奥斯特瓦尔德成熟
光催化
材料科学
纳米结构
化学工程
钛
氨
氨硼烷
催化作用
纳米技术
氢
制氢
化学
有机化学
冶金
工程类
作者
Haiqing Wang,Haifeng Lin,Yong Long,Bing Ni,Ting He,Simin Zhang,Huihui Zhu,Xun Wang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2017-01-01
卷期号:9 (5): 2074-2081
被引量:24
摘要
A one-pot and template-free strategy for synthesizing hollow TiO2 nanostructures (HTSs) is developed by using titanocene dichloride as a titanium source, acetone as a solvent, and ammonia as a basic source. Transmission electron microscopy (TEM) observations demonstrate that the morphology transformation undergoes solid, yolk–shell and then hollow structures, typical of an Ostwald ripening process. Comparative experiments suggest that the mismatched hydrolysis rate of chloride anion and organic cyclopentadiene in unique titanocene dichloride (Cp2TiCl2) molecules should be responsible for the formation of HTSs. The TiO2 nanostructures exhibit controllable morphologies and tunable sizes by mainly adjusting the amounts of the titanium precursor or ammonia. The HTSs show much improved photocatalytic performance as compared with samples of other morphologies in water splitting application, due to the remarkably increased surface area and active sites, and enhanced mass transfer. Our findings reported herein may offer new perspectives in materials chemistry, and energy- and environment-related applications.
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