Pub Date : 2026-02-01DOI: 10.1016/j.jics.2026.102449
Ahmad Shobib , Aminuddin , Nur Rokhati , Bambang Pramudono
This study investigates the isolation and modification of lignin from tropical hardwoods, i.e: teak (Tectona grandis), mahogany (Swietenia macrophylla), and sengon (Albizia chinensis), for the production of surfactant-lignin sulfonate (SLS) used in enhanced oil recovery (EOR). Lignin was extracted using hydrogen peroxide and sodium hydroxide, followed by solvolysis. The biomass composition was analyzed, revealing significant variation in hemicellulose content, with sengon showing the highest content (41 %-wt) compared to teak and mahogany. Sulfonation was carried out at varying temperatures, showing that higher temperatures generally increased SLS yield and surfactant performance. FTIR analysis confirmed structural differences between the lignins from different biomass sources. The produced SLS demonstrated favorable properties for EOR applications, including good compatibility with synthetic brine, stability at elevated temperatures, and effective phase behavior. These findings suggest that biomass-derived SLS could be a sustainable and cost-effective alternative to conventional surfactants for EOR processes.
{"title":"Sustainable production of lignin-based surfactants from tropical wood waste via delignification–Sulfonation for enhanced oil recovery","authors":"Ahmad Shobib , Aminuddin , Nur Rokhati , Bambang Pramudono","doi":"10.1016/j.jics.2026.102449","DOIUrl":"10.1016/j.jics.2026.102449","url":null,"abstract":"<div><div>This study investigates the isolation and modification of lignin from tropical hardwoods, i.e: teak (<em>Tectona grandis</em>), mahogany (<em>Swietenia macrophylla</em>), and sengon (<em>Albizia chinensis</em>), for the production of surfactant-lignin sulfonate (SLS) used in enhanced oil recovery (EOR). Lignin was extracted using hydrogen peroxide and sodium hydroxide, followed by solvolysis. The biomass composition was analyzed, revealing significant variation in hemicellulose content, with sengon showing the highest content (41 %-wt) compared to teak and mahogany. Sulfonation was carried out at varying temperatures, showing that higher temperatures generally increased SLS yield and surfactant performance. FTIR analysis confirmed structural differences between the lignins from different biomass sources. The produced SLS demonstrated favorable properties for EOR applications, including good compatibility with synthetic brine, stability at elevated temperatures, and effective phase behavior. These findings suggest that biomass-derived SLS could be a sustainable and cost-effective alternative to conventional surfactants for EOR processes.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102449"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078621","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 : 2026-02-01DOI: 10.1016/j.jics.2026.102428
Yanmei Yu , Jun Shen , Juhua Luo
Seawater sea sand recycled concrete (SSRAC) has a wide range of application prospects in relieving resource constraints and urban construction waste disposal. Theoretically, after being crushed, SSRAC can still be used as fine aggregate. However, the strength of recycled fine aggregates (RA) and the corrosion problem of chloride ions limited the application of SSRAC. Here, we designed the orthogonal experiment to evaluate the effects of recycled fine aggregate (RFA) admixture, water-glass admixture and sand-cement ratio on the compressive strength, and chloride curing ability of SSRAC. The hydration products and microscopic morphology of SSRAC were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The results showed that the RFA was the main factor to affect the compressive strength, and chloride curing ability of SSRAC. Especially, the amount of water glass admixture had an obvious effect on the compressive strength and chloride curing ability of SSRAC. With the increase of RFA admixture, the compressive strength of SSRAC firstly increased and then decreased, continues to decrease with the increase of water glass content. The chloride curing ability decreased and then increased with the increase of RFA content, and increased with the increase of water glass content. Therefore, when the RFA admixture was 60 % and the water glass admixture was 1.5 %, the compressive strength and chloride curing capacity of SSRAC were 31.2 MPa and 1.05, respectively, at which time the water-soluble chloride ion content was 0.218 %. The results and new findings can provide a basis for the preparation of SSRAC.
