Enhanced Photocatalytic and Non-Linear Optical Properties of Dual-Doped Rare Earth Ions (Gd3 +and Sm3 +) in ZnO Nanostructured Materials Umadevi P, Naveenkumar N, Sabari Girisun Chidambaram, Ramesh Vadivel ACS Applied Nano Materials, 2025 ZnO nanostructures have garnered substantial interest due to their multifunctional characteristics. In this work, pristine ZnO and rare-earth (RE)-doped ZnO nanostructures incorporating Gd3 + and Sm3 + metal ions at concentrations of 0.002%, 0.004%, and 0.006% were synthesized using a hydrothermal method. The influence of RE ion doping on the structural, optical, morphological, and surface characteristics was investigated through PXRD, UV–vis spectroscopy, HR-SEM, HRTEM, XPS, and BET analyses. PXRD confirmed the presence of the hexagonal wurtzite phase, with crystallite sizes ranging from 24 to 28 nm. A slight redshift in the bandgap (3.20–3.23 eV) was observed in the doped samples compared to bulk ZnO. Morphological studies revealed nanoflake structures for undoped ZnO, while doped samples exhibited a combination of flakes and rod-like morphologies. The photocatalytic performance was evaluated through the degradation of Reactive Black 5 (RB5) dye under UV light. The 0.002 wt.% doped sample demonstrated the highest degradation efficiency of 94.56% within 70 min, with all samples following pseudo-first-order kinetics. Magnetic measurements showed weak ferromagnetism in all samples, attributed to RE ion-induced lattice defects. Nonlinear optical properties were assessed using the open-aperture Z-scan technique with a Q-switched Nd:YAG laser (532 nm). The pristine ZnO sample exhibited the highest nonlinear absorption coefficient (β) and the lowest optical limiting threshold (OLT), suggesting its suitability for photonic limiter applications. These results underscore the potential of dual RE-ion-doped ZnO nanomaterials for applications in photocatalysis, environmental remediation, and nonlinear optical devices.
High-Powered Nanostructured rGO/g-C3N4/CoSe||AC Electrodes Employed in an Asymmetric Supercapacitor Device Premanand Ganesan, Sridevi D, Manojkumar Moorthy, Suresh Perumal, Silambarasan S, Thandavarayan Maiyalagan, Tushar H. Rana, Arun Prakash Periasamy, Ramesh V Energy Storage, 2025 Supercapacitors are increasingly adopting two‐dimensional (2D) carbon‐intercalated transition metal chalcogenide (TMC) composites (CxMX1−x) due to their adjustable surface properties, makeup, and structure. Even though they show promise, we still do not know much about how the strain in the structure and changes in electronic properties from 2D carbon intercalation affect them. In this study, we prepared (rGO/g‐C3N4)x‐(CoSe)1−x nanocomposites using a new one‐step hydrothermal method with very low (x = 0.01) and higher (x = 0.10) amounts of carbon to see how they affect lattice strain and electrochemical performance. The results of XRD and Rietveld refinement demonstrated the purity of the materials and revealed an increase in lattice size with the addition of more rGO/g‐C3N4. Crystallite size decreased from 12.97 nm for CoSe to 9.5 nm for the (rGO/g‐C3N4)0.1‐(CoSe)0.90 sample due to strain introduced by carbon intercalation. TEM analysis showed nanosheet morphologies with visible rGO and g‐C3N4 structures. XPS confirmed the Co2+ and Se2− oxidation states and validated the presence of C–C and C–N bonds. The (rGO/g‐C3N4)0.1‐(CoSe)0.90 electrode exhibited a high specific capacitance of 1102 F g−1 at 1 A g−1 and retained 97.1% after 2000 cycles. An asymmetric device using activated carbon (AC) achieved an energy density of 53.31 Wh kg−1, a power density of 750 W kg−1, and 97% capacitance retention after 5000 cycles, underscoring the material's potential for durable, high‐performance.
