Pub Date : 2025-12-21DOI: 10.1016/j.jics.2025.102371
Suman Kumar Maity , Rajasekar P
Two-component organogel was achieved from dipeptides containing non-proteinogenic p-amino benzoic acid (Paba) and 2-aminoisobutyric acid (Aib). Boc-Paba-Aib-OMe formed weak organogel alone, however, formed stable two-component organogel with Boc-Paba(Br)-Aib-OH in 1:1 M ratio. FE-SEM revealed microcrystalline structures from Boc-Paba-Aib-OMe, however, mature long entangled nanofibers were obtained from two component xerogel. No other peptide and peptide combinations, from the pool of six peptides, resulted any gelation indicating unique molecular recognition. X-ray crystallography of Boc-Paba-Aib-OMe revealed hydrogen bonded two-dimensional sheet like structure. The two-component gel served as a robust matrix for trapping a chemo-dosimeter, affording simple colorimetric cyanide sensing in gel state.
{"title":"Two-component organogel from halogenated peptide: A robust matrix for gel phase colorimetric cyanide sensing","authors":"Suman Kumar Maity , Rajasekar P","doi":"10.1016/j.jics.2025.102371","DOIUrl":"10.1016/j.jics.2025.102371","url":null,"abstract":"<div><div>Two-component organogel was achieved from dipeptides containing non-proteinogenic <em>p</em>-amino benzoic acid (Paba) and 2-aminoisobutyric acid (Aib). Boc-Paba-Aib-OMe formed weak organogel alone, however, formed stable two-component organogel with Boc-Paba(Br)-Aib-OH in 1:1 M ratio. FE-SEM revealed microcrystalline structures from Boc-Paba-Aib-OMe, however, mature long entangled nanofibers were obtained from two component xerogel. No other peptide and peptide combinations, from the pool of six peptides, resulted any gelation indicating unique molecular recognition. X-ray crystallography of Boc-Paba-Aib-OMe revealed hydrogen bonded two-dimensional sheet like structure. The two-component gel served as a robust matrix for trapping a chemo-dosimeter, affording simple colorimetric cyanide sensing in gel state.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102371"},"PeriodicalIF":3.4,"publicationDate":"2025-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837462","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}
ZnO–Bi2S3 heterojunction was prepared using different molar concentrations of Bi2S3 (0.5, 1.0, and 1.5 M) by microwave irradiation method to enhance the photocatalytic activity under visible light irradiation. XRD analysis confirms that ZnO and Bi2S3 exhibit in hexagonal (wurtzite) and orthorhombic phases, respectively. SEM analysis revealed the morphological variations due to the variations of Bi2S3 molar concentrations. ZnO–Bi2S3 (1.0 M) heterojunction exhibited nano-fence-like morphology. The EDS analysis confirms the presence of Zn, O, Bi, and S elements. Further, the confirmation of ZnO–Bi2S3 heterojunction formation was analyzed via FEG-TEM and XPS results. The UV–visible diffuse reflectance spectrum and PL results revealed that the increasing Bi2S3 ratio in the ZnO–Bi2S3 heterojunction could improve the visible light response and suppress the rate of exciton recombination, respectively. EIS results show that the ZnO–Bi2S3 (1.0 M) exhibited the lowest electron transfer resistance among the other samples. The ZnO–Bi2S3(1.0 M) provides efficient aniline degradation under solar light irradiation due to the efficient visible light absorptions and lower photo-generated charge carrier recombination. In addition, ZnO–Bi2S3 heterojunction exhibited good stability in organic pollutants degradation up to 5 cycles.
