Regeneration of aged-AgNPs via density gradient ultracentrifugal nanoseparation

Jae Hoon Sim, Ha Nee Umh, Hyeon Ho Shin, Hwa Kyung Sung, Seung Yeon Oh, Byung Cheun Lee, Rengaraj Selvaraj*, Younghun Kim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


To reuse aged-silver nanoparticles (AgNPs) and recover the mono-dispersed AgNPs separately, we attempted to recycle the aged-AgNPs with high polydispersity in particle size distribution using the density gradient ultracentrifugation rate (DGUR) separation with five media. Results for the microscopic and spectroscopic showed that Tween series media, which have low density compared to other media, are suitable for the application of DGUR separation for recycling aged-AgNPs. This method might be helpful to regenerate and recycle the precious metal nanoparticles with polydispersity due to long-term storage.

Original languageEnglish
Pages (from-to)3157-3162
Number of pages6
JournalJournal of Industrial and Engineering Chemistry
Issue number5
Publication statusPublished - Sept 25 2014


  • Centrifugation
  • Density gradient
  • Nanoseparation
  • Recycling
  • Silver nanoparticles

ASJC Scopus subject areas

  • Chemical Engineering(all)


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