Pub Date : 2026-02-01Epub Date: 2026-01-02DOI: 10.1016/j.jics.2025.102397
Rajkumar Manna , Samaresh Ghosh , Swapan Dey
This article describes the use of dithia-aza bearing epoxy-based oligomer (EO) 1 as stabilizer to synthesize silver nanoparticles (EO-AgNPs) 2 and evaluated as nanosensor for Hg2+ ions. 2 was characterized using several methods including FTIR, UV–visible spectroscopy, TEM, and DLS. UV–vis spectroscopy reveals a surface plasmon resonance absorption band at 423 nm. Tansmission electron microscopy (TEM) reveals the presence of spherical AgNPs with an average diameter of 3.94 nm. 2 exhibits the colorimetric sensing and selective detection of Hg2+ ions over other metal ions including Fe3+, Cu2+, Zn2+, Co2+, Ni2+, Mg2+, Sr2+, Pb2+, Ca2+, Cd2+, and Hg2+ ions.
{"title":"Epoxy-based oligomer-stabilized silver nanoparticles for colorimetric sensing of Mercury(II) ions","authors":"Rajkumar Manna , Samaresh Ghosh , Swapan Dey","doi":"10.1016/j.jics.2025.102397","DOIUrl":"10.1016/j.jics.2025.102397","url":null,"abstract":"<div><div>This article describes the use of dithia-aza bearing epoxy-based oligomer (EO) <strong>1</strong> as stabilizer to synthesize silver nanoparticles (EO-AgNPs) <strong>2</strong> and evaluated as nanosensor for Hg<sup>2+</sup> ions. <strong>2</strong> was characterized using several methods including FTIR, UV–visible spectroscopy, TEM, and DLS. UV–vis spectroscopy reveals a surface plasmon resonance absorption band at 423 nm. Tansmission electron microscopy (TEM) reveals the presence of spherical AgNPs with an average diameter of 3.94 nm. <strong>2</strong> exhibits the colorimetric sensing and selective detection of Hg<sup>2+</sup> ions over other metal ions including Fe<sup>3+</sup>, Cu<sup>2+</sup>, Zn<sup>2+</sup>, Co<sup>2+</sup>, Ni<sup>2+</sup>, Mg<sup>2+</sup>, Sr<sup>2+</sup>, Pb<sup>2+</sup>, Ca<sup>2+</sup>, Cd<sup>2+</sup>, and Hg<sup>2+</sup> ions.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102397"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928364","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}
Pub Date : 2026-02-01Epub Date: 2026-01-22DOI: 10.1016/j.jics.2026.102439
Ali Moulahi , Safer Tale Almutairi
Innovative broad spectrum SrTi1-(x + y)GaxCuyO3 (x = y = 0.015 or 0.025) photocatalysts have been synthesized by a low-cost solid state reaction for handling of organic waste. The photocatalytic activities of the synthesized photocatalysts were evaluated through the degradation of reactive yellow 145 and methyl green dyes under natural solar irradiation. The X-ray diffraction (XRD) confirmed the cubic phase nature of SrTiO3, SrTi0.97Ga0.015Cu0·015O3 and SrTi0.95Ga0.025Cu0·025O3 powders. Due to the addition of Ga–Cu ions to SrTiO3, the grains have shown sheets structure compared to the semi-spherical shape of pure powder. The X-ray photoelectron (XPS) signals of SrTi0.95Ga0.025Cu0·025O3 powder confirmed the presence of Ti4+ and Ti3+ mixed states with formation of oxygen defects. The high resolution XPS signals of Ba, Ga and Cu elements verified the +2, +3 and + 2 valence oxidation states for their cations, respectively. After modification by Ga–Cu ions, the energy band gap of SrTiO3 material (3.21 eV) was decreased to 3 and 2.89 eV for SrTi0.97Ga0.015Cu0·015O3 and SrTi0.95Ga0.025Cu0·025O3 powders, respectively. In addition to band gap lowering, long visible light absorption tails were observed for both codoped samples, indicating a high ability for harvesting electromagnetic spectrum. The photo-removal activities of SrTi0.95Ga0.025Cu0·025O3 powder for reactive yellow 145 and methyl green dyes were 96 % and 98 % after sunlight irradiation for 30 min. According to scavenger analysis, the hydroxyl radicals paly the significant role in the removal of reactive yellow 145 and methyl green dyes.
