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纳米ZrO_2/(1-n)SiO_2-nAl_2O_3介孔复合作的制备与光致发光 被引量:1

Preparation and Photoluminescence of Mesoporous ZrO_2/(1-n)SiO_2-nAl_2O_3 Nanocomposites
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摘要 采用溶胶-凝胶法和超临界干燥技术制备了(1-n)SiO2-nAl2O3(n=0、001、0.1)混合气凝胶体系,并以此作为载体,成功地将纳米ZrO2粒子组装到(1—n)SiO2-nAl2O3介孔体系中,而形成纳米ZrO2/(1—n)SiO2-nAl2O3介孔复合材料.光致发光光谱研究表明,室温下以316um(392eV)波长激发时,纳米ZrO2粒子540um(230eV)荧光峰,在介孔复合体中将蓝移至400um(310eV)左右,蓝移量140um;其光致荧光峰的相对强度亦随Al2O3的掺入量不同而不同.对产生上述光谱性质变化的机理进行了初步探讨. (1--n)SiO2-nAl2O3 (n=0, 0.01, 0.1) aerogels were prepared by using a sol-gel route and followed by the supercritical drying technique. Nano-ZrO2 precipitates were introduced into thepores of the aerogels. Photoluminescence of the ZrO2/ (1--n)SiO2-nAl2O3 nanocomposites wasmeasured. The results show that the luminescence peak at about 540um (2.30eV) for nano-ZrO2bulk sample shifts to 400urn (3.10eV) (blue shift) for ZrO2/(1--n)SiO2-nAl2O3 nanocomposites,when the excitation wavelength is 316um (3.92eV) at room temperature. The blue shift is about140um. The relative intensities of the luminescence peak change with the doping amount of thenano-Al2O3. Mechanism of change of the luminescence peak in the visible region was proposed.
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 1998年第6期859-865,共7页 Journal of Inorganic Materials
基金 国家自然科学基金!1967405 攀登计划资助!920305
关键词 复合体 气凝胶 光致发光 氧化锆 氧化硅 氧化铝 nanocomposite, aerogel, photoluminescence
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  • 1张立德,1991年
  • 2Yin Z,J Non-Cryst Solid,1989年,114卷,489页

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