Dr. Rajavaram Ramaraghavulu Assistant Professor

Specialization

Super capacitors, Electro catalyst, Dielectrics, Ferroelectrics, Photoluminescence, nanomaterials, Microwave sintering of materials and synthesis and Rare earth ions doped glasses for photoluminescence.

Qualification

Ph.D. in Physics, 2014, M.Sc. in Physics, 2007

Passing Year

2014

Teaching Experience

12 years

Teaching experience: 5 years

Research experience: 12 years

Awards & Recognition

• Junior Research Fellowship: U.G.C. BSR Meritorious Students in Science (2012–2014), from UGC-New Delhi.
• Senior Research Fellowship: U.G.C. BSR Meritorious Students in Science (2014), from UGC-New Delhi.
• Best Poster Presentation: From The Korean Microgravity Society for the poster presented on ‘Effect of Al₂O₃ concentration on density and structure of (CaO-SiO₂)-xAl₂O₃ slag’, 2017, KIST, Seoul, South Korea.

International Visits

• Research Professor — Prof. Joonho Lee research group working on various projects for POSCO, Department of Materials Science and Engineering, Korea University, Seoul, South Korea.

• March 2019 – June 2019 — The Institute of High Technology Materials and Devices, Center for Creative Materials and Components.

• March 2016 – February 2016 — The Institute of High Technology Materials and Devices, Center for Creative Materials and Components.

• March 2015 – February 2016 — Department of Materials Science and Engineering.

• December 2014 – February 2015 — Research Institute of Engineering and Technology.

Publications In Refereed Journals

Key Publications (Only Q1 & Q2 rated)

• Synergistic Oxygen-Potassium Co-Doping of g-C₃N₄ Yields Noble-Metal-Free Photocatalyst with Boosted Solar-Driven Hydrogen Evolution Yumei Li; Gang Xu; Rajavaram Ramaraghavulu; S.V. Prabhakar Vattikuti; Nam Nguyen Dang; Jaesool ShimJournal of Alloys and Compounds

• Role of Eu³⁺ concentrationonphotoluminescenceandelectrochemical studies of Bi2Cr₄O₁₅ nanoparticles.Roopa K.N, Y.S. Vidya, H.C. Manjunatha, Rajavaram Ramaraghavulua, R. Munirathnam, S. Manjunatha, Vishwalinga Prasad B., M. Shivanna, Bhanupriya H.Materials Science & Engineering B 322 (2025) 118540.https://doi.org/10.1016/j.mseb.2025.118540

• Cu particles reinforced Sn58Bi filler for soldering SiC to Cu at a temperature below 200℃ Yu Zhao, Yiteng Zhou, Rajavaram Ramaraghavulu, Gang WangJournal of Material Science 60 (2025) 10898–10910.https://doi.org/10.1007/s10853-025-11088-x

• 50. Recent Breakthroughs in Through-Space Charge Transfer in π-Stacked Molecules as Thermally Activated Delayed Fluorescent Emitters for OLED Applications K Madhusudhan Rao, Ramaraghavulu Rajavaram, Deepti Kolli, SV Prabhakar Vattikuti, Mallesham Godumala Journal of Materials Chemistry C 13 (2025) 3091-3122https://doi.org/10.1039/D4TC05181E

• 2024

• Tailoring the composition of a non-noble, Cubic Shaped MnSn (OH) 6 Bi-functional electrocatalysts for methanol and urea oxidation reactions in alkaline solutions PC Nagajyothi, Clement Okraku Tettey, R Ramaraghavulu, A Bhargav, Masoom Raza Siddiqui, GR Dillip, Jaesool Shim Surfaces and Interfaces 51 (2024) 104712.https://doi.org/10.1016/j.surfin.2024.104712

• Effect of Sm³⁺ concentration on reddish orange photoluminescence and electrochemical properties of copper aluminate nanoparticles for display and supercapacitor applications NR Srinath, HC Manjunatha, YS Vidya, Rajavaram Ramaraghavulu, SM Rumana Farheen, R Munirathnam, KN Sridhar, S Manjunatha, M Shivanna, Suman Kumar Microchemical Journal 205 (2024) 111151.https://doi.org/10.1016/j.microc.2024.111151

