Journal of the Indian Chemical Society最新文献

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Nickel ferrite-based graphite-paste electrochemical sensor for detection of paracetamol and dopamine molecules

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-17 DOI: 10.1016/j.jics.2025.101633

Yogendra Kumar , Shubham Sharma , Kunj Bihari Mishra , Man Vir Singh , VSR Rajasekhar Pullabhotla , Panchanan Pramanik

NiFe₂O₄ nanoparticles (NPs) were employed to develop a novel electrochemical sensor having the detection limit up to nano mole with remarkable sensitivity. The modified electrochemical sensor was used with high efficacy in the detection of paracetamol (PCM) and dopamine (DA). The NPs being synthesized by combusting nickel acetate and ferric nitrate in the presence of sugar and monoethanolamine. The size, form, and morphology of the NPs were characterized using some advanced analytical techniques including energy-dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), and X-ray diffraction pattern (XRD). On the basis of characterizations, it was observed that the synthesized NPs exhibited a cubic crystal lattice having the size ranging from 10 to 12 nm as calculated by Debye-Scherrer equation. Next, the composite material, enhanced with graphite powder (GP), functioned as an electrode (NiFe₂O₄/GP) for the concurrent identification of PCM and DA through the utilization of cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methodologies. The results obtained from CV and DPV experiments at the surface of NiFe₂O₄/GP electrode reveals that the proposed electrochemical sensor having the remarkable sensitivity, achieving detection limits as low as 300.0 nM for DA and 400.0 nM for PCM, surpassing the values documented in previous research. The electrode demonstrated a linear range of 3.0–160.0 μM for PCM and 5.0–200.0 μM for DA. The oxidation peaks of DA and PCM were easily identifiable when differential pulse voltammetry and cyclic voltammetry were conducted with scan rates of 100 mVs⁻¹ and 50 mVs⁻¹, respectively. The measurements were performed in a phosphate buffer solution with a pH of 6.0. The electrodes yielded positive results when applied to actual samples of PCM and DA.

{"title":"Nickel ferrite-based graphite-paste electrochemical sensor for detection of paracetamol and dopamine molecules","authors":"Yogendra Kumar , Shubham Sharma , Kunj Bihari Mishra , Man Vir Singh , VSR Rajasekhar Pullabhotla , Panchanan Pramanik","doi":"10.1016/j.jics.2025.101633","DOIUrl":"10.1016/j.jics.2025.101633","url":null,"abstract":"<div><div>NiFe<sub>2</sub>O<sub>4</sub> nanoparticles (NPs) were employed to develop a novel electrochemical sensor having the detection limit up to nano mole with remarkable sensitivity. The modified electrochemical sensor was used with high efficacy in the detection of paracetamol (PCM) and dopamine (DA). The NPs being synthesized by combusting nickel acetate and ferric nitrate in the presence of sugar and monoethanolamine. The size, form, and morphology of the NPs were characterized using some advanced analytical techniques including energy-dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), and X-ray diffraction pattern (XRD). On the basis of characterizations, it was observed that the synthesized NPs exhibited a cubic crystal lattice having the size ranging from 10 to 12 nm as calculated by Debye-Scherrer equation. Next, the composite material, enhanced with graphite powder (GP), functioned as an electrode (NiFe<sub>2</sub>O<sub>4</sub>/GP) for the concurrent identification of PCM and DA through the utilization of cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methodologies. The results obtained from CV and DPV experiments at the surface of NiFe<sub>2</sub>O<sub>4</sub>/GP electrode reveals that the proposed electrochemical sensor having the remarkable sensitivity, achieving detection limits as low as 300.0 nM for DA and 400.0 nM for PCM, surpassing the values documented in previous research. The electrode demonstrated a linear range of 3.0–160.0 μM for PCM and 5.0–200.0 μM for DA. The oxidation peaks of DA and PCM were easily identifiable when differential pulse voltammetry and cyclic voltammetry were conducted with scan rates of 100 mVs<sup>−1</sup> and 50 mVs<sup>−1</sup>, respectively. The measurements were performed in a phosphate buffer solution with a pH of 6.0. The electrodes yielded positive results when applied to actual samples of PCM and DA.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101633"},"PeriodicalIF":3.2,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural evaluation of Acetate-Xylene solutions - A thermodynamic and dielectric approach using microwave technique

