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Novel S-scheme based nanocomposite of MXene/V 2 O 5 for environmental remediation towards sustainable development: An insight into influencing parameters
(2025) Tyagi, Nahid
In this study, a novel 2D/2D nanocomposite of MXene and V
2
O
5
was synthesized using a facile hydrothermal
approach for the efficient removal of crystal violet (CV), a textile dye from contaminated water to achieve
Sustainable Development Goal (SDG) 14; “Save Lives Below Water”. Here, the catalytic performance of pristine
MXene was prominently boosted with the introduction of ball milled V
2
.
O
5
as an electron generating agent. The
degradation efficiency of synthesized nanocomposite significantly enhanced from 57 % to 92 %, 41 % – 76 % and
7 % – 58 % with an error of ±2 % as compared to pristine MXene at 10, 20 and 30 ppm concentrations of CV,
respectively. The effective degradation of pollutants is ascribed to the electron-transfer via S-scheme based
mechanism and helps in reducing recombination rate of photogenerated carriers, which could produce hydroxyl
radicals (OH
) as a primary species for effectively degradation of pollutants.
Non- template Tailored Macrocyclic Complexes: Synthesis, Characterization, Biological and Computational Studies
(2025) Kumar, Harish
Some novel biologically active tetraaza- macrocyclic complexes of Fe (III) and Cr (III) were synthesized by non- template method.
In this methodology, first macrocyclic ligand was synthesized by condensation reaction between triethylenetetramine and dime
done which was further reacted with trivalent Fe and Cr ions to synthesize the macrocyclic complexes having general formula
[M(C14H26N4)(X)](X)2 where X represents Cl−, NO3
−, CH3COO−. Various physiochemical studies suggested the square pyramidal
geometry around the metal ion of all complexes. With the aid of PXRD technique, it was found that some of the complexes pos
sessed monoclinic crystal system while other complexes showed to have orthorhombic crystal system. The DFT study was also
carried out to examine the various quantum descriptors of ligand and its complexes. Moreover, newly synthesized macrocyclic
ligand and its complexes with Fe and Cr ions were tested against fungal strain as well various bacterial strains. The results of
antibacterial study showed that all complexes exhibited remarkable ability to inhibit the growth of microbes as compared to
ligand. All complexes were found to have drug- likeness behavior as indicated by in- silico studies. Furthermore, these complexes
were also tested for their antioxidant activity and it was observed that complexes showed better antioxidant activity as compared
to ligand and standard solution of ascorbic acid.
Mixed metal oxide nanocomposites for enhanced electrochemical detection of nitrite in food products
(2025) Kumari, Rajni
Mixed metal oxide nanocomposites comprising Manganese, Copper, and Vanadium oxides (Mn/Cu/V
2
synthesized via a modified hydrothermal technique. Synthesized nanocomposites (Mn/Cu/V
O
5
) were
NCs) were
characterized using FT-IR, FE-SEM with EDAX, TGA, X-ray diffraction, and UV–vis spectroscopic techniques. For
the electrochemical detection of nitrite in food samples, a working electrode was specifically designed and
constructed utilizing ternary NCs of Mn/Cu/V
2
O
2
O
5
.
5
The electrochemical behavior of the fabricated working
electrode towards sensing nitrite ion was investigated using voltammetric methods such as Cyclic Voltammetry
(CV), Differential Pulse Voltammetry (DPV), and Linear Sweep Voltammetry (LSV). The electrochemical
impedance spectroscopic approach was employed for the structural study of interface created at the interface of
working electrode and the analyte. The impact of scan rate and electrolytic pH on the electro-oxidation behavior
was examined. The novel working electrode achieved a very low detection capability of 0.01 µM in a detection
range of 0–300 µM. The fabricated electrochemical food sensor shows high sensitivity for sensing nitrite in both
reference and real food samples. This study offers valuable insights into the fabrication of cost-effective and
reliable sensors for detecting additives, colorants, and preservatives in food samples
Logarithmic imputation techniques for temporal surveys: a memory‑based approach explored through simulation and real‑life applications
(2025) Kumar, Anoop
This research introduces memory-based logarithmic imputation techniques and the result
ing estimators to address missing data within the temporal surveys. The mean square error
of the resulting memory type estimators is reported to the first order approximation and the
efficiency conditions are obtained by comparing the properties of the proposed and adapted
imputation methods. The study contains a comprehensive simulation study to evaluate the
performance of the resulting estimators under various conditions, providing insights into
their applicability. Furthermore, the proposed methods are also illustrated through some
real-life applications. The findings of simulation and real data application demonstrate the
effectiveness of the memory type logarithmic imputation methods, providing insights into
its application across different survey contexts and highlighting its potential to enhance
data completeness and reliability in temporal survey analysis.
