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Study on modification of colloidal silica surface with magnesium ions

Karami, A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jcis.2008.12.021
  3. Publisher: 2009
  4. Abstract:
  5. The prepared colloidal silica via ion exchange was modified by adding Mg+2 ions in the surface growth process of colloidal silica. The particle size of the modified colloidal silica was decreased by increasing the seed concentration, whereas that of colloidal silica was slightly increased as the seeds concentration exceed 15 wt%. But the trend of changes in surface area was completely reversed. Magnesium ions on surface of the modified colloidal silica were identified by the measurement of energy-dispersive X-ray spectrometry (EDS). After modifying with Mg+2 ions, the iso-electric point (IEP) of colloidal silica in pH ∼ 2 without modification, disappears over the whole pH range. © 2008 Elsevier Inc. All rights reserved
  6. Keywords:
  7. Colloidal silica ; Magnesium ions ; Sodium silicate ; Surface area ; pH range ; Seed concentration ; Silica surfaces ; Surface growth ; X ray spectrometry ; Ion exchange ; Ions ; Light metals ; Magnesium ; Magnesium printing plates ; Metal ions ; Silica ; Silicates ; Silicon compounds ; Oxides ; magnesium ion ; silicate ; silicic acid ; silicon dioxide ; article ; particle size ; pH ; priority journal ; scanning electron microscopy ; surface property ; zeta potential
  8. Source: Journal of Colloid and Interface Science ; 2009 , Pages 379-383 ; 00219797 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0021979708016044