Browsing by Author "Nithya, N"

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AN AMALGAM OF MG-DOPED TIO2 NANOPARTICLES PREPARED BY SOL–GEL METHOD FOR EFFECTIVE ANTIMICROBIAL AND PHOTOCATALYTIC ACTIVITY
(Springer Link, 2021-09-15) Nithya, N; Gopi, S; Bhoopathi, G
In this study, undoped and Magnesium doped TiO2 nanoparticles (Mg-TiO2 NPs) are successfully synthesized via a simple sol–gel method cost-effectively. The prepared Mg- TiO2 NPs is characterized by UV–Vis, FTIR, PL, XRD, FESEM, TEM, and EDAX. UV–Visible Spectroscopy showed that an increase in the optical bandgap concerning the concentration of dopant Mg increases. The bandgap values were found to be 3.57–3.54 eV. FTIR spectra shows that the presence of the characteristic stretching and bending vibrational band of Ti–O bonding at 468 cm−1 and shifts in vibrational bands were observed for Mg-TiO2 NPs. PL spectra of Mg- TiO2 NPs at different concentrations exhibit a strong UV emission band. X-ray diffraction confirmed the formation of the tetragonal anatase phase. The average crystallite size of synthesized samples was found to be 22–19 nm. The average crystallite size of Mg- TiO2 NPs decreases with increasing the concentration of dopant Mg. The FESEM and TEM analysis confirmed that the spherical morphology for both TiO2 and Mg-TiO2 NPs. SAED pattern confirms the crystalline nature of prepared samples. EDAX spectra confirm the presence of Ti, O, and Mg and confirm that Mg2+ ions are present in the TiO2 lattices. The prepared samples were investigated against gram-positive and gram-negative bacteria. The prepared samples exhibit potent antibacterial activity against gram-negative bacteria than the gram-positive bacteria. The prepared samples exhibit significant photocatalytic degradation for Methylene blue (MB).
AN AMALGAM OF MG-DOPED TIO2 NANOPARTICLES PREPARED BY SOL–GEL METHOD FOR EFFECTIVE ANTIMICROBIAL AND PHOTOCATALYTIC ACTIVITY
(Springer Link, 2021-09-15) Nithya, N; Gopi, S; Bhoopathi, G
In this study, undoped and Magnesium doped TiO2 nanoparticles (Mg-TiO2 NPs) are successfully synthesized via a simple sol–gel method cost-effectively. The prepared Mg- TiO2 NPs is characterized by UV–Vis, FTIR, PL, XRD, FESEM, TEM, and EDAX. UV–Visible Spectroscopy showed that an increase in the optical bandgap concerning the concentration of dopant Mg increases. The bandgap values were found to be 3.57–3.54 eV. FTIR spectra shows that the presence of the characteristic stretching and bending vibrational band of Ti–O bonding at 468 cm−1 and shifts in vibrational bands were observed for Mg-TiO2 NPs. PL spectra of Mg- TiO2 NPs at different concentrations exhibit a strong UV emission band. X-ray diffraction confirmed the formation of the tetragonal anatase phase. The average crystallite size of synthesized samples was found to be 22–19 nm. The average crystallite size of Mg- TiO2 NPs decreases with increasing the concentration of dopant Mg. The FESEM and TEM analysis confirmed that the spherical morphology for both TiO2 and Mg-TiO2 NPs. SAED pattern confirms the crystalline nature of prepared samples. EDAX spectra confirm the presence of Ti, O, and Mg and confirm that Mg2+ ions are present in the TiO2 lattices. The prepared samples were investigated against gram-positive and gram-negative bacteria. The prepared samples exhibit potent antibacterial activity against gram-negative bacteria than the gram-positive bacteria. The prepared samples exhibit significant photocatalytic degradation for Methylene blue (MB).
EVALUATION OF GAS SENSOR BEHAVIOUR OF SM3+ DOPED TIO2 NANOPARTICLES
(Springer Link, 2021-05-29) Nithya, N; Ranjith Kumar, E; Magesh, G; Arun, A P; Khlood S, Abou-Melha; Gamila, Badr; Nashwa M, El-Metwaly; Gaber A M, Mersal; Sharmila Rahale, C
The Sol–Gel approach is used to synthesize samarium-doped TiO2 nanoparticles (Sm- TiO2 NPs). Research on the structural, morphological and optical properties of TiO2 nanoparticles by XRD, FESEM, TEM, UV, FTIR, and PL was used. The Sm-TiO2 NPs are verified by the XRD profile of anatase, brookite and rutile phase structures. Crystallite size decreases when Sm doped with TiO2 nanoparticles. The external morphologies of the TiO2 nanoparticles in spherically shaped Sm are captured by FESEM. The sample size distribution and polycrystalline composition of the particles have been analyzed using TEM. The EDX spectrum verifies the presence of Ti, O and Sm elements of all the samples. The values have been found to be very close to what has been expected. Sm substitution greatly affected the optical bandgap of TiO2 nanoparticles. It shows that the band gap decreases from 3.64 to 3.61 eV as the concentrations of Sm increases. FTIR confirms the presence of functional groups and Ti–O bonds present in the prepared sample. PL analysis shows the emission for violet range. Using the dip-coating process, a thin film for sensor function is developed. PVDF flat sheet membrane is used as a substrate for sensing material. For various ethanol concentrations with optimized operating temperatures of 303 K, the sensing behaviour of the sensor element is investigated. The very rapid reaction and recovery time of 10 s and 8 s shows that the prepared samples are appropriate for gas sensor applications.