{"title":"One-pot synthesis of ZnO–Bi2S3 heterojunction for organic pollutant elimination under visible light irradiation","authors":"Mano Ganapathy , Subramanian Sakthinathan , Chang-Tang Chang , Viswanathan Alagan","doi":"10.1016/j.jics.2025.102357","DOIUrl":"10.1016/j.jics.2025.102357","url":null,"abstract":"<div><div>ZnO–Bi<sub>2</sub>S<sub>3</sub> heterojunction was prepared using different molar concentrations of Bi<sub>2</sub>S<sub>3</sub> (0.5, 1.0, and 1.5 M) by microwave irradiation method to enhance the photocatalytic activity under visible light irradiation. XRD analysis confirms that ZnO and Bi<sub>2</sub>S<sub>3</sub> exhibit in hexagonal (wurtzite) and orthorhombic phases, respectively. SEM analysis revealed the morphological variations due to the variations of Bi<sub>2</sub>S<sub>3</sub> molar concentrations. ZnO–Bi<sub>2</sub>S<sub>3</sub> (1.0 M) heterojunction exhibited nano-fence-like morphology. The EDS analysis confirms the presence of Zn, O, Bi, and S elements. Further, the confirmation of ZnO–Bi<sub>2</sub>S<sub>3</sub> heterojunction formation was analyzed via FEG-TEM and XPS results. The UV–visible diffuse reflectance spectrum and PL results revealed that the increasing Bi<sub>2</sub>S<sub>3</sub> ratio in the ZnO–Bi<sub>2</sub>S<sub>3</sub> heterojunction could improve the visible light response and suppress the rate of exciton recombination, respectively. EIS results show that the ZnO–Bi<sub>2</sub>S<sub>3</sub> (1.0 M) exhibited the lowest electron transfer resistance among the other samples. The ZnO–Bi<sub>2</sub>S<sub>3</sub>(1.0 M) provides efficient aniline degradation under solar light irradiation due to the efficient visible light absorptions and lower photo-generated charge carrier recombination. In addition, ZnO–Bi<sub>2</sub>S<sub>3</sub> heterojunction exhibited good stability in organic pollutants degradation up to 5 cycles.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102357"},"PeriodicalIF":3.4,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837450","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 : 2025-12-18DOI: 10.1016/j.jics.2025.102356
Abderrahmane Selmani , Kaouther Kerboua
The present study provides a comprehensive experimental assessment of an asymmetric zero-gap Proton Exchange Membrane (PEM) electrolyzer, with the objective of assessing the kinetic-energetic balance during hydrogen production, supported by mechanistic insights. A semi-pilot 5-cell stack equipped with a Nafion 117 membrane was evaluated through transient analysis, polarization segmentation, and a multi-parameter study including voltage (9.5–13.25 V), temperature (26.8–66 °C), electrolyte flow rate (50–1500 mL/min), and water quality (distilled, bi-distilled, fresh and stored reverse osmosis permeate). The optimal operating point was found at 11.5 V, yielding a peak Faradaic efficiency of 96.56 % and an energy efficiency of 62.28 %. Elevated temperatures significantly enhanced current density (more than 100 % increase across a 40 °C rise) but reduced energy efficiency due to increased ohmic losses. Surprisingly, fresh reverse osmosis permeate outperformed bi-distilled water, attributed to its balanced ionic conductivity and improved bubble detachment dynamics at the electrode-electrolyte interface. The mechanistic analysis revealed a fundamental trade-off, increasing current density accelerates hydrogen production but steeply reduces energy efficiency. These findings highlight the critical interplay between voltage, temperature, water quality, and ohmic resistance in optimizing asymmetric zero-gap PEM electrolyzers. The study provides practical guidelines for future design and operation of high-efficiency hydrogen generation systems.
{"title":"Asymmetric zero-gap electrolysis for hydrogen production: A comprehensive experimental assessment of the kinetic-energetic balance","authors":"Abderrahmane Selmani , Kaouther Kerboua","doi":"10.1016/j.jics.2025.102356","DOIUrl":"10.1016/j.jics.2025.102356","url":null,"abstract":"<div><div>The present study provides a comprehensive experimental assessment of an asymmetric zero-gap Proton Exchange Membrane (PEM) electrolyzer, with the objective of assessing the kinetic-energetic balance during hydrogen production, supported by mechanistic insights. A semi-pilot 5-cell stack equipped with a Nafion 117 membrane was evaluated through transient analysis, polarization segmentation, and a multi-parameter study including voltage (9.5–13.25 V), temperature (26.8–66 °C), electrolyte flow rate (50–1500 mL/min), and water quality (distilled, bi-distilled, fresh and stored reverse osmosis permeate). The optimal operating point was found at 11.5 V, yielding a peak Faradaic efficiency of 96.56 % and an energy efficiency of 62.28 %. Elevated temperatures significantly enhanced current density (more than 100 % increase across a 40 °C rise) but reduced energy efficiency due to increased ohmic losses. Surprisingly, fresh reverse osmosis permeate outperformed bi-distilled water, attributed to its balanced ionic conductivity and improved bubble detachment dynamics at the electrode-electrolyte interface. The mechanistic analysis revealed a fundamental trade-off, increasing current density accelerates hydrogen production but steeply reduces energy efficiency. These findings highlight the critical interplay between voltage, temperature, water quality, and ohmic resistance in optimizing asymmetric zero-gap PEM electrolyzers. The study provides practical guidelines for future design and operation of high-efficiency hydrogen generation systems.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102356"},"PeriodicalIF":3.4,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837452","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 : 2025-12-18DOI: 10.1016/j.jics.2025.102353