{"title":"New visible light SrTi1-(x+y)GaxCuyO3 (x = y = 0.015 or 0.025) photocatalysts: Fast-removal of hazardous reactive yellow 145 and methyl green dyes","authors":"Ali Moulahi , Safer Tale Almutairi","doi":"10.1016/j.jics.2026.102439","DOIUrl":"10.1016/j.jics.2026.102439","url":null,"abstract":"<div><div>Innovative broad spectrum SrTi<sub>1-(x + y)</sub>Ga<sub>x</sub>Cu<sub>y</sub>O<sub>3</sub> (x = y = 0.015 or 0.025) photocatalysts have been synthesized by a low-cost solid state reaction for handling of organic waste. The photocatalytic activities of the synthesized photocatalysts were evaluated through the degradation of reactive yellow 145 and methyl green dyes under natural solar irradiation. The X-ray diffraction (XRD) confirmed the cubic phase nature of SrTiO<sub>3</sub>, SrTi<sub>0.97</sub>Ga<sub>0.015</sub>Cu<sub>0</sub><sub>·</sub><sub>015</sub>O<sub>3</sub> and SrTi<sub>0.95</sub>Ga<sub>0.025</sub>Cu<sub>0</sub><sub>·</sub><sub>025</sub>O<sub>3</sub> powders. Due to the addition of Ga–Cu ions to SrTiO<sub>3</sub>, the grains have shown sheets structure compared to the semi-spherical shape of pure powder. The X-ray photoelectron (XPS) signals of SrTi<sub>0.95</sub>Ga<sub>0.025</sub>Cu<sub>0</sub><sub>·</sub><sub>025</sub>O<sub>3</sub> powder confirmed the presence of Ti<sup>4+</sup> and Ti<sup>3+</sup> mixed states with formation of oxygen defects. The high resolution XPS signals of Ba, Ga and Cu elements verified the +2, +3 and + 2 valence oxidation states for their cations, respectively. After modification by Ga–Cu ions, the energy band gap of SrTiO<sub>3</sub> material (3.21 eV) was decreased to 3 and 2.89 eV for SrTi<sub>0.97</sub>Ga<sub>0.015</sub>Cu<sub>0</sub><sub>·</sub><sub>015</sub>O<sub>3</sub> and SrTi<sub>0.95</sub>Ga<sub>0.025</sub>Cu<sub>0</sub><sub>·</sub><sub>025</sub>O<sub>3</sub> powders, respectively. In addition to band gap lowering, long visible light absorption tails were observed for both codoped samples, indicating a high ability for harvesting electromagnetic spectrum. The photo-removal activities of SrTi<sub>0.95</sub>Ga<sub>0.025</sub>Cu<sub>0</sub><sub>·</sub><sub>025</sub>O<sub>3</sub> powder for reactive yellow 145 and methyl green dyes were 96 % and 98 % after sunlight irradiation for 30 min. According to scavenger analysis, the hydroxyl radicals paly the significant role in the removal of reactive yellow 145 and methyl green dyes.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102439"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023589","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}
Cuprous oxide (Cu2O) is a promising semiconductor material having unique optical and photocatalytic properties, making it suitable for environmental remediation. This research work investigates the effect of acetic acid (AA) concentration on the hydrothermal synthesis of Cu2O and elaborates its application in the degradation of Methylene Blue (MB). By varying AA concentration, we investigated its influence on the morphology, crystallinity, and photocatalytic efficiency of Cu2O. The synthesized samples were characterized using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, scanning electron microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), UV–vis spectroscopy, and Photo-Luminescence (PL) to investigate the relationship between synthesis parameters and material properties. Using Density Functional Theory (DFT), we calculated the optical and structural properties and compared them with the experimental results. The results of photocatalytic experiments under natural sunlight revealed a significant impact of AA concentration on MB degradation efficiency. This study emphasizes the role of AA as a key parameter for tailoring Cu2O properties to optimize its performance in dye degradation, offering insights for cost-effective wastewater treatment solutions.
