Hydrothermal synthesis and properties of solid solutions and composite nanoparticles in the TiO2–SnO2 system
Hydrothermal synthesis and properties of solid solutions and composite nanoparticles in the TiO2–SnO2 system
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DOI：
10.1016/j.materresbull.2011.05.016
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发表时间：
2011-09
影响因子：
5.4
通讯作者：
M. Hirano;H. Dozono;T. Kono
中科院分区：
文献类型：
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作者：
M. Hirano;H. Dozono;T. Kono
在弱碱性条件下，以TiCl 4和SnCl 4为前驱体，在尿素存在下，通过水热处理直接形成TiO 2-SnO 2体系固溶体和复合纳米粒子。在Ti含量为0- 70mol%范围内，形成了金红石型（Ti，Sn）O2固溶体。当Ti含量为80和90mol%时，形成了由金红石型和金红石型相组成的复合纳米粒子。金红石型固溶体的晶格参数a0和c 0的变化遵循Vegard定律。金红石型固溶体的晶粒尺寸在5- 10 nm之间。漫反射光谱随析出相中Ti含量的变化而变化。在240°C下合成的复合纳米粒子的光催化活性高于在180°C下合成的复合纳米粒子。由金红石型和金红石型相组成的复合纳米粒子具有Ti 0. 90 Sn 0. 10 O2和Ti 0. 80 Sn 0. 20 O2的光催化活性提高。
Solid solutions and composite nanoparticles in the TiO2–SnO2system were directly formed via the hydrothermal treatment of precursor solutions of TiCl4and SnCl4under weakly basic conditions in the presence of urea. The rutile-type (Ti, Sn)O2solid solutions were formed in the composition range of Ti 0–70mol%. The composite nanoparticles consisting of anatase- and rutile-type phases were formed at the composition of Ti 80 and Ti 90mol%. The change in the lattice parameters a0and c0of the rutile-type solid solutions followed the Vegard Law. The crystallite size of the rutile-type solid solutions was in the range of 5–10nm. The diffuse reflectance spectra varied with changing Ti content in the precipitates. The photocatalytic activity of composite nanoparticles synthesized at 240°C was higher than that synthesized at 180°C. The composite nanoparticles consisting of anatase- and rutile-type phases with compositions Ti0.90Sn0.10O2and Ti0.80Sn0.20O2showed improved photocatalytic activity.