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Papers by Manjiri Nagmote

Research paper thumbnail of Nanomaterials and Nanocomposites with Sonochemistry

CRC Press eBooks, May 15, 2024

Research paper thumbnail of Synthesis, Characterization and Study of Thermo-Kinetics Parameters of 1-N-4-SAHDF-Resin-I

The novel terpolymer (1-N-4-SAHDF-Resin-I) has been synthesized by polycondenssation of 1-Naphtho... more The novel terpolymer (1-N-4-SAHDF-Resin-I) has been synthesized by polycondenssation of 1-Naphthol-4sulphonic acid and Hexamethylene diamine with Formaldehyde in an acidic medium with molar proportion of reactants(1:1:2). The terpolymer was characterized by Elemental analysis and different spectral methods to reveal the surface features of terpolymer. For thermal decomposition and thermodynamic parameter studies, terpolymer has been investigated by Thermo Gravimetric Analysis (TGA) at heating rate 10°C min-1 under nitrogen atmosphere. To study the thermal stabilities of polymer, Freeman-Carroll and Sharp-Wentworth methods were used. Thermodynamic parameters like thermal activation energy (Ea), Order of reaction (n), Entropy change (ΔS), Free energy change (ΔF) and Frequency factor (Z) were studied by these two methods and values determined by these methods were in good agreement with each other.

Research paper thumbnail of Advanced Materials and Processing Techniques

BENTHAM SCIENCE PUBLISHERS eBooks, Jun 14, 2023

Research paper thumbnail of Ecofriendly microorganism assisted fabrication of metal nanoparticles and their applications

Biogenic Sustainable Nanotechnology

Research paper thumbnail of Kinetics study of thermal degradation of resin derived from 1-naphthol-4-sulphonic acid, hexamethylene diamine and formaldehyde

The novel terpolymer (1-N-4-SAHDF-Resin-II) has bee n synthesized by polycondensation of 1-Naphth... more The novel terpolymer (1-N-4-SAHDF-Resin-II) has bee n synthesized by polycondensation of 1-Naphthol-4sulphonic acid and Hexamethylene diamine with Forma ldehyde in an acidic medium with molar proportion o f reactants (2:1:3). To reveal the structure of the r esin, the resin was characterized by elemental anal ysis and a spectral method, i.e. composition of terpolymer has been determined on the basis of its elemental anal ysis. The terpolymer resin has been characterized by FT-IR, N MR (H & C) spectra and by SEM. For thermal decomposition studies, 1-N-4-SAHDF-Resin-II terpol ymer has been studied by Thermo Gravimetric Analysi s (TGA) at heating rate 10°C min-1 under nitrogen atmospher e. Detailed thermal degradation studies of the 1-N4 SAHDFResin-II terpolymer has been carried out to ascerta in its thermal stability. Thermal degradation plot has been discussed in order to determine their mode of decom position, order of reaction(n), thermal activation e ergy(Ea), frequency factor(Z),...

Research paper thumbnail of Electrical conductivity study of resin synthesized from 1-naphthol-4-sulphonic acid and hexamethylene diamine and formaldehyde

A terpolymer 1-N-4-SAHDF-Resin-II was synthesized from 1-Naphthol-4-sulphonic acid and Hexamethyl... more A terpolymer 1-N-4-SAHDF-Resin-II was synthesized from 1-Naphthol-4-sulphonic acid and Hexamethylene diamine with formaldehyde by polycondenssation method in an acidic medium with molar proportion of reactants (2:1:3).To reveal the structure of the resin, the resin was characterized by elemental analysis and spectral methods, i.e. composition of terpolymer has been determined on the basis of its elemental analysis. The terpolymer resin has been characterized by UV- Visible, FT-IR and NMR (1H & 13C) spectra and by SEM. The DC conductivity of sample was determined by four probe method. The conductivity of 1-N-4-SAHDF-Resin-II was found to be in the range of 1.021 x10-7 to 9.247 x 10-5 ohm-1cm-1 in the temperature range 313K-433K. The activation energy of the conduction for 1-N-4-SAHDF-Resin-II was found to be 1.14 x 10-20 J/K.