{"title":"Enhanced photocatalytic degradation of methylene blue by hydrothermally synthesized Cu2O: Experimental and DFT analysis","authors":"Yugen Kulkarni , R. Greeshma , Niketa Pawar , Shirin Kulkarni , Prashant Chikode","doi":"10.1016/j.jics.2026.102426","DOIUrl":"10.1016/j.jics.2026.102426","url":null,"abstract":"<div><div>Cuprous oxide (Cu<sub>2</sub>O) is a promising semiconductor material having unique optical and photocatalytic properties, making it suitable for environmental remediation. This research work investigates the effect of acetic acid (AA) concentration on the hydrothermal synthesis of Cu<sub>2</sub>O and elaborates its application in the degradation of Methylene Blue (MB). By varying AA concentration, we investigated its influence on the morphology, crystallinity, and photocatalytic efficiency of Cu<sub>2</sub>O. The synthesized samples were characterized using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, scanning electron microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), UV–vis spectroscopy, and Photo-Luminescence (PL) to investigate the relationship between synthesis parameters and material properties. Using Density Functional Theory (DFT), we calculated the optical and structural properties and compared them with the experimental results. The results of photocatalytic experiments under natural sunlight revealed a significant impact of AA concentration on MB degradation efficiency. This study emphasizes the role of AA as a key parameter for tailoring Cu<sub>2</sub>O properties to optimize its performance in dye degradation, offering insights for cost-effective wastewater treatment solutions.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102426"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023710","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}
Pub Date : 2026-02-01Epub Date: 2025-12-29DOI: 10.1016/j.jics.2025.102385
Jyoti H. Ajudiya, Mayur C. Shah
In this study, a simple, rapid, and highly responsive spectrophotometric method was developed for the determination of Ni(II), Zn(II), and Hg(II) using furan-2-carbaldehyde 4-phenyl-3-thiosemicarbazone (FCPTSC) as a colour-forming ligand. Each metal ion formed a stable-coloured complex with characteristic absorption maxima at 388.5 nm for Ni(II), 381.0 nm for Zn(II), and 379.5 nm for Hg(II). Experimental parameters, including pH, ligand concentration, solvent effects, and stability time, were optimized to achieve reproducible and maximum absorbance. Stoichiometric analyses using Job's method and mole-ratio plots confirmed a 1:2 (metal: ligand) composition for all complexes. Coordination through azomethine nitrogen and thione sulfur was supported by FT-IR shifts in the (CN) and (CS) bands, while mass spectrometry verified the expected molecular ion peaks. Calibration studies demonstrated good linearity, precision, and minimal interference from common ions, establishing strong analytical performance. Application to environmental and biological samples yielded results consistent with those obtained using standard methods. Complementary DFT calculations at the B3LYP level yielded optimized geometries free of imaginary frequencies, with HOMO-LUMO gaps of 0.702 eV (Ni), 2.379 eV (Zn), and 2.867 eV (Hg), which supports the observed stability trends. The method is economical, reproducible, and suitable for the routine determination of these metal ions in diverse samples.
本研究以呋喃-2-乙醛- 4-苯基-3-硫代氨基脲（FCPTSC）为显色配体，建立了一种简单、快速、高响应的光度法测定Ni（II）、Zn（II）和Hg（II）。每种金属离子形成了稳定的彩色配合物，Ni（II）的特征吸收最大值为388.5 nm, Zn（II）为381.0 nm, Hg（II）为379.5 nm。优化实验参数，包括pH、配体浓度、溶剂效应和稳定时间，以实现重复性和最大吸光度。化学计量学分析使用Job的方法和摩尔比图证实了所有配合物的1:2（金属：配体）组成。（CN）和（CS）波段的FT-IR位移支持了亚甲基氮和硫硫的配位，而质谱分析证实了预期的分子离子峰。校准研究证明了良好的线性，精度和最小的干扰，从普通离子，建立强大的分析性能。应用于环境和生物样品的结果与使用标准方法获得的结果一致。在B3LYP水平上的互补DFT计算得到了没有虚频率的优化几何形状，HOMO-LUMO间隙为0.702 eV (Ni), 2.379 eV （Zn）和2.867 eV (Hg)，支持观察到的稳定性趋势。该方法经济、重复性好，适用于各种样品中这些金属离子的常规测定。