• Electrochemical and photoluminescence properties of Ce3+ doped copper aluminate nanoparticles NR Srinath, HC Manjunatha, YS Vidya, Rajavaram Ramaraghavulu, R Munirathnam, KN Sridhar, S Manjunatha, M Shivanna, Suman KumarChemical Physics Impact 9 (2024) 100707.https://doi.org/10.1016/j.chphi.2024.100707

• Effect of annealing on the MnO2 cathodes for high-performance aqueous Zn-ion batteries Adesh Prasad, R Ramaraghavulu, Mohammad Asif, GR Dillip, J Shim, PC NagajyothiCeramics International 50(24) (2004) 55628-55638.https://doi.org/10.1016/j.ceramint.2024.10.426

• Scintillation Performance of Mn(II)-doped Cs₂NaBiCl₆ Double Perovskite Nanocrystals for X-ray imaging applications Varnakavi Naresh, R. Ramaraghavulu, Kiran Gupta, Pil-Ryung Cha, and Nohyun LeeAdvanced Oprical Materials 16 (15) (2024) 19068-19080.https://doi.org/10.1002/adom.202301868

• 44. Microwave synthesis of NiMn₂O₄/Ni-foam: Efficient bifunctional electrocatalysts for overall water splitting PC Nagajyothi, K Pavani, R Ramaraghavulu, Jaesool ShimInternational Journal of Hydrogen Energy 54 (2024) 691-699.https://doi.org/10.1016/j.ijhydene.2023.09.046

• Time-dependent structural tuning of in-situ-grown MnCo2O4 nanostructures on Ni-foam for efficient overall water splitting Nagajyothi, PC; Pavani, K; Ramaraghavulu, R; Shim, Jaesool Inorganic Chemistry Communications 160 (2024) 111939.https://doi.org/10.1016/j.inoche.2023.111939

• Surfactant-assisted hydrothermal synthesis and photocatalytic activity of Ag₃PO₄Nagajyothi, PC; Pavani, K; Ramaraghavulu, R; Shim, Jaesool Materials Letters 355 (2024) 135440. https://doi.org/10.1016/j.matlet.2023.135440

• Surfactant-assisted hydrothermal synthesis and photocatalytic activity of Ag₃PO₄ — P.C. Nagajyothi, K. Pavani, R. Ramaraghavulu, Jaesool Shim. Materials Letters 355 (2023) 135440. https://doi.org/10.1016/j.matlet.2023.135440

• Flower like Ni doped BiVO₄ composite with efficient visible light photocatalytic performance for the removal of Naproxen: A detailed mechanism and DFT study — Nagarajaiah Honnappa Pooja Mohan, Kavya Kalidasan, Srinivas Mallapur, Rajavaram Ramaraghavulu, Prashanth Vishwa, Sakthivel Kandaiah. Hybrid Advances 4 (2023) 100102. https://doi.org/10.1016/j.hybadv.2023.100102

• Enriched photocatalytic and photoelectrochemical activities of a 2D/0D g-C₃N₄/CeO₂ nanostructure — Ramaraghavulu Rajavaram, S. V. Prabhakar Vattikuti, Jaesool Shim, Xinghui Liu, Nguyen To Hoai and Nam Nguyen Dang. Nanoscale Advances 5(23) (2023) 6489-6500. https://doi.org/10.1039/D3NA00774J

• Ce-MOF-derived CeO₂-GO as an efficient non-precious electrocatalyst for the oxygen evolution — P. C. Nagajyothi, K. Pavani, R. Ramaraghavulu, Jaesool Shim. Inorganics 11(4) (2023) 161. https://doi.org/10.3390/inorganics11040161

• Pouch-Type Asymmetric Supercapacitor Based on Nickel-Cobalt Metal-Organic Framework — Surya V Prabhakar Vattikuti, Jie Zeng, Rajavaram Ramaraghavulu, Nguyen To Hoai, Nam Nguyen Dang, Jaesool Shim, Christian M Julien. Materials 16 (6) (2023) 2423. https://doi.org/10.3390/ma16062423

• Excitation-dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co-doped multi-component borophosphate glasses — R. Ramaraghavulua, K. Pavani, P.C. Nagajyothi, Jaesool Shim — Journal of the American Ceramic Society 106 (6) (2023) 3509–3524 — https://doi.org/10.1111/jace.19028

