Faculty
GIRIDHAR MADRAS
Professor

Phone : +91-80-2293 2321
Email : giridhar at iisc.ac.in
Click here to visit the Group Page


Education

- B.E., Chemical Engineering, Annamalai University (1988)
- M.Tech., Chemical Engineering, IIT Madras (1989)
- Ph.D., Chemical Engineering, Texas A&M University (1993)

Courses

- CH 202 Numerical Methods
- CH 207 Applied Statistics and Design of Experiments
- CH 237 Polymer Science and Engineering

Research

Our research group focuses on reaction kinetics, as applied to various systems and processes in the environmental and energy sector. Some of the major focus areas are as follows:

Reaction with Macromolecules

Degradation of plastics in solution is a new process and we are studying the kinetics and degradation rate of various polymers in solution. We have developed continuous distribution kinetic models to determine the rate parameters and the activation energies for polymer degradation from the time evolution of the molecular weight distributions. We have investigated the use of ultrasound, acids, microwaves and UV light as a means for polymerization and degradation. The kinetics of the reactions have been investigated and radical mechanisms are proposed to satisfactorily explain the experimental data. We have also developed new polymers as hydrogels and for use in tissue engineering.

Catalytic Reactions

Our approach is to develop several new materials that are used as catalysts for known reactions. We also propose new reaction pathways/mechanisms providing us with a method to develop new materials with superior properties. In this regard, we have synthesized new materials that work as photocatalysts for the degradation of a wide variety of dyes and organics that are common pollutants in waste water. We have also developed new catalysts for the three way catalysis and CO and hydrocarbon oxidation and proposed new mechanisms governing these reactions. All the catalytic reactions investigated in our studies have applications in the energy and environmental industries.

Reactions and Separations in Supercritical Fluids

Supercritical fluids have proven useful for the processing of biological materials and may provide an attractive alternative solvent for enzymatic catalysis. We are studying the use of lipases for transesterfication, esterification and hydrolysis reactions, which result in products that are used in the pharmaceutical and food industries. We have shown that cheap enzymes may be effectively used to achieve much higher conversions in supercritical carbon dioxide than that obtained in non-aqueous organic media like hexane. We also investigate the solubility and adsorption equilibria of organics in this media and develop new models for correlating the experimental results.
 
- J.C. Bose National Fellowship, 2015
- IISc award for excellence in research, 2015
- Fellow, Indian National Science Academy (INSA)
- Fellow, Indian National Academy of Engineering (INAE)
- Fellow, Indian Academy of Sciences (IASc)
- Fellow, National Academy of Science, India (NASI)
- S.S. Bhatnagar Award, 2009, awarded by CSIR, India
- Swarnajayanthi Fellowship, 2006, awarded by DST, India.
- Scopus Young Scientist, 2006, awarded by Elsevier.
- Ranked by Essential Science Indicators (ESI of ISI Web of Science) as among the top 1% of all scientists in the world for 10000 citations

Awards & Honors


Publications

Publications:

1. Swetha, J.; Eswar, N. K.; Singh, S.; Chatterjee, K.; Sood, A.; Madras, G. Macroporous three-dimensional graphene oxide foams for dye adsorption and antibacterial applications. RSC Advances 2016, 6, (1), 1231 - 1242.

2. Singh, S. A.; Madras, G., Sonochemical synthesis of Pt, Ru doped TiO 2 for methane reforming. Applied Catalysis A: General 2016, 518, 102-114.

3.Sharma, M.; Srinivas, V.; Madras, G.; Bose, S., Outstanding dielectric constant and piezoelectric coefficient in electrospun nanofiber mats of PVDF containing silver decorated multiwall carbon nanotubes: assessing through piezoresponse force microscopy. RSC Advances 2016, 6, (8), 6251-6258.

4. Natarajan, J.; Madras, G.; Chatterjee, K., Maltitol-based biodegradable polyesters with tailored degradation and controlled release for bone regeneration. RSC Advances 2016, 6, (46), 40539-40551.

5. Mandapaka, R.; Madras, G., Microkinetic modelling of CO oxidation on ionic palladium substituted ceria. Industrial and Engineering Chemistry Research 2016, 55, 23-2318.

Books: None. Seven book chapters
Patents: Four filed.