{"title":"Spectrophotometric and DFT study of Ni(II), Zn(II), and Hg(II) complexes with FCPTSC: Method validation and application to real samples","authors":"Jyoti H. Ajudiya, Mayur C. Shah","doi":"10.1016/j.jics.2025.102385","DOIUrl":"10.1016/j.jics.2025.102385","url":null,"abstract":"<div><div>In this study, a simple, rapid, and highly responsive spectrophotometric method was developed for the determination of Ni(II), Zn(II), and Hg(II) using furan-2-carbaldehyde 4-phenyl-3-thiosemicarbazone (FCPTSC) as a colour-forming ligand. Each metal ion formed a stable-coloured complex with characteristic absorption maxima at 388.5 nm for Ni(II), 381.0 nm for Zn(II), and 379.5 nm for Hg(II). Experimental parameters, including pH, ligand concentration, solvent effects, and stability time, were optimized to achieve reproducible and maximum absorbance. Stoichiometric analyses using Job's method and mole-ratio plots confirmed a 1:2 (metal: ligand) composition for all complexes. Coordination through azomethine nitrogen and thione sulfur was supported by FT-IR shifts in the (C<img>N) and (C<img>S) bands, while mass spectrometry verified the expected molecular ion peaks. Calibration studies demonstrated good linearity, precision, and minimal interference from common ions, establishing strong analytical performance. Application to environmental and biological samples yielded results consistent with those obtained using standard methods. Complementary DFT calculations at the B3LYP level yielded optimized geometries free of imaginary frequencies, with HOMO-LUMO gaps of 0.702 eV (Ni), 2.379 eV (Zn), and 2.867 eV (Hg), which supports the observed stability trends. The method is economical, reproducible, and suitable for the routine determination of these metal ions in diverse samples.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102385"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023719","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}
Pub Date : 2026-02-01Epub Date: 2026-01-03DOI: 10.1016/j.jics.2025.102394
Hanieh Samadi, Majid Saidi
This study investigates the simultaneous production and purification of hydrogen from bio-waste glycerol, a byproduct of biodiesel production, through steam reforming in membrane reactor. To analyze the process, two-dimensional axisymmetric computational fluid dynamics model was developed in COMSOL Multiphysics. The model was designed and validated to examine the distribution of chemical species concentrations under operational conditions, including a steam-to-glycerol ratio of 6, pressure of 1 atm, and sweep gas ratio of 10. The performance of Ni/Al2O3, Co/Al2O3, and Ru/Al2O3catalysts was compared to evaluate their effects on conversion, hydrogen yield and recovery. The results showed conversion of 56.43 % at 673 K and 87.7 % at 773 K. These results closely align with experimental data for nickel catalyst (60 % and 87.9 %, respectively), with relative errors of 5.95 % and 0.23 %, respectively. The Ru/Al2O3catalyst exhibited superior performance in terms of activity and stability. The Ru/Al2O3 catalyst achieved a maximum hydrogen yield of 93 % at 973 K and, under baseline conditions of S/C = 6, 1 atm pressure, and SF = 10, outperformed Ni/Al2O3 (85 %) and Co/Al2O3 (80 %). This superior activity, along with enhanced resistance to coking, reinforces Ru/Al2O3 as an efficient option for sustainable hydrogen production from biodiesel byproducts. Increasing temperature improved glycerol conversion and hydrogen recovery, while higher pressure enhanced hydrogen permeability through the membrane. Optimizing operational pressure is essential, as it may negatively affect reaction equilibrium. The results of this study highlight the potential of using the Ru/Al2O3catalyst and determining optimal operational conditions to achieve efficient and sustainable hydrogen production from bio-waste glycerol.