Namrata Tripathy, Subhasmita Swain, Tapash R. Rautray
Titanium implants require surface modification to enhance life expectancy and reduce the rejection rate in the human body. Hydroxyapatite coating on titanium implants is considered a promising approach to enhance the biological activity of metallic implants; however, it has limited bonding strength and is susceptible to bacterial infection. Integrating zirconia and silver into the hydroxyapatite coating can be a distinctive choice to improve the implant's mechanical strength and antibacterial effect. The current study represents the ingenuity of double-layer deposition of zirconium oxide and silver-incorporated hydroxyapatite via the two-step cathodic electrodeposition technique with varying deposition times. All the post-synthesis treatments were performed with different characterizations. Results unveiled that the double-layer coating of zirconia-hydroxyapatite-silver on a titanium substrate achieved excellent cellular attachment, bonding strength, mechanical strength, lower cytotoxicity, and better antibacterial performance. This work highlights the potential of novel multi-layer coating on titanium substrate, with prolonged cathodization time showing better results.
{"title":"Double layer electrodeposition of silver doped Hydroxyapatite-Zirconia on Titanium metal plate","authors":"Namrata Tripathy, Subhasmita Swain, Tapash R. Rautray","doi":"10.1016/j.jics.2025.102353","DOIUrl":"10.1016/j.jics.2025.102353","url":null,"abstract":"<div><div>Titanium implants require surface modification to enhance life expectancy and reduce the rejection rate in the human body. Hydroxyapatite coating on titanium implants is considered a promising approach to enhance the biological activity of metallic implants; however, it has limited bonding strength and is susceptible to bacterial infection. Integrating zirconia and silver into the hydroxyapatite coating can be a distinctive choice to improve the implant's mechanical strength and antibacterial effect. The current study represents the ingenuity of double-layer deposition of zirconium oxide and silver-incorporated hydroxyapatite via the two-step cathodic electrodeposition technique with varying deposition times. All the post-synthesis treatments were performed with different characterizations. Results unveiled that the double-layer coating of zirconia-hydroxyapatite-silver on a titanium substrate achieved excellent cellular attachment, bonding strength, mechanical strength, lower cytotoxicity, and better antibacterial performance. This work highlights the potential of novel multi-layer coating on titanium substrate, with prolonged cathodization time showing better results.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102353"},"PeriodicalIF":3.4,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798356","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 : 2025-12-17DOI: 10.1016/j.jics.2025.102359
B. Sakthi Devi , S. Jayanthi , Indra Sulania
Biodegradable poly(vinyl alcohol) (PVA)-based nanocomposite films embedded with Zinc oxide (ZnO) nanoparticles (2–10 wt%) were fabricated via a facile solution casting method. Scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS) analysis confirmed the dispersion of nanoparticles and their elemental distribution. The optical behaviour and UV-shielding performance of the PVA-ZnO nanocomposite films were evaluated using UV–visible (UV–Vis) spectroscopy. Optical analysis revealed that, compared to pure PVA, the addition of 10 wt% ZnO nanoparticles resulted in a significant reduction in both direct and indirect band gaps, from 4.06 eV to 2.97 eV and from 3.80 eV to 2.24 eV, respectively. High thermal emissivity and wavelength-dependent sheet resistance indicate strong potential for passive radiative cooling, supported by preliminary cooling tests. Films with 10 wt% ZnO blocked 96 % UV-B and 97 % UV-A, with high ultraviolet protecting factor (UPF) values. Sunlight exposure tests further demonstrated the effective UV-shielding performance. DSC analysis showed increased Tg and Tm values, reflecting improved thermal stability. FTIR confirmed the interactions between ZnO nanoparticles and the PVA matrix. Mechanical testing provided tensile strength, elongation at break, and Young's modulus values. Statistical analysis was conducted to ensure the reliability of the experimental data.
