Environmental pollution, particularly from organic dye-laden wastewater, represents an escalating global challenge, necessitating the development of efficient and sustainable remediation strategies. Herein, we report the fabrication of a rare-earth element Yb-doped TiO2/g-C3N5 (YTCN) heterostructured photocatalyst through hydrothermal synthesis and calcination, utilizing methylene blue (MB) and rhodamine B (RhB) as representative contaminants. The YTCN composite with an optimized mass ratio of 1:3 exhibited superior photocatalytic degradation efficiencies of 96.57 % for MB and 91.82 % for RhB with a decline rate of 0.02083 and 0.01832 min−1 under 500 W xenon lamp irradiation within 105 min, corresponding to 2.2-fold and 2.1-fold improvements over pristine TiO2, respectively. The Construction of YTCN significantly enhances photocatalytic efficiency by enhancing the separation of charge carriers, extending light absorption into the visible region, and improving overall catalytic activity. This performance enhancement is ascribed to the cooperative interactions among Yb, TiO2, and CN, which raise charge generation, division, and carriage dynamics of photoinduced electrons (e−) and holes (h+). Furthermore, the YTCN composite demonstrated excellent recyclability and structural stability, remained close to 90 % degradation efficiency after five consecutive cycles without notable crystal degradation. These results highlight the potential of YTCN heterostructures as low-cost and robust photocatalysts for advanced wastewater treatment applications.
{"title":"Synergistic effects of rare-metal ytterbium doping on TiO2/g-C3N5 heterostructures for enhanced photocatalytic degradation of methylene blue","authors":"Hui Bai, Runwen Xiong, Nan Wang, Mingxia Tian, Jianbo Zhao, Fengqin Tang, Jianhui Jiang","doi":"10.1016/j.inoche.2025.114159","DOIUrl":"10.1016/j.inoche.2025.114159","url":null,"abstract":"<div><div>Environmental pollution, particularly from organic dye-laden wastewater, represents an escalating global challenge, necessitating the development of efficient and sustainable remediation strategies. Herein, we report the fabrication of a rare-earth element Yb-doped TiO<sub>2</sub>/g-C<sub>3</sub>N<sub>5</sub> (YTCN) heterostructured photocatalyst through hydrothermal synthesis and calcination, utilizing methylene blue (MB) and rhodamine B (RhB) as representative contaminants. The YTCN composite with an optimized mass ratio of 1:3 exhibited superior photocatalytic degradation efficiencies of 96.57 % for MB and 91.82 % for RhB with a decline rate of 0.02083 and 0.01832 min<sup>−1</sup> under 500 W xenon lamp irradiation within 105 min, corresponding to 2.2-fold and 2.1-fold improvements over pristine TiO<sub>2</sub>, respectively. The Construction of YTCN significantly enhances photocatalytic efficiency by enhancing the separation of charge carriers, extending light absorption into the visible region, and improving overall catalytic activity. This performance enhancement is ascribed to the cooperative interactions among Yb, TiO<sub>2</sub>, and CN, which raise charge generation, division, and carriage dynamics of photoinduced electrons (e<sup>−</sup>) and holes (h<sup>+</sup>). Furthermore, the YTCN composite demonstrated excellent recyclability and structural stability, remained close to 90 % degradation efficiency after five consecutive cycles without notable crystal degradation. These results highlight the potential of YTCN heterostructures as low-cost and robust photocatalysts for advanced wastewater treatment applications.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114159"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current study reports a cost-effective hydrothermal method for binder-less synthesis of manganese oxide (Mn3O4) nanostructures on flexible stainless steel (SS) substrates, expected to enhance electrochemical performance for supercapacitor (SC) applications. By optimizing Mn molar concentrations, the Mn3O4 film (MO) with a 3 M concentration formed a porous structure with cauliflower-like morphology, beneficial for energy storage in aqueous electrolytes. Physicochemical characterization is used for the analysis of the MO samples. The electrode MO-0.3 exhibited a specific capacity of 1211C g−1 at 0.99 A g−1. An aqueous symmetric device (MO-0.3//KOH//MO-0.3 ASD) demonstrated a specific capacitance of 120.23F g−1, a specific energy of 16.77 Wh kg−1, and a specific power of 247.52 W kg−1, with ∽89 % capacitance retention after 5000 cycles. These findings underscore the potential of MO electrodes for high-performance electrochemical energy storage, showcasing the efficacy of this material in supercapacitor applications.
