Electrochemical Investigation of Supercritical Fluid Synthesized Novel Heterostructure MXene/MoS2/PANI Chetana S, Manjunath Shetty, Vikas N. Thakur, Mudike Ravi, Navya Rani, Ananda Kumar C. S., Prasanna D. Shivaramu, Dinesh Rangappa, Basava Kumar K G. Journal of the Electrochemical Society, 2026 We report a supercritical fluid (SCF)-assisted synthesis of a tightly integrated MXene/MoS 2 /PANI ternary heterostructure for high-performance supercapacitor applications. The SCF route enables rapid nucleation, controlled crystallization, and intimate interfacial coupling between Ti 3 C 2 T x MXene and MoS 2 nanosheets, followed by uniform in situ polymerization of polyaniline (PANI) to construct a hierarchical conductive network. This rationally engineered architecture synergistically combines electric double-layer capacitance and pseudocapacitance while minimizing charge-transfer resistance and enhancing ion transport kinetics. The optimized composite delivers a high specific capacitance of ∼325 F g −1 along with excellent cycling durability over 10,000 cycles, exhibiting progressive capacitance activation attributed to improved electrolyte accessibility and interfacial conductivity. The study introduces a time-efficient and structurally controlled strategy for fabricating MXene-based ternary heterostructures and establishes a scalable pathway toward advanced hybrid electrode materials for next-generation energy storage systems.
MXenes as Versatile Materials for Hydrogen Technology and Multifunctional Applications Ujwal Shreenag Meda, Om Madan Raikar, Charanya Adaguru Rudregowda, Dinesh Rangappa, Navya Rani, Shravan S. Ranga, Aditi Pandey Chemistry an Asian Journal, 2025 MXenes are the carbides and nitrides of transition metals which are two dimensional in structure. High surface area, remarkable hydrophilicity, enhanced electrical conductivity, and unique surface functional groups are some of the distinguished properties of MXenes. These features make them suitable for numerous applications across domains such as sensing, biomedicine, catalysis, and electromagnetic interference shielding followed by hydrogen generation and storage at the forefront. This article encompasses the discovery, structure, fabrication routes, and varied applications of MXenes with an emphasis on electrocatalysis in hydrogen evolution reactions and storage. The article depicts diverse compositions and surface modification routes for enhancing their properties. MXene‐derived Z‐scheme photocatalysts have also been explored for their applications in degrading organic pollutants and volatile organic compounds. The article brings out various concerns such as the self‐restacking of MXenes due to van der Waals forces of attraction and their aggregation. Furthermore, it sheds light on the current status of MXenes and future development for sustainable energy technologies. Scaleup and high production costs are a few challenges that need to be addressed.
Scalable one-pot synthesis of aminated reduced graphene oxide for high-performance supercapacitor electrodes Suraj Kumar, Priyakshi Bora, Kunal Roy, Navya Rani M., Dinesh Rangappa, Dipak Sinha Iscience, 2025 Publisher of over 50 scientific journals across the life, physical, earth, and health sciences, both independently and in partnership with scientific societies including Cell, Neuron, Immunity, Current Biology, AJHG, and the Trends Journals.
Graphene–MXene van der Waals heterostructures for high-performance supercapacitors Suraj Kumar, Priyakshi Bora, Parimal Chandra Bhomick, Dinesh Rangappa, Dipak Sinha Nano Research Energy, 2025 Research on the exploration of graphene and two-dimensional (2D) materials is thriving and is anticipated to continue leading the forefront of materials science research. This growing interest in 2D nanomaterials is attributed to their distinct characteristics not present in their bulk counterparts. While various 2D nanomaterials have been developed, graphene and MXene, notably, have garnered significant global attention owing to their outstanding properties. Further, the ability to create van der Waals heterostructures has introduced a novel approach to amalgamating the advantageous features of graphene and MXene into a unified entity. These heterostructures not only overcome the inherent limitations of each material but also facilitate the realization of fascinating properties through their synergistic combination. This review discusses the evolution, recent advancements and prospects of these novel 2D materials. Additionally, we also address the challenges that must be overcome to achieve full-scale commercial adoption of this innovative class of layered materials. We also reviewed the application of graphene–MXene heterostructures for developing next-gen supercapacitor devices and outline potential directions for future research.