• Catalytic reduction of methylene blue and rhodamine B using Ce-MOF-derived CeO₂ catalyst. P.C. Nagajyothi, R. Ramaraghavulu, K. Pavani, Jaesool Shim. Materials Letters 336 (2023) 133837. https://doi.org/10.1016/j.matlet.2023.133837

• High-Throughput Strategies for the Design, Discovery, and Analysis of Bismuth-Based Photocatalysts — Surya V. Prabhakar Vattikuti, Jie Zeng, Rajavaram Ramaraghavulu, Jaesool Shim, Alain Mauger, Cristian M. Julien. International Journal of Molecular Sciences 24 (2023) 663. https://doi.org/10.3390/ijms24010663

• Microwave synthesis: CuCo₂O₄/CuO as efficient electrocatalysts for the oxygen evolution reaction — P.C. Nagajyothi, R. Ramaraghavulu, Jaesool Shim — Materials Letters 331 (2023) 133449 — https://doi.org/10.1016/j.matlet.2022.133449

• Facile One-Pot Decoration of SnO₂ Quantum Dots on the Surface of the Iron Phosphate Nanosheets for Enhanced Catalytic Decolorization of Methylene Blue Dye in the Presence of NaBH₄. TVM Sreekanth, R Ramaraghavulu, K Yoo, J Kim. Journal of Cluster Science 33 (2) (2022) 835-838. https://doi.org/10.1007/s10876-021-02006-7

• An inexpensive Ni-doped Co₃O₄ electrocatalyst for urea oxidation — PC Nagajyothi, R Ramaraghavulu, K Yoo, K Pavani, J Shim. Colloids and Surfaces A: Physicochemical and Engineering Aspects 635 (2022) 128101. https://doi.org/10.1016/j.colsurfa.2021.128101

• Hydrothermal Synthesis of MnWO₄@GO Composite as Non-Precious Electrocatalyst for Urea Oxidation — PC Nagajyothi, K Yoo, R Ramaraghavulu, J Shim — Nanomaterials 12 (1) (2022) 85 — https://doi.org/10.3390/nano12010085

• In Situ Synthesis of β-Na_1.5Y_1.5F₆: Er³⁺ Crystals in Oxyfluoride Silicate Glass for Temperature Sensors and Their Spectral Conversion and Optical Thermometry Analysis. R Dagupati, R Klement, R Rajavaram, JJ Velázquez, D Galusek. Molecules 26 (22) (2021) 6901. https://doi.org/10.3390/molecules26226901

• One-pot hydrothermal synthesis: Enhanced MOR and OER performance using low-cost Mn₃O₄ electrocatalyst — PC Nagajyothi, R Ramaraghavulu, K Munirathnam, K Yoo, J Shim. International Journal of Hydrogen Energy 46 (27) (2021) 13946-13951. https://doi.org/10.1016/j.ijhydene.2020.11.147

• Synthesis and photoluminescent characteristics of Sm³⁺-doped Ba₃(PO₄)₂ phosphor hierarchical architectures — Chandra Babu Ballipalli, Ramaraghavulu Rajavaram, V Naresh, Dayakar Thatikayala, Dohyun Kim, Dong Su Shin, Andrew P Baker, Gui-Gen Wang, Jinsub Park — Materials Science and Engineering: B 264 (2021) 114979 — https://doi.org/10.1016/j.mseb.2020.114979

• Green synthesized AgNPs decorated on Ketjen black for enhanced catalytic dye degradation. Rajavaram Ramaraghavulu, V Koteswara Rao, KC Devarayapalli, Kisoo Yoo, PC Nagajyothi, Jaesool Shim. Research on Chemical Intermediates 47 (2) (2021) 637-648. https://doi.org/10.1007/s11164-020-04290-w

• Effects of Basicity and Al₂O₃ Content on the Chemistry of Phases in Iron Ore Sinter Containing ZnO — J Park, R Rajavaram, IK Suh, J Jeon, S Son, J Lee. Metallurgical and Materials Transactions B 51 (6) (2020), 3016-3027. https://doi.org/10.1007/s11663-020-01940-7