{"title":"Influence of molar concentration on the morphology and electrochemical performance of binder-free Mn3O4 thin films in aqueous symmetrical supercapacitors","authors":"P.S. Naik , R.S. Redekar , J.V. Kamble , S.V. Sadavar , N.L. Tarwal , S.-Y. Lee , S.J. Park , M.M. Karanjkar , P.D. Kamble","doi":"10.1016/j.inoche.2025.114207","DOIUrl":"10.1016/j.inoche.2025.114207","url":null,"abstract":"<div><div>The current study reports a cost-effective hydrothermal method for binder-less synthesis of manganese oxide (Mn<sub>3</sub>O<sub>4</sub>) nanostructures on flexible stainless steel (SS) substrates, expected to enhance electrochemical performance for supercapacitor (SC) applications. By optimizing Mn molar concentrations, the Mn<sub>3</sub>O<sub>4</sub> film (MO) with a 3 M concentration formed a porous structure with cauliflower-like morphology, beneficial for energy storage in aqueous electrolytes. Physicochemical characterization is used for the analysis of the MO samples. The electrode MO-0.3 exhibited a specific capacity of 1211C g<sup>−1</sup> at 0.99 A g<sup>−1</sup>. An aqueous symmetric device (MO-0.3//KOH//MO-0.3 ASD) demonstrated a specific capacitance of 120.23F g<sup>−1</sup>, a specific energy of 16.77 Wh kg<sup>−1</sup>, and a specific power of 247.52 W kg<sup>−1</sup>, with ∽89 % capacitance retention after 5000 cycles. These findings underscore the potential of MO electrodes for high-performance electrochemical energy storage, showcasing the efficacy of this material in supercapacitor applications.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"176 ","pages":"Article 114207"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.inoche.2025.114206
K.S.G. Jagan , S. Surendhiran , S. Savitha , T.M. Naren Vidaarth , A. Karthik , N. Lenin , R. Senthilmurugan
This research endeavors to synthesize nickel oxide nanoparticles (NiO NPs) using a sonochemical process facilitated by a nitrate precursor and alkaline sodium hydroxide (NaOH). In parallel, carbon dots (CDs) were derived from lemon waste peels via a facile hydrothermal method. Subsequently, the reflux method fabricated nickel oxide- carbon dot nanocomposite (NiO/CDs) in a 5:1 ratio. The structural properties, including crystallography, crystallinity, particle size, and morphology, were comprehensively characterized using X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The synthesized nanoparticles exhibit excellent dispersion, with mean particle sizes of approximately 36.46 nm for NiO NPs and 2.17 nm for carbon dots. The carbon dots defect ratio (ID/IG) characteristics feature was estimated as 0.94 using Raman spectroscopy. NiO, CDs, and NiO/CDs nanocomposite coating were developed using a doctor blade method on the EN3 mild steel specimens. Electrochemical impedance spectroscopy was conducted in marine water conditions with 3.5 wt% of NaCl and seawater to evaluate the stability of the nanostructured coating. Electrochemical analysis, such as the Nyquist plot, Tafel plot, and frequency response finding, demonstrated that NiO/CDs nanocomposite coating has enhanced corrosion protection in 3.5 wt% NaCl solution compares to seawater medium. These findings underscore the potential of the NiO/CDs nanostructured coating to extend the lifespan of industrial mild steel (EN3) specimens in seawater environments.
