Aggregation behavior of nanodiamonds and their functionalized analogs in an aqueous environment

Chintal Desai, Kun Chen, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The colloidal behavior of aqueous dispersions of detonation nanodiamonds (DNDs) and carboxylated nanodiamonds (DND-COOH) which were synthesized via a microwave process is presented. Both forms of DNDs were found to be relatively stable in aqueous solutions, but aggregated rapidly in the presence of mono and divalent salts. The critical coagulation concentration (CCC) values for DNDs and DND-COOH were estimated to be between 8 and 10 mM for NaCl and 7 and 8 mM for MgCl2. In general, the formation of carboxyl groups on the DND surface did not alter colloidal behavior as dramatically as it is known to do for other nanocarbons especially carbon nanotubes.

Original languageEnglish (US)
Pages (from-to)518-523
Number of pages6
JournalEnvironmental Sciences: Processes and Impacts
Volume16
Issue number3
DOIs
StatePublished - Mar 2014

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Public Health, Environmental and Occupational Health
  • Management, Monitoring, Policy and Law

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