{"title":"Bio-waste glycerol steam reforming to hydrogen through membrane reactor: Application of computational fluid dynamics technique","authors":"Hanieh Samadi, Majid Saidi","doi":"10.1016/j.jics.2025.102394","DOIUrl":"10.1016/j.jics.2025.102394","url":null,"abstract":"<div><div>This study investigates the simultaneous production and purification of hydrogen from bio-waste glycerol, a byproduct of biodiesel production, through steam reforming in membrane reactor. To analyze the process, two-dimensional axisymmetric computational fluid dynamics model was developed in COMSOL Multiphysics. The model was designed and validated to examine the distribution of chemical species concentrations under operational conditions, including a steam-to-glycerol ratio of 6, pressure of 1 atm, and sweep gas ratio of 10. The performance of Ni/Al<sub>2</sub>O<sub>3</sub>, Co/Al<sub>2</sub>O<sub>3</sub>, and Ru/Al<sub>2</sub>O<sub>3</sub>catalysts was compared to evaluate their effects on conversion, hydrogen yield and recovery. The results showed conversion of 56.43 % at 673 K and 87.7 % at 773 K. These results closely align with experimental data for nickel catalyst (60 % and 87.9 %, respectively), with relative errors of 5.95 % and 0.23 %, respectively. The Ru/Al<sub>2</sub>O<sub>3</sub>catalyst exhibited superior performance in terms of activity and stability. The Ru/Al<sub>2</sub>O<sub>3</sub> catalyst achieved a maximum hydrogen yield of 93 % at 973 K and, under baseline conditions of S/C = 6, 1 atm pressure, and SF = 10, outperformed Ni/Al<sub>2</sub>O<sub>3</sub> (85 %) and Co/Al<sub>2</sub>O<sub>3</sub> (80 %). This superior activity, along with enhanced resistance to coking, reinforces Ru/Al<sub>2</sub>O<sub>3</sub> as an efficient option for sustainable hydrogen production from biodiesel byproducts. Increasing temperature improved glycerol conversion and hydrogen recovery, while higher pressure enhanced hydrogen permeability through the membrane. Optimizing operational pressure is essential, as it may negatively affect reaction equilibrium. The results of this study highlight the potential of using the Ru/Al<sub>2</sub>O<sub>3</sub>catalyst and determining optimal operational conditions to achieve efficient and sustainable hydrogen production from bio-waste glycerol.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102394"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928374","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}
Pub Date : 2026-02-01Epub Date: 2025-12-26DOI: 10.1016/j.jics.2025.102380
Aamal A. Al-Mutairi , Sami A. Al-Hussain , Sobhi M. Gomha , Mahmoud A. Abdelaziz , Rasha Jame , Magdi E.A. Zaki
In this study, 1,4-diaminoanthraquinone (DAAQ) was investigated as an economical and environmentally benign corrosion inhibitor for mild steel in 1 M hydrochloric acid (HCl). Weight-loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy all confirmed strong inhibition, reaching up to 95 % efficiency at 1000 ppm. The polarization results demonstrate that DAAQ acts as a mixed-type inhibitor, while EIS data reveal a substantial increase in charge-transfer resistance and the formation of a stable protective film. The adsorption behavior of DAAQ obeys the Langmuir isotherm, with a negative standard free energy of adsorption (ΔG°ads = −28.92 kJ/mol), indicating predominantly chemisorptive interactions. SEM images showed severe corrosion in the uninhibited acid, whereas the DAAQ-treated surface exhibited a smoother and more uniform morphology. EDX analysis further confirmed the presence of nitrogen-containing species and reduced chlorine levels, supporting the formation of an adherent inhibitor layer. Compared with recently reported organic and green inhibitors, DAAQ offers competitive performance, low toxicity, and a simple, cost-effective structure. These results highlight DAAQ as a promising candidate for practical corrosion mitigation in acidic industrial environments.
{"title":"Cost-effective and environmentally friendly corrosion inhibition of mild steel in HCl using 1,4-diaminoanthraquinone","authors":"Aamal A. Al-Mutairi , Sami A. Al-Hussain , Sobhi M. Gomha , Mahmoud A. Abdelaziz , Rasha Jame , Magdi E.A. Zaki","doi":"10.1016/j.jics.2025.102380","DOIUrl":"10.1016/j.jics.2025.102380","url":null,"abstract":"<div><div>In this study, 1,4-diaminoanthraquinone (DAAQ) was investigated as an economical and environmentally benign corrosion inhibitor for mild steel in 1 M hydrochloric acid (HCl). Weight-loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy all confirmed strong inhibition, reaching up to 95 % efficiency at 1000 ppm. The polarization results demonstrate that DAAQ acts as a mixed-type inhibitor, while EIS data reveal a substantial increase in charge-transfer resistance and the formation of a stable protective film. The adsorption behavior of DAAQ obeys the Langmuir isotherm, with a negative standard free energy of adsorption (ΔG°ads = −28.92 kJ/mol), indicating predominantly chemisorptive interactions. SEM images showed severe corrosion in the uninhibited acid, whereas the DAAQ-treated surface exhibited a smoother and more uniform morphology. EDX analysis further confirmed the presence of nitrogen-containing species and reduced chlorine levels, supporting the formation of an adherent inhibitor layer. Compared with recently reported organic and green inhibitors, DAAQ offers competitive performance, low toxicity, and a simple, cost-effective structure. These results highlight DAAQ as a promising candidate for practical corrosion mitigation in acidic industrial environments.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102380"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928368","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}
Main object of this research is formulation of a metformin sustained released tablet used with AG-g-PAM (Acacia gum-g-Polyacrylamide).