FACTORS DETERMINING THE SERVICE QUALITY OF E-TICKETING PROCESS IN INDIAN CONTEXT – AN EMPIRICAL STUDY
(International Journal on Emerging Technologies, 2020) Nithya, N; Kiruthika, R
The aim of the present study attempted to measure the factors influencing the service quality of e-ticketing and characterize Indian tire three city's customer satisfaction with web purchasing experience. So many works have been done in service quality of e-ticketing whereas service quality of e-ticketing with respect to both rail and bus transport is very few especially in the Indian context. For this study, a selfadministered questionnaire was drafted and proclamations were coined in discussion with the subject specialists and on line with the references from literature survey. The data was collected by convenience sampling method and customers crosswise over different demographic profiles were covered for the examination. The framework of analysis includes descriptive statics, one-way ANOVA and correlation analysis and reliability analysis. Service Quality factors included ease of use, web composition, information security, specialized help offered by the site and customer satisfaction. The study also found that age, gender and education as the associating profiles in measuring the service quality factors. All the factors were found to be significantly correlated to each other and the same was dealt analytically through correlation analysis. The results of the study confirm the importance of the factors as a vital tool that support organisation’s attempts to encourage their customers to continue using online channels. In the growing world of digitalization, the expectations of the people are increasing this study will help the service providers to understand the gap and enhance the service quality.
IMPACT OF BUSINESS INTELLIGENCE ADOPTION ON PERFORMANCE OF BANKS: A CONCEPTUAL FRAMEWORK
(Springer Link, 2021) Nithya, N; Kiruthika, R
With the mounting prominence of inter-disciplinary methodologies in management, it was appropriate to study the impact of business intelligence on the performance of an organization. In the present study, the author attempted to create a conceptual framework to measure the impact of Business Intelligence Adoption on bank performance in order to add value to the existing views on Business Intelligence Adoption (BIA). Further the literature review approach was carried out to realize the definite gap that exists in the area of BIA. Also in lieu of the strong customer base of modern banks, the study has included Customer Relationship Management as a moderating variable of the proposed framework. This would enhance the focus of BIA in relationship with all the included variables which will enable a bank to lay policies based on the identified relationship between the variables of the study. Literature was assessed on all the variables and the research gap was identified paving way for conceptualisation of a model which can be used in future to measure the impact of BIA on Bank Performance in purview of Customer Relationship Management. This study would be an initial preparatory tool to arrive at a model so as to assess and quantify the impact of BIA on performance of banks in future.
SYNTHESIS AND CHARACTERIZATION OF YTTRIUM DOPED TITANIA NANOPARTICLES FOR GAS SENSING ACTIVITY
(Elsevier, 2019-08-15) Nithya, N; Bhoopathi, G; Magesh, G; Balasundaram, O N
The current work emphasis on the synthesis, characterization and the gas sensing activity of titania nanoparticles and yttrium (Y) doped titania nanoparticles. The structural, morphological and optical properties of titania nanoparticles and Y doped titania nanoparticles were studied by XRD, UV, PL, FTIR, FESEM, EDAX and TEM analysis. The XRD analysis showed that the titania nanoparticles contains tetragonal anatase phase, Y doped titania nanoparticles with various molar concentrations (0.5 mM, 1 mM, 1.5 mM and 2 mM) consists of three different phases. The average crystallite size was found to be 13 - 11 nm. The bandgap energy of titania nanoparticles and Y doped titania nanoparticles were found in the range 3.56–3.52 eV. The blue and green emission peaks were formed in the photoluminescence spectra. The grain size and surface morphology of the samples were analysed by FESEM and TEM-SAED analysis. The elemental compositions of the prepared samples were detected by EDAX. The effect of yttrium concentrations on titania nanoparticles were studied for ethanol gas with short response, recovery time and long-term stability.