{"title":"Hybrid NiO nano rods-quantum carbon dots composites as a novel corrosion protective coating on EN3 mild steel in the marine environment","authors":"K.S.G. Jagan , S. Surendhiran , S. Savitha , T.M. Naren Vidaarth , A. Karthik , N. Lenin , R. Senthilmurugan","doi":"10.1016/j.inoche.2025.114206","DOIUrl":"10.1016/j.inoche.2025.114206","url":null,"abstract":"<div><div>This research endeavors to synthesize nickel oxide nanoparticles (NiO NPs) using a sonochemical process facilitated by a nitrate precursor and alkaline sodium hydroxide (NaOH). In parallel, carbon dots (CDs) were derived from lemon waste peels via a facile hydrothermal method. Subsequently, the reflux method fabricated nickel oxide- carbon dot nanocomposite (NiO/CDs) in a 5:1 ratio. The structural properties, including crystallography, crystallinity, particle size, and morphology, were comprehensively characterized using X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The synthesized nanoparticles exhibit excellent dispersion, with mean particle sizes of approximately 36.46 nm for NiO NPs and 2.17 nm for carbon dots. The carbon dots defect ratio (ID/IG) characteristics feature was estimated as 0.94 using Raman spectroscopy. NiO, CDs, and NiO/CDs nanocomposite coating were developed using a doctor blade method on the EN3 mild steel specimens. Electrochemical impedance spectroscopy was conducted in marine water conditions with 3.5 wt% of NaCl and seawater to evaluate the stability of the nanostructured coating. Electrochemical analysis, such as the Nyquist plot, Tafel plot, and frequency response finding, demonstrated that NiO/CDs nanocomposite coating has enhanced corrosion protection in 3.5 wt% NaCl solution compares to seawater medium. These findings underscore the potential of the NiO/CDs nanostructured coating to extend the lifespan of industrial mild steel (EN3) specimens in seawater environments.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114206"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We developed and evaluated two novel coumarin 6 conjugated Ir(III) photocatalysts, [Ir(CO6)(Ph-tpy)Cl]Cl (Ir1) and [Ir(CO6)(An-tpy)Cl]Cl (Ir2) (CO6 = Coumarin 6, Ph-tpy = 4′-phenyl-2,2′:6′,2″-terpyridine, An-tpy = 4′-anthracenyl-2,2′:6′,2″-terpyridine), for application in cancer therapy. Upon green light irradiation (525 nm, 50.2 J cm−2), Ir1 and Ir2 effectively catalyzed NADH oxidation with turnover frequencies (TOFs) ranging from 840 to 1100 h−1 in phosphate-buffered saline. Additionally, these complexes generated reactive oxygen species (ROS), including 1O2 and OH, through type I and type II mechanisms. Ir1 and Ir2 exhibited significant toxicity against human breast (MCF-7) and cervical (HeLa) cancer cells, with Ir2 demonstrating enhanced anticancer activity upon light activation. Notably, both complexes showed minimal dark toxicity toward non-cancerous human embryonic kidney (HEK-293) cells. The selectivity index (SI = Dark IC50 in normal cells/Dark IC50 in cancer cells) for Ir1 and Ir2 reached up to 22, highlighting their preferential activity in cancer cells. Mechanistic studies in MCF-7 cells with the most effective complex, Ir2, revealed that light exposure increased ROS production and induced mitochondrial depolarization and apoptosis via caspase 3/7 activation.
{"title":"Anticancer potential of polypyridyl-based Ir(III)-coumarin 6 conjugates under visible light and dark","authors":"Ashish Kumar Yadav , Virendra Singh , Rajesh Kushwaha , Amit Kunwar , Biplob Koch , Samya Banerjee","doi":"10.1016/j.inoche.2025.114184","DOIUrl":"10.1016/j.inoche.2025.114184","url":null,"abstract":"<div><div>We developed and evaluated two novel coumarin 6 conjugated Ir(III) photocatalysts, [Ir(CO6)(Ph-tpy)Cl]Cl (<strong>Ir1</strong>) and [Ir(CO6)(An-tpy)Cl]Cl (<strong>Ir2</strong>) (CO6 = Coumarin 6, Ph-tpy = 4′-phenyl-2,2′:6′,2″-terpyridine, An-tpy = 4′-anthracenyl-2,2′:6′,2″-terpyridine), for application in cancer therapy. Upon green light irradiation (525 nm, 50.2 J cm<sup>−2</sup>), <strong>Ir1</strong> and <strong>Ir2</strong> effectively catalyzed NADH oxidation with turnover frequencies (TOFs) ranging from 840 to 1100 h<sup>−1</sup> in phosphate-buffered saline. Additionally, these complexes generated reactive oxygen species (ROS), including <sup>1</sup>O<sub>2</sub> and <sup><img></sup>OH, through type I and type II mechanisms. <strong>Ir1</strong> and <strong>Ir2</strong> exhibited significant toxicity against human breast (MCF-7) and cervical (HeLa) cancer cells, with <strong>Ir2</strong> demonstrating enhanced anticancer activity upon light activation. Notably, both complexes showed minimal dark toxicity toward non-cancerous human embryonic kidney (HEK-293) cells. The selectivity index (SI = Dark IC<sub>50</sub> in normal cells/Dark IC<sub>50</sub> in cancer cells) for <strong>Ir1</strong> and <strong>Ir2</strong> reached up to 22, highlighting their preferential activity in cancer cells. Mechanistic studies in MCF-7 cells with the most effective complex, <strong>Ir2</strong>, revealed that light exposure increased ROS production and induced mitochondrial depolarization and apoptosis <em>via</em> caspase 3/7 activation.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114184"},"PeriodicalIF":4.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-23DOI: 10.1016/j.inoche.2025.114179
Xuewen Song , Dan Li , Ziwei Tang , Mingfei Li , Sen Wang , Renhe Yang , Jiwei Xue , Xianzhong Bu
Aragonite is an important dimorph of calcium carbonate (CaCO3), but only a few studies have reported its preparation and formation mechanism. This study presents a novel method for producing aragonite using steamed ammonia liquid waste as a calcium source and employing urea as both the carbon source and additive. X-ray diffraction and scanning electron microscopy were used to analyse various CaCO3 polymorphs and their morphologies. The effects of the reaction temperature and reaction time on the formation of aragonite were studied systematically. The results indicate that the content and shape of the aragonite crystals were significantly influenced by the reaction temperature and reaction time. Single crystals of aragonite CaCO3 were prepared at a reaction temperature of 140 °C and a reaction time of 120 min. An analysis of the formation mechanism showed that the reaction temperature and reaction time determine the thermal decomposition process of urea, thus controlling the nucleation and growth of aragonite CaCO3.
