Structural and optical properties of solvothermally synthesized ZnS nano-materials using Na2S·9H2O and ZnSO4·7H2O precursors

Bo Hee Hwang, Hai Bo Xu, Su Jin Park, Sung Eun Choi, Sahn Nahm, Youn Woo Hong, Jong Hoo Paik, Tae Ho Shin, Jeong Su Kang

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5 Citations (Scopus)

Abstract

Hexagonal wurtzite (HWZ) ZnS nanorods were formed in specimens with a S/Zn ratio of 1.3, synthesized at temperatures ≥200. °C in a solution containing 80. vol% water and 20. vol% of ethylenediamine (EN). In contrast, HWZ ZnS nanoparticles were formed in specimens synthesized at temperatures lower than 200. °C. Also, cubic zinc blende (CZB) ZnS nanoparticles were formed in specimen synthesized in water. The absorption peak for the HWZ nanorods and CZB ZnS nanoparticles was at wavelength of 325. nm and 339. nm, respectively, indicating that the band gap energy of the former is larger than that of the latter. Moreover, the HWZ ZnS exhibited two emission peaks at 474. nm and 580. nm. The peak at 474. nm is attributed to Zn vacancies but the origin of the peak at 580. nm remains undetermined. Since the intensity of the emission peak at 580. nm was significantly higher for the HWZ nanoparticles than for nanorods, this peak might be associated with defects in the HWZ ZnS nanoparticles.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2016 Feb 16

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Keywords

  • Cubic zinc blende (CZB)
  • Hexagonal wurtzite (HWZ)
  • Solvothermally
  • ZnS nanorods

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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