SAM JOHN

Scopus Publications

Structural diversity and non-innocent behavior in NiII, CoIIand CuIcomplexes of a tetrazo-based ligand: A combined experimental, crystallographic and DFT studies
Rajeena Chennikkad, Sumayya P C, Sam John, Muraleedharan K, Shalina Begum T
Journal of Molecular Structure, 2026
FeCl3/KOH two steps activated biocarbon with hierarchical porosity and oxygen-rich for enhanced supercapacitor applications
Amadou Belal Gueye, Sam John, Martin George Thomas, Jephin K. Jose, Modou Fall, Manoj Balachandran, Sabu Thomas
Biomass and Bioenergy, 2026
Biomass waste derived from jackfruit ( Artocarpus heterophyllus ) cores is used to fabricate hierarchical porous activated carbon through chemical activation with Iron(III) chloride (FeCl 3 ) and potassium hydroxide (KOH). Jackfruit is an abundant agricultural by-product in tropical regions, including India, Bangladesh, and Sri Lanka. The activated carbon derived from jackfruit provides a sustainable, low-cost, and high-performance alternative to conventional carbon materials for supercapacitors, thereby aligning with waste valorisation strategies. The prepared carbon displays hierarchical porous structures of both micro and mesopore architectures. They are amorphous and contain functional oxygen groups, as confirmed by X-Ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared Spectroscopy (FTIR). A high surface area (1251m 2 g −1 ) was obtained via Brunauer-Emmett-Teller (BET) analysis. The electrochemical performances, via cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge (GCD) show high specific capacitance of 310 F g −1 at 0.8 A g −1 from GCD, 331 F g −1 at 10 mV s −1 from CV, and a charge transfer resistance of 0.1410 Ω cm 2 , in three electrode configuration and showing good cycling stability of 87% over 2500 cycles. These results suggest that the activated carbon offers potential application in low-cost and renewable production of carbon materials for supercapacitors applications. • Jackfruit-derived activated carbon was prepared by two steps chemical activation process using FeCl 3 /KOH. • O-doped hierarchical porous activated carbon (1251 m 2 g −1 ) was fabricated. • The two-step activated carbon exhibited a specific capacitance of 310 F g −1 at 0.8 A g −1 . • High energy (19.12 Wh·kg −1 ) and power (5296.15 W kg −1 ) densities were obtained. • Cycling stability over 2500 cycles was assessed using GCD, with 87 % of capacitance retention.
Monovalent Cation Doping in Cesium Bismuth Bromide Perovskites: Insights into Structure–Property Correlation
Fency Sunny, Sam John, Priyakumari Chakkingal Parambil, Nandakumar Kalarikkal, Subila Kurukkal Balakrishnan
Journal of Physical Chemistry C, 2026
All-inorganic halide perovskites have emerged as promising candidates for optoelectronic applications with tunable properties. Doping with monovalent alkali metals in perovskites has been proven to be effective in modulating the physical and optical properties. Herein, a lead-free layered cesium bismuth bromide, Cs 3 Bi 2 Br 9, perovskite is doped with potassium, wherein the lower dopant level transpires as a substitutional and the higher level as an interstitial dopant, and the structural, morphological, optical, and electronic modifications are systemically investigated. The structural characterization through XRD analysis specifically revealed anisotropic lattice distortion on doping with a monovalent cation, leading to a conspicuous shift in the (003) plane. The morphology was tuned from hexagonal to rectangular sheets at the optimal dopant concentration. Incorporation of the potassium dopant also reduced the bandgap and increased the photoluminescence quantum yield by 40%. The conductivity of the doped samples showed a considerable increase by 37%. DFT analysis cohesively provided the impact of potassium doping on the electronic states of Cs 3 Bi 2 Br 9, effectively raising the Fermi level and increasing the charge carrier concentration, clearly elucidating the experimental observations. The study provides an integrated view on the impact of monovalent cation doping in lead-free bismuth halide perovskites, underscoring piloted property tuning with potential applications in optoelectronic devices.
