High benzene selectivity of mesoporous silicate for BTX gas sensing microfluidic devices
| Autor: | Itaru Honma, Akiyuki Tate, Takeo Yamada, Osamu Niwa, Haoshen Zhou, Yuko Ueno |
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| Rok vydání: | 2004 |
| Předmět: |
Time Factors
Silicates Xylene Benzene Air Pollutants Occupational Microfluidic Analytical Techniques Xylenes Biochemistry Toluene Sensitivity and Specificity Silicate Analytical Chemistry Silanol chemistry.chemical_compound chemistry Chemical engineering Organic chemistry Particle Size Selectivity Mesoporous material Porosity Mesoporous silicate |
| Zdroj: | Analytical and bioanalytical chemistry. 382(3) |
| ISSN: | 1618-2642 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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