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-17 DOI: 10.1016/j.jics.2025.101632

P.D. Hambarde , S.S. Birajdar , D.B. Suryawanshi , A.C. Kumbharkhane

At different temperature, frequency and composition the complex permittivity spectra (CPS) of acetate with xylene were measured using Time domain dielectric spectroscopy technique in 10 MHz–50 GHz frequency range. Values of static dielectric parameters have been obtained by fitting CPS to Debye model using non-linear least squares fit method. Bruggeman factor and thermodynamic properties have been evaluated to understand structural variation and dielectric behavior of ethyl acetate-xylene binary mixtures. The experimental evaluation & observation of ε_o^E, (1/τ)^E and g^eff has been commenced to reveal the behavior of molecular construction, intermolecular interactions in n-butyl acetate-xylene binary mixture. Both systems studied in comparison with previous to understand molecular dynamics and effect of high frequency, temperature with variation in composition, which suggest a rise in alignment of molecules, non-linear function with hetero-interactions with decrease in dipoles having slower rotation, and has antiparallel orientation of dipoles with clear understanding the concept of molecular dynamics.

{"title":"Structural evaluation of Acetate-Xylene solutions - A thermodynamic and dielectric approach using microwave technique","authors":"P.D. Hambarde , S.S. Birajdar , D.B. Suryawanshi , A.C. Kumbharkhane","doi":"10.1016/j.jics.2025.101632","DOIUrl":"10.1016/j.jics.2025.101632","url":null,"abstract":"<div><div>At different temperature, frequency and composition the complex permittivity spectra (CPS) of acetate with xylene were measured using Time domain dielectric spectroscopy technique in 10 MHz–50 GHz frequency range. Values of static dielectric parameters have been obtained by fitting CPS to Debye model using non-linear least squares fit method. Bruggeman factor and thermodynamic properties have been evaluated to understand structural variation and dielectric behavior of ethyl acetate-xylene binary mixtures. The experimental evaluation & observation of ε<sub>o</sub><sup>E</sup>, (1/τ)<sup>E</sup> and g<sup>eff</sup> has been commenced to reveal the behavior of molecular construction, intermolecular interactions in n-butyl acetate-xylene binary mixture. Both systems studied in comparison with previous to understand molecular dynamics and effect of high frequency, temperature with variation in composition, which suggest a rise in alignment of molecules, non-linear function with hetero-interactions with decrease in dipoles having slower rotation, and has antiparallel orientation of dipoles with clear understanding the concept of molecular dynamics.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101632"},"PeriodicalIF":3.2,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of high entropy MOFs as enhanced chemiresistive ammonia gas sensor agents

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-16 DOI: 10.1016/j.jics.2025.101631

Prerana Loomba , Sujith Benarzee Nallamalla , A. Jagan Mohan Reddy , Naresh Kumar Katari , Surendra Babu Manabolu Surya

The integration of diverse metals to form high-entropy materials represents a highly effective approach for attaining superior electrochemical properties, attributed to their varied metallic compositions and elevated densities of active sites. A two high-entropy metal-organic framework (HE-MOF-1 and HE-MOF-2) comprising six metals (Mn, Co, Cu, Ni, Zn, and Fe/Zr) and 2-aminoisopthallic acid are efficiently synthesized using a mild solvothermal method. These are characterized by IR, Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM)- Energy-dispersive X-ray spectroscopy (EDX), Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), and X-ray Photoelectron Spectroscopy (XPS) techniques. EDX and XPS studies confirm the presence of metals, while the metal ratio of HE-MOF-1 is Mn_5.19, Fe_5.56, Co_7.29, Ni_6.86, Cu_3.38, Zn_3.92 and HE-MOF-2 is Mn_0.023, Co_6.19, Cu_0.03, Ni_6.57, Zn_3.91, Zr_0.01, are analyzed by ICP-OES respectively. The specific surface area of HE-MOF-1 is 118.935 (m²/g) and HE-MOF-2 is 62.9 (m²/g) by Brunauer–Emmett–Teller (BET) analysis and pore size is 3.14 and 2.81 by the Barrett, Joyner, Halenda (BJH) method respectively. Gas sensing studies were performed using a two-probe static method on ammonia, ethanol, acetone, benzene, toluene, and xylene gases. Gas sensing response values of HE-MOF-1, and HE-MOF-2, are 63.4 and 45.19 respectively at 50 ppm concentration and no sensing response towards ethanol, acetone, benzene, toluene, and xylene even at 50 ppm. The shorter response times of 35 s for HE-MOF-1 and 19 s for HE-MOF-2 at lower concentrations highlight the sensor's suitability for rapid detection of low-level ammonia. Response and recovery times were determined using transient response analysis and stability with time is determined.