{"title":"Evaluation of recycled fine aggregate admixture on the performance of seawater sea sand recycled concrete","authors":"Yanmei Yu , Jun Shen , Juhua Luo","doi":"10.1016/j.jics.2026.102428","DOIUrl":"10.1016/j.jics.2026.102428","url":null,"abstract":"<div><div>Seawater sea sand recycled concrete (SSRAC) has a wide range of application prospects in relieving resource constraints and urban construction waste disposal. Theoretically, after being crushed, SSRAC can still be used as fine aggregate. However, the strength of recycled fine aggregates (RA) and the corrosion problem of chloride ions limited the application of SSRAC. Here, we designed the orthogonal experiment to evaluate the effects of recycled fine aggregate (RFA) admixture, water-glass admixture and sand-cement ratio on the compressive strength, and chloride curing ability of SSRAC. The hydration products and microscopic morphology of SSRAC were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The results showed that the RFA was the main factor to affect the compressive strength, and chloride curing ability of SSRAC. Especially, the amount of water glass admixture had an obvious effect on the compressive strength and chloride curing ability of SSRAC. With the increase of RFA admixture, the compressive strength of SSRAC firstly increased and then decreased, continues to decrease with the increase of water glass content. The chloride curing ability decreased and then increased with the increase of RFA content, and increased with the increase of water glass content. Therefore, when the RFA admixture was 60 % and the water glass admixture was 1.5 %, the compressive strength and chloride curing capacity of SSRAC were 31.2 MPa and 1.05, respectively, at which time the water-soluble chloride ion content was 0.218 %. The results and new findings can provide a basis for the preparation of SSRAC.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102428"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078623","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}
Paper-based analytical Surface-Enhanced Raman Scattering (SERS) spectroscopy enables rapid and highly sensitive detection of melamine in coffee powder. This performance is attributed to the selective interaction between melamine and a β-cyclodextrin copolymer functionalized with silver nanoparticles (AgNPs). Melamine is a nitrogen-rich compound that has been fraudulently introduced into dairy products to artificially inflate measured protein levels for economic gain. Nevertheless, high levels of melamine consumption pose significant health risks. SERS is widely recognized as a powerful tool for the identification of trace contaminants such as melamine. In the present work, a flexible paper-supported nanoparticle hybrid surface plasmon resonance substrate was prepared by depositing β-cyclodextrin–modified AgNPs onto filter paper. The method was evaluated using an external calibration procedure to determine its linearity, sensitivity, repeatability, and recovery. The results demonstrated satisfactory linearity (R2 = 0.85) for melamine detection in coffee powder across a concentration range of 1000 ppm–0.0001 ppm, with a detection limit of 0.001 ppm.
{"title":"Sensitive and rapid detection of melamine in coffee powder by beta-cyclodextrin copolymer coated with silver nanoparticles by paper based Analytical-SERS technique","authors":"Deepak Kumar, Nazia Tarannum, Aditi Gautam, Tanu Chauhan","doi":"10.1016/j.jics.2026.102451","DOIUrl":"10.1016/j.jics.2026.102451","url":null,"abstract":"<div><div>Paper-based analytical Surface-Enhanced Raman Scattering (SERS) spectroscopy enables rapid and highly sensitive detection of melamine in coffee powder. This performance is attributed to the selective interaction between melamine and a β-cyclodextrin copolymer functionalized with silver nanoparticles (AgNPs). Melamine is a nitrogen-rich compound that has been fraudulently introduced into dairy products to artificially inflate measured protein levels for economic gain. Nevertheless, high levels of melamine consumption pose significant health risks. SERS is widely recognized as a powerful tool for the identification of trace contaminants such as melamine. In the present work, a flexible paper-supported nanoparticle hybrid surface plasmon resonance substrate was prepared by depositing β-cyclodextrin–modified AgNPs onto filter paper. The method was evaluated using an external calibration procedure to determine its linearity, sensitivity, repeatability, and recovery. The results demonstrated satisfactory linearity (R<sup>2</sup> = 0.85) for melamine detection in coffee powder across a concentration range of 1000 ppm–0.0001 ppm, with a detection limit of 0.001 ppm.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102451"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078617","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 : 2026-02-01DOI: 10.1016/j.jics.2026.102422
Lei Zhang , Liu Zhang , Ya Chen , Lei Zhang , Chenxi Tan , Ruikang Song , Shizhe Gao
This study employed 3,5-pyrazoledicarboxylic acid (PZDC) as a ligand to synthesize aluminum-based metal-organic frameworks (Al-PZDC) via an in-situ hydrothermal method. Al-PZDC composites were constructed using two loading methods—preloading and postloading—with 13X molecular sieves, activated carbon, and γ-Al2O3 as carriers, respectively. The physicochemical properties of the materials were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The NH3 adsorption mechanism was investigated by combining adsorption kinetic models, pre- and post-adsorption spectral analysis, and in situ differential Raman infrared spectroscopy (Insitu DRIFTS). The results indicate that Al-PZDC was successfully loaded onto each carrier; Composites prepared by the pre-loading method exhibited superior adsorption performance compared to those from the post-loading method. The composite (13X molecular sieve @Al-PZDC-0.4) prepared using 13X molecular sieve as the carrier and the pre-loading method demonstrated the most outstanding NH3 adsorption performance, achieving a saturation adsorption capacity of 100.57 mg g−1 at 25 °C and 1 % NH3 concentration. Kinetics analysis indicates that NH3 adsorption is primarily chemical adsorption supplemented by physical adsorption. The adsorption mechanism involves physical adsorption, pore filling, hydrogen bonding interactions, and the synergistic effects of Lewis acid (l-acid) and Brønsted acid (B-acid) sites.
