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Photoexcited Properties of Tin Sulfide Nanosheet-Decorated ZnO Nanorod Heterostructures

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ABSTRACT

In this study, ZnO–Sn2S3 core–shell nanorod heterostructures were synthesized by sputtering Sn2S3 shell layers onto ZnO rods. The Sn2S3 shell layers consisted of sheet-like crystallites. A structural analysis revealed that the ZnO–Sn2S3 core–shell nanorod heterostructures were highly crystalline. In comparison with ZnO nanorods, the ZnO–Sn2S3 nanorods exhibited a broadened optical absorption edge that extended to the visible light region. The ZnO–Sn2S3 nanorods exhibited substantial visible photodegradation efficiency of methylene blue organic dyes and high photoelectrochemical performance under light illumination. The unique three-dimensional sheet-like Sn2S3 crystallites resulted in the high light-harvesting efficiency of the nanorod heterostructures. Moreover, the efficient spatial separation of photoexcited carriers, attributable to the band alignment between ZnO and Sn2S3, accounted for the superior photocatalytic and photoelectrochemical properties of the ZnO–Sn2S3 core–shell nanorod heterostructures.

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XRD pattern of ZnO–Sn2S3 nanorods
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Fig2: XRD pattern of ZnO–Sn2S3 nanorods

Mentions: Figure 2 shows the XRD pattern of the ZnO–Sn2S3 nanorods. The XRD pattern displays an intense and sharp Bragg reflection centered at approximately 34.4°, which is ascribed to the (002) crystallographic plane of the hexagonal ZnO nanorods (JCPDS no. 05-0664). The ZnO nanorods were highly crystalline, and the grains were oriented along the c-axis. Moreover, the XRD pattern displays three other sharp Bragg reflections with relatively low intensities centered at approximately 26.5°, 30.8°, and 31.9°. These Bragg reflections originated from the (111), (310), and (211) crystallographic planes of the orthorhombic Sn2S3 (JCPDS no. 14-0619). The XRD pattern indicates that the as-deposited Sn2S3 shell layer was polycrystalline, and the as-synthesized ZnO–Sn2S3 nanorods were highly crystalline.Fig. 2


Photoexcited Properties of Tin Sulfide Nanosheet-Decorated ZnO Nanorod Heterostructures
XRD pattern of ZnO–Sn2S3 nanorods
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC5383909&req=5

Fig2: XRD pattern of ZnO–Sn2S3 nanorods
Mentions: Figure 2 shows the XRD pattern of the ZnO–Sn2S3 nanorods. The XRD pattern displays an intense and sharp Bragg reflection centered at approximately 34.4°, which is ascribed to the (002) crystallographic plane of the hexagonal ZnO nanorods (JCPDS no. 05-0664). The ZnO nanorods were highly crystalline, and the grains were oriented along the c-axis. Moreover, the XRD pattern displays three other sharp Bragg reflections with relatively low intensities centered at approximately 26.5°, 30.8°, and 31.9°. These Bragg reflections originated from the (111), (310), and (211) crystallographic planes of the orthorhombic Sn2S3 (JCPDS no. 14-0619). The XRD pattern indicates that the as-deposited Sn2S3 shell layer was polycrystalline, and the as-synthesized ZnO–Sn2S3 nanorods were highly crystalline.Fig. 2

View Article: PubMed Central - PubMed

ABSTRACT

In this study, ZnO–Sn2S3 core–shell nanorod heterostructures were synthesized by sputtering Sn2S3 shell layers onto ZnO rods. The Sn2S3 shell layers consisted of sheet-like crystallites. A structural analysis revealed that the ZnO–Sn2S3 core–shell nanorod heterostructures were highly crystalline. In comparison with ZnO nanorods, the ZnO–Sn2S3 nanorods exhibited a broadened optical absorption edge that extended to the visible light region. The ZnO–Sn2S3 nanorods exhibited substantial visible photodegradation efficiency of methylene blue organic dyes and high photoelectrochemical performance under light illumination. The unique three-dimensional sheet-like Sn2S3 crystallites resulted in the high light-harvesting efficiency of the nanorod heterostructures. Moreover, the efficient spatial separation of photoexcited carriers, attributable to the band alignment between ZnO and Sn2S3, accounted for the superior photocatalytic and photoelectrochemical properties of the ZnO–Sn2S3 core–shell nanorod heterostructures.

No MeSH data available.