MoS2-Scaffolded CsPbBr3Hybrids: In Situ Synthesis and Interfacial Charge Transfer Dynamics
Linda Maria Varghese, Fency Sunny, Gaurav Jhaa, Sam John, Nandakumar Kalarikkal, Priyakumari Chakkingal Parambil, Subila Kurukkal Balakrishnan
Journal of Physical Chemistry C, 2026
The integration of two-dimensional transition metal dichalcogenides with halide perovskites offers a promising approach to tailoring interfacial charge transfer for optoelectronic and energy applications. MoS2-scaffolded CsPbBr3 hybrids were synthesized via in situ hot-injection, where PbBr2 directed CsPbBr3 nucleation upon Cs-oleate injection, enabling nanocrystals to grow directly on the exfoliated MoS2 layers and promoting quasi-type-II heterojunctions. Unlike physical mixing, which showed negligible interaction, in situ incorporation led to strong photoluminescence quenching and efficient charge transfer. XRD, FESEM, and TEM spectroscopy confirmed the coexistence of CsPbBr3 and MoS2 phases and embedded nanocrystals. Femtosecond transient absorption (fs-TA) spectroscopy revealed ultrafast charge transfer in the hybrids, with a fast component lifetime (τ1) decreasing from 14.77 ps in pristine CsPbBr3 to 8.50 ps in CsPbBr3@1T/2H-MoS2, corresponding to an electron transfer rate of 4.99 × 1010 s–1; notably, a slower decay component (τ2 = 47.90 ps) appeared only in the hybrids, reflecting interfacial electron relaxation and efficient carrier separation. Electrochemical studies demonstrated enhanced interfacial charge transport and low resistance, confirming effective electronic coupling. DFT calculations indicated stronger PbBr2–MoS2 interactions (−26.8 kcal/cell) than CsBr-terminated surfaces (−24.1 kcal/cell), favoring uniform nucleation and intimate interfaces. Together, these results highlight the critical role of in situ interfacial engineering in achieving high-performance CsPbBr3/MoS2 heterostructures.
Tuning the electrochemical performance of graphene via covalent surface functionalization using silane coupling agent and incorporation of acid-modified multi-walled carbon nanotube for high energy and high power supercapacitor application
Sreelakshmi Rajeevan, Sam John, Deepalekshmi Ponnamma, Soney C. George
Journal of Power Sources, 2026
Revolutionising energy storage: Acoustic modulated flame pyrolysis of sesame oil for enhanced electrocapacitive carbon NanoOnions
Savitha K.U, Jayakrishnan B, Sam John, Vinayakan R, Dhanya S, Jayaprabha K.N, Anoop Kumar S
Next Materials, 2026
This work presents a cost-effective synthesis method for Carbon Nano Onions (CNOs) by combining flame pyrolysis of sesame oil with acoustic modulation at 432 Hz. XRD and Raman spectra confirm CNO formation. The introduction of acoustic waves serves to influence flame dynamics and carbon nucleation behaviour, promoting desirable structural changes in the resulting CNOs. Structural analysis confirms that acoustic modulation enhances particle sphericity, increases homogeneity, and reduces average particle diameter to 30.54 nm. Cyclic voltametric analysis demonstrated a significant performance enhancement: the specific capacitance at a scan rate of 0.1 V increased from 158 F/g for the unmodulated sample to a remarkable 245 F/g for the acoustically modulated CNOs. Electrochemical impedance spectroscopy (EIS) further supported this, with the modulated CNOs showing a near-vertical plot in the low-frequency region. The GCD analysis shows good cycling stability with 60 % columbic efficiency. This study successfully demonstrates a sustainable and controllable route for CNO fabrication, opening new avenues for advancing robust, high-performance energy storage technologies.