Magnetic photocatalytic systems Jagadeesh Babu Sriramoju, Chitrabanu C. Paramesh, Guddappa Halligudra, Dinesh Rangappa, Prasanna D. Shivaramu Photocatalytic Systems by Design Materials Mechanisms and Applications, 2021
Optical and RF transparent protective alumina thin films A. Carmel Mary Esther, N. Sridhara, Shaji V. Sebastian, Parthasarathi Bera, Chinnasamy Anandan, Singanahalli T. Aruna, Dinesh Rangappa, Anand Kumar Sharma, Arjun Dey Journal of Materials Science Materials in Electronics, 2015
Graphene-assisted evolution of truncated Zeolite: Effect on structure, morphology, porosity and supercapacitor performance T Sardar, MN Rani, K Roy, R Joshi, S Shetty, PN Manikanta, R Das, ... Microporous and Mesoporous Materials, 114208 , 2026 2026
Electrochemical Investigation of Supercritical Fluid Synthesized Novel Heterostructure MXene/MoS2/PANI S Chetana, M Shetty, VN Thakur, M Ravi, N Rani, A Kumar, ... Journal of The Electrochemical Society 173 (7), 073503 , 2026 2026
Methods and Technologies for Recycling Li-Ion Batteries D Patil, J Manjanna, V Gangaraju, D Rangappa Handbook of Energy Materials, 575-605 , 2026 2026 Citations: 1
MXene/f-MWCNT Nanocomposite Film: A Spray-deposited scalable fabrication for flexible electrochemical device MP Narayanaswamy, S Priyadarshan, K Roy, T Sardar, DM Manjesh, ... 2026
CNT and CNT-TiO 2 Coated Kapton® Sheet as Flexible Supercapacitor Electrode for Energy Storage Device M Palya Narayanaswamy, T Sardar, K Roy, N Rani Marilingaiah, A Dey, ... Transactions of the Indian Ceramic Society 85 (1), 33-44 , 2026 2026
Bio-inspired solution combustion synthesis of copper vanadate nanoparticles for lithium-ion battery anodes R Harini, TD Sunil, EV Kumar, M Navyarani, D Rangappa, G Nagaraju Journal of Materials Science: Materials in Electronics 37 (2), 108 , 2026 2026
SnO2-Coated Stainless-Steel Electrodes: A Promising Approach for Electrochemical Oxidation in Wastewater Treatment M Muniyappa, NR Marilingaiah, D Rangappa, M Shetty Journal of Water and Environmental Nanotechnology 11 (1), 45-55 , 2026 2026
Ternary Cu2ZnSnS4/MoS2/CNT-Heterostructure as a High-performance Supercapacitor Electrode Material S Chetana, M Shetty, VN Thakur, M Ravi, N Rani, CSA Kumar, ... Journal of The Electrochemical Society 172 (12), 123501 , 2025 2025 Citations: 1
Catalytic Reduction of Organic Pollutants and Anticancerous Activity of Eco-Friendly Synthesized ZnO Nanoparticles Using Dill Seed Extract G Halligudra, C C. Paramesh, A Giridasappa, C Sabbanahalli, K Roy, ... Topics in Catalysis, 1-15 , 2025 2025 Citations: 1
MXenes as versatile materials for hydrogen technology and multifunctional applications U Shreenag Meda, O Madan Raikar, C Adaguru Rudregowda, ... Chemistry–An Asian Journal 20 (9), e202401678 , 2025 2025 Citations: 20
Scalable one-pot synthesis of aminated reduced graphene oxide for high-performance supercapacitor electrodes S Kumar, P Bora, K Roy, D Rangappa, D Sinha Iscience 28 (4) , 2025 2025 Citations: 2
Graphene-MXene van der Waals heterostructures for highperformance supercapacitors S Kumar, P Bora, PC Bhomick, D Rangappa, D Sinha Nano Research Energy 4 (1), e9120148 , 2025 2025 Citations: 16
Antibacterial and Antiproliferative Effect of ZnO Nanoparticles Prepared Using Origanum marjorana Plant and Garcinia indica Fruit extracts G Halligudra, V K, NR M, D Rangappa, PD Shivaramu Journal of Inorganic and Organometallic Polymers and Materials 35 (2), 1073-1083 , 2025 2025 Citations: 7
