Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 166, Issue -, Pages 246-252Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.02.053
Keywords
Mesoporous silica materials; QCM sensor; Heavy metal ions; Mercury; Real time detection
Funding
- National Nature Science Foundation of China [61071040]
- Leading Academic Discipline Project of Shanghai Municipal Education Commission [J50102]
- National Nature Science Foundation of Shanghai [11ZR1412600]
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Thiol-functionalized SBA-15 mesoporous silica materials with various pore sizes and specific surface areas were prepared by using a post-grafting process. All the obtained materials were characterized by SAXS, FT-IR, TGA, TEM and N-2 adsorption isotherms. By using these functionalized mesoporous silica as sensing materials, the QCM sensor was constructed and used for detecting heavy metal ions. The experimental results indicated that the QCM sensor can detect 1 ppm Hg2+ with the response frequency of 175 Hz in the response time of 1 min. The influence of response time, the amount of thiol groups, pore size and specific surface area of SBA-15 mesoporous silica on Hg2+ detection was studied systematically in this paper. (C) 2012 Elsevier B.V. All rights reserved.
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