Alkaline-Based Electrolytes’ Impact on MXene-Bismuth Titanate's Capacitive Behavior as an Electrode Material for Energy Storage Applications
Anna M. Abraham, Justin J. Kappen, Sreelakshmi Rajeevan, Sam John, Soney C. George
Chemistryselect, 2025
MXenes exhibit exceptional capacitive performance due to their layered structure, high electrical conductivity, and large surface area. Their surface functional groups further facilitate rapid, reversible redox reactions, thereby enhancing pseudocapacitive behavior. In this study, a composite electrode material composed of MXene and Bismuth Titanate in a 95:5 ratio (MB5) was synthesized and evaluated under three aqueous electrolytic conditions: 1 M potassium hydroxide (KOH), 1 M Na 2 SO 4 , and a mixed 1 M KOH + 1 M Na 2 SO 4 solution. Electrochemical characterization using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) revealed a hybrid charge storage mechanism involving both electric double‐layer capacitance and pseudocapacitance. Among the tested electrolytes, 1 M KOH exhibited the most favorable performance, with quasi‐rectangular CV profiles, high specific capacitance values, and low charge‐transfer resistance, indicating rapid ion transport and excellent reversibility. The mixed electrolyte showed synergistic behavior, improving ion diffusion and interfacial stability, while Na 2 SO 4 offered moderate performance with stable but lower capacitance. These results underscore the role of electrolyte composition in tuning electrochemical response and highlight the MB5 composite as a promising candidate for high‐power‐density supercapacitor applications, particularly in alkaline environments.
Therapeutic profiling of Thespesia populnea seed acetone extract: A mangrove-associated source of antioxidant, antimicrobial and cytotoxic activities
James Baben George, Neethu Cyril, Variyattel Paulose Sylas, Laigi Joseph, Bebeto G. Nair, M. S. Sreejith
Chemija, 2025
The seeds of Thespesia populnea, a mangrove-associated plant, remain understudied despite their potential bioactivity. Among various extracts, the acetone extract showed the highest polyphenol (186.13 ± 0.06 mg GAE/g) and flavonoid (475.71 ± 8.08 mg QE/g) contents. Antioxidant assays demonstrated a significant free radical scavenging activity. It exhibited strong antimicrobial effects, with inhibition zones of 16–18 mm against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and MIC values of 28 µg/mL (Candida albicans) and 51 µg/mL (Aspergillus niger). The MTT assay revealed selective cytotoxicity against MCF-7 breast cancer cells (IC50 = 76.8 ± 2.1 µg/mL) over L929 normal fibroblasts (IC50 = 286.34 ± 1.8 µg/mL). GC–MS and FTIR analyses confirmed the presence of bioactive phytochemicals responsible for these effects. This is the first comprehensive report highlighting the antioxidant, antimicrobial and anticancer potential of T. populnea seed extract, supporting its relevance as a promising natural candidate for biomedical applications.
Recent advances in biowaste-based carbon materials for electrochemical energy storage applications
Amadou Belal Gueye, Sam John, Modou Fall, Viswanathan S. Saji, Sabu Thomas
Journal of Energy Storage, 2025
Biogenic Silver and Gold Nanoparticles Capped by Thespesia populnea Metabolites: Catalytic Reduction and Antibacterial Potency
James Baben George, Neethu Cyril, Remya Radhamony, V P Sylas, Pramod Kumar N, M S Sreejith, Sam John
Chemistryselect, 2025
Green synthesis of metallic nanoparticles (MNPs) using plant resources offers a sustainable and biocompatible alternative to conventional methods. In this study, silver (AgNPs) and gold nanoparticles (AuNPs) were synthesized using aqueous seed‐kernel extract of Thespesia populnea (TPK), which acted as both reducing and stabilizing agents. The nanoparticles were characterized by UV–vis, FTIR, XRD, HRTEM, and SAED, confirming their crystalline nature. TEM revealed predominantly spherical particles with mean sizes of 11.2 ± 7.5 nm (AgNP‐TPK) and 5.2 ± 1.5 nm (AuNP‐TPK). DLS and zeta potential analyses showed stable colloids with Z‐average sizes of 23.2 ± 4.2 nm (AgNP‐TPK) and 12.4 ± 1.5 nm (AuNP‐TPK) and high negative surface charges (–34.7 and –29.8 mV, respectively). Functionally, AuNP‐TPK exhibited outstanding catalytic activity for the reduction of methyl orange and 4‐nitrophenol, following pseudo‐first‐order kinetics, while AgNP‐TPK showed strong antibacterial activity against Escherichia coli , Klebsiella pneumoniae , Pseudomonas aeruginosa , and Staphylococcus aureus . These results highlight the novelty of using TPK extract to produce highly stable, dual‐functional nanoparticles, demonstrating their promise for sustainable applications in catalysis, antimicrobial treatments, and environmental remediation.