{"title":"Efficient ammonia sequestration by Al-based MOF composites: Synergistic regulation of supports and loading strategies and investigation of the adsorption mechanism","authors":"Lei Zhang , Liu Zhang , Ya Chen , Lei Zhang , Chenxi Tan , Ruikang Song , Shizhe Gao","doi":"10.1016/j.jics.2026.102422","DOIUrl":"10.1016/j.jics.2026.102422","url":null,"abstract":"<div><div>This study employed 3,5-pyrazoledicarboxylic acid (PZDC) as a ligand to synthesize aluminum-based metal-organic frameworks (Al-PZDC) via an in-situ hydrothermal method. Al-PZDC composites were constructed using two loading methods—preloading and postloading—with 13X molecular sieves, activated carbon, and γ-Al<sub>2</sub>O<sub>3</sub> as carriers, respectively. The physicochemical properties of the materials were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The NH<sub>3</sub> adsorption mechanism was investigated by combining adsorption kinetic models, pre- and post-adsorption spectral analysis, and in situ differential Raman infrared spectroscopy (Insitu DRIFTS). The results indicate that Al-PZDC was successfully loaded onto each carrier; Composites prepared by the pre-loading method exhibited superior adsorption performance compared to those from the post-loading method. The composite (13X molecular sieve @Al-PZDC-0.4) prepared using 13X molecular sieve as the carrier and the pre-loading method demonstrated the most outstanding NH<sub>3</sub> adsorption performance, achieving a saturation adsorption capacity of 100.57 mg g<sup>−1</sup> at 25 °C and 1 % NH<sub>3</sub> concentration. Kinetics analysis indicates that NH<sub>3</sub> adsorption is primarily chemical adsorption supplemented by physical adsorption. The adsorption mechanism involves physical adsorption, pore filling, hydrogen bonding interactions, and the synergistic effects of Lewis acid (<span>l</span>-acid) and Brønsted acid (B-acid) sites.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102422"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078618","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 : 2026-02-01DOI: 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 : 2026-02-01DOI: 10.1016/j.jics.2026.102442
Aman Kumar , J. Prabhakaran , Cheshta , Pardeep Kumar Jangra , Harveer Singh Pali , M.A. Shah
Nickel-based metal-organic frameworks (Ni-MOFs) are synthesized and employed as efficient adsorbents for the removal of cadmium (Cd2+) ions from aqueous solutions. The adsorption process is optimized using response surface methodology (RSM) with a central composite design (CCD) to evaluate the influence of three key factors: pH, contact time, and adsorbent concentration. Analysis of variance (ANOVA) confirms the adequacy of the quadratic model, with high correlation coefficients (R2 = 0.9969 and = 0.9941) and low coefficient of variation, indicating strong model reliability. Among the studied parameters, solution pH emerges as the most significant factor influencing Cd2+ removal. The optimization results reveal that a pH of 5.0, a contact time of 15 min, and an adsorbent concentration of 0.03 g yield an optimum cadmium removal efficiency of 79.9 %. Confirmatory experiments validate the predicted model outcomes, demonstrating close agreement between experimental and theoretical values. This study establishes Ni-MOFs as a promising, efficient, and reusable adsorbent for cadmium remediation in wastewater treatment applications.