{"title":"Fabrication of PVA/ZnO polymer nanocomposite films with dual assessment of UV shielding performance","authors":"B. Sakthi Devi , S. Jayanthi , Indra Sulania","doi":"10.1016/j.jics.2025.102359","DOIUrl":"10.1016/j.jics.2025.102359","url":null,"abstract":"<div><div>Biodegradable poly(vinyl alcohol) (PVA)-based nanocomposite films embedded with Zinc oxide (ZnO) nanoparticles (2–10 wt%) were fabricated via a facile solution casting method. Scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS) analysis confirmed the dispersion of nanoparticles and their elemental distribution. The optical behaviour and UV-shielding performance of the PVA-ZnO nanocomposite films were evaluated using UV–visible (UV–Vis) spectroscopy. Optical analysis revealed that, compared to pure PVA, the addition of 10 wt% ZnO nanoparticles resulted in a significant reduction in both direct and indirect band gaps, from 4.06 eV to 2.97 eV and from 3.80 eV to 2.24 eV, respectively. High thermal emissivity and wavelength-dependent sheet resistance indicate strong potential for passive radiative cooling, supported by preliminary cooling tests. Films with 10 wt% ZnO blocked 96 % UV-B and 97 % UV-A, with high ultraviolet protecting factor (UPF) values. Sunlight exposure tests further demonstrated the effective UV-shielding performance. DSC analysis showed increased T<sub>g</sub> and T<sub>m</sub> values, reflecting improved thermal stability. FTIR confirmed the interactions between ZnO nanoparticles and the PVA matrix. Mechanical testing provided tensile strength, elongation at break, and Young's modulus values. Statistical analysis was conducted to ensure the reliability of the experimental data.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102359"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798300","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 : 2025-12-17DOI: 10.1016/j.jics.2025.102360
Reem Hilal Almamari, Geetha Devi, Safiya Mohammed Hamdan Al Rubaii, Sara Badar Nasser Mohammed Al Jassasi, AAisha AAmir Mohammed Amur Al Ghaithi, Ragavesh Dhandapani
The worldwide production of waste aluminum foil has touched almost 80 Mt (Million tons) during the year 2023 and it is expected to reach up to 110 Mt by the end of 2040. The disposal of used aluminium foils into landfills generates severe environmental distress. The possible way to manage the discarded aluminum foil is to reprocess it by transforming into value added product thereby reducing the environmental impact. The environmentally friendly extraction of alumina nano powder from waste aluminum foil is an economically viable and promising alternative to aluminium. Hence, this research attempted an innovative and sustainable approach to reprocess the waste aluminium foil and transforming into alumina (Al2O3) nano powder through a facile, green, and eco-friendly process. The extraction of alumina was performed by green extraction technique using citric acid and glycerol as green solvents. The final product was characterized using Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray analysis (EDX), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD). The resulting nano alumina powder was successfully applied in the antibacterial activity studies against Escherichia coli by agar disk-diffusion method and it was noted that the nano alumina exhibited antibacterial efficacy against Escherichia coli. This novel research offers a clean environment by reducing the waste and enhancing resource efficiency ensuring alignment with global sustainability goals and circular economy.