Polymorphic titania/In2O3 composite heterojunction: A visible light-driven and Z-scheme assisted approach for boosting charge carrier dynamics and solar photocatalytic hydrogen evolution
Pujita Ningthoukhongjam, Sam John, Ranjith G. Nair
International Journal of Hydrogen Energy, 2025
Novel approach to gold ion detection in aqueous solutions using silver nanoparticles synthesized from the seed extract of mangrove associate plant Thespesia populnea
James Baben George, Neethu Cyril, Jyothi P. Ramachandran, Remya Radhamony, V.P. Sylas, Sam John
Results in Surfaces and Interfaces, 2025
Bis(pyrazolyl)methane supported Cu(II) catalysts for biomimetic catalytic oxidation reactions
S. Nakul, R. Bhagavatish, R. Anjali, Sam John, Jomon Mathew, Naveen V. Kulkarni
Inorganica Chimica Acta, 2025
Unveiling the synergy between efficient charge separation and transport in multiphasic titania-ZnO heterojunctions for enhanced solar-driven photocatalytic hydrogen evolution
Pujita Ningthoukhongjam, Anand Shankar Mallik, Sam John, Ranjith G. Nair
Journal of Alloys and Compounds, 2025
Engineering the concentration and shape of Ag nanostructures for enhanced surface plasmon assisted photocatalytic H2-evolution of rutile TiO2 under solar irradiation
Trinayana Deka, Sam John, Ranjith G. Nair
International Journal of Hydrogen Energy, 2025
Utilization of biomass from Artocarpus heterophyllus as a sustainable adsorbent for cationic dyes from water: mechanistic insights and practical applicability
Savitha E. V, Beena Mathew, Sam John
Biomass Conversion and Biorefinery, 2025
Silicic Acid/Indium Oxide Modified Pencil Graphite Electrode for the Detection and Quantification of Erythrosine B
Devu Chandran, Sreelekshmi Premchanth Jyothi, Devika Vinod, Sam John, Rejithamol Rajamani
Journal of the Electrochemical Society, 2025
Integration of Artocarpus heterophyllus peduncle adsorption and cyclic voltammetry for efficient detection and removal of Ni2+ and Cd2+ ions
Savitha E V, Saritha K M, Beena Mathew, Sam John
Separation Science and Technology Philadelphia, 2025
Sustainable ZnO NPs for a Greener Future: An Integrative Review of Emerging Frontiers in Environmental, Biomedical, and Nanoinformatics Applications
K. P. Greeshma, R. Thamiz Selvi, R. Aiswarya, S. Muthulingam, Dhanya B. Sen, Sam John
Biomedical Materials and Devices, 2025
Bioactive seed oils of mangrove associates: Phytochemical profiling, antioxidant activity and in vitro cytotoxicity studies
James Baben George, Neethu Cyril, Sam John, Sylas V. P, Laigi Joseph, Saratchandran A. Divakaran, Pramod Kumar N
Journal of Applied and Natural Science, 2025
Biosynthesis of zinc oxide nanoparticles using banana peduncle and its antimicrobial, antifungal, and photocatalytic degradation activity
Roshna Hashim, Sethulekshmi P S, Ashiq Ali K K, Sam John, Chris Mary Sam, Raji V, Shamnamol G K
Materials Research Innovations, 2025
Synthesis and characterization of novel uranyl clusters supported by bis(pyrazolyl) methane ligands: biomimetic catalytic oxidation, BSA protein interaction and cytotoxicity studies
Nakul S., Bhagavathish R., Naveen V. Kulkarni, Ajeetkumar Patil, Suresh B. Arakera, Sam John
Rsc Advances, 2024
Exploring the influence of Ag nanocube size on surface plasmon resonance assisted photocatalytic H2-production of optimized Ag loaded TiO2
Trinayana Deka, Abinash Das, Sam John, Ranjith G. Nair
International Journal of Hydrogen Energy, 2024
