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Surface modification of inorganic nanomaterials through functionalization with organic capping agents may be regarded as a very useful and hand-on strategy to avoid particle agglomeration, thus improving the current properties and even to design new ones. In this context, we here report a simple, low-cost and high-yielding method for the fabrication of semiconductor zinc sulphide nanoparticles (ZnS NPs) by chemical co-precipitation, using the new capping agents tris(hydroxymethyl)aminomethane (TRIS) and 4-(2-hydroxyphenyl)-2-(morpholin-4-yl)-1,3-thiazole (DF). Powder X-ray diffraction (PXRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infrared spectroscopy (FTIR) and UV–visible spectroscopy allowed to confirm the important effect of the adopted capping agents in the preparation of ZnS NPs with size reduction from ca. 40 nm in unmodified ZnS NPs to ca. 10 nm in ZnS NPs modified with either TRIS or DF capping agents. Such an effect comes along with enhanced photoluminescence of the organo-modified ZnS NPs, with the maximum emission centred at 560 nm, and an increase of the band gap energy from 3.71 eV in unmodified ZnS NPs to 3.83 eV in organo-modified ZnS NPs.

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Fabrication of Very Fine ZnS Nanoparticles Through Surface Organo-Modification

  • 会议论文

  • 发表日期：

    2025年

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  • Ionela-Mădălina Duinea,
  • Aurel Tăbăcaru,
  • Paul Chiriță,
  • Nicoleta Cioateră,
  • Alina-Mihaela Ceoromila,
  • Geta Cârâc

摘要

Surface modification of inorganic nanomaterials through functionalization with organic capping agents may be regarded as a very useful and hand-on strategy to avoid particle agglomeration, thus improving the current properties and even to design new ones. In this context, we here report a simple, low-cost and high-yielding method for the fabrication of semiconductor zinc sulphide nanoparticles (ZnS NPs) by chemical co-precipitation, using the new capping agents tris(hydroxymethyl)aminomethane (TRIS) and 4-(2-hydroxyphenyl)-2-(morpholin-4-yl)-1,3-thiazole (DF). Powder X-ray diffraction (PXRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infrared spectroscopy (FTIR) and UV–visible spectroscopy allowed to confirm the important effect of the adopted capping agents in the preparation of ZnS NPs with size reduction from ca. 40 nm in unmodified ZnS NPs to ca. 10 nm in ZnS NPs modified with either TRIS or DF capping agents. Such an effect comes along with enhanced photoluminescence of the organo-modified ZnS NPs, with the maximum emission centred at 560 nm, and an increase of the band gap energy from 3.71 eV in unmodified ZnS NPs to 3.83 eV in organo-modified ZnS NPs.