Methods
At first Acacia gum grafted with Polyacrylamide was synthesized with convention technique using CAS as a redox initiator and characterized by FTIR,SEM, XRD and swelling index study.
Result
The polymerization and grafting of AG-g-PAM successfully completed is analyzed by by FTIR, which identified characteristic functional groups, including shifts in amide and hydroxyl peaks, indicating that grafting interactions between acacia gum and polyacrylamide is good. XRD analysis revealed the amorphous nature of the composite, with changes in partially crystalline attributed to the grafting process. SEM method reveals a rough, porous surface structure, which increases the material's capacity to absorb more water and potential for adsorption applications. Acute oral toxicity studies was done according to OECD guideline 425 and and Histopathology studies was carried. The formulation of different batch of tablet were optimized by central composite design 23 using Design expert software 13 version. Than 14 batches of 500 mg tablet were prepared using dry granulation method and grafted polymer as a excipients and evaluated the sustained released tablet such as hardness, thickness, friability, In vitro drug release studies. The F3 and F4 batch was dedicate the sustained released.98 % of durg were released over a period of 8hr in the 6.8 pH Phosphate buffer. as compare the drug released of tablet with native gum was 99 % drug released within the 1hr approx.
Conclusion
Tablets prepared with pure polymer exhibited rapid drug released whereas tablet made with grafted polymer show sustained drug released.
{"title":"Design and characterization of acacia gum –graft- polyacrylamide polymer based sustained release metformin HCl tablets","authors":"Gita Sahu , Shashikant Chandrakar , Sanjib Bahadur","doi":"10.1016/j.jics.2025.102387","DOIUrl":"10.1016/j.jics.2025.102387","url":null,"abstract":"<div><h3>Objective</h3><div>Main object of this research is formulation of a metformin sustained released tablet used with AG-g-PAM (Acacia gum-g-Polyacrylamide).</div></div><div><h3>Methods</h3><div>At first Acacia gum grafted with Polyacrylamide was synthesized with convention technique using CAS as a redox initiator and characterized by FTIR,SEM, XRD and swelling index study.</div></div><div><h3>Result</h3><div>The polymerization and grafting of AG-g-PAM successfully completed is analyzed by by FTIR, which identified characteristic functional groups, including shifts in amide and hydroxyl peaks, indicating that grafting interactions between acacia gum and polyacrylamide is good. XRD analysis revealed the amorphous nature of the composite, with changes in partially crystalline attributed to the grafting process. SEM method reveals a rough, porous surface structure, which increases the material's capacity to absorb more water and potential for adsorption applications. Acute oral toxicity studies was done according to OECD guideline 425 and and Histopathology studies was carried. The formulation of different batch of tablet were optimized by central composite design 2<sup>3</sup> using Design expert software 13 version. Than 14 batches of 500 mg tablet were prepared using dry granulation method and grafted polymer as a excipients and evaluated the sustained released tablet such as hardness, thickness, friability, In vitro drug release studies. The F3 and F4 batch was dedicate the sustained released.98 % of durg were released over a period of 8hr in the 6.8 pH Phosphate buffer. as compare the drug released of tablet with native gum was 99 % drug released within the 1hr approx.</div></div><div><h3>Conclusion</h3><div>Tablets prepared with pure polymer exhibited rapid drug released whereas tablet made with grafted polymer show sustained drug released.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102387"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928413","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}
Pub Date : 2026-02-01Epub Date: 2026-01-24DOI: 10.1016/j.jics.2026.102437
Ebineser Jayaraj Selvaraj, Palaniappan Lakshmanan
In this materialistic world, the multifunctional materials and their applications are widely appreciated. A novel multifunctional nanoparticle, the casein-infused nickel hydroxide, is synthesized through co-precipitation method and analysed for its electrochemical and antibacterial activities in this work. Analysis includes X-ray diffraction (XRD),Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope with Energy Dispersive X-ray analysis (FESEM with EDAX), High-Resolution Transition Electron Microscope (HRTEM), X-ray Photoelectron spectroscopy (XPS). The electrochemical performance of the prepared material was evaluated using Cyclic voltammetry (CV), Galvanostatic charge and discharge (GCD) and Electrochemical impedance spectroscopy (EIS) studies. Specific capacitance of casein-infused nickel hydroxide nanocomposite shows increased specific capacitance, increased energy and power density compared to that of pure nickel hydroxide nanoparticles that are attributed to the surface and structural modification. Further, the synergetic effect found in the casein-infused nickel hydroxide bio-nanocomposite shows an increased antimicrobial activity than that of the pure nickel hydroxide in vitro antimicrobial susceptibility assay.
