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Chem Engg

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Professor

Giridhar Madras

A-505
···
PhD: Ph.D, Texas A&M University
Research Interests: Catalysis, Polymers, Supercritical fluids, Energy
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“We are interested in developing novel materials for applications in the energy and environmental sectors.”

Research Overview

The aim of the research group is to develop new nanomaterials for energy and environmental applications. We also synthesize novel polymeric materials for applications in water purification and drug delivery. We also work in the area of supercritical fluids and its synthesis for biodiesel and bio lubricants.

Research Highlights

Heterogeneous catalysis

We develop several new nanomaterials that are used as catalysts for reactions in the energy and environmental sectors. We also propose new reaction pathways and mechanisms providing us with a method to develop new materials with superior properties.

Polymers

The emphasis has been to synthesize new polymers and also functionalize them with new nanomaterials. We characterize the morphological structure, examine the molecular structure and incorporate model drugs into the matrix to investigate its evolution into media with time.

Supercritical fluids

The solubilities of various compounds have been modeled using various empirical relations developed by us. These are based on phase equilibria thermodynamics. We have also synthesized bio lubricants and biodiesel in supercritical fluids for the first time.

Distribution kinetics

We develop continuous distribution kinetic models for granular mixing, precipitation, simultaneous polymerization and degradation, crystal growth, Ostwald ripening, gelation, attrition and the Avrami equation for crystallization.

Selected Publications

In-situ decorated Ag nanoparticles over vacancy-rich FeCo2O4/g-C3N4 photocatalyst system

P P Cho; P P Mon; M Kumar; Challapalli S; Giridhar Madras

Journal: Materials Chemistry and PhysicsYear: 2025DOI: 10.1016/j.matchemphys.2025.131854

Chemical Recycling of Mixed-Color PET Waste Using a Reusable Magnetic MnOx/Fe3O4 Nanocatalyst

Swapna B; Subha P; Ramesh A; Sudarsanam P; Giridhar Madras

Journal: ACS Applied Nano MaterialsYear: 2025DOI: 10.1021/acsanm.5c04216

Nano-cubic SrTiO3 on poly(heptazine imide) composite for enhanced photodegradation efficiency

P P Cho; P P Mon; M Kumar; S Masimukku; Challapalli S; Giridhar Madras

Journal: RSC Applied InterfacesYear: 2025DOI: 10.1039/D5LF00120J

Industrial waste-derived biochar composites for removal of water-borne 4-nitrophenol: cost-effectiveness and sustainability

H S Rangappa; P P Mon; B Jayaraman; C Lin; Challapalli S; Giridhar Madras

Journal: Environmental Science and Pollution ResearchYear: 2025DOI: 10.1007/s11356-025-36992-2

Solution Combustion Synthesized Ni-Based Catalysts for Dry Reforming of Methane Using Dielectric Barrier Discharge Reactor

Nitin Bala S M; Rao M U; Subrahmanyam C; Giridhar Madras

Journal: ChemCatChemYear: 2025DOI: 10.1002/cctc.202500048

Robust dehydrofluorination of HFC-245fa to HFO-1234ze via in situ VOFx formation over V2O5/γ–Al2O3 catalyst

Fatima F; Rao M U; Chang-Chien G P; Satyanarayana G; Challapalli S; Giridhar Madras

Journal: Nanoscale HorizonsYear: 2025DOI: 10.1039/D5NH00366K

Morphology-tuned MnOx/TiO2 nanocatalysts for recycling PET plastic waste with biomass-derived ethylene glycol

Bhattu Swapna; Madam Bobby Barnabas; Pragya Moni Gogoi; Pankaj Bharali; Giridhar Madras; Putla Sudarsanam

Journal: NanoscaleYear: 2025DOI: 10.1039/D4NR05373G

Visible light-induced degradation of tetracycline using CaFe2O4/CuWO4 composite and its mechanistic insights

Harsha S Rangappa; Phyu Phyu Cho; Preetam Dash; Bhagatram Meena; Partha Ghosal; Chuxia Lin; Giridhar Madras; Ch Subrahmanyam

Journal: Surfaces and InterfacesYear: 2025DOI: 10.1016/j.surfin.2025.106160

Rational BiMoO nanospheres decorated g-C3N4 for photocatalytic performance of dye degradation

Phyu Phyu Cho; Phyu Phyu Mon; Mohit Kumar; Giridhar Madras; Ch Subrahmanyam

Journal: Surfaces and InterfacesYear: 2024DOI: 10.1016/j.surfin.2024.104522

Highly Porous Multiwalled Carbon Nanotube-Foam Composite for Batch Adsorption Performances of Dyes

Phyu Phyu Mon; Phyu Phyu Cho; Harsha S Rangappa; Saiyam Dobhal; Partha Ghosal; Giridhar Madras; Subrahmanyam Ch

Journal: The Journal of Physical Chemistry BYear: 2024DOI: 10.1021/acs.jpcb.4c03228