Phase-controlled construction of copper-leaf-like 2D NiS for enhanced supercapacitor performance: A supercritical fluid approach K Roy, NR Marilingaiah, A Kumar, MP Narayanaswamy, CV Yelamaggad, ... Materials Today Communications 42, 111202 , 2025 2025 Citations: 7
Rapid and Direct Conversion of the Ti 3 AlC 2 MAX Phase to Ti 3 C 2 T x MXene Nanosheets by a Supercritical Water-Assisted Etching Process K Roy, N Rani M, MP Narayanaswamy, T Sardar, V S, D Rangappa ACS Applied Nano Materials 7 (23), 27628-27639 , 2024 2024 Citations: 7
Reduced-graphene-oxide-based thin films: an alternative coating for harsh space environments R Joshi, MP Narayanaswamy, S Sinha, A Dey, G Rastogi, D Rangappa, ... ACS Applied Materials & Interfaces 16 (50), 69690-69702 , 2024 2024 Citations: 9
Natural Kapok fiber-derived two-dimensional carbonized sheets as sustainable electrode material V Gangaraju, K Roy, T Sardar, MP Narayanaswamy, M Muniyappa, ... Carbon Trends 17, 100418 , 2024 2024 Citations: 1
Fabrication of a Two-Dimensional Heterostructured MoS 2 -RGO Nanocomposite for Enhanced Photocatalytic Hydrogen Evolution M Muniyappa, NR Marilingaiah, M Shetty, M Shastri, MP Narayanaswamy, ... ACS Applied Energy Materials 7 (23), 11103-11112 , 2024 2024 Citations: 2
Electrostatic charge mitigation by graphene-based thin films for optical solar reflectors in spacecraft R Joshi, PN Manikanta, S Sinha, A Dey, G Rastogi, D Rangappa, ... Solar Energy Materials and Solar Cells 275, 113018 , 2024 2024 Citations: 5
Enhanced Electrochemical Energy Storing Performance of gC 3 N 4 @TiO 2-x /MoS 2 Ternary Nanocomposite K Roy, N Rani M, T Sardar, R Joshi, M PN, JB Sriramoju, CV Yelamaggad, ... ACS Applied Energy Materials 7 (18), 8110-8123 , 2024 2024 Citations: 7
MOST CITED SCHOLAR PUBLICATIONS
Electrochemical heavy metal detection, photocatalytic, photoluminescence, biodiesel production and antibacterial activities of Ag–ZnO nanomaterial G Nagaraju, SA Prashanth, M Shastri, KV Yathish, C Anupama, ... Materials Research Bulletin 94, 54-63 , 2017 2017 Citations: 523
Photocatalytic degradation of rhodamine B dye using hydrothermally synthesized ZnO K Byrappa, AK Subramani, S Ananda, KML Rai, R Dinesh, M Yoshimura Bulletin of materials science 29 (5), 433-438 , 2006 2006 Citations: 424
Ultrathin Nanosheets of Li 2 MSiO 4 (M = Fe, Mn) as High-Capacity Li-Ion Battery Electrode D Rangappa, KD Murukanahally, T Tomai, A Unemoto, I Honma Nano letters 12 (3), 1146-1151 , 2012 2012 Citations: 397
Superhydrophilic Graphene-Loaded TiO 2 Thin Film for Self-Cleaning Applications S Anandan, T Narasinga Rao, M Sathish, D Rangappa, I Honma, ... ACS applied materials & interfaces 5 (1), 207-212 , 2013 2013 Citations: 278
Rapid and direct conversion of graphite crystals into high‐yielding, good‐quality graphene by supercritical fluid exfoliation D Rangappa, K Sone, M Wang, UK Gautam, D Golberg, H Itoh, M Ichihara, ... Chemistry–A European Journal 16 (22), 6488-6494 , 2010 2010 Citations: 241
A comparative study on CuFe2O4, ZnFe2O4 and NiFe2O4: morphology, impedance and photocatalytic studies K Shetty, L Renuka, HP Nagaswarupa, H Nagabhushana, ... Materials Today: Proceedings 4 (11), 11806-11815 , 2017 2017 Citations: 175
