PdO/TiO2 and Pd/TiO2 Heterostructured Nanobelts with Enhanced Photocatalytic Activity
PdO/TiO2 and Pd/TiO2 Heterostructured Nanobelts with Enhanced Photocatalytic Activity
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具有增强光催化活性的 PdO/TiO2 和 Pd/TiO2 异质结构纳米带
DOI：
10.1002/asia.201301638
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发表时间：
2014
影响因子：
4.1
通讯作者：
Chen Shaowei
中科院分区：
文献类型：
--
作者：
Zhou Weijia;Guan Yu;Wang Dongzhou;Zhang Xinhai;Liu Duo;Jiang Huaidong;Wang Jiyang;Liu Xiaogang;Liu Hong;Chen Shaowei
异质结构不仅在半导体器件的制造中起着重要的作用，而且在催化领域也起着重要的作用。本文报道了通过简单的共沉淀法合成PdO/TiO 2和Pd/TiO 2异质结构纳米带，然后使用表面改性的TiO 2纳米带作为模板进行还原过程。通过透射电子显微镜、X射线光电子能谱和UV/维斯漫反射光谱对所获得的异质结构进行表征。PdO和Pd纳米粒子的尺寸约为1.3和1.6 nm的均匀组装在TiO 2纳米带的表面，分别。 与TiO 2纳米带相比，PdO/TiO 2和Pd/TiO 2杂化纳米带在紫外光和可见光照射下表现出更强的光催化活性。利用光电化学技术研究了异质结构对提高光催化活性的影响。我们的机理研究表明，能带匹配是观察到的光催化活性增强的主要因素。
Heterostructures play an important role not only in the manufacture of semiconductor devices, but also in the field of catalysis. Herein, we report the synthesis of PdO/TiO2and Pd/TiO2heterostructured nanobelts by means of a simple co‐precipitation method, followed by a reduction process using surface‐modified TiO2nanobelts as templates. The as‐obtained heterostructures were characterized by transmission electron microscopy, X‐ray photoelectron spectroscopy, and UV/Vis diffuse reflectance spectroscopy. PdO and Pd nanoparticles with a size of about 1.3 and 1.6 nm were assembled uniformly on the surface of TiO2nanobelts, respectively. Compared with TiO2nanobelts, PdO/TiO2and Pd/TiO2hybrid nanobelts exhibit enhanced photocatalytic activity upon UV and visible‐light irradiation. Photoelectrochemical technology was used to study the heterostructure effect on enhanced photocatalytic activity. Our mechanistic investigation revealed that energy‐band matching is the major factor in the observed enhancement of photocatalytic activity.