Light-assisted synergistic effect of Zn-MOF@rGO nanocomposite for methylene blue degradation and toxicity analysis to water reclamation
(2025) Kumar, Vinod
Integrating reduced graphene oxide (rGO) onto nanostructured Metal-organic frameworks (MOFs) offers a
transformative strategy to amplify light harvesting in photocatalysis, suppressing charge carrier recombination
and thus enhancing degradation processes. In this work, we develop a hybrid material (PUC-8@rGO) by
incorporating rGO sheets onto Zn-MOF (PUC-8). The crystals of PUC-8 were prepared using the solvothermal
method, and the nanocomposite material was synthesized using the wet-impregnation procedure. To measure the
photocatalytic activity, prepared samples were utilized to degrade the methylene blue (MB) dye on exposure to
visible light. Several factors affecting photocatalytic activity were examined, including pH, amount of dye,
catalyst dosage and irradiation time to optimize photocatalysis. Remarkably, PUC-8@rGO exhibits an unprec
edented 7 to 8-fold rate increase constant compared to PUC-8 and rGO, credited to its augmented BET surface
area and a narrow band gap, which effectively prolongs electron-hole (e
/h
+
) recombination. Degradation
pathway and intermediate product analysis were done using the LC-MS technique. The BOD (biological oxygen
demand) and COD (chemical oxygen demand) levels in the water significantly reduced following treatment with
PUC-8@rGO, falling within permissible limits for environmentally safe discharge. Furthermore, seed germination
assays attest to low phytotoxicity, endorsing treated water for crop irrigation. Encouragingly, PUC-8@rGO
displays potent cytotoxicity (IC
50
= 0.125 mg/mL) against the human ovarian cancer cell line, SKOV3 as
compared to HaCat (non-tumerous) cells (IC
50
= 0.25 mg/mL), holding promising biomedical implications.
Lattice Distortion Creates Enhancements in Photocatalytic and Electrocapacitive Performance of Sol–Gel-Derived Cu-Doped NiTiO3
(2025) Vij, Ankush
A remarkable 35% enhancement in the photocatalytic and electrocatalytic abil
ities of an ilmenite nickel titanate (NiTiO3) material is reported. This boost in
catalytic performance is achieved by simply creating a static distortion in the
rhombohedral unit cell by replacing a small proportion of a small-size nonde
generate Ni (69 pm) with a large-size degenerate Cu (73pm). The materials are
synthesized by using a simple sol–gel method. The appropriate doping amount of
Cu facilitates the better separation of intrinsic charge carrier pairs by inhibiting
their recombination. The photocatalytic and electrochemical activities of durable
materials in aqueous MB dye (10ppm) and KOH (1molar) electrolyte solutions
are found to be directly associated with this improvement in inherent charge
carrier transfer characteristics. The enhanced photodissociation of MB dye
(42–56%) and specific capacitance (381–450 F g 1) in a KOH (1molar)electrolyte
are in full accord with the investigations carried out using crystallographic and
optoelectronic analysis, charging–discharging measurements, and electro
chemical impedance (EIS) spectroscopy investigations. Same material with high
textural surface areas or controllable particle morphologies might show a far
better photo/electrocatalytic performance in a variety of practical applications.