• Synthesis and optimization of Dy-doped SrZr₄(PO₄)₆ nanophosphors for plant growth light-emitting diodes — K Munirathnam, R Rajavaram, PC Nagajyothi, S Thiyagaraj, M Srinivas. Solid State Sciences 109 (2020) 106455. https://doi.org/10.1016/j.solidstatesciences.2020.106455

• Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo₂O₄ microstructures for energy storage devices — RR Gutturu, S TVM, R Rajavaram, DPR Borelli, D GR, N PC — International Journal of Energy Research 44 (14), 11233-11247 — https://doi.org/10.1002/er.5719

• Mechanistic investigation of defect-engineered, non-stoichiometric, and Morphology-regulated hierarchical rhombus-/spindle-/peanut-like ZnCo₂O₄ microstructures and their applications toward high-performance supercapacitors — G Rajasekhara Reddy, GR Dillip, TVM Sreekanth, Ramaraghavulu Rajavaram, B Deva Prasad Raju, PC Nagajyothi, J Shim — Applied Surface Science 529 (2020) 147123 — https://doi.org/10.1016/j.apsusc.2020.147123

• In situ engineered 0D interconnected network-like CNS decorated on Co-rich ZnCo₂O₄ 2D nanosheets for high-performance supercapacitors. G Rajasekhara Reddy, GR Dillip, TVM Sreekanth, Ramaraghavulu Rajavaram, B Deva Prasad Raju, PC Nagajyothi, J Shim. Journal of the Taiwan Institute of Chemical Engineers 113 (2020) 155-164. https://doi.org/10.1016/j.jtice.2020.08.002

• Synthesis of crystalline zinc hydroxystannate and its thermally driven amorphization and recrystallization into zinc orthostannate and their phase-dependent cytotoxicity evaluation. Gowra Raghupathy Dillip, Patnamsetty Chidanandha Nagajyothi, Rajavaram Ramaraghavulu, Arghya Narayan Banerjee, Bandugula Venkata Reddy, Sang Woo Joo. Materials Chemistry and Physics 248 (2020) 122946. https://doi.org/10.1016/j.matchemphys.2020.122946

• Energy transfer induced enhancement in NIR luminescence characteristics of Yb³⁺/Er³⁺ co-doped sodium zinc bismuth fluorophosphate glasses — CP Reddy, R Ramaraghavulu, T Kalpana, J Gajendiran. Optical Materials 100 (2020) 109616. https://doi.org/10.1016/j.optmat.2019.109616

• Microwave synthesis: ZnCo₂O₄ NPs as an efficient electrocatalyst in the methanol oxidation reaction — T.V.M. Sreekanth, R. Ramaraghavulu, S.V. Prabhakar Vattikuti, Jaesool Shim, K. Yoo. Materials Letters 253 (2019) 450-453. https://doi.org/10.1016/j.matlet.2019.07.120

• Bridging between the physical properties: structure and density of CaO-SiO₂-Al₂O₃ melts at CaO/SiO₂ = 1.3 and different mole% of Al₂O₃ — Ramaraghavulu Rajavaram, Hyelim Kim, Junwoo Park, Chi-Hoon Lee, Won-Seung Cho, Joonho Lee. Ceramics International 45 (2019) 19409-19414. https://doi.org/10.1016/j.ceramint.2019.06.194

• Photocatalytic dye degradation and hydrogen production activity of Ag₃PO₄/g-C₃N₄ nanocatalyst — Sreekanth TVM, Kisoo Yoo, Ramaraghavulu Rajavaram, SV Prabhakar Vattikuti, Jaesool Shim, Nagajyothi PC — Journal of Materials Science and Materials in Electronics 30 (2019) 14890–14901 — https://doi.org/10.1007/s10854-019-01860-6

• Structural evolution induced by substitution of designated molybdate sites (MoO₄⁻²) with different anionic groups (BO₃⁻³, PO₄⁻³ and SO₄⁻²) in CaMoO₄:Sm³⁺ phosphors - A study on color tunable luminescent properties — A. Balakrishna, H.C. Swart, R. Ramaraghavulu, A.K. Bedyal, R.E. Kroon and O.M. Ntwaeaborwa — Journal of Alloys and Compounds 727 (2017) 224-237 — https://doi.org/10.1016/j.jallcom.2017.08.117