{"title":"Synthesis and characterization of high entropy MOFs as enhanced chemiresistive ammonia gas sensor agents","authors":"Prerana Loomba , Sujith Benarzee Nallamalla , A. Jagan Mohan Reddy , Naresh Kumar Katari , Surendra Babu Manabolu Surya","doi":"10.1016/j.jics.2025.101631","DOIUrl":"10.1016/j.jics.2025.101631","url":null,"abstract":"<div><div>The integration of diverse metals to form high-entropy materials represents a highly effective approach for attaining superior electrochemical properties, attributed to their varied metallic compositions and elevated densities of active sites. A two high-entropy metal-organic framework (HE-MOF-1 and HE-MOF-2) comprising six metals (Mn, Co, Cu, Ni, Zn, and Fe/Zr) and 2-aminoisopthallic acid are efficiently synthesized using a mild solvothermal method. These are characterized by IR, Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM)- Energy-dispersive X-ray spectroscopy (EDX), Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), and X-ray Photoelectron Spectroscopy (XPS) techniques. EDX and XPS studies confirm the presence of metals, while the metal ratio of HE-MOF-1 is Mn<sub>5.19</sub>, Fe<sub>5.56</sub>, Co<sub>7.29</sub>, Ni<sub>6.86</sub>, Cu<sub>3.38</sub>, Zn<sub>3.92</sub> and HE-MOF-2 is Mn<sub>0.023</sub>, Co<sub>6.19</sub>, Cu<sub>0.03</sub>, Ni<sub>6.57</sub>, Zn<sub>3.91</sub>, Zr<sub>0.01</sub>, are analyzed by ICP-OES respectively. The specific surface area of HE-MOF-1 is 118.935 (m<sup>2</sup>/g) and HE-MOF-2 is 62.9 (m<sup>2</sup>/g) by Brunauer–Emmett–Teller (BET) analysis and pore size is 3.14 and 2.81 by the Barrett, Joyner, Halenda (BJH) method respectively. Gas sensing studies were performed using a two-probe static method on ammonia, ethanol, acetone, benzene, toluene, and xylene gases. Gas sensing response values of HE-MOF-1, and HE-MOF-2, are 63.4 and 45.19 respectively at 50 ppm concentration and no sensing response towards ethanol, acetone, benzene, toluene, and xylene even at 50 ppm. The shorter response times of 35 s for HE-MOF-1 and 19 s for HE-MOF-2 at lower concentrations highlight the sensor's suitability for rapid detection of low-level ammonia. Response and recovery times were determined using transient response analysis and stability with time is determined.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101631"},"PeriodicalIF":3.2,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of post-heat treatment on corrosion resistance and microstructural characteristics of CMT-WAAM Inconel 718 in 3.5 % NaCl solution

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-15 DOI: 10.1016/j.jics.2025.101625

