| Cr3+掺杂的TiO2纳米复合微粒的合成及表征 |
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| 引用本文： | 马占营,佘世雄,敏世雄,张力,苏碧桃.Cr3+掺杂的TiO2纳米复合微粒的合成及表征[J].兰州大学学报(自然科学版),2005,41(2):64-67. |
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| 作者姓名： | 马占营 佘世雄 敏世雄 张力 苏碧桃 |
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| 作者单位： | 甘肃省高分子材料重点实验室,西北师范大学,化学化工学院,甘肃,兰州,730070 |
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| 摘 要： | 利用酸催化的溶胶-凝胶法合成了一系列不同Cr3 掺杂量的TiO2纳米复合微粒.用XRD,TEM,UV-Vis等技术进行了结构表征.结果表明利用该法所合成的Cr3 /TiO2纳米复合微粒尺寸小(约10 nm),粒度分布范围窄;在所研究的掺杂量范围内(x:0～0.1000),该纳米复合粒子的粒径随Cr3 掺杂量的增加呈减小的趋势,但幅度不大.从XRD中,没有发现Cr2O3相的偏析和TiO2由锐钛矿向金红石的相转变;TiO2的衍射峰随Cr3 掺杂量的增加有宽化和强度减弱的现象.UV-Vis光谱结果显示:由于Cr3 的加入,该纳米复合微粒对光的吸收拓展到了可见区,同时随着Cr3 掺杂量的增加,对可见光的吸收强度显著增强.
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| 关 键 词： | 纳米复合微粒 溶胶-凝胶法 表征 |
| 文章编号： | 0455-2059(2004)02-0064-04 |
Synthesis and characterization of Cr3+-doped TiO2 composite nanoparticles |
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| MA Zhan-ying,SHE Shi-xiong,MIN Shi-xiong,ZHANG Li,SU Bi-tao.Synthesis and characterization of Cr3+-doped TiO2 composite nanoparticles[J].Journal of Lanzhou University(Natural Science),2005,41(2):64-67. |
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| Authors: | MA Zhan-ying SHE Shi-xiong MIN Shi-xiong ZHANG Li SU Bi-tao |
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| Abstract: | A series of Cr3+-doped TiO2 composite nanoparticles with different amount of doped Cr3+ were successfully synthesized using an acid-catalyzed sol-gel procedure. XRD, TEM, and UV-vis diffuse reflectance techniques were used to characterize this type of nanocomposites. TEM observation indicated that the average size of the particles was about 10 nm with a narrow distribution and the size of Cr3+/TiO2 particles slightly decreased with the increase of the amount of Cr3+. XRD results showed that TiO2 of the composite was of anatase and Cr2O3 phase did not appear. UV-vis spectra showed a red shift and a significant increase of absorption intensity in the visible region with increasing amount of doping Cr3+ to TiO2. |
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| Keywords: | composite nanoparticle sol-gel method characterization |
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