Efficient reduced graphene oxide grafted porous Fe 3 O 4 composite as a high performance anode material for Li-ion batteries S Bhuvaneswari, PM Pratheeksha, S Anandan, D Rangappa, R Gopalan, ... Physical Chemistry Chemical Physics 16 (11), 5284-5294 , 2014 2014 Citations: 148
Transparent CoAl2O4 hybrid nano pigment by organic ligand-assisted supercritical water D Rangappa, T Naka, A Kondo, M Ishii, T Kobayashi, T Adschiri Journal of the American Chemical Society 129 (36), 11061-11066 , 2007 2007 Citations: 137
Controlled synthesis of nanocrystalline Li 2 MnSiO 4 particles for high capacity cathode application in lithium-ion batteries DM Kempaiah, D Rangappa, I Honma Chemical Communications 48 (21), 2698-2700 , 2012 2012 Citations: 120
Direct preparation of 1-PSA modified graphene nanosheets by supercritical fluidic exfoliation and its electrochemical properties JH Jang, D Rangappa, YU Kwon, I Honma Journal of Materials Chemistry 21 (10), 3462-3466 , 2011 2011 Citations: 119
Photocatalytic activity of ZnO nanoparticles: synthesis via solution combustion method G Nagaraju, GC Shivaraju, G Banuprakash, D Rangappa Materials Today: Proceedings 4 (11), 11700-11705 , 2017 2017 Citations: 99
Directed growth of nanoarchitectured LiFePO4 electrode by solvothermal synthesis and their cathode properties D Rangappa, K Sone, T Kudo, I Honma Journal of Power Sources 195 (18), 6167-6171 , 2010 2010 Citations: 98
Size and shape controlled LiMnPO 4 nanocrystals by a supercritical ethanol process and their electrochemical properties D Rangappa, K Sone, Y Zhou, T Kudo, I Honma Journal of Materials Chemistry 21 (39), 15813-15818 , 2011 2011 Citations: 87
Sunlight photocatalytic performance of Mg-doped nickel ferrite synthesized by a green sol-gel route A Nadumane, K Shetty, KS Anantharaju, HP Nagaswarupa, D Rangappa, ... Journal of Science: Advanced Materials and Devices 4 (1), 89-100 , 2019 2019 Citations: 86
Effect of nano-alumina on workability, compressive strength and residual strength at elevated temperature of Cement Mortar R Gowda, H Narendra, D Rangappa, R Prabhakar Materials Today: Proceedings 4 (11), 12152-12156 , 2017 2017 Citations: 84
Rapid one-pot synthesis of LiMPO 4 (M= Fe, Mn) colloidal nanocrystals by supercritical ethanol process D Rangappa, K Sone, M Ichihara, T Kudo, I Honma Chemical communications 46 (40), 7548-7550 , 2010 2010 Citations: 83
Synthesis and organic modification of CoAl 2 O 4 nanocrystals under supercritical water conditions D Rangappa, S Ohara, T Naka, A Kondo, M Ishii, T Adschiri Journal of Materials Chemistry 17 (41), 4426-4429 , 2007 2007 Citations: 79
Silver nanoparticles synthesized using saponin extract of Simarouba glauca oil seed meal as effective, recoverable and reusable catalyst for reduction of organic dyes CC Paramesh, G Halligudra, V Gangaraju, JB Sriramoju, M Shastri, ... Results in Surfaces and Interfaces 3, 100005 , 2021 2021 Citations: 69
Highly porous, honeycomb like Ag–ZnO nanomaterials for enhanced photocatalytic and photoluminescence studies: green synthesis using Azadirachta indica gum KR Basavalingiah, S Harishkumar, Udayabhanu, G Nagaraju, ... SN Applied Sciences 1 (8), 935 , 2019 2019 Citations: 62
Bifunctional g-C3N4/carbon nanotubes/WO3 ternary nanohybrids for photocatalytic energy and environmental applications U Bharagav, NR Reddy, VNK Rao, P Ravi, M Sathish, D Rangappa, ... Chemosphere 311, 137030 , 2023 2023 Citations: 60
