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Journal of Materials Science
Erschienen in: Journal of Materials Science 4/2019

26.10.2018 | Chemical routes to materials

Fabrication of core–shell TiO2@CuS nanocomposite via a bifunctional linker-assisted synthesis and its photocatalytic performance

verfasst von: Jianqi Ma, Quanchao Du, Hongguang Ge, Qiang Zhang

Erschienen in: Journal of Materials Science | Ausgabe 4/2019

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Abstract

Monodisperse anatase TiO2 microspheres were prepared by a modified sol–gel method and then coupled with CuS nanoparticles (NPs) to prepare non-core–shell TiO2/CuS composite (denoted as TiO2/CuS) and core–shell TiO2@CuS composite (denoted as TiO2@CuS), respectively, by two different fabricating methods, namely direct deposition and bifunctional linker-assisted assembly. The morphological, structural, and optical properties of both the TiO2/CuS and TiO2@CuS composites were characterized using TEM, HR-TEM, EDS mapping images, XRD, XPS, and UV–Vis DRS. Their visible-light-driven photocatalytic performance for degradation of methylene blue was comparatively studied. Results indicate: (1) as bifunctional linker between CuS and TiO2, 2,3-dimercapto-succinic acid (DMSA) enables CuS NPs to be anchored tightly onto the DMSA-functionalize TiO2 surface with small particle size, narrow size distribution, conformal coverage, intimate contact, and strong interaction with TiO2 to form TiO2@CuS. (2) Without using DMSA, the directly deposited CuS NPs tend to aggregate and are loaded randomly and loosely on the bare TiO2 without forming well-defined heterojunction due to the lattice mismatch between CuS and TiO2, even some CuS NPs are detached from the surface of TiO2 and thus TiO2/CuS was obtained. (3) TiO2@CuS exhibits superior synergistic effect and corresponding photocatalytic activity to TiO2/CuS, and the significant difference between their photocatalytic properties is mainly attributed to their distinct microstructure caused by the different assembling methods.
Vorheriger Artikel Investigation of compositionally tunable localized surface plasmon resonances (LSPRs) of a series of indium tin oxide nanocrystals prepared by one-step solvothermal synthesis
Nächster Artikel Highly selective catalytic conversion of lignin-derived phenolic compounds to cycloalkanes over a hierarchically structured zeolite catalyst

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Metadaten
Titel
Fabrication of core–shell TiO2@CuS nanocomposite via a bifunctional linker-assisted synthesis and its photocatalytic performance
verfasst von
Jianqi Ma
Quanchao Du
Hongguang Ge
Qiang Zhang
Publikationsdatum
26.10.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 4/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-3054-1

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