Santhosh Velmurugan , N. Babu , V. Santhosh

This study investigates the electrochemical corrosion performance and microstructural evolution of Inconel 718 (IN718) produced via Cold Metal Transfer-based Wire Arc Additive Manufacturing (CMT-WAAM). The corrosion performance of as-deposited and API Heat-Treated (HT) samples was evaluated in a 3.5 % NaCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), Atomic Force Microscopy (AFM), X-ray Diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), and Scanning Electron Microscopy (SEM). The API heat treatment involved solution treatment and homogenization at 1080 °C, followed by double aging at 720 °C and 620 °C. Heat-treated samples exhibited reduced corrosion current density (i_corr) and increased polarization resistance (Rp), alongside a more positive corrosion potential (E_corr) compared to as-deposited samples. EIS measurements confirmed enhanced passivation with lower passivation current density, while microstructural characterization revealed reduced Laves phase intensity, refined grains, and improved elemental distribution in heat-treated samples. AFM confirmed that heat-treated specimens exhibited a smoother surface morphology, while SEM revealed fewer surface cracks and enhanced passivation. These findings underscore the importance of API heat treatment in enhancing the corrosion resistance of WAAM-processed IN718.

{"title":"Effect of post-heat treatment on corrosion resistance and microstructural characteristics of CMT-WAAM Inconel 718 in 3.5 % NaCl solution","authors":"Santhosh Velmurugan , N. Babu , V. Santhosh","doi":"10.1016/j.jics.2025.101625","DOIUrl":"10.1016/j.jics.2025.101625","url":null,"abstract":"<div><div>This study investigates the electrochemical corrosion performance and microstructural evolution of Inconel 718 (IN718) produced via Cold Metal Transfer-based Wire Arc Additive Manufacturing (CMT-WAAM). The corrosion performance of as-deposited and API Heat-Treated (HT) samples was evaluated in a 3.5 % NaCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), Atomic Force Microscopy (AFM), X-ray Diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), and Scanning Electron Microscopy (SEM). The API heat treatment involved solution treatment and homogenization at 1080 °C, followed by double aging at 720 °C and 620 °C. Heat-treated samples exhibited reduced corrosion current density (i<sub>corr</sub>) and increased polarization resistance (Rp), alongside a more positive corrosion potential (E<sub>corr</sub>) compared to as-deposited samples. EIS measurements confirmed enhanced passivation with lower passivation current density, while microstructural characterization revealed reduced Laves phase intensity, refined grains, and improved elemental distribution in heat-treated samples. AFM confirmed that heat-treated specimens exhibited a smoother surface morphology, while SEM revealed fewer surface cracks and enhanced passivation. These findings underscore the importance of API heat treatment in enhancing the corrosion resistance of WAAM-processed IN718.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101625"},"PeriodicalIF":3.2,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tetraalkylammonium halide promoted CO2 and CH4 semiclathrate hydrate: Quality of phase equilibrium modeling with various cubic equation of state 四烷基卤化铵促进二氧化碳和甲烷半水合物：利用各种立方状态方程建立相平衡模型的质量

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-14 DOI: 10.1016/j.jics.2025.101629

Pratham M. Shah, Debashis Kundu

Tetra-n-butylammonium bromide (TBAB) and tetra-n-butylammonium fluoride (TBAF)-based semiclathrate hydrates present promising solutions for gas sequestration, transportation, and gas storage applications. In this study, the modeling investigations have been conducted on CO₂ and CH₄ semiclathrate hydrates formed with TBAB and TBAF using the Chen-Guo model. To assess the gas phase fugacity, three different equations of state (EoS) are employed. Initially, a comprehensive comparison of these EoS at a concentration of 5 wt% has been conducted. The EoS exhibiting the lowest absolute average relative deviation (AARD%) has been selected, serving as the basis for further comparisons at varying concentrations. Subsequently, the comparisons to different semiclathrate systems are being extended, considering the most efficient EoS and concentration parameters. The simplicity of the vdW-EoS, with its reliance on only two parameters, contributes to its superior performance in the majority of the configurations examined compared to the more complex RK and PR EoS models. These findings contribute to an enhanced understanding of semiclathrate hydrate systems and improve predictive capabilities in this field.

