Structure-controlled CdS(0D, 1D, 2D) embedded onto 2D ZnS porous nanosheets for highly efficient photocatalytic hydrogen generation
Structure-controlled CdS(0D, 1D, 2D) embedded onto 2D ZnS porous nanosheets for highly efficient photocatalytic hydrogen generation
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结构控制的 CdS（0D、1D、2D）嵌入 2D ZnS 多孔纳米片，用于高效光催化制氢
DOI：
10.1039/c7ra02565c
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发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Zhu, Zhenping
中科院分区：
文献类型：
--
作者：
Wang, Junmei;Wang, Zhijian;Zhu, Zhenping
光催化剂的形态特征对其太阳能转化的光催化活性至关重要。本论文通过对0维、1维和2维结构的硫化镉的几何尺寸和禁带宽度的调制和调节，研究了由硫化锌纳米片组成的铂-硫化锌/硫化镉复合材料用于太阳能制氢。光催化活性结果表明，在铂锌硫化物/硫化镉异质结中，硫化镉的形状和形态对光催化性能有重要影响。具有一维结构的硫化镉沉积在多孔铂-锌纳米薄膜上，使异质结具有更高的光生电子空穴对的分离和输运效率。瞬时光电流响应和光致发光进一步证实了所提出的增强抑制电荷复合的机理。
The morphological characteristics of a photocatalyst is central to its photocatalytic activity for solar energy conversion. Herein, Pt-ZnS/CdS composites comprising ZnS nanosheets, embedded via the geometry and size modulation and tuning of band gap of CdS with 0D, 1D or 2D structure, were investigated for solar hydrogen production. The photoactivity results indicate that the shape and morphology of CdS in the Pt-ZnS/CdS heterojunction play a pivotal role in affecting the photocatalytic performance. CdS with a 1D structure deposited on porous Pt-ZnS nanosheets endow the heterojunction with increased efficiency for the separation and transport of photoinduced electron-hole pairs. The proposed mechanism for the boosted suppression of charge recombination was further confirmed by the transient photocurrent response and photoluminescence.