{"title":"Novel casein-infused nickel hydroxide bio-nanocomposite: Synthesis and analysis of electrochemical and antimicrobial behaviour","authors":"Ebineser Jayaraj Selvaraj, Palaniappan Lakshmanan","doi":"10.1016/j.jics.2026.102437","DOIUrl":"10.1016/j.jics.2026.102437","url":null,"abstract":"<div><div>In this materialistic world, the multifunctional materials and their applications are widely appreciated. A novel multifunctional nanoparticle, the casein-infused nickel hydroxide, is synthesized through co-precipitation method and analysed for its electrochemical and antibacterial activities in this work. Analysis includes X-ray diffraction (XRD),Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope with Energy Dispersive X-ray analysis (FESEM with EDAX), High-Resolution Transition Electron Microscope (HRTEM), X-ray Photoelectron spectroscopy (XPS). The electrochemical performance of the prepared material was evaluated using Cyclic voltammetry (CV), Galvanostatic charge and discharge (GCD) and Electrochemical impedance spectroscopy (EIS) studies. Specific capacitance of casein-infused nickel hydroxide nanocomposite shows increased specific capacitance, increased energy and power density compared to that of pure nickel hydroxide nanoparticles that are attributed to the surface and structural modification. Further, the synergetic effect found in the casein-infused nickel hydroxide bio-nanocomposite shows an increased antimicrobial activity than that of the pure nickel hydroxide <em>in vitro</em> antimicrobial susceptibility assay.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102437"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078622","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}
Pub Date : 2026-02-01Epub Date: 2026-01-10DOI: 10.1016/j.jics.2026.102401
Uliya Mitra , Anoop Arya , Sushma Gupta
Proton Exchange Membrane Fuel Cells (PEMFCs) find widespread application across continents due to their versatility. This manuscript focuses on two objectives. This research focuses on identifying the parameters of a Nexa 1.2 kW Proton Exchange Membrane Fuel Cell (PEMFC) stack. To achieve this, an empirical mathematical model that describes the stack's steady-state behaviour is utilized. The study employs the Chaos Embedded Particle Swarm Optimization (CEPSO) algorithm to ascertain the most suitable values for eleven distinct parameters. This optimization process is guided by minimizing both the Sum of Squared Errors (SSE) and the Root Mean Square Error (RMSE) when comparing the voltages observed in experiments with those predicted by the model. The resulting optimized model demonstrates a high degree of accuracy, with an SSE value of 1.0008 and an RMSE of 0.2236. The value of objective function obtained through CEPSO is compared with three other techniques viz. Genetic Algorithm, Lightning Search Algorithm & Cuckoo Search-Explosion Operator. The second objective is to integrate this optimized model into a DC microgrid. To maximize power extraction and mitigate voltage ripples from the fuel cell, a Cost-effective Clamping Boost Converter (CCB) is implemented, operating at the optimum duty cycle and controlled by a Fuzzy-tuned PID controller. A 100-Ω DC load is connected to the converter output, drawing a 3.4 Amp current at an output voltage of 340 V. All simulations and programming are conducted within the MATLAB Simulink environment.
