纳米结构TiO2/SiO2的逐层自组装 |
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引用本文: | 宋秀芹,张雪红,王新,汪兰霞,张萍,魏雨.纳米结构TiO2/SiO2的逐层自组装[J].化学学报,2003,61(5):780-784. |
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作者姓名: | 宋秀芹 张雪红 王新 汪兰霞 张萍 魏雨 |
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作者单位: | 河北师范大学化学学院石家庄050016 |
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基金项目: | 河北省自然科学基金(No.502154)资助项目. |
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摘 要: | 采用逐层自组装方法在二氧化硅球表面交替组装了十二烷基硫酸钠单分子膜和 二氧化钛纳米粒子膜,该复合多层膜经高温假烧后得到了核壳型纳米结构二氧化钛 /二氧化硅复合颗粒.利用XRD,SEM,X射线能谱等对复合颗粒进行了表征.结果 表明:二氧化肽在复合颗粒表面排列紧密、均匀,粒径在50nm左右,为锐钛矿型结 构.复合颗粒中二氧化肽的含量随组装层数的增加而均匀增加.
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关 键 词: | 纳米相材料 二氧化钛 二氧化硅 十二烷基硫酸钠 废水处理 X射线衍射分析 扫描电子显微镜 |
修稿时间: | 2002年6月28日 |
Layer-by-layer Self-assembly of Nanostructural TiO_2/SiO_2 |
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Affiliation: | Department of Chemistry, Hebei Normal University |
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Abstract: | Core-shell type nanostructure T1O2 composite spheres have been fabricated by consecutively assembling of surfactant QraKfesSC^Na (SDS) and titanium dioxide nanoparticles onto SiO2 micro beads and subsequently removing the surfactant by calcinations. A transparent colloidal solution of extremely fine T1O2 particles from a precursor of tetrabutyl titanate and the technique of layer-by-layer (LBL) self- assembly were used. The morphology, structure and the amount of T1O2 of the composite spheres were studied by SEM, XRD and X-ray energy spectrum. The results reveal that TiC>2 nanoparticles were dispersed on the surface of the composite spheres and were of rutile type structure with a spherical shape of about 50 ran in diameter. The surface of the composite spheres is dense and uniform. The content of titania in the composite spheres can be readily controlled by varying the number of the nanoparticle-surfactant deposition cycles. |
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Keywords: | NANOPHASE MATERIALS TITANIUM DIOXIDE SILICON DIOXIDE SDS WASTE WATER TREATMENT XRD SEM |
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