SnO2 / TiO2 composite nanoparticles have been synthesized in a single-step by feeding evaporated precursor mixtures into an atmospheric pressure diffusion flame. Particles with controlled Ti: Sn ratios were produced at various flow rates of oxygen, and the resulting powders were characterized by BET surface area analysis, XRD, TEM, EDAX and UV-Vis spectroscopy. For the lowest concentration (3.4 mol %) of SnO2 employed in this study anatase phase of TiO2 is stabilized, while segregation of SnO2 is seen at medium (6.9 to 12.4 mol %) and high concentrations (20.3 mol %). Though the equilibrium phase diagram predicts complete solubility of one oxide in another at all compositions, segregation of SnO2 phase is observed which is explained by the usage of diffusion flame in the present study. The particle formation mechanism of SnO2 / TiO2 composites is proposed basing on the single component aerosol formation. Photocatalytic activity of the composite particles is tested for the degradation of methylene blue and is compared with pure TiO2 synthesized under similar conditions. Improved photocatalytic activity of the composite particles is attributed to the stabilized anatase phase and better charge separation due to the coupling of TiO2 and SnO2 within the composite nanoparticles."> 光催化氧化SnO2 / TiO2复合纳米粒子的一步火焰合成 - raybet雷竞app,雷竞技官网下载,雷电竞下载苹果

国际光能杂志

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体积 7 |文章的ID 575146 | https://doi.org/10.1155/S1110662X05000231

Kranthi K. Akurati, Andri Vital, Roland Hany, Bastian Bommer, Thomas Graule, Markus Winterer 一步火焰合成 SnO 2 / TiO 2 用于光催化应用的复合纳米颗粒",国际光能杂志 卷。7 文章的ID575146 9 页面 2005 https://doi.org/10.1155/S1110662X05000231

一步火焰合成 SnO 2 / TiO 2 用于光催化应用的复合纳米颗粒

摘要

SnO 2 / TiO 2 通过将蒸发的前驱体混合物放入常压扩散火焰中,一步即可合成复合纳米粒子。采用BET比表面积分析、XRD、TEM、EDAX和UV-Vis光谱对所得粉体进行了表征。为最低浓度(3.4 mol %) SnO 2 本研究采用锐钛矿相 TiO 2 是稳定的,而隔离的 SnO 2 见于中(6.9 - 12.4 mol %)和高浓度(20.3 mol %)。虽然平衡相图预测了一种氧化物在另一种成分中的完全溶解度,但分离 SnO 2 在本研究中使用扩散火焰来解释这一现象。颗粒形成机理 SnO 2 / TiO 2 复合材料是在单组分气溶胶形成的基础上提出的。测试了复合粒子对亚甲基蓝的光催化降解活性,并与纯粒子进行了比较 TiO 2 在类似条件下合成。复合粒子的光催化活性的提高是由于锐钛矿相的稳定和电荷的更好的分离 TiO 2 SnO 2 在复合纳米颗粒中。

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