Thermal and plasma synthesis of metal oxide nanoparticles from MOFs with SERS characterization

Bing Han Li, Tsung Han Yu, Cheng Yu Weng, Chung Chun Yang, Chia Her Lin*, Szetsen Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Aluminum oxide (Al2O3) and chromium oxide (Cr2O3) nanoparticles were synthesized by thermolysis of metal-organic frameworks (MOFs). Further O2 plasma treatment is required to obtain high crystalline quality metal oxides. The composition and morphology of metal oxide nanoparticles were confirmed by powder X-ray diffraction and scanning electron microscopy characterization, respectively. The quality of synthesized metal oxides was also examined by observing the surface-enhanced Raman scattering (SERS) spectra of methyl orange adsorbed on Al2O3 and Cr2O3. The observed SERS effect can be ascribed to charge-transfer (CT) resonance effect between methyl orange and metal oxide surfaces. UV-vis absorption spectra and DFT calculations of metal oxide- methyl orange complexes have confirmed that the observed SRS effect is due to CT resonance between the metal oxide nanoparticles and the adsorbed methyl orange molecules.

Original languageEnglish
Pages (from-to)146-152
Number of pages7
JournalVibrational Spectroscopy
Volume84
DOIs
Publication statusPublished - 2016 May 1
Externally publishedYes

Keywords

  • Aluminum oxide
  • Chromium oxide
  • DFT
  • PXRD
  • SERS

ASJC Scopus subject areas

  • Spectroscopy

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