High benzene selectivity of mesoporous silicate for BTX gas sensing microfluidic devices

Yuko Ueno, Akiyuki Tate, Osamu Niwa, Hao Shen Zhou, Takeo Yamada, Itaru Honma

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The gas selectivities of highly ordered mesoporous silicates and commercially-obtained porous silicates with respect to benzene, toluene and xylene were studied. After studying the porosities, pore uniformities, and surface silanol structures of the silicates and their relationships to gas selectivity in detail, we found that we could achieve high benzene selectivity by controlling the micropore size (less than 1 nm). Concluding that mesoporous silicate has a suitable micropore size and structure for benzene selectivity, we also observed that mesoporous silicate SBA-16 exhibited a high (>6) benzene selectivity from toluene and xylene even in a pseudo-atmospheric environment. A benzene detection limit of about 100 ppb was achieved by introducing SBA-16 into a microfluidic device originally developed for the separate detection of benzene, toluene, and xylene gases.

Original languageEnglish
Pages (from-to)804-809
Number of pages6
JournalAnalytical and Bioanalytical Chemistry
Volume382
Issue number3
DOIs
Publication statusPublished - 2005 Jun 1
Externally publishedYes

Keywords

  • BTX gas
  • Mesoporous silicate
  • Microfluidic device
  • Micropore
  • Molecular selectivity

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

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