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.
- sol-gel;CO₂ supercritical fluid drying;Y₂O₃-SiO₂ aerogels;thermal treatment
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Properties and Characterization of SiO2 Monolithic Aerogels Doped with Yttrium

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通讯作者: 陈斌, bchen63@163.com

Properties and Characterization of SiO₂ Monolithic Aerogels Doped with Yttrium