Growth, structural, linear and non linear optical limiting properties of a novel barium (II) bis benzo (15‑crown‑5 ether) manganese (II) thiocyanate (BBCMT) single crystal BG S. Sengottaiyan, V. Ramesh, V. Ravisankar, T. C. Sabari Girisun J Mater Sci: Mater Electron (2026) 37:506 37 (506), 1-2 , 2026 2026
High‐Powered Nanostructured rGO/g‐C 3 N 4 /CoSe||AC Electrodes Employed in an Asymmetric Supercapacitor Device P Ganesan, M Moorthy, S Perumal, S S, T Maiyalagan, TH Rana, ... Energy Storage 7 (6), e70257 , 2025 2025 Citations: 1
Enhanced Photocatalytic and Non-Linear Optical Properties of DualDoped Rare Earth Ions (Gd3 + and Sm3 +) in ZnO Nanostructured Materials RV Umadevi P, Naveenkumar N, Sabari Girisun Chidambaram ACS Applied Nano Materials , 2025 2025 Citations: 2
Improved photovoltaic efficiency and nonlinear optical response in Ni-doped Bi2O3 nanorod-based photoanodes for dye-sensitized solar cells N Naveenkumar, A Abhishek, P Umadevi, B Neppolian, SK Mukaddar, ... Ceramics International , 2025 2025 Citations: 3
Investigation of the growth, structural, and physicochemical properties of bis (15-crown-5-k5O) strontium tetrakis (isothiocyanato-kN) cobalt (II) single crystal for NLO and … S Sengottaiyan, V Ramesh, V Ravisankar, TCS Girisun, B Gunasekaran Journal of Materials Science: Materials in Electronics 36 (11), 679 , 2025 2025 Citations: 1
Electrochemical properties of Zn and Al-doped SnSb for asymmetric supercapacitor application A Abhishek, N Naveenkumar, V Ramesh Electrochimica Acta 509, 145314 , 2025 2025 Citations: 2
Dual Eu3+ and Er3+ doping in ZnO nanoporous 2D frameworks for tuning photocatalytic activity, linear and non-linear optical response P Umadevi, DV Sridevi, N Naveenkumar, M Abith, TCS Grisun, V Ramesh Journal of Alloys and Compounds 1008, 176683 , 2024 2024 Citations: 11
Thermoelectric, mechanical and electrochemical properties of pure single-phase FeSb A Abhishek, TH Rana, R Parasuraman, S Perumal, V Ramesh Ceramics International 50 (15), 26760-26769 , 2024 2024 Citations: 2
GO/rGO doped metal chalcogenide (CoSe, NiSe, and MnSe) nanocomposites for symmetric and asymmetric supercapacitors for energy storage applications V Ramesh Materials Research Foundations 170 , 2024 2024
Structural, vibrational and electrochemical studies of bulk and nano SnSb for supercapacitor application A Abhishek, V Ramesh Journal of Alloys and Compounds 969, 172293 , 2023 2023 Citations: 11
Size-dependent structural, morphological, optical, and electrical studies of hydrothermally synthesized TiO 2 nanocorals for DSSC application N Naveenkumar, A Abhishek, DV Sridevi, M Balu, B Neppolian, ... Journal of Materials Science: Materials in Electronics 34 (32), 2137 , 2023 2023 Citations: 5
Centrosymmetric structure of novel barium (II)-dibenzo-15-crown-5-ether-zinc (II)-tetra-thiocyanate single crystal for nonlinear optical application TK V. Ravisankar, V. Ramesh, B. Gunasekaran, Suresh Perumal, P. Karuppasasmy Optical and Quantum Electronics 55 (953), Article number: 953 (2023) , 2023 2023 Citations: 2
A Novel Approach to IoT-Based Solar Energy Measurement and Monitoring Model SP Sivanand , Tavanam Venkata Rao , V. Ramesh, D.V. Sridevi, Mukuloth ... European Chemical Bulletin 12 (Special Issue 4), 15777-15794 , 2023 2023 Citations: 2
