One-dimenSional Z-scheme TiO2/WO3/Pt heterostructures for enhanced hydrogen generation
One-dimenSional Z-scheme TiO2/WO3/Pt heterostructures for enhanced hydrogen generation
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用于增强氢产生的一维 Z 型 TiO2/WO3/Pt 异质结构
DOI：
10.1016/j.apsusc.2016.06.170
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发表时间：
2017-01-01
影响因子：
6.7
通讯作者：
Shao, Guosheng
中科院分区：
文献类型：
--
作者：
Gao, Hongqing;Zhang, Peng;Shao, Guosheng
采用静电纺丝技术和空气中退火工艺制备了一维Z型TiO 2/WO 3/Pt异质结构。利用X射线衍射仪、扫描电子显微镜、透射电子显微镜、X射线光电子能谱仪和紫外-可见漫反射光谱仪对样品进行了表征。结果表明，与纯TiO 2纳米纤维（SO）和TiO 2/WO 3纳米纤维（S1）相比，所制备的一维Z型TiO 2/WO 3/Pt异质结构（S2）的H-2生成能力大大增强。电化学阻抗谱（EIS）和光电流分析表明，Pt纳米粒子作为电子收集器，WO 3作为空穴收集器，通过固态Z型光合异质结体系，有效地分离了半导体上的电荷，提高了光催化剂的活性。(C)2016爱思唯尔B. V.保留所有权利。
One-dimensional Z-scheme TiO2/WO3/Pt heterostructures were fabricated by integrating a facile electrospinning technique and subsequent annealing in air. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy, were used to characterize the as-fabricated samples. The results showed that the H-2-generation of the as-fabricated one-dimensional Z-scheme TiO2/WO3/Pt heterostructures (S2) was greatly enhanced compared with pure TiO2 nanofibers (SO) and TiO2/WO3 nanofibers (S1). The enhanced photocatalyst activities were mainly attributed to the solid-state Z-scheme photosynthetic heterojunction system with Pt nanoparticle as an electron collector and WO3 as a hole collector, leading to effective charge separation on these semiconductors, which were evidenced by electrochemical impedance spectroscopy (EIS) and photocurrent analysis. (C) 2016 Elsevier B.V. All rights reserved.