{"title":"Eco-friendly extraction of nano alumina from aluminium foil: Characterization and antibacterial study","authors":"Reem Hilal Almamari, Geetha Devi, Safiya Mohammed Hamdan Al Rubaii, Sara Badar Nasser Mohammed Al Jassasi, AAisha AAmir Mohammed Amur Al Ghaithi, Ragavesh Dhandapani","doi":"10.1016/j.jics.2025.102360","DOIUrl":"10.1016/j.jics.2025.102360","url":null,"abstract":"<div><div>The worldwide production of waste aluminum foil has touched almost 80 Mt (Million tons) during the year 2023 and it is expected to reach up to 110 Mt by the end of 2040. The disposal of used aluminium foils into landfills generates severe environmental distress. The possible way to manage the discarded aluminum foil is to reprocess it by transforming into value added product thereby reducing the environmental impact. The environmentally friendly extraction of alumina nano powder from waste aluminum foil is an economically viable and promising alternative to aluminium. Hence, this research attempted an innovative and sustainable approach to reprocess the waste aluminium foil and transforming into alumina (Al<sub>2</sub>O<sub>3</sub>) nano powder through a facile, green, and eco-friendly process. The extraction of alumina was performed by green extraction technique using citric acid and glycerol as green solvents. The final product was characterized using Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray analysis (EDX), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD). The resulting nano alumina powder was successfully applied in the antibacterial activity studies against <em>Escherichia coli</em> by agar disk-diffusion method and it was noted that the nano alumina exhibited antibacterial efficacy against <em>Escherichia coli.</em> This novel research offers a clean environment by reducing the waste and enhancing resource efficiency ensuring alignment with global sustainability goals and circular economy.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102360"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798358","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}
Polyethylene terephthalate (PET) microplastics (≤5 mm) increasingly pollute aquatic and terrestrial environments, posing a toxicological risk such as growth disruption, metabolic disorders, and neuro-developmental delays. This study presents the detailed characterization of TiO2 & TiO2/Cadmium (Cd) doped nano-rod based photocatalyst for PET degradation using an advanced oxidation treatment. Engineered TiO2 & Cd-doped TiO2 semiconductor photocatalyst were synthesized via a hydrothermal-assisted/wet impregnation method. The resulting nano-rod were characterized to examine the physico-chemical, morphological and optical properties using different analytical techniques and degradation were assessed via carbonyl index analysis using Fourier transform infrared spectroscopy. TiO2/Cd doped nano-photocatalyst synthesized at a relatively low temperature (<200 °C) with average uniform particle size of 22.51 nm, demonstrated superior PET degradation efficiency of 15 ± 0.98 % over 80 h of irradiation period at pH 5. This represents a significant improvement compared to pure TiO2, which achieved only 10 ± 0.5 % degradation, attributed due to reduction in bandgap caused by cadmium doping, which improves photocatalytic activity through functionalization effects. This research underscores the potential of structured semiconductor material for effective Polyethylene terephthalate (PET) microplastic degradation from aqueous environment and highlights their role in advancing sustainable environmental remediation strategies.
{"title":"Hydrothermal-assisted synthesis of TiO2 and Cd-doped TiO2 elongated nanorods for hydrolytic degradation of polyethylene terephthalate microplastics via advanced oxidation processes","authors":"Shafeeq Suhail Mohamed Shajidha , Surekhaa Sudha Thiyagarajan , Anbarasi Karunanithi","doi":"10.1016/j.jics.2025.102352","DOIUrl":"10.1016/j.jics.2025.102352","url":null,"abstract":"<div><div>Polyethylene terephthalate (PET) microplastics (≤5 mm) increasingly pollute aquatic and terrestrial environments, posing a toxicological risk such as growth disruption, metabolic disorders, and neuro-developmental delays. This study presents the detailed characterization of TiO<sub>2</sub> & TiO<sub>2</sub>/Cadmium (Cd) doped nano-rod based photocatalyst for PET degradation using an advanced oxidation treatment. Engineered TiO<sub>2</sub> & Cd-doped TiO<sub>2</sub> semiconductor photocatalyst were synthesized via a hydrothermal-assisted/wet impregnation method. The resulting nano-rod were characterized to examine the physico-chemical, morphological and optical properties using different analytical techniques and degradation were assessed via carbonyl index analysis using Fourier transform infrared spectroscopy. TiO<sub>2</sub>/Cd doped nano-photocatalyst synthesized at a relatively low temperature (<200 °C) with average uniform particle size of 22.51 nm, demonstrated superior PET degradation efficiency of 15 ± 0.98 % over 80 h of irradiation period at p<sup>H</sup> 5. This represents a significant improvement compared to pure TiO<sub>2</sub>, which achieved only 10 ± 0.5 % degradation, attributed due to reduction in bandgap caused by cadmium doping, which improves photocatalytic activity through functionalization effects. This research underscores the potential of structured semiconductor material for effective Polyethylene terephthalate (PET) microplastic degradation from aqueous environment and highlights their role in advancing sustainable environmental remediation strategies.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102352"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837786","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 : 2025-12-17DOI: 10.1016/j.jics.2025.102361