{"title":"Nickel MOF enabled cadmium adsorption: A response surface optimization study","authors":"Aman Kumar , J. Prabhakaran , Cheshta , Pardeep Kumar Jangra , Harveer Singh Pali , M.A. Shah","doi":"10.1016/j.jics.2026.102442","DOIUrl":"10.1016/j.jics.2026.102442","url":null,"abstract":"<div><div>Nickel-based metal-organic frameworks (Ni-MOFs) are synthesized and employed as efficient adsorbents for the removal of cadmium (Cd<sup>2+</sup>) ions from aqueous solutions. The adsorption process is optimized using response surface methodology (RSM) with a central composite design (CCD) to evaluate the influence of three key factors: pH, contact time, and adsorbent concentration. Analysis of variance (ANOVA) confirms the adequacy of the quadratic model, with high correlation coefficients (R<sup>2</sup> = 0.9969 and <span><math><mrow><msubsup><mi>R</mi><mrow><mi>a</mi><mi>d</mi><mi>j</mi></mrow><mn>2</mn></msubsup></mrow></math></span> = 0.9941) and low coefficient of variation, indicating strong model reliability. Among the studied parameters, solution pH emerges as the most significant factor influencing Cd<sup>2+</sup> removal. The optimization results reveal that a pH of 5.0, a contact time of 15 min, and an adsorbent concentration of 0.03 g yield an optimum cadmium removal efficiency of 79.9 %. Confirmatory experiments validate the predicted model outcomes, demonstrating close agreement between experimental and theoretical values. This study establishes Ni-MOFs as a promising, efficient, and reusable adsorbent for cadmium remediation in wastewater treatment applications.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102442"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078620","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 : 2026-02-01DOI: 10.1016/j.jics.2026.102443
Mohamed Khitous , Mohamed Trari
This study investigates the use of biochar derived from municipal sewage sludge, pyrolyzed at 450 °C in an O2-free atmosphere, as an adsorbent for the removal of Cr(VI) from wastewater. The biochar was physicochemically characterized by FTIR, SEM, XRD, XPS, BET analysis, and pH at the zero point charge (pHzpc). Batch adsorption experiments were conducted at room temperature to evaluate its performance for Cr(VI) removal. The effects of initial Cr(VI) concentration, adsorbent dose, agitation time, and pH on the adsorption were explored. The adsorption capacity increased from 23.19 to 81.75 mg/g as the initial Cr(VI) concentration rose from 30 to 100 mg/L. Optimal adsorption occurred at pH⁓5, with an agitation time of 60 min and a sorbent dose of 5 g/L. Linear regression analysis indicated that the Freundlich model provided a better fit than the Langmuir model for describing Cr(VI) adsorption onto the biochar. The adsorption kinetics followed a pseudo-second-order model, suggesting that the process is governed by chemisorption. In addition, the biochar showed excellent recyclability and reusability over four regeneration-adsorption cycles, demonstrating its potential for suitable long-term applications. This study provides an efficient, low-cost and eco-friendly adsorbent for treating Cr(VI)-containing wastewater, while also offering a sustainable solution for sewage sludge management.
{"title":"Synthesis and characterization of sewage sludge-derived biochar for treating Cr(VI)-contaminated wastewater","authors":"Mohamed Khitous , Mohamed Trari","doi":"10.1016/j.jics.2026.102443","DOIUrl":"10.1016/j.jics.2026.102443","url":null,"abstract":"<div><div>This study investigates the use of biochar derived from municipal sewage sludge, pyrolyzed at 450 °C in an O<sub>2</sub>-free atmosphere, as an adsorbent for the removal of Cr(VI) from wastewater. The biochar was physicochemically characterized by FTIR, SEM, XRD, XPS, BET analysis, and pH at the zero point charge (pH<sub>zpc</sub>). Batch adsorption experiments were conducted at room temperature to evaluate its performance for Cr(VI) removal. The effects of initial Cr(VI) concentration, adsorbent dose, agitation time, and pH on the adsorption were explored. The adsorption capacity increased from 23.19 to 81.75 