One-dimensional CdS/ZnO core/shell nanofibers via single-spinneret electrospinning: tunable morphology and efficient photocatalytic hydrogen production
One-dimensional CdS/ZnO core/shell nanofibers via single-spinneret electrospinning: tunable morphology and efficient photocatalytic hydrogen production
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DOI：
10.1039/c3nr03462c
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Ding, Shujiang
中科院分区：
文献类型：
--
作者：
Yang, Guorui;Yan, Wei;Ding, Shujiang
一维核/壳纳米结构由两种不同的半导体组成，具有适当的能带排列，由于其有效的光捕获和快速的载流子传输，有希望用于光催化制氢。本文采用单筒静电纺丝法成功制备了CdS/ZnO核/壳纳米纤维。ZnO层状结构（厚度为60 nm）均匀生长到连续CdS芯纤维（直径为220 nm，长度为几微米）上。所制备的CdS/ZnO核/壳纳米纤维作为纳米异质结光催化剂具有优异的可见光催化活性和稳定性。根据实验观察，提出了CdS/ZnO核/壳纳米纤维可能的形成机制。此外，所制备的纳米纤维的形貌和成分可以很容易地通过调节退火温度和Zn/Cd比的前体溶液控制。
One dimensional core/shell nanostructures consisting of two different semiconductors with appropriate band alignment are promising for photocatalytic hydrogen production due to their efficient light harvesting and fast carrier transport. In this work, CdS/ZnO core/shell nanofibers were successfully synthesized by one-pot single-spinneret electrospinning. The ZnO layered structures (60 nm in thickness) were uniformly grown onto continuous CdS core fibers (220 nm in diameter and several micrometers in length). The as-fabricated CdS/ZnO core/shell nanofibers as nanoheterojunction photocatalysts exhibited excellent visible light photocatalytic activity and stability for hydrogen production. The possible formation mechanism of the CdS/ZnO core/shell nanofibers was also proposed based on the experimental observations. Moreover, the morphologies and components of the as-prepared nanofibers can be controlled easily by tuning the annealing temperature and Zn/Cd ratios of the precursor solution.