New hybrid semiconducting CdSe and Fe doped CdSe quantum dots based electrochemical capacitors G Premanand, DV Sridevi, S Perumal, T Maiyalagan, JD Rodney, ... Materials Science and Engineering: B 286, 116015 , 2022 2022 Citations: 13
Growth, optical, mechanical, dielectric properties of UV-nonlinear optical single-crystal of [(NH4)(Cd (NCS) 3)]· C12H24O6 P Ilayaraja, V Ramesh, S Perumal, DV Sridevi, JM Laskar, K Rajarajan, ... Materials Science and Engineering: B 286, 116053 , 2022 2022 Citations: 4
Structural, morphological, optical, photocatalytic activity and bacterial growth inhibition of Nd-doped TiO2 nanoparticles P Umadevi, KTR Devi, DV Sridevi, S Perumal, V Ramesh Materials Science and Engineering: B 286, 116018 , 2022 2022 Citations: 30
A facile synthesis of Mn-doped ZnSe nanoparticles for an enhanced photocatalytic activity and biological applications DV Sridevi, R Vadivel, S Perumal, E Sundaravadivel, V Sivaramakrishnan Ceramics International 48 (19), 29394-29402 , 2022 2022 Citations: 29
Synthesis, growth, structural, physicochemical, linear, and nonlinear optical properties of new hybrid [2(C10H20O5) Ba] [Co (SCN)4] single crystal BGTCSG V. Ravisankar, V. Ramesh Journal of Materials Science: Materials in Electronics 33, 9380-9394 , 2022 2022 Citations: 12
Synthesis, growth, spectral, optical and thermal studies of phthalate strontium nitrate hydrochloric acid (PASNHCL) single crystal S Surya, S Dheenadhayalan, L Surya, V Ramesh, B Gunasekaran IOP Conference Series: Materials Science and Engineering 1219 (1), 012010 , 2022 2022
Synthesis, growth, structural, physicochemical, linear and nonlinear optical properties of new hybrid [(Ba(C 10 H 20 O 5 ) 2 )· (Mn (SCN) 4 )] single crystal V Ravisankar, V Ramesh, TCS Girisun, DV Sridevi, B Gunasekaran Applied Physics A 127 (11), 885 , 2021 2021 Citations: 14
MOST CITED SCHOLAR PUBLICATIONS
Structural, morphological, optical, photocatalytic activity and bacterial growth inhibition of Nd-doped TiO2 nanoparticles P Umadevi, KTR Devi, DV Sridevi, S Perumal, V Ramesh Materials Science and Engineering: B 286, 116018 , 2022 2022 Citations: 30
A facile synthesis of Mn-doped ZnSe nanoparticles for an enhanced photocatalytic activity and biological applications DV Sridevi, R Vadivel, S Perumal, E Sundaravadivel, V Sivaramakrishnan Ceramics International 48 (19), 29394-29402 , 2022 2022 Citations: 29
Crystal growth and characterization of a novel inorganic–organic hybrid NLO crystal: (NH 4 )[Cd(NCS) 3 ]·C 12 H 24 O 6 V Ramesh, K Rajarajan Applied Physics B 113 (1), 99-106 , 2013 2013 Citations: 28
Growth, spectroscopic and physicochemical properties of bis mercury ferric chloride tetra thiocyanate: A nonlinear optical crystal V Ramesh, AS Syed, K Jagannathan, K Rajarajan Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 108, 236-243 , 2013 2013 Citations: 19
Ultraviolet light induced dye degradation of methylene blue in the presence of photocatalytic CdSe and ZnSe nanoparticles DV Sridevi, V Ramesh, E Sundaravadivel Materials Today: Proceedings 42, 1244-1250 , 2021 2021 Citations: 18
Synthesis, growth, structural, physicochemical, linear and nonlinear optical properties of new hybrid [(Ba(C 10 H 20 O 5 ) 2 )· (Mn (SCN) 4 )] single crystal V Ravisankar, V Ramesh, TCS Girisun, DV Sridevi, B Gunasekaran Applied Physics A 127 (11), 885 , 2021 2021 Citations: 14