Hajo Idriss , Khalid H. Ibnaouf , Osamah Aldaghri , Abbas I. Alakhras , M.A. Ibrahem , Abuzar Albadri , Mukhtar Ismail , A. Modwi
ZnO@SnO2@ZrO2 nanocomposite was synthesized via a mechanochemical method and evaluated for Pb2+ ion removal from aqueous solutions under varying initial concentrations, pH levels, and contact times. Structural and surface characteristics were confirmed by XRD, FTIR, XPS, BET, and SEM/EDX analysis. The nanocomposite maintained high adsorption efficiencies across the tested concentration range, from 85.10 % at 15 mg/L to 94.14 % at 200 mg/L, with a similar value of 92.33 % in a separate trial. Removal efficiency increased with pH, rising from 18 % at pH 1–61 % at pH 8, highlighting the competitive effect of H+ ions at lower pH. Adsorption occurred rapidly, reaching 82.83 % within 5 min and nearly 99 % at equilibrium. Isotherm analysis indicated that the Langmuir model best fit the data (R2 = 0.9423), with a maximum adsorption capacity (Qmax) of 280.68 mg/g, whereas the Freundlich model (R2 = 0.9075) suggested heterogeneous surface sites. Kinetic modeling indicated that the pseudo-first-order model (R2 = 0.9722) best described the adsorption mechanism, implying that physisorption is the dominant process. The nanocomposite exhibited good reusability, with adsorption efficiency decreasing from 99.4 % in the first cycle to 85.7 % after five cycles. These results demonstrate that the ZnO@SnO2@ZrO2 nanocomposite possesses high stability, substantial adsorption capacity, and strong potential as a sorbent for Pb2+ removal in water treatment applications.
{"title":"Pulling down Pb2+ from aqueous media through ZnO@SnO2@ZrO2 nanocomposite","authors":"Hajo Idriss , Khalid H. Ibnaouf , Osamah Aldaghri , Abbas I. Alakhras , M.A. Ibrahem , Abuzar Albadri , Mukhtar Ismail , A. Modwi","doi":"10.1016/j.jics.2025.102361","DOIUrl":"10.1016/j.jics.2025.102361","url":null,"abstract":"<div><div>ZnO@SnO<sub>2</sub>@ZrO<sub>2</sub> nanocomposite was synthesized via a mechanochemical method and evaluated for Pb<sup>2+</sup> ion removal from aqueous solutions under varying initial concentrations, pH levels, and contact times. Structural and surface characteristics were confirmed by XRD, FTIR, XPS, BET, and SEM/EDX analysis. The nanocomposite maintained high adsorption efficiencies across the tested concentration range, from 85.10 % at 15 mg/L to 94.14 % at 200 mg/L, with a similar value of 92.33 % in a separate trial. Removal efficiency increased with pH, rising from 18 % at pH 1–61 % at pH 8, highlighting the competitive effect of H<sup>+</sup> ions at lower pH. Adsorption occurred rapidly, reaching 82.83 % within 5 min and nearly 99 % at equilibrium. Isotherm analysis indicated that the Langmuir model best fit the data (R<sup>2</sup> = 0.9423), with a maximum adsorption capacity (Q<sub>max</sub>) of 280.68 mg/g, whereas the Freundlich model (R<sup>2</sup> = 0.9075) suggested heterogeneous surface sites. Kinetic modeling indicated that the pseudo-first-order model (R<sup>2</sup> = 0.9722) best described the adsorption mechanism, implying that physisorption is the dominant process. The nanocomposite exhibited good reusability, with adsorption efficiency decreasing from 99.4 % in the first cycle to 85.7 % after five cycles. These results demonstrate that the ZnO@SnO<sub>2</sub>@ZrO<sub>2</sub> nanocomposite possesses high stability, substantial adsorption capacity, and strong potential as a sorbent for Pb<sup>2+</sup> removal in water treatment applications.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102361"},"PeriodicalIF":3.4,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837463","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}
This work explores the morphological properties of electrospun ultrafine polyamide 6 (PA6) nanofiber membranes developed through pilot-scale solution electro-blowing techniques. Field Emission Scanning Electron Microscopy (FESEM) indicates the nanofibers homogeneity and ultrafine structure, while Energy Dispersive X-ray Spectroscopy (EDX) confirms their elemental composition and distribution. The FESEM study reveals a uniform fiber diameter and smooth surface morphology, indicating high-quality nanofiber production. EDX analysis confirms the presence of key elements, ensuring the compositional integrity of PA6. These findings highlight the superiority of electro-blowing over electrospinning in producing high-performance nanofiber membranes suitable for a wide range of applications, including battery separators and filtration systems.
