Al2O3-2SiO2 Nanoparticles with Defined Al-Si Ratio:Processing Optimization and Conversion

郑广俭; 崔学民; 张伟鹏; 童张法; 李峰

doi:10.1016/S1004-9541(12)60393-0

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Al₂O₃-2SiO₂ Nanoparticles with Defined Al-Si Ratio:Processing Optimization and Conversion

MATERIALS AND PRODUCT ENGINEERING | Updated：2026-01-06

- Al₂O₃-2SiO₂ Nanoparticles with Defined Al-Si Ratio:Processing Optimization and Conversion
- Chinese Journal of Chemical Engineering Vol. 20, Issue 2, Pages: 312-318(2012)
- Affiliations：
  
  1. School of Chemistry and Chemical Engineering, Guangxi University,Nanning,China,530004
  2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology,Beijing,China,100029
  3. College of Chemistry and Life Science, Guangxi Teachers Education University,Nanning,China,530001
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(12)60393-0
  CLC：
- Published：2012
- Accepted：
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DOI：

O DOI： 10.1016/S1004-9541(12)60393-0.

摘要

Abstract

Attempts had been made to synthesize Al

-2SiO

nanopowders by sol-gel method with tetraethoxysilane (TEOS) and aluminum nitrate (ANN) as the starting materials.DTS

TEM

SEM and BET were employed to study the effects of process parameters on the size

specific surface area and structure (morphology) of powders.The alkali-activation reactivity of the powders was tested for manufacturing geopolymers and their hydrothermal reactions were performed for fabricating zeolites.The results show that the optimum process parameters and drying method for preparing Al

-2SiO

nanopowders are as follows:the molar ratio of water and ethanol to TEOS are 0:1 and 12:1 respectively at synthetic temperature of 50 ℃ and the drying method is azeotropic distillation with microwave drying.The average particle diameters of the powders were about 70 nm and the largest BET specific surface area was up to 669 m

·g

-1

.The compressive strength of the geopolymer and the calcium exchange capacity (by CaCO

) of NaA zeolite prepared with the powders reached to 29 MPa and 366 mg·g

-1

respectively.

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