{"title":"Tetraalkylammonium halide promoted CO2 and CH4 semiclathrate hydrate: Quality of phase equilibrium modeling with various cubic equation of state","authors":"Pratham M. Shah, Debashis Kundu","doi":"10.1016/j.jics.2025.101629","DOIUrl":"10.1016/j.jics.2025.101629","url":null,"abstract":"<div><div>Tetra-n-butylammonium bromide (TBAB) and tetra-n-butylammonium fluoride (TBAF)-based semiclathrate hydrates present promising solutions for gas sequestration, transportation, and gas storage applications. In this study, the modeling investigations have been conducted on CO<sub>2</sub> and CH<sub>4</sub> semiclathrate hydrates formed with TBAB and TBAF using the Chen-Guo model. To assess the gas phase fugacity, three different equations of state (EoS) are employed. Initially, a comprehensive comparison of these EoS at a concentration of 5 wt% has been conducted. The EoS exhibiting the lowest absolute average relative deviation (AARD%) has been selected, serving as the basis for further comparisons at varying concentrations. Subsequently, the comparisons to different semiclathrate systems are being extended, considering the most efficient EoS and concentration parameters. The simplicity of the vdW-EoS, with its reliance on only two parameters, contributes to its superior performance in the majority of the configurations examined compared to the more complex RK and PR EoS models. These findings contribute to an enhanced understanding of semiclathrate hydrate systems and improve predictive capabilities in this field.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101629"},"PeriodicalIF":3.2,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zr–Hf separation of zirconium oxychloride products using Tributyl Phosphate (TBP) in kerosene

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-14 DOI: 10.1016/j.jics.2025.101627

Kharistya Rozana , Ariyani Kusuma Dewi , Herry Poernomo , Seta Ayu Ningtyas , Karna Wijaya

Using salt addition and TBP in kerosene as extractant, zirconium and hafnium was separated. The extraction feed, zirconium oxychloride, was produced by synthesizing melted Kalimantan zircon sand concentration with NaOH. Chloride-based metals have been extracted by dissolving them into a nitric acid media containing salt (sodium nitrate, sodium chloride, sodium carbonate, and sodium sulphate). The current research investigated such as variations in the concentration of nitric acid, composition changes in the aqueous phase and organic phase, modifications in the time of contact, and effect of salt addition for zirconium and hafnium separation. For the chemical composition evaluation of Zr and Hf, XRF was performed. The findings showed that, under optimal conditions, zirconium and hafnium could be separated using sodium nitrate, 1:5 organic/aqueous ratio, 75 min contact period, and 7 M HNO₃ concentration. Using TBP in Kerosene, the zirconium and hafnium separation factor determined was 13.8831.

引用次数: 0

Synthesis of green bioadditives via esterification of glycerol with acetic acid catalysed by modified heteropolyacid on clay support

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-14 DOI: 10.1016/j.jics.2025.101623

Ganapati D. Yadav, Suraj O. Katole

Biodiesel production generates glycerol as a co-product, which needs to be valorized for commercial success. This study focuses on synthesizing bioadditives through the esterification of glycerol with acetic acid to produce monoacetin, diacetin, and triacetin, all of which have significant industrial applications. Monoacetin and diacetin are utilized in cryogenics and as raw materials for biodegradable polyesters, while triacetin finds applications in cosmetics and as a fuel additive.

We report the esterification of glycerol with acetic acid using various heterogeneous solid acid catalysts, highlighting 20 % (w/w) Cs₂.₅H₀.₅PW₁₂O₄₀/K-10 (Cs-DTP-K10) as a green catalyst. This process achieved a remarkable 92 % conversion of glycerol. Key reaction parameters were studied and optimized, including agitation speed, glycerol-to-acetic acid mole ratio, catalyst loading, and temperature. The optimized conditions were a glycerol-to-acetic acid mole ratio of 1:9 at 120 °C, with an agitation speed of 800 rpm for 4 h and a catalyst loading of 0.01 g cm⁻³.

The reaction mechanism is discussed and fitted a kinetic model. The reusability of the 20 % (w/w) Cs-DTP-K10 catalyst was assessed to evaluate its efficacy for producing mono, di, and tri acetin. The catalyst was characterized using various techniques, including XRD, BET (surface area analysis), FTIR, and SEM.

