Summary of the project:
Thin mesoporous (or nanoporous, in this case) silica films have been formed by spin coating a sol-gel reaction mixture from the liquid phase. The pores consist of hexagonal channels of controllable diameter of either 5 nm or 20 nm approximately. This has been verified by AFM, BET etc. Subsequently the pores have been functionalized with OTS or TMCS to make them hydrophobic, so as to make only benzene selectively adsorb in the pores, whereas water is not. As a result it can be used as a way of detecting and separating benzene at a very low concentration of tens of ppm in an aqueous mixture. The adsorption dynamics and equilibrium has been followed by UV-Visible absorbance of peak of benzene. This can be used as a sensor, which can detect very fast, and work reversibly on the basis of presence or absence of a response stimulus, like benzene.
2. Investigator(s) Name & Institute: Rajdip Bandyopadhyaya
Chemical Engg. Dept.
Indian Institute of Technology Kanpur
(previous affiliation of the PI)
Project Title: Scanning mobility particle sizer (SMPS) for gas-borne nanoparticulate systems
Project Status: Equipment installed and project completed
Duration: 1 year
Date of start: 10. 9. 2005.
Funding agency: IIT Kanpur
Total cost: Rs. 31.8 lakhs
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