光催化
三乙醇胺
材料科学
钛酸钙
热液循环
粒径
水溶液
分解
化学工程
色散(光学)
纳米颗粒
形态学(生物学)
粒子(生态学)
水热合成
醋酸
纳米技术
矿物学
化学
复合材料
陶瓷
分析化学(期刊)
催化作用
有机化学
光学
工程类
物理
海洋学
生物
地质学
遗传学
作者
Takeshi Kimijima,Atsushi Muramatsu,Masafumi Nakaya,Atsushi Muramatsu
出处
期刊:CrystEngComm
[The Royal Society of Chemistry]
日期:2014-01-01
卷期号:16 (25): 5591-5597
被引量:60
摘要
Calcium titanate fine particles controlled precisely in size and morphology were synthesized by an optimized hydrothermal method. Their photocatalytic activity was evaluated as the effect of the particle morphology, that is, the exposed surface. The size and morphology were successfully controlled with aging temperature and alternative use of Ti-sources, such as a TiO2 dispersion and titanium–triethanolamine complex. The photocatalytic activity of the CaTiO3 fine particles was measured by the evolution amount of H2 from a methanolic aqueous solution and the decomposition of acetic acid in water. As a result, rod-like particles showed the highest photocatalytic activity for H2 evolution. On the other hand, cubic-shaped particles exhibited a higher activity for the decomposition of acetic acid. Judging from electron diffraction images, both the cubic and rod-like particles were bound by {110} and {001} facets, but the rate of the {110} faces of the rod-like particles was much more than that of the cubic ones. The proper selection of the particle shape, outer surface is one of the key factors for the photocatalytic activity.
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