Intellectual capital and financial performance nexus in Indian hospitality sector: a panel data analysis
(2025) Soriya, Sushila
The present study empirically examines the effects of Intellectual
Capital (IC) components on business performance indicators of Indian
hospitality sector. Further, it explores the role of interactions among IC
components to enhanced corporate performance. The study adopted the
Modified Value-Added Intellectual Coefficient (MVAIC) model to measure IC
and multiple regressions models to analyse the panel data, using a sample of
top 50 Indian hotels. The findings demonstrated that the most important and
statistically significant variables are human capital efficiency, capital employed
efficiency and interaction between human and structural capital efficiencies
which positively influence the hotel’s performance, measured through
profitability and productivity indicators. The findings also reveal IC as strategic
source of enhanced corporate performance. Thus, it may assist the
management, stakeholders, policymakers and government in developing
economies like India to enhance and utilise their IC sources effectively and
efficiently, particularly in hospitality sector.
Influence of symmetry energy on electromagnetic field during heavy-ion collisions
(2025) Sharma, Dhanpat
Heavy-ion collision simulations in intermediate energy regime using isospin quantum molecular
dynamics model have been proposed as a novel means to glean information about the high density behaviour
of nuclear matter. Herein, the influence of modelling the pressure gradient by changing stiffness parameter and
isospin asymmetry on the dynamics of charged particles have been investigated. In this research, three different
values of stiffness parameter, γ = 0.66 (soft), 1 (stiff) and 2 (super-stiff), to tune the anisotropic transverse pressure
gradients have been considered to explore the influence of density-dependent symmetry energy
Esym(ρ) = Esym(ρ0) ρ
γ
ρ0
on the electromagnetic field and energy density evolution. Stiffer symmetry energy (γ = 2) leads to larger
pressure gradient than softer symmetry energy (γ = 0.66) that drives stronger expansion resulting in higher
intensity of (eBy(0,0,0))max and |E · B|max. The correlation of eccentricity, nuclear stopping, centrality with
the electromagnetic field and energy density have been established for different stiffness parameters. To deepen
this study, the influence of isospin asymmetry (N/Z) on the time evolution of electromagnetic field has also been
explored
Influence of symmetry energy on electromagnetic field during heavy-ion collisions
(2025) Sharma, Dhanpat
Heavy-ion collision simulations in intermediate energy regime using isospin quantum molecular
dynamics model have been proposed as a novel means to glean information about the high density behaviour
of nuclear matter. Herein, the influence of modelling the pressure gradient by changing stiffness parameter and
isospin asymmetry on the dynamics of charged particles have been investigated. In this research, three different
values of stiffness parameter, γ = 0.66 (soft), 1 (stiff) and 2 (super-stiff), to tune the anisotropic transverse pressure
gradients have been considered to explore the influence of density-dependent symmetry energy
Esym(ρ) = Esym(ρ0) ρ
γ
ρ0
on the electromagnetic field and energy density evolution. Stiffer symmetry energy (γ = 2) leads to larger
pressure gradient than softer symmetry energy (γ = 0.66) that drives stronger expansion resulting in higher
intensity of (eBy(0,0,0))max and |E · B|max. The correlation of eccentricity, nuclear stopping, centrality with
the electromagnetic field and energy density have been established for different stiffness parameters. To deepen
this study, the influence of isospin asymmetry (N/Z) on the time evolution of electromagnetic field has also been
explored
Inference on inverted exponentiated Rayleigh data from accelerated life testing with hybrid censoring
(2025) Yadav, Priya
This paper addresses the problem of estimating unknown parameters of
the inverted exponentiated Rayleigh distribution within the context of
accelerated life testing. We consider lifetime data observed through step-
stress and type-I hybrid censoring, and incorporate the cumulative expo
sure model assumptions to establish connections between the distribu
tion at various stress levels. We then write the associated likelihood
function based on the observed data and derive maximum likelihood
estimators for the distribution’s unknown parameters. Furthermore,
employing a Bayesian approach, we initially adopt gamma priors and
compute posterior distributions for the parameters. These posterior dis
tributions are then utilized to calculate Bayesian estimates using the
squared error loss function. To assess the performance of maximum like
lihood and Bayesian estimates, we conduct a simulation study under
various scenarios, considering both non-informative and informative
priors. We also evaluate interval estimates and coverage percentages
under both classical and Bayesian approaches. Finally, for illustrative
purposes, we analyze two real data sets, demonstrating the practical
application of our proposed methodology.