Research paper thumbnail of Thermokinetic Study of Thermal Degradation of Resin Derived from 1-Naphthol-4-sulphonic acid

Asian Journal of Research in Chemistry, 2017

Research paper thumbnail of Oxidation of Organics using Mn(H2PO4)2 as a Catalyst for Rapid Determination of COD of Industrial Saline Effluents

Materials Today: Proceedings, 2019

Chemical Oxygen Demand (COD) is a water quality parameter which indicates concentration of organi... more Chemical Oxygen Demand (COD) is a water quality parameter which indicates concentration of organic compounds as oxygen equivalents in aqueous effluent samples. Determination of COD is frequently done using APHA Standard Method which requires 2 h digestion time. There is need for improving the method to reduce analysis time. In this paper, we report the comparative study for determination of COD by Standard Method using Ag 2 SO 4 and a rapid method using Mn(H 2 PO 4) 2 as a catalyst for different industrial effluent samples having different chloride concentration. A kinetic study has been carried out by varying time interval, H g SO 4 dose and catalyst dose in different concentrated H 3 PO 4 :H 2 SO 4 acid mixture ratio. The optimum conditions for industrial sample having low chloride concentration are 0.3g Mn(H 2 PO 4) 2, per 15 ml of 1:6 H 3 PO 4 : H 2 SO 4, 0.2gm HgSO 4 and digestion time of 5 min., whereas the sample having high chloride concentration requires 0.4 g of HgSO 4 and digestion time of 20 min. The results obtained from the rapid COD determination method in this study and conventional method is found to be comparable. A water quality analyst would be able to save on digestion time by >90 %, if he chooses to perform the COD test as per the rapid method described herein.

Research paper thumbnail of Thermokinetic Study of Thermal Degradation of Resin Derived from 1-Naphthol-4-sulphonic acid

Asian Journal of Research in Chemistry, 2017

Research paper thumbnail of Nanomaterials and Nanocomposites with Sonochemistry

CRC Press eBooks, May 15, 2024

Research paper thumbnail of Synthesis, Characterization and Study of Thermo-Kinetics Parameters of 1-N-4-SAHDF-Resin-I

The novel terpolymer (1-N-4-SAHDF-Resin-I) has been synthesized by polycondenssation of 1-Naphtho... more The novel terpolymer (1-N-4-SAHDF-Resin-I) has been synthesized by polycondenssation of 1-Naphthol-4sulphonic acid and Hexamethylene diamine with Formaldehyde in an acidic medium with molar proportion of reactants(1:1:2). The terpolymer was characterized by Elemental analysis and different spectral methods to reveal the surface features of terpolymer. For thermal decomposition and thermodynamic parameter studies, terpolymer has been investigated by Thermo Gravimetric Analysis (TGA) at heating rate 10°C min-1 under nitrogen atmosphere. To study the thermal stabilities of polymer, Freeman-Carroll and Sharp-Wentworth methods were used. Thermodynamic parameters like thermal activation energy (Ea), Order of reaction (n), Entropy change (ΔS), Free energy change (ΔF) and Frequency factor (Z) were studied by these two methods and values determined by these methods were in good agreement with each other.

Research paper thumbnail of Advanced Materials and Processing Techniques

BENTHAM SCIENCE PUBLISHERS eBooks, Jun 14, 2023

Research paper thumbnail of Ecofriendly microorganism assisted fabrication of metal nanoparticles and their applications

Biogenic Sustainable Nanotechnology

Research paper thumbnail of Kinetics study of thermal degradation of resin derived from 1-naphthol-4-sulphonic acid, hexamethylene diamine and formaldehyde

