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氧化钇掺杂块状SiO2气凝胶的制备与表征

张君君 ,  仲亚 ,  沈晓冬 ,  崔升 ,  孔勇 ,  冀黎莉 ,  李博雅

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引用本文: 张君君, 仲亚, 沈晓冬, 崔升, 孔勇, 冀黎莉, 李博雅. 氧化钇掺杂块状SiO2气凝胶的制备与表征[J]. 无机化学学报, 2014, 30(4): 793-799. doi: 10.11862/CJIC.2014.136 shu
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

氧化钇掺杂块状SiO2气凝胶的制备与表征

    通讯作者: 沈晓冬 xdshen@njtech.edu.cn
  • 基金项目:

    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)

摘要: 以正硅酸四乙酯(TEOS)为前驱体,YCl3·6H2O为掺杂剂,采用溶胶-凝胶法并结合CO2超临界干燥工艺得到了块状Y2O3-SiO2气凝胶,其中Y2O3掺杂含量控制在5wt%~30wt%范围内。利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、比表面积测定(BET)、X射线荧光分析(XRF)等测试手段对样品进行表征。结果表明：经过氧化钇掺杂后得到的Y2O3-SiO2气凝胶,不仅维持了SiO2气凝胶原有的空间网络结构,而且具有更高的热稳定性,经过900℃热处理2h后,10wt%Y2O3(0.447g的YCl3·6H2O)掺杂的Y2O3-SiO2气凝胶仍然处于无定形态,平均孔径约为21.3nm,比表面积高达643.8m2·g-1。

English

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  • 收稿日期:  2013-08-01
  • 网络出版日期:  2013-10-28
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