• Defect induced ferromagnetism in h-BaTiO₃ synthesized from t-BaTiO₃ by microwave irradiation — Ramaraghavulu Rajavaram, Junwoo Park and Joonho Lee — Journal of Alloys and Compounds 712 (2017) 627-632 — https://doi.org/10.1016/j.jallcom.2017.04.150

• Effect of Al₂O₃ concentration on density and structure of (CaO-SiO₂)-xAl₂O₃ slag. Ramaraghavulu Rajavaram, Hyelim Kim, Chi-Hoon Lee, Won-Seung Cho and Chi-Hwan Lee. Metallurgical and Materials Transactions B, 48 (2017) 1595-1601. https://doi.org/10.1007/s11663-017-0964-2

• Photoluminescence properties of LiTi_2-xEu_x(PO₄)₃ phosphor. R. Ramaraghavulua, V. Naresh and V. Eswaraiah. Luminescence, 32 (2017) 11-16.

• Microwave heating characteristics of magnetite ore. Ramaraghavulu Rajavaram, Jaehong Lee, Jihye Han, Joon Seok Oh, Han Gyeol Kim, Hyelim Kim and Joonho Lee. Metals and Materials International 22 (2016) 1116-1120. https://doi.org/10.1007/s12540-016-6045-2 https://doi.org/10.1002/bio.3141

• Energy transfer based emission analysis of (Tb³⁺, Sm³⁺): Lithium zinc phosphate glasses — C Parthasaradhi Reddy, V Naresh, R Ramaraghavulu, BH Rudramadevi, KT Ramakrishna Reddy, S Buddhudu. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 144 (2015) 68-75. https://doi.org/10.1016/j.saa.2015.02.090

• Optical and Dielectric Properties of Cr³⁺ & Cu²⁺: P₂O₅-ZnO-LiF Glasses — C. Parthasaradhi Reddy, V. Naresh, R. Ramaraghavulu, B.H. Rudramadevi and S. Buddhudu. Int. Journal of Engineering Research and Applications 5 (2014) 127-134.

• Preparation and Characterization of Ti³⁺ & Cr³⁺: Li₂O-LiF-B₂O₃-ZnO Optical Glasses — L. Vijayalakshmi, V. Naresh, R. Ramaraghavulu, B.H. Rudramadevi and S. Buddhudu. Int. Journal of Engineering Research and Applications 6 (2014) 168-176.

• Spectral Analysis of Sm³⁺ & Dy³⁺: B₂O₃-ZnO-MgO Optical Glasses — M Venkateswarlu, V Naresh, R Ramaraghavulu, BH Rudramadevi, S Buddhudu. Int. Journal of Engineering Research and Applications 4 (2014) 103-113.

• Structural and dielectric properties of BaBi₂Nb₂O₉ ceramics — R. Ramaraghavulu and S. Buddhudu — AIP Conference Proceedings 1591 (2014) 1702-1704 — https://doi.org/10.1063/1.4873083

• Structural and dielectric properties of BaBi₂Nb₂O₉ ferroelectric ceramic powders by a solid state reaction method — R. Ramaraghavulu and S. Buddhudu — Ferroelectrics 460 (2014) 57-67 — https://doi.org/10.1080/00150193.2014.874924

• Structural and dielectric properties of LiV₃O₈ ceramic powders — R. Ramaraghavulu, K. Sivaiah and S. Buddhudu — Ferroelectrics 432 (2012) 55-64 — https://doi.org/10.1080/00150193.2012.707843

• Structural and emission characterization of RE³⁺ (=Eu³⁺, Sm³⁺ & Pr³⁺) doped BiNbO₄ ceramic powders. K. Srinivasa Rao, R. Ramaraghavulu and S. Buddhudu. Proceedings of the Indian National Science Academy 77 (2011) 305-313.

• Analysis of structural, thermal and dielectric properties of LiTi₂(PO₄)₃ ceramic powders. R. Ramaraghavulu and S. Buddhudu. Ceramics International 37 (2011) 3651-3656. https://doi.org/10.1016/j.ceramint.2011.06.025

• Analysis of structural and thermal properties of Li₂TiO₃ ceramic powders. R. Ramaraghavulu, S. Buddhudu and G. Bhaskar Kumar. Ceramics International 37 (2011) 1245-1249. https://doi.org/10.1016/j.ceramint.2010.12.007