Growth and characterization of novel organic 3-Hydroxy Benzaldehyde-N-methyl 4 Stilbazolium Tosylate crystals for NLO applications K Jagannathan, P Umarani, V Ratchagar, V Ramesh, S Kalainathan Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 153, 735-740 , 2016 2016 Citations: 14
New hybrid semiconducting CdSe and Fe doped CdSe quantum dots based electrochemical capacitors G Premanand, DV Sridevi, S Perumal, T Maiyalagan, JD Rodney, ... Materials Science and Engineering: B 286, 116015 , 2022 2022 Citations: 13
Synthesis, growth, structural, physicochemical, linear, and nonlinear optical properties of new hybrid [2(C10H20O5) Ba] [Co (SCN)4] single crystal BGTCSG V. Ravisankar, V. Ramesh Journal of Materials Science: Materials in Electronics 33, 9380-9394 , 2022 2022 Citations: 12
Synthesis, growth, linear and nonlinear optical, electrical and surface studies of a hybrid nonlinear optical material: [Hg 3 CdCl 2 (SCN) 6 ] V Ramesh, B Gunasekaran, M Krishnamohan, K Rajarajan Materials Research Express 6 (11), 116205 , 2019 2019 Citations: 12
Dual Eu3+ and Er3+ doping in ZnO nanoporous 2D frameworks for tuning photocatalytic activity, linear and non-linear optical response P Umadevi, DV Sridevi, N Naveenkumar, M Abith, TCS Grisun, V Ramesh Journal of Alloys and Compounds 1008, 176683 , 2024 2024 Citations: 11
Structural, vibrational and electrochemical studies of bulk and nano SnSb for supercapacitor application A Abhishek, V Ramesh Journal of Alloys and Compounds 969, 172293 , 2023 2023 Citations: 11
catena-Poly [ammonium (cadmium-tri-μ-thiocyanato-κ4S: N; κ2N: S)–1, 4, 10, 13, 16-hexaoxacyclooctadecane (1/1)] V Ramesh, K Rajarajan, KS Kumar, A Subashini, M NizamMohideen Structure Reports 68 (3), m335-m336 , 2012 2012 Citations: 9
Size-dependent structural, morphological, optical, and electrical studies of hydrothermally synthesized TiO 2 nanocorals for DSSC application N Naveenkumar, A Abhishek, DV Sridevi, M Balu, B Neppolian, ... Journal of Materials Science: Materials in Electronics 34 (32), 2137 , 2023 2023 Citations: 5
Synthesis, Growth, Structural and Physicochemical Properties of a Novel Linear and Nonlinear UV-Optical Single-Crystal for Photonic Applications: [Ba(C 14 H 20 O 5 ) 2 .Co … V Ravisankar, V Ramesh, B Gunasekaran, M Krishnamohan, TCS Girisun, ... ECS Journal of Solid State Science and Technology 10 (9), 091008 , 2021 2021 Citations: 5
Polymethacrylic acid functionalised with dihydroxy benzene as an adsorbent for the removal of Malachite Green dye J Devakumar, V Ramesh, P Amaladass, R Jaya Santhi IOP Conference Series: Materials Science and Engineering 1070 (1), 012020 , 2021 2021 Citations: 5
Bis (benzo-15-crown-5-κ5O) barium tetrakis (isothiocyanato-κN) cobaltate (II) V Ravisankar, V Ramesh, M Krishnamohan, B Gunasekaran, TCS Girisun IUCrData 6 (1), x210024 , 2021 2021 Citations: 5
Synthesis, structural and optical properties of Co doped TiO2 nanocrystals by sol-gel method DVV Sridevi, V Ramesh, T Sakthivel, KV Geetha, VV Ratchagar, ... Mechanics, Materials Science & Engineering Journal 9 (1) , 2017 2017 Citations: 5
catena-Poly [[bis (thiocyanato-κN) cobalt (II)]-di-μ-thiourea-κ4S: S] K Rajarajan, K Sendil Kumar, V Ramesh, V Shihabuddeen, S Murugavel Structure Reports 68 (8), m1125-m1126 , 2012 2012 Citations: 5
Experimental investigations on the synthesis, growth and characterization of MCCTC single crystals V Ramesh, KS Kumar, A Subashini, A Shihabuddeen, K Jaganathan, ... AIP Conference Proceedings 1447 (1), 1287-1288 , 2012 2012 Citations: 5