{"title":"Synthesis of green bioadditives via esterification of glycerol with acetic acid catalysed by modified heteropolyacid on clay support","authors":"Ganapati D. Yadav, Suraj O. Katole","doi":"10.1016/j.jics.2025.101623","DOIUrl":"10.1016/j.jics.2025.101623","url":null,"abstract":"<div><div>Biodiesel production generates glycerol as a co-product, which needs to be valorized for commercial success. This study focuses on synthesizing bioadditives through the esterification of glycerol with acetic acid to produce monoacetin, diacetin, and triacetin, all of which have significant industrial applications. Monoacetin and diacetin are utilized in cryogenics and as raw materials for biodegradable polyesters, while triacetin finds applications in cosmetics and as a fuel additive.</div><div>We report the esterification of glycerol with acetic acid using various heterogeneous solid acid catalysts, highlighting 20 % (w/w) Cs₂.₅H₀.₅PW₁₂O₄₀/K-10 (Cs-DTP-K10) as a green catalyst. This process achieved a remarkable 92 % conversion of glycerol. Key reaction parameters were studied and optimized, including agitation speed, glycerol-to-acetic acid mole ratio, catalyst loading, and temperature. The optimized conditions were a glycerol-to-acetic acid mole ratio of 1:9 at 120 °C, with an agitation speed of 800 rpm for 4 h and a catalyst loading of 0.01 g cm⁻³.</div><div>The reaction mechanism is discussed and fitted a kinetic model. The reusability of the 20 % (w/w) Cs-DTP-K10 catalyst was assessed to evaluate its efficacy for producing mono, di, and tri acetin. The catalyst was characterized using various techniques, including XRD, BET (surface area analysis), FTIR, and SEM.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101623"},"PeriodicalIF":3.2,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical sensing of metoclopramide using a green-synthesised reduced graphene oxide and poly(3-methylthiophene)-modified glassy carbon electrode 使用绿色合成的还原氧化石墨烯和聚(3-甲基噻吩)改性玻璃碳电极对甲氧氯普胺进行电化学传感

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-14 DOI: 10.1016/j.jics.2025.101628

Ruzniza Mohd Zawawi , Raghad Ali Hamid

This paper describes an eco-friendly green synthesis approach that utilises tangerine peel extracts to generate reduced graphene oxide (rGO). This rGO was employed for the selective and sensitive electrochemical detection of metoclopramide (MCP) on rGO/poly(3-methylthiophene) (rGO/P3MT)-modified glassy carbon electrode (modified GCE) surface using techniques like cyclic voltammetry (CV) and square-wave voltammetry (SWV). The researchers further employed the Raman and Fourier transform infrared (FTIR) spectroscopy to investigate the morphology of compounds deposited on the GCE surface. The researchers studied the influence of different parameters on MCP oxidation behaviour in addition to the oxidation process of MCP on the rGO/P3MT-modified GCE surface. The results of the CV analysis revealed that rGO-modified GCE displayed a high current response owing to its improved catalytic activity in comparison to the pure GCE and showed a detection limit of 0.048 mM. Furthermore, the fabricated rGO/P3MT-modified GCE demonstrated improved stability and consistency. The modified GCE can accurately detect trace MCP concentrations in pure and pharmaceutical formulations.

{"title":"Electrochemical sensing of metoclopramide using a green-synthesised reduced graphene oxide and poly(3-methylthiophene)-modified glassy carbon electrode","authors":"Ruzniza Mohd Zawawi , Raghad Ali Hamid","doi":"10.1016/j.jics.2025.101628","DOIUrl":"10.1016/j.jics.2025.101628","url":null,"abstract":"<div><div>This paper describes an eco-friendly green synthesis approach that utilises tangerine peel extracts to generate reduced graphene oxide (rGO). This rGO was employed for the selective and sensitive electrochemical detection of metoclopramide (MCP) on rGO/poly(3-methylthiophene) (rGO/P3MT)-modified glassy carbon electrode (modified GCE) surface using techniques like cyclic voltammetry (CV) and square-wave voltammetry (SWV). The researchers further employed the Raman and Fourier transform infrared (FTIR) spectroscopy to investigate the morphology of compounds deposited on the GCE surface. The researchers studied the influence of different parameters on MCP oxidation behaviour in addition to the oxidation process of MCP on the rGO/P3MT-modified GCE surface. The results of the CV analysis revealed that rGO-modified GCE displayed a high current response owing to its improved catalytic activity in comparison to the pure GCE and showed a detection limit of 0.048 mM. Furthermore, the fabricated rGO/P3MT-modified GCE demonstrated improved stability and consistency. The modified GCE can accurately detect trace MCP concentrations in pure and pharmaceutical formulations.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 4","pages":"Article 101628"},"PeriodicalIF":3.2,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Cu2O nanoparticles via thermoreduction on heat-treated zeolite 4A nanoreactor: A simple two-step approach