Corrosion inhibition of mild steel in 1 M HCl using water soluble chitosan derivative of vanillin
Sam John, Zachariah Pulluparampil Mathew, Cyril Augustine, James Baben George, Bincy Joseph, M.K. Sarath Josh
International Journal of Biological Macromolecules, 2024
A Study on Biologically Active Components in Morinda citrifolia Leaf Extract and its Anti-cancer Effect by In Vitro Analysis and In Silico Molecular Docking Method
K. P. Greeshma, R. Thamizselvi, S. Muthulingam, Sam John, Dhanya B. Sen
Journal of Natural Remedies, 2024
Fabrication of high-performance symmetric pseudocapacitor by synthesizing ionic liquid-modified graphene/MoS2 NS binary electrode
Sreelakshmi Rajeevan, Sam John, Deepalekshmi Ponnamma, Soney C. George
Journal of Energy Storage, 2023
Exploring the Corrosion Inhibition Efficacy of Epoxy Merged Silver Nanoparticle Synthesized Using Garcinia gummi-gutta Leaf Extract Against Mild Steel in an Acidic Medium
G. K. Shamnamol, Sam John, Jaya Mary Jacob
Journal of Bio and Tribo Corrosion, 2023
Insight on the corrosion inhibition of nanocomposite chitosan/boron nitride integrated epoxy coating system against mild steel
Zachariah Pulluparampil Mathew, G.K. Shamnamol, K.P. Greeshma, Sam John
Corrosion Communications, 2023
Assessment of the mild steel corrosion inhibition competence of Garcinia gummi-gutta leaf extract: Evaluation by XPS, thermodynamic, and kinetic parameters
G K Shamnamol, Sam John, Jaya Mary Jacob
Iop Conference Series Earth and Environmental Science, 2023
Nanocellulose-based polymer composites for energy applications
Sam John, Sreelakshmi Rajeevan, K.P. Greeshma, Soney C. George
Applications of Multifunctional Nanomaterials, 2023
Unraveling the synergistic effect of cationic and anionic salt on the corrosion inhibition performance of Garcinia gummi-gutta leaf extract against mild steel in HCl medium
G.K. Shamnamol, P. Rugma, Sam John, Jaya Mary Jacob
Results in Chemistry, 2023
Carbon Nanomaterials for Energy Applications
Advances in Energy Materials New Composites and Techniques for Future Energy Applications, 2023
Fabrication of high-performance symmetric supercapacitor of graphene electrodes by tuning their electrochemical properties
Sreelakshmi Rajeevan, Sam John, Deepalekshmi Ponnamma, Soney C. George
Journal of Energy Storage, 2022
Fabrication of nanostructured molecularly imprinted polymer as enantioselective sensor and sorbent for L-phenylalanine benzyl ester
Sajini T, Sam John, Beena Mathew
Journal of Polymer Research, 2022
Experimental and theoretical evidence for effective corrosion mitigation in mild steel using novel Garcinia gummi-gutta leaf extract
Shamnamol G.K., Sam John, Jaya Mary Jacob
Anti Corrosion Methods and Materials, 2022
Polyvinylidene fluoride: A multifunctional polymer in supercapacitor applications
Sreelakshmi Rajeevan, Sam John, Soney C. George
Journal of Power Sources, 2021
Electrochemical characterization of orthorhombic tungsten trioxide hydrate for battery applications
M. Manuja, Tintu Thomas, Sam John, Joshy Jose, Gijo Jose
Journal of Alloys and Compounds, 2021
The effect of poly(vinylidene fluoride) binder on the electrochemical performance of graphitic electrodes
Sreelakshmi Rajeevan, Sam John, Soney C George
Journal of Energy Storage, 2021
Enhancement in photostability of betalain dye from basella Alba fruits using zinc oxide nanoparticles
S. Muthulingam, K.P. Greeshma, K. Poornima, R. Tamizselvi, Sam John, A.P. Uthirakumar
