Effects of surface-active substances on acid-base indicator reactivity in SiO2 gels

Zhijian Wu, Kangtaek Lee, Yanxin Lin, Xinren Lan, Liyao Huang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Methyl orange (MO) and phenolphthalein (P) doped SiO2 gels derived from tetraethyl orthosilicate (TEOS) and modified with cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and stearic acid (SA) are prepared. FTIR and TG analyses are used to characterize the gels. The color changes and leaching behavior of MO and P within the gels are investigated and explained on the basis of the gel structures and the reaction mechanism. The experimental results show that surface-active substances have obvious effects on the acid-base response and the leaching behavior of the acid-base indicators within the SiO2 gels.

Original languageEnglish
Pages (from-to)168-176
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume320
Issue number1-3
DOIs
Publication statusPublished - 2003 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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