mg/g as the initial Cr(VI) concentration rose from 30 to 100 mg/L. Optimal adsorption occurred at pH⁓5, with an agitation time of 60 min and a sorbent dose of 5 g/L. Linear regression analysis indicated that the Freundlich model provided a better fit than the Langmuir model for describing Cr(VI) adsorption onto the biochar. The adsorption kinetics followed a pseudo-second-order model, suggesting that the process is governed by chemisorption. In addition, the biochar showed excellent recyclability and reusability over four regeneration-adsorption cycles, demonstrating its potential for suitable long-term applications. This study provides an efficient, low-cost and eco-friendly adsorbent for treating Cr(VI)-containing wastewater, while also offering a sustainable solution for sewage sludge management.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 2","pages":"Article 102443"},"PeriodicalIF":3.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078619","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 : 2026-01-29DOI: 10.1016/j.jics.2026.102453
E. Danladi , L.F. Koao , T.E. Motaung , S.V. Motloung
The Cs2AgBiBr6 double halide perovskite has catered for the problem related with lead toxicity and stability in perovskite solar cells (PSCs). Unfortunately, the unstable hole transport layer (HTL) such as spiro-OMeTAD, limited diffusion length of charge carriers, introduced interface defects, and inferior hole extraction capability results to poor performance. In this work, we presented, a simplified design and modeling of an improved stable HTL-free perovskite solar cells with Li+ and Na+ co-doped Cs2AgBiBr6-based absorber. Guided by solar capacitance simulation software (SCAPS-1D), this present work examined the performance of PSCs with both Cs2AgBiBr6 and Cs1·96Li0·01Na0·03AgBiBr6 absorbing material. The Cs2AgBiBr6-based device gave an open circuit voltage (Voc), short circuit current density (Jsc), fill factor (FF) and power conversion efficiency (PCE) of 0.31V, 9.19 mA/cm2, 68.15% and 1.97%, while the Cs1·96Li0·01Na0·03AgBiBr6 device presents 0.76 V, 10.53 mA/cm2, 70.54% and 5.63% as Voc, Jsc, FF and PCE. This shows that Cs1·96Li0·01Na0·03AgBiBr6-based device was more promising. The performance of the FTO/TiO2/Cs1·96Li0·01Na0·03AgBiBr6/C device was optimized by varying the ETL thickness and doping concentration, perovskite thickness and doping concentration, perovskite defect density and band gap to obtain 0.02 μm, 1017 cm−3, 1.4 μm, 1018 cm−3, and 1012 cm−2, and 1.45eV optimal values. The values were used to obtain an optimized value with the following performance; PCE = 24.33%, supported with FF of 87.34%, Jsc of 25.83 mA/cm2 and Voc of 1.08 V. The effect of series resistance, shunt resistance, work function of back contact, temperature and light intensity were evaluated. At higher work function (say WF = 5.9 eV for Se), a PCE of ∼30% was obtained with corresponding FF of ∼84 %, Jsc of ∼30 mA/cm2 and Voc of 1.2 V. By successfully controlling defect states and improving device performance through co-doping of the absorber layer, the results open the door for the design of an advanced, high-efficiency, and reasonably low PSC with HTL elimination.
{"title":"Defect control and performance optimization in Li+/Na+ Co-doped HTL-free Cs2AgBiBr6 double perovskite solar cells: Toward an efficient HTL-free architecture","authors":"E. Danladi , L.F. Koao , T.E. Motaung , S.V. Motloung","doi":"10.1016/j.jics.2026.102453","DOIUrl":"10.1016/j.jics.2026.102453","url":null,"abstract":"<div><div>The Cs<sub>2</sub>AgBiBr<sub>6</sub> double halide perovskite has catered for the problem related with lead toxicity and stability in perovskite solar cells (PSCs). Unfortunately, the unstable hole transport layer (HTL) such as spiro-OMeTAD, limited diffusion length of charge carriers, introduced interface defects, and inferior hole extraction capability results to poor performance. In this work, we presented, a simplified design and modeling of an improved stable HTL-free perovskite solar cells with Li<sup>+</sup> and Na<sup>+</sup> co-doped Cs<sub>2</sub>AgBiBr<sub>6</sub>-based