ii型ZnO/ZnS异质结构的生长和表面表征

IF 3.2 3区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry C Pub Date : 2025-10-09 DOI:10.1021/acs.jpcc.5c05124

P. R. A. de Oliveira, I. Coelho, G. Felix, P. Venezuela, F. Stavale

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引用次数: 0

摘要

我们报道了在清洁可控氧气氛下，通过ZnS（001）单晶的热氧化原位形成ii型ZnO/ZnS异质结构。通过结合x射线光电子能谱（XPS）和原子力显微镜（AFM），我们研究了所得界面的化学成分、电子结构和表面形貌。在我们的XPS测量中观察到的核能级变化表明，由于混合界面的形成，一个向上的带弯曲。原子力显微镜（AFM）测量表明，ZnO以层+岛模式生长，形成扭曲的六边形纳米岛。我们的能带对准分析证实了ii型异质结构具有合适的电子能带边缘位置，可以有效地进行电荷分离，突出了其作为光催化应用平台的潜力，例如氢和氧的析出反应（HER和OER）。

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Growth and Surface Characterization of a Type-II ZnO/ZnS Heterostructure

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Growth and Surface Characterization of a Type-II ZnO/ZnS Heterostructure

We report the in situ formation of a type-II ZnO/ZnS heterostructure via the thermal oxidation of a ZnS(001) single crystal under a clean controlled oxygen atmosphere. By combining X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), we investigated the chemical composition, electronic structure, and surface morphology of the resulting interface. Core-level shifts observed in our XPS measurements suggest an upward band-bending due to the formation of a hybrid interface. AFM measurements show that ZnO grows through a layer-plus-island mode, forming distorted hexagonal nanoislands. Our band alignment analysis confirms the type-II heterostructure arrangement with suitable electronic band-edge positions for efficient charge separation, highlighting its potential as a platform for photocatalytic applications, such as hydrogen and oxygen evolution reactions (HER and OER).

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来源期刊

The Journal of Physical Chemistry C 化学-材料科学：综合

CiteScore

6.50

自引率

8.10%

发文量

2047

审稿时长

1.8 months

期刊介绍： The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.