Materials Today Proceedings, 2021
Corrosion inhibition of mild steel using poly (2-ethyl -2-oxazoline) in 0.1M HCl solution
Zachariah Pulluparampil Mathew, Keerthi Rajan, Cyril Augustine, Bincy Joseph, Sam John
Heliyon, 2020
Rational design and tailoring of imprinted polymeric enantioselective sensor layered on multiwalled carbon nanotubes for the chiral recognition of d-mandelic acid
T. Sajini, Sam John, Beena Mathew
Polymer Chemistry, 2019
Tailoring of photo-responsive molecularly imprinted polymers on multiwalled carbon nanotube as an enantioselective sensor and sorbent for L-PABE
T. Sajini, Sam John, Beena Mathew
Composites Science and Technology, 2019
Corrosion inhibition of mild steel using chitosan / TiO 2 nanocomposite coatings
Sam John, Alfeena Salam, Anju Maria Baby, Abraham Joseph
Progress in Organic Coatings, 2019
Protection of mild steel in hydrochloric acid using methyl benzimidazole substituted 1, 3, 4-oxadiazole: computational, electroanalytical, thermodynamic and kinetic studies
Rugmini Ammal P, Anupama R Prasad, Ramya K, Sam John, Abraham Joseph
Journal of Adhesion Science and Technology, 2019
Photoluminescence of Co: ZnNiO and Zr: ZnNiO nanocomposites capped with biodegradable polymer poly (2-ethyl-2-oxazoline)
Sam John, James Baben George, Abraham Joseph
Aip Conference Proceedings, 2018
Corrosion inhibition of mild steel by N(4)-substituted thiosemicarbazone in hydrochloric acid media
Sam John, R. Jeevana, K.K. Aravindakshan, Abraham Joseph
Egyptian Journal of Petroleum, 2017
Enhanced Inhibition of the Corrosion of Metallic Copper Exposed in Sulphuric Acid Through the Synergistic Interaction of Cysteine and Alanine: Electrochemical and Computational Studies
Mathew Kuruvilla, Anupama R. Prasad, Sam John, Abraham Joseph
Journal of Bio and Tribo Corrosion, 2017
Inhibition of Mild Steel Corrosion using Chitosan–Polyvinyl Alcohol Nanocomposite Films by Sol–Gel Method: An Environmentally Friendly Approach
Sam John, Abraham Joseph, Mathew Kuruvilla, Sajini T
Journal of Bio and Tribo Corrosion, 2017
Performance evaluation of polysulfone/graphene nanocomposites
Ajith James Jose, Muthukaruppan Alagar, Sam John, Runcy Wilson
International Journal of Materials Research, 2017
Corrosion inhibition properties of 1,2,4-Hetrocyclic Systems: Electrochemical, theoretical and Monte Carlo simulation studies
Sam John, Abraham Joseph, T. Sajini, Ajith James Jose
Egyptian Journal of Petroleum, 2017
Electroanalytical Studies on the Interaction Of l-Serine-Based Schiff Base, HHDMP, with Copper in Sulphuric Acid
Mathew Kuruvilla, Sam John, Abraham Joseph
Journal of Bio and Tribo Corrosion, 2016
Polymer Hydrogel Dressing in Wound Management
Advanced Polymeric Materials from Macro to Nano Length Scales, 2016
Enhancement of corrosion protection of mild steel by chitosan/ZnO nanoparticle composite membranes
Sam John, Abraham Joseph, Ajith James Jose, B. Narayana
Progress in Organic Coatings, 2015
Electrochemical studies on the interaction of l-cysteine with metallic copper in sulfuric acid
Mathew Kuruvilla, Sam John, Abraham Joseph
Research on Chemical Intermediates, 2013
Quantum chemical and electrochemical studies on the corrosion inhibition of aluminium in 1 N HNO3 using 1,2,4-triazine
S. John, A. Joseph
Materials and Corrosion, 2013
Adsorption and inhibition effect of methyl carbamate on copper metal in 1 N HNO3: An experimental and theoretical study
Sam John, Mathew Kuruvilla, Abraham Joseph
