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Citation: ZHANG Jun-Jun, ZHONG Ya, SHEN Xiao-Dong, CUI Sheng, KONG Yong, JI Li-Li, LI Bo-Ya. Properties and Characterization of SiO2 Monolithic Aerogels Doped with Yttrium[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(4): 793-799. doi: 10.11862/CJIC.2014.136 shu

Properties and Characterization of SiO2 Monolithic Aerogels Doped with Yttrium

  • 1.

    College of Materials Science and Technology, Nanjing University of Technology, Nanjing 210009, China

  • Corresponding author: SHEN Xiao-Dong, 
  • Received Date: 1 August 2013
    Available Online: 28 October 2013

    Fund Project: 教育部“长江学者和创新团队发展计划”(No.IRT1146)；江苏省高校优势学科建设工程项目(PAPD)资助项目；江苏省博士后科研资助(No.1302053B)。 (No.IRT1146)；江苏省高校优势学科建设工程项目(PAPD)资助项目；江苏省博士后科研资助(No.1302053B)

  • Yttrium doped SiO2 monolithic aerogels were prepared with YCl3·6H2O, TEOS as raw material by sol-gel method and CO2 supercritical drying technique, and the doping concentrations are in the range of 5wt%~30wt% Y2O3. The structures and properties of samples were analyzed by means of SEM (Scanning electron microscope), TEM (Transmission electron microscope), XRD (X-ray diffraction), BET (Brunauer-Emmett-Teller) and XRF (X-ray fluorescence). The results showed that Y2O3-SiO2 aerogels maintained the original space network structures of SiO2 aerogels. Improvements in thermal stability were obtained by incorporation of yttrium species during the aerogels preparation. When treated by the thermal treatment with 900 ℃ for 2 h, the 10wt% (0.447 g of YCl3·6H2O)Y2O3-SiO2 aerogels still showed an amorphous state and gave a larger surface area of 643.79 m2·g-1,and the average pore diameter was about 21.3 nm.
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