous silica with a BET specific surface area of 472.5 m2/g. They have a good thermal stability, and the phase structure and main chemical functional groups of nano-silica would not change after calcination at 600 °C, but the nano-silica would undergo a phase change at 1135 °C, which changed from amorphous to crystalline. The new technology not only broadened the source of preparation of nano-silica materials, but also provided new ideas for the treatment of chlorosilane residual liquid and the sustainable development of polysilicon industry.
- Subjects
MICROEMULSIONS; NONIONIC surfactants; CHEMICAL structure; MESOPOROUS silica; RAW materials; SILICA; SILANE
- Publication
Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 14, p11317
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-020-03680-5