Growth Behavior of TiO2 Particles via the Liquid Phase Deposition Process
Growth Behavior of TiO2 Particles via the Liquid Phase Deposition Process
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DOI：
10.2109/jcersj2.115.831
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发表时间：
2007
影响因子：
1.1
通讯作者：
Kiyofumi Katagiri;K. Ohno;Y. Masuda;K. Koumoto
中科院分区：
文献类型：
--
作者：
Kiyofumi Katagiri;K. Ohno;Y. Masuda;K. Koumoto
通过液相沉积（LPD）方法从水溶液中获得TiO2颗粒。结晶锐钛矿型 TiO2 颗粒可以在 100°C 以下直接从水溶液中制备。通过动态光散射 (DLS) 测量和透射电子显微镜 (TEM) 研究了 LPD 过程中 TiO2 颗粒的生长行为。从DLS测量来看，颗粒生长过程呈现S形曲线，可分为三个阶段，即初始阶段、加速阶段和完成阶段。 TEM 测量表明，初级颗粒的直径约为。初始阶段沉积了50 nm。在加速阶段，这些初级颗粒聚集形成直径约为 100 微米的覆盆子状颗粒。 300纳米。最后，在完成阶段颗粒进一步聚集而沉淀出微米尺寸。
TiO2 particles were obtained from aqueous solutions by the liquid phase deposition (LPD) method. The crystalline anatase TiO2 particles could be prepared below 100°C directly from aqueous solutions. The growth behavior of TiO2 particles via the LPD process was investigated by dynamic light scattering (DLS) measurement and transmission electron microscopy (TEM). From DLS measurement, the particle growth process shows a sigmoidal curve and can be divided into three stages, i.e., the initial stage, the acceleration stage, and the completion stage. TEM measurements revealed that the primary particles with a diameter of ca. 50 nm were deposited at the initial stage. At the acceleration stage, these primary particles were assembled to form raspberry-like particles with a diameter of ca. 300 nm. Finally, the particles were precipitated by further aggregation with the micro-meter size at the completion stage.