{"title":"Morphological characterization of ultrafine polyamide 6 nanofiber membranes developed by pilot-scale solution electro-blowing techniques","authors":"Abrar Ahamad, Gaurav Tiwari, Durvijay Singh, Ravindra Kumar, Sandip Patil","doi":"10.1016/j.jics.2025.102362","DOIUrl":"10.1016/j.jics.2025.102362","url":null,"abstract":"<div><div>This work explores the morphological properties of electrospun ultrafine polyamide 6 (PA6) nanofiber membranes developed through pilot-scale solution electro-blowing techniques. Field Emission Scanning Electron Microscopy (FESEM) indicates the nanofibers homogeneity and ultrafine structure, while Energy Dispersive X-ray Spectroscopy (EDX) confirms their elemental composition and distribution. The FESEM study reveals a uniform fiber diameter and smooth surface morphology, indicating high-quality nanofiber production. EDX analysis confirms the presence of key elements, ensuring the compositional integrity of PA6. These findings highlight the superiority of electro-blowing over electrospinning in producing high-performance nanofiber membranes suitable for a wide range of applications, including battery separators and filtration systems.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102362"},"PeriodicalIF":3.4,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798298","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 : 2025-12-16DOI: 10.1016/j.jics.2025.102358
Zhong Ma , Shunwei Li , Jinbin Cai
Chemical looping gasification (CLG) presents a promising route for efficient coal to syngas conversion. The development of high performance oxygen carriers (OCs) is crucial. This study investigates Ni-doped SrFeO3 (SrFe1-xNixO3, x = 0.0, 0.05, 0.1, 0.15) perovskite oxides as novel OCs for coal CLG. Materials synthesized via sol-gel combustion were characterized (XRD, SEM-EDS, H2-TPR, XPS) and evaluated in a fixed-bed reactor for lignite CLG. SrFe0.9Ni0.1O3-δ (SFN10) exhibited superior performance. Enhanced oxygen mobility facilitated rapid coal devolatilization and char conversion. SFN10 achieved the highest carbon conversion (88.6 %), significantly higher than undoped SrFeO3 (69.8 %). Critically, SFN10 promoted highly selective syngas production (>84 %) by tailoring lattice oxygen donation. Ten consecutive redox cycles demonstrated excellent reactivity stability and minimal particle sintering. Density Functional Theory (DFT) calculations revealed that Ni doping reduces oxygen vacancy formation energy, promoting lattice oxygen reactivity. These findings establish Ni-doped SrFeO3 as a highly effective and stable OC for advanced coal CLG towards high purity syngas.
{"title":"Enhanced syngas production from coal chemical looping gasification using Ni-doped SrFeO3 oxygen carriers","authors":"Zhong Ma , Shunwei Li , Jinbin Cai","doi":"10.1016/j.jics.2025.102358","DOIUrl":"10.1016/j.jics.2025.102358","url":null,"abstract":"<div><div>Chemical looping gasification (CLG) presents a promising route for efficient coal to syngas conversion. The development of high performance oxygen carriers (OCs) is crucial. This study investigates Ni-doped SrFeO<sub>3</sub> (SrFe<sub>1-x</sub>Ni<sub>x</sub>O<sub>3</sub>, x = 0.0, 0.05, 0.1, 0.15) perovskite oxides as novel OCs for coal CLG. Materials synthesized via sol-gel combustion were characterized (XRD, SEM-EDS, H<sub>2</sub>-TPR, XPS) and evaluated in a fixed-bed reactor for lignite CLG. SrFe<sub>0.9</sub>Ni<sub>0.1</sub>O<sub>3-δ</sub> (SFN10) exhibited superior performance. Enhanced oxygen mobility facilitated rapid coal devolatilization and char conversion. SFN10 achieved the highest carbon conversion (88.6 %), significantly higher than undoped SrFeO<sub>3</sub> (69.8 %). Critically, SFN10 promoted highly selective syngas production (>84 %) by tailoring lattice oxygen donation. Ten consecutive redox cycles demonstrated excellent reactivity stability and minimal particle sintering. Density Functional Theory (DFT) calculations revealed that Ni doping reduces oxygen vacancy formation energy, promoting lattice oxygen reactivity. These findings establish Ni-doped SrFeO<sub>3</sub> as a highly effective and stable OC for advanced coal CLG towards high purity syngas.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"103 1","pages":"Article 102358"},"PeriodicalIF":3.4,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798357","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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