absorber. Guided by solar capacitance simulation software (SCAPS-1D), this present work examined the performance of PSCs with both Cs<sub>2</sub>AgBiBr<sub>6</sub> and Cs<sub>1</sub><sub>·</sub><sub>96</sub>Li<sub>0</sub><sub>·</sub><sub>01</sub>Na<sub>0</sub><sub>·</sub><sub>03</sub>AgBiBr<sub>6</sub> absorbing material. The Cs<sub>2</sub>AgBiBr<sub>6</sub>-based device gave an open circuit voltage (<em>V</em><sub>oc</sub>), short circuit current density (<em>J</em><sub>sc</sub>), fill factor (FF) and power conversion efficiency (PCE) of 0.31V, 9.19 mA/cm<sup>2</sup>, 68.15% and 1.97%, while the Cs<sub>1</sub><sub>·</sub><sub>96</sub>Li<sub>0</sub><sub>·</sub><sub>01</sub>Na<sub>0</sub><sub>·</sub><sub>03</sub>AgBiBr<sub>6</sub> device presents 0.76 V, 10.53 mA/cm<sup>2</sup>, 70.54% and 5.63% as <em>V</em><sub>oc</sub>, <em>J</em><sub>sc</sub>, FF and PCE. This shows that Cs<sub>1</sub><sub>·</sub><sub>96</sub>Li<sub>0</sub><sub>·</sub><sub>01</sub>Na<sub>0</sub><sub>·</sub><sub>03</sub>AgBiBr<sub>6</sub>-based device was more promising. The performance of the FTO/TiO<sub>2</sub>/Cs<sub>1</sub><sub>·</sub><sub>96</sub>Li<sub>0</sub><sub>·</sub><sub>01</sub>Na<sub>0</sub><sub>·</sub><sub>03</sub>AgBiBr<sub>6</sub>/C device was optimized by varying the ETL thickness and doping concentration, perovskite thickness and doping concentration, perovskite defect density and band gap to obtain 0.02 μm, 10<sup>17</sup> cm<sup>−3</sup>, 1.4 μm, 10<sup>18</sup> cm<sup>−3</sup>, and 10<sup>12</sup> cm<sup>−2</sup>, and 1.45eV optimal values. The values were used to obtain an optimized value with the following performance; PCE = 24.33%, supported with FF of 87.34%, <em>J</em><sub>sc</sub> of 25.83 mA/cm<sup>2</sup> and <em>V</em><sub>oc</sub> of 1.08 V. The effect of series resistance, shunt resistance, work function of back contact, temperature and light intensity were evaluated. At higher work function (say <em>W</em><sub>F</sub> = 5.9 eV for Se), a PCE of ∼30% was obtained with corresponding FF of ∼84 %, <em>J</em><sub>sc</sub> of ∼30 mA/cm<sup>2</sup> and <em>V</em><sub>oc</sub> of 1.2 V. By successfully controlling defect states and improving device performance through co-doping of the absorber layer, the results open the door for the design of an advanced, high-efficiency, and reasonably low PSC with HTL elimination.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 3","pages":"Article 102453"},"PeriodicalIF":3.4,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081500","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 : 2026-01-28DOI: 10.1016/j.jics.2026.102452
Fatma İrem Şahin , Yiğitalp Okumuş , Nil Acaralı
The present study focused on the development and balanced in-range displacement optimization of multifunctional epoxy-based hybrid coatings reinforced with graphene, boron carbide, zinc borate, and organic fibers. A Box-Behnken experimental design was applied to evaluate the individual and interactive effects of additive ratios on displacement behaviour under three-point bending. The primary objective was to maintain stable mechanical performance by keeping displacement within an application driven target window rather than maximizing/minimizing a single metric. A total of 29 experimental runs were conducted with four variables at three levels. The optimum formulation was determined with nano additives as 0.5 wt% graphene, 0.5 wt% B4C, 1.0 wt% zinc borate, and 0.5 wt% organic fiber. The model showed high predictive reliability with R2 = 0.9926, adjusted R2 = 0.9852, and predicted R2 = 0.9685. Thermal analysis via TG-DTA demonstrated that the optimized coating exhibited a main degradation point at 317 °C. FT-IR analysis confirmed the chemical integration of the additives through characteristic peaks. SEM images showed a homogeneously dispersed microstructure with minimal agglomeration. These results indicated that the proposed composite system delivers balanced displacement within the target range while preserving load support and structural integrity, together with improved thermal stability, providing an opportunity for high performance engineering applications.