{"title":"DC microgrid integration of an optimized proton exchange membrane fuel cell utilizing a cost-effective clamping boost converter","authors":"Uliya Mitra , Anoop Arya , Sushma Gupta","doi":"10.1016/j.jics.2026.102401","DOIUrl":"10.1016/j.jics.2026.102401","url":null,"abstract":"<div><div>Proton Exchange Membrane Fuel Cells (PEMFCs) find widespread application across continents due to their versatility. This manuscript focuses on two objectives. This research focuses on identifying the parameters of a Nexa 1.2 kW Proton Exchange Membrane Fuel Cell (PEMFC) stack. To achieve this, an empirical mathematical model that describes the stack's steady-state behaviour is utilized. The study employs the Chaos Embedded Particle Swarm Optimization (CEPSO) algorithm to ascertain the most suitable values for eleven distinct parameters. This optimization process is guided by minimizing both the Sum of Squared Errors (SSE) and the Root Mean Square Error (RMSE) when comparing the voltages observed in experiments with those predicted by the model. The resulting optimized model demonstrates a high degree of accuracy, with an SSE value of 1.0008 and an RMSE of 0.2236. The value of objective function obtained through CEPSO is compared with three other techniques viz. Genetic Algorithm, Lightning Search Algorithm & Cuckoo Search-Explosion Operator. The second objective is to integrate this optimized model into a DC microgrid. To maximize power extraction and mitigate voltage ripples from the fuel cell, a Cost-effective Clamping Boost Converter (CCB) is implemented, operating at the optimum duty cycle and controlled by a Fuzzy-tuned PID controller. A 100-Ω DC load is connected to the converter output, drawing a 3.4 Amp current at an output voltage of 340 V. All simulations and programming are conducted within the MATLAB Simulink environment.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102401"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978940","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}
Pub Date : 2026-02-01Epub Date: 2025-12-31DOI: 10.1016/j.jics.2025.102393
Muhammad Arsyad Suyuti , Rusdi Nur , Ahmad Nurul Muttaqin , Djarot B. Darmadi , Dahlang Tahir
This study presents an eco-friendly, statistically optimized approach to enhancing the mechanical and structural properties of Sansevieria trifasciata fibers (STF) for sustainable composite applications. The treatment combines coconut shell liquid smoke (CS-LS) soaking and microwave heating, optimized using the Taguchi method. The primary treatment factors, soaking time, heating temperature, and heating duration, were optimized to improve the mechanical, morphological, and thermal properties of STF. The optimal conditions 120 min of CS-LS soaking and microwave heating at 40 °C for 30 min resulted in a 33 % increase in tensile strength, from 269.82 MPa (untreated) to 358.87 MPa (treated). Characterization through SEM, FTIR, XRD, TGA, and DSC revealed significant changes in the fiber's morphology, chemical structure, crystallinity, and thermal stability. SEM analysis showed enhanced surface roughness and porosity, while FTIR indicated reduced hydroxyl and lignin content. XRD analysis confirmed an increase in the crystallinity index from 50.72 % to 80.91 %. TGA and DSC analysis demonstrated improved thermal stability and reactivity. These findings validate the effectiveness of the Taguchi-optimized treatment in improving STF's properties, positioning them as promising reinforcement materials for high-performance, environmentally friendly composites.
{"title":"Taguchi-optimized eco-friendly treatment of Sansevieria trifasciata fibers using liquid smoke and microwave heating for enhanced composite properties","authors":"Muhammad Arsyad Suyuti , Rusdi Nur , Ahmad Nurul Muttaqin , Djarot B. Darmadi , Dahlang Tahir","doi":"10.1016/j.jics.2025.102393","DOIUrl":"10.1016/j.jics.2025.102393","url":null,"abstract":"<div><div>This study presents an eco-friendly, statistically optimized approach to enhancing the mechanical and structural properties of <em>Sansevieria trifasciata</em> fibers (STF) for sustainable composite applications. The treatment combines coconut shell liquid smoke (CS-LS) soaking and microwave heating, optimized using the Taguchi method. The primary treatment factors, soaking time, heating temperature, and heating duration, were optimized to improve the mechanical, morphological, and thermal properties of STF. The optimal conditions 120 min of CS-LS soaking and microwave heating at 40 °C for 30 min resulted in a 33 % increase in tensile strength, from 269.82 MPa (untreated) to 358.87 MPa (treated). Characterization through SEM, FTIR, XRD, TGA, and DSC revealed significant changes in the fiber's morphology, chemical structure, crystallinity, and thermal stability. SEM analysis showed enhanced surface roughness and porosity, while FTIR indicated reduced hydroxyl and lignin content. XRD analysis confirmed an increase in the crystallinity index from 50.72 % to 80.91 %. TGA and DSC analysis demonstrated improved thermal stability and reactivity. These findings validate the effectiveness of the Taguchi-optimized treatment in improving STF's properties, positioning them as promising reinforcement materials for high-performance, environmentally friendly composites.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102393"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978945","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}
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