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

Research output: Contribution to journalArticlepeer-review

7 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
Pages (from-to)11700-11708
Number of pages9
JournalCeramics International
Volume42
Issue number10
DOIs
Publication statusPublished - 2016 Aug 1

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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