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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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a Low-magnification SEM micrograph of ZnO nanorods. b High-magnification SEM micrograph of ZnO nanorods. c Low-magnification SEM micrograph of ZnO–Sn2S3 nanorods. d High-magnification SEM micrograph of ZnO–Sn2S3 nanorods
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Fig1: a Low-magnification SEM micrograph of ZnO nanorods. b High-magnification SEM micrograph of ZnO nanorods. c Low-magnification SEM micrograph of ZnO–Sn2S3 nanorods. d High-magnification SEM micrograph of ZnO–Sn2S3 nanorods

Mentions: Figure 1a, b illustrates the morphology of the ZnO nanorods. The surfaces of the ZnO nanorods were smooth with a hexagonal crystal feature. Figure 1c, d depicts the morphologies of the ZnO–Sn2S3 core–shell nanorods. SEM micrographs demonstrated that the hexagonal ZnO nanorods became circular, and the surfaces of the ZnO–Sn2S3 nanorods exhibited undualations and a visible sheet-like crystal texture. The sheet-like crystallites on the surfaces of the ZnO–Sn2S3 core–shell nanorods had sharp peripheries and were homogeneously distributed on the ZnO nanorods. The SEM micrographs showed that the surfaces of the ZnO–Sn2S3 nanorods were rougher than those of the ZnO nanorods, thus the ZnO–Sn2S3 nanorods had larger surface areas.Fig. 1


Photoexcited Properties of Tin Sulfide Nanosheet-Decorated ZnO Nanorod Heterostructures
a Low-magnification SEM micrograph of ZnO nanorods. b High-magnification SEM micrograph of ZnO nanorods. c Low-magnification SEM micrograph of ZnO–Sn2S3 nanorods. d High-magnification SEM micrograph of ZnO–Sn2S3 nanorods
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5383909&req=5

Fig1: a Low-magnification SEM micrograph of ZnO nanorods. b High-magnification SEM micrograph of ZnO nanorods. c Low-magnification SEM micrograph of ZnO–Sn2S3 nanorods. d High-magnification SEM micrograph of ZnO–Sn2S3 nanorods
Mentions: Figure 1a, b illustrates the morphology of the ZnO nanorods. The surfaces of the ZnO nanorods were smooth with a hexagonal crystal feature. Figure 1c, d depicts the morphologies of the ZnO–Sn2S3 core–shell nanorods. SEM micrographs demonstrated that the hexagonal ZnO nanorods became circular, and the surfaces of the ZnO–Sn2S3 nanorods exhibited undualations and a visible sheet-like crystal texture. The sheet-like crystallites on the surfaces of the ZnO–Sn2S3 core–shell nanorods had sharp peripheries and were homogeneously distributed on the ZnO nanorods. The SEM micrographs showed that the surfaces of the ZnO–Sn2S3 nanorods were rougher than those of the ZnO nanorods, thus the ZnO–Sn2S3 nanorods had larger surface areas.Fig. 1

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.