The novel terpolymer (1-N-4-SAHDF-Resin-II) has bee n synthesized by polycondensation of 1-Naphth... more The novel terpolymer (1-N-4-SAHDF-Resin-II) has bee n synthesized by polycondensation of 1-Naphthol-4sulphonic acid and Hexamethylene diamine with Forma ldehyde in an acidic medium with molar proportion o f reactants (2:1:3). To reveal the structure of the r esin, the resin was characterized by elemental anal ysis and a spectral method, i.e. composition of terpolymer has been determined on the basis of its elemental anal ysis. The terpolymer resin has been characterized by FT-IR, N MR (H & C) spectra and by SEM. For thermal decomposition studies, 1-N-4-SAHDF-Resin-II terpol ymer has been studied by Thermo Gravimetric Analysi s (TGA) at heating rate 10°C min-1 under nitrogen atmospher e. Detailed thermal degradation studies of the 1-N4 SAHDFResin-II terpolymer has been carried out to ascerta in its thermal stability. Thermal degradation plot has been discussed in order to determine their mode of decom position, order of reaction(n), thermal activation e ergy(Ea), frequency factor(Z),...

Research paper thumbnail of Electrical conductivity study of resin synthesized from 1-naphthol-4-sulphonic acid and hexamethylene diamine and formaldehyde

A terpolymer 1-N-4-SAHDF-Resin-II was synthesized from 1-Naphthol-4-sulphonic acid and Hexamethyl... more A terpolymer 1-N-4-SAHDF-Resin-II was synthesized from 1-Naphthol-4-sulphonic acid and Hexamethylene diamine with formaldehyde by polycondenssation method in an acidic medium with molar proportion of reactants (2:1:3).To reveal the structure of the resin, the resin was characterized by elemental analysis and spectral methods, i.e. composition of terpolymer has been determined on the basis of its elemental analysis. The terpolymer resin has been characterized by UV- Visible, FT-IR and NMR (1H & 13C) spectra and by SEM. The DC conductivity of sample was determined by four probe method. The conductivity of 1-N-4-SAHDF-Resin-II was found to be in the range of 1.021 x10-7 to 9.247 x 10-5 ohm-1cm-1 in the temperature range 313K-433K. The activation energy of the conduction for 1-N-4-SAHDF-Resin-II was found to be 1.14 x 10-20 J/K.

Research paper thumbnail of Thermokinetic Study of Thermal Degradation of Resin Derived from 1-Naphthol-4-sulphonic acid

Asian Journal of Research in Chemistry, 2017

Research paper thumbnail of Oxidation of Organics using Mn(H2PO4)2 as a Catalyst for Rapid Determination of COD of Industrial Saline Effluents

Materials Today: Proceedings, 2019

Chemical Oxygen Demand (COD) is a water quality parameter which indicates concentration of organi... more Chemical Oxygen Demand (COD) is a water quality parameter which indicates concentration of organic compounds as oxygen equivalents in aqueous effluent samples. Determination of COD is frequently done using APHA Standard Method which requires 2 h digestion time. There is need for improving the method to reduce analysis time. In this paper, we report the comparative study for determination of COD by Standard Method using Ag 2 SO 4 and a rapid method using Mn(H 2 PO 4) 2 as a catalyst for different industrial effluent samples having different chloride concentration. A kinetic study has been carried out by varying time interval, H g SO 4 dose and catalyst dose in different concentrated H 3 PO 4 :H 2 SO 4 acid mixture ratio. The optimum conditions for industrial sample having low chloride concentration are 0.3g Mn(H 2 PO 4) 2, per 15 ml of 1:6 H 3 PO 4 : H 2 SO 4, 0.2gm HgSO 4 and digestion time of 5 min., whereas the sample having high chloride concentration requires 0.4 g of HgSO 4 and digestion time of 20 min. The results obtained from the rapid COD determination method in this study and conventional method is found to be comparable. A water quality analyst would be able to save on digestion time by >90 %, if he chooses to perform the COD test as per the rapid method described herein.

Research paper thumbnail of Thermokinetic Study of Thermal Degradation of Resin Derived from 1-Naphthol-4-sulphonic acid

Asian Journal of Research in Chemistry, 2017