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-13 DOI: 10.1016/j.jics.2025.101624

J.E. Leal-Perez , A. Hurtado-Macias , M. Cortez-Valadez , A. Bórquez-Mendivil , C. Vargas-Arana , S. Horta-Piñeres , J.M. Mendivil-Escalante , A. Navarro-Badilla , B.A. Garcia-Grajeda , J. Flores-Valenzuela

This work presents a straightforward two-step approach for synthesizing Cu₂O nanoparticles. Initially, zeolite 4A undergoes a heat treatment to activate its surface. Subsequently, copper ions are adsorbed onto the activated zeolite surface and subjected to thermoreduction. This approach offers several key advantages. It streamlines the synthesis process, making it much more efficient and easier to perform. Importantly, it allows for precise control over the size and distribution of the nanoparticles, which is crucial for many applications. Finally, the zeolite substrate acts as a stabilizing agent, significantly improving the longevity and ease of handling of the nanoparticles. Characterization techniques, including HR-TEM, XRD, and UV–vis spectroscopy, were employed to investigate the properties of the synthesized Cu₂O nanoparticles. HR-TEM analysis revealed semi-spherical nanoparticles with a size of approximately 5 ± 2 nm. UV–vis spectroscopy provided insights into the formation of oxide species during the thermoreduction process. The implementation of zeolite 4A nanoreactor as a template confers numerous benefits, including the capacity to regulate the dimensions and morphology of the nanoparticles, in addition to enhancing their stability and dispersibility.

Additionally, the zeolite can act as a support for the nanoparticles, preventing agglomeration and facilitating their separation from the reaction mixture. This simple and efficient approach holds promise for various applications, such as catalysis, sensing, and energy storage, where the unique properties of Cu₂O nanoparticles can be harnessed. Further research is needed to optimize the synthesis conditions and explore the potential applications of these materials.

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引用次数: 0

Study of faradic and non-faradic behaviour in a compost-based symmetric energy storage device

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-02-12 DOI: 10.1016/j.jics.2025.101622

Poonam , Vijay Kumar , Suhaas Gupta , Ravi Kant Choubey , Rajeev Ahuja , Sunil Kumar

The abundance of compost and its bio-circular economy, wherein bio-waste seamlessly transforms into compost, renders it a promising candidate for investigation as a new type of biomaterial for storing renewable energy; to that effect, in this work the capacitive and non-capacitive charge storage in a compost based symmetric device configuration have been investigated. Normally, capacitive charge storage aligns with the principles of dielectric or electrolytic capacitance, which is non-faradaic in nature; however, in the case of batteries, faradaic processes dominate for non-capacitive charge storage. Due to the complex nature of compost, the type of compost and the type of current collectors have been varied while using distilled water as an aqueous media, and the investigation in this work encompasses both capacitive and non-capacitive processes in a symmetric dual current collector device to delineate and discern the diverse charge storage mechanisms inherent to capacitors and batteries. Test cells have been optimised with respect to volume, distance between the current collector, and variation in applied current; following that, optimised test cells have been analysed using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) studies and electrochemical impedance spectroscopy (EIS) to study non-faradaic and faradaic processes in terms of charge storage capability, charging and discharging time, specific capacitance, and specific capacity. To observe the role of microorganisms in the compost, autoclave studies using the best compost sample (baked at 120 °C for 60min) have also been performed. In addition, chrono-amperometry studies have been performed to investigate the stability of the device. The results show a multifunctional charge storage behaviour in compost being used as a bio-media, and hence, this work lays a foundation for a new type of eco-friendly bio-media for charge storage.

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引用次数: 0

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