Rsc Advances, 2013
Surface morphological and impedance spectroscopic studies on the interaction of polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP) with mild steel in acid solutions
Sam John, Mathew Kuruvilla, Abraham Joseph
Research on Chemical Intermediates, 2013
Corrosion protection properties of 4-[(E)-[(2,4-dihydroxy phenyl)methylidene] amino]-6-methyl-3-sulfanylidene-2,3,4,5-tetrahydro-1,2,4- triazin-5-one [DMSTT] toward mild steel in sulfuric acid
Sam John, Abraham Joseph
Journal of Materials Engineering and Performance, 2013
Electroanalytical and theoretical investigations of the corrosion inhibition behavior of bis-1,2,4-triazole precursors EBATTand BBATT on mild steel in 0.1 N HNO3
Sam John, Abraham Joseph
Industrial and Engineering Chemistry Research, 2012
Effective inhibition of mild steel corrosion in 1 M hydrochloric acid using substituted triazines: An experimental and theoretical study
Sam John, Abraham Joseph
Rsc Advances, 2012
Electroanalytical studies of the corrosion-protection properties of 4-amino-4H-1,2,4-triazole-3,5-dimethanol (ATD) on mild steel in 0.5 N sulfuric acid
Sam John, Abraham Joseph
Research on Chemical Intermediates, 2012
Adsorption, Surface Morphological, and Electrochemical Studies on the Inhibitive Properties of 4-(N, N-dimethylaminobenzilidine)-3-mercapto-6-methyl-1, 2, 4-triazin (4H)-5-one (DAMMT) on Mild Steel in 0.5 N H 2SO 4
Sam John, Abraham Joseph
Journal of Dispersion Science and Technology, 2012
Theoretical and electrochemical studies on the effect of substitution on 1, 2, 4- triazole towards mild steel corrosion inhibition in hydrochloric acid
Indian Journal of Chemical Technology, 2012
Electro analytical, surface morphological and theoretical studies on the corrosion inhibition behavior of different 1,2,4-triazole precursors on mild steel in 1 M hydrochloric acid
Sam John, Abraham Joseph
Materials Chemistry and Physics, 2012
Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4-amino-4H,3,5-di(methoxy)-1,2,4-triazole (ATD), BATD, and DBATD on copper metal in 1N H2SO4
S. John, J. Joy, M. Prajila, A. Joseph
Materials and Corrosion, 2011
Spectrophotometric determination of osmium(VIII) in trace amounts using ethylene thiourea (ETU) as chromogenic reagent
Indian Journal of Chemical Technology, 2011
Electrochemical, surface analytical and quantum chemical studies on schiff bases of 4-amino-4H-1,2,4-triazole-3,5-dimethanol (ATD) in corrosion protection of aluminium in 1N HNO3
SAM JOHN, K MOHAMMAD ALI, ABRAHAM JOSEPH
Bulletin of Materials Science, 2011
Inhibition of mild steel corrosion in 1 M hydrochloric acid using (E)-4-(2- chlorobenzylideneamino)-6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (CBMTDT)
Indian Journal of Chemical Technology, 2010
Imidazolidine-2-thione as corrosion inhibitor for mild steel in hydrochloric acid
Indian Journal of Chemical Technology, 2010
Electrochemical and quantum chemical study of 4-[(E)-[(2,4-dihydroxy phenyl) methylidine] amino]-6-methyl-3-sulphanylidine-2,3,4,5-tetra hydro-1,2,4-triazin-5-one [DMSTT]
Sam John, Bincy Joseph, K.V. Balakrishnan, K.K. Aravindakshan, Abraham Joseph
Materials Chemistry and Physics, 2010
Inhibition of mild steel corrosion in 1 M hydrochloric acid by 4-(N,N-dimethylaminobenzilidine)-3-mercapto-6-methyl-1,2,4-triazin(4H)-5-one (DAMMT)
Sam John, Bincy Joseph, K.K. Aravindakshan, Abraham Joseph
Materials Chemistry and Physics, 2010