{"title":"Displacement behaviour in nano-modified epoxy coatings: A Box-Behnken approach","authors":"Fatma İrem Şahin , Yiğitalp Okumuş , Nil Acaralı","doi":"10.1016/j.jics.2026.102452","DOIUrl":"10.1016/j.jics.2026.102452","url":null,"abstract":"<div><div>The present study focused on the development and balanced in-range displacement optimization of multifunctional epoxy-based hybrid coatings reinforced with graphene, boron carbide, zinc borate, and organic fibers. A Box-Behnken experimental design was applied to evaluate the individual and interactive effects of additive ratios on displacement behaviour under three-point bending. The primary objective was to maintain stable mechanical performance by keeping displacement within an application driven target window rather than maximizing/minimizing a single metric. A total of 29 experimental runs were conducted with four variables at three levels. The optimum formulation was determined with nano additives as 0.5 wt% graphene, 0.5 wt% B<sub>4</sub>C, 1.0 wt% zinc borate, and 0.5 wt% organic fiber. The model showed high predictive reliability with R<sup>2</sup> = 0.9926, adjusted R<sup>2</sup> = 0.9852, and predicted R<sup>2</sup> = 0.9685. Thermal analysis via TG-DTA demonstrated that the optimized coating exhibited a main degradation point at 317 °C. FT-IR analysis confirmed the chemical integration of the additives through characteristic peaks. SEM images showed a homogeneously dispersed microstructure with minimal agglomeration. These results indicated that the proposed composite system delivers balanced displacement within the target range while preserving load support and structural integrity, together with improved thermal stability, providing an opportunity for high performance engineering applications.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 3","pages":"Article 102452"},"PeriodicalIF":3.4,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081498","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 : 2026-01-27DOI: 10.1016/j.jics.2026.102446
Boshen Wang, Jihong Fu, Jun Tang, Haipeng Zhang, Junli Yu, Qichao Wu, Mengdie Li
Sunflower seed meal is a rich source of chlorogenic acid (CGA). In this work, the conductor-like screening model for realistic solvation (COSMO-RS) was used to assist in identifying the optimal natural deep eutectic solvents (NADESs) for the extraction of CGA from the sunflower seed meal. A total of 20 hydrogen bond donors (HBDs) and 10 hydrogen bond acceptors (HBAs) at different molar ratios resulting in 600 NADESs were screened via the COSMO-RS model by calculating the infinite dilution activity coefficients of CGA. The results showed that the solvent composed of choline chloride (ChCl) and urea at a molar ratio of 2:1 had the highest extraction rate of 25.92 mg g−1 for CGA. Additionally, ChCl-Urea (2:1) was chosen as the solvent in response surface methodology (RSM) to optimize the microwave assisted NADES extraction parameters, including liquid-solid ratio, microwave power, temperature and irradiation time, yielding a CGA content of 26.39 mg g−1. Furthermore, the antioxidant activities of the CGA extract using NADES were determined, which exhibited better DPPH, ABTS radicals scavenging abilities and ferric reducing antioxidant power (FRAP). Therefore, COSMO-RS and RSM can serve as effective techniques for screening NADESs and optimizing extraction processes, thereby expanding the application potential of NADES in extracting various bioactive compounds.
{"title":"Microwave assisted extraction of chlorogenic acid from sunflower seed meal using natural deep eutectic solvent based on COSMO-RS design","authors":"Boshen Wang, Jihong Fu, Jun Tang, Haipeng Zhang, Junli Yu, Qichao Wu, Mengdie Li","doi":"10.1016/j.jics.2026.102446","DOIUrl":"10.1016/j.jics.2026.102446","url":null,"abstract":"<div><div>Sunflower seed meal is a rich source of chlorogenic acid (CGA). In this work, the conductor-like screening model for realistic solvation (COSMO-RS) was used to assist in identifying the optimal natural deep eutectic solvents (NADESs) for the extraction of CGA from the sunflower seed meal. A total of 20 hydrogen bond donors (HBDs) and 10 hydrogen bond acceptors (HBAs) at different molar ratios resulting in 600 NADESs were screened via the COSMO-RS model by calculating the infinite dilution activity coefficients of CGA. The results showed that the solvent composed of choline chloride (ChCl) and urea at a molar ratio of 2:1 had the highest extraction rate of 25.92 mg g<sup>−1</sup> for CGA. Additionally, ChCl-Urea (2:1) was chosen as the solvent in response surface methodology (RSM) to optimize the microwave assisted NADES extraction parameters, including liquid-solid ratio, microwave power, temperature and irradiation time, yielding a CGA content of 26.39 mg g<sup>−1</sup>. Furthermore, the antioxidant activities of the CGA extract using NADES were determined, which exhibited better DPPH, ABTS radicals scavenging abilities and ferric reducing antioxidant power (FRAP). Therefore, COSMO-RS and RSM can serve as effective techniques for screening NADESs and optimizing extraction processes, thereby expanding the application potential of NADES in extracting various bioactive compounds.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 3","pages":"Article 102446"},"PeriodicalIF":3.4,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081497","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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