{"title":"Effects of reaction temperature and ageing time on aragonite formation using steamed ammonia liquid waste","authors":"Xuewen Song , Dan Li , Ziwei Tang , Mingfei Li , Sen Wang , Renhe Yang , Jiwei Xue , Xianzhong Bu","doi":"10.1016/j.inoche.2025.114179","DOIUrl":"10.1016/j.inoche.2025.114179","url":null,"abstract":"<div><div>Aragonite is an important dimorph of calcium carbonate (CaCO<sub>3</sub>), but only a few studies have reported its preparation and formation mechanism. This study presents a novel method for producing aragonite using steamed ammonia liquid waste as a calcium source and employing urea as both the carbon source and additive. X-ray diffraction and scanning electron microscopy were used to analyse various CaCO<sub>3</sub> polymorphs and their morphologies. The effects of the reaction temperature and reaction time on the formation of aragonite were studied systematically. The results indicate that the content and shape of the aragonite crystals were significantly influenced by the reaction temperature and reaction time. Single crystals of aragonite CaCO<sub>3</sub> were prepared at a reaction temperature of 140 °C and a reaction time of 120 min. An analysis of the formation mechanism showed that the reaction temperature and reaction time determine the thermal decomposition process of urea, thus controlling the nucleation and growth of aragonite CaCO<sub>3</sub>.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114179"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-23DOI: 10.1016/j.inoche.2025.114163
H. Agourrame , A.El Amri , H. Ez-zaki , N. Khachani , A. Diouri , A. Zarrouk
The study focuses on addressing wastewater contamination caused by increasing industrial activities by developing cost-effective, eco-friendly, and renewable materials. It investigates the use of white and black electric arc furnace slag (EAFS) from SONASID-Jorf steel in Morocco to prepare hydroxyapatite (HAP)/CSH and fluorapatite (FA)/CSH mixtures. These materials are evaluated for their adsorption properties using methylene blue (MB) as a model compound. The indicated phases were effectively formed by synthesizing activated slag with alkali activator utilizing a wet precipitation method. Characterization through X-ray diffraction (XRD), and scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy revealed the development of phases consisting of a combination of the hydroxyapatite (HAP)/CSH and fluorapatite (FA)/CSH phases. This study encompassed various factors such as initial contact time, dye concentrations, pH, sorbent doses, and the temperature of the initial dye solution. Adsorption isotherms, including Freundlich and Langmuir models, were utilized to describe the adsorption data. The maximum adsorption capacities for the different materials investigated were determined to be 114.15 mg/g and 147.05 mg/g at pH = 5. In all optimal conditions, the corresponding removal efficiencies for (HAP)/CSH and (FA)/CSH were found to be 85.94 % and 95.12 %, respectively. The adsorption kinetics of the mixtures was adapted to the pseudo-second-order model. The maximum experimental adsorption capacities predicted by the Langmuir model. The values of thermodynamic parameters revealed that the adsorption of the mixtures was exothermic, favorable, and spontaneous in nature. The results underscore the significant potential of mixtures as promising adsorbents for efficiently removing MB from aqueous solutions.
{"title":"Synthesis and characterization of a new inorganic material of fluor/hydroxyapatite CSH mixtures from blast furnace slag and their application in the removal of a cationic dye (methyleneblue) in aqueous solution","authors":"H. Agourrame , A.El Amri , H. Ez-zaki , N. Khachani , A. Diouri , A. Zarrouk","doi":"10.1016/j.inoche.2025.114163","DOIUrl":"10.1016/j.inoche.2025.114163","url":null,"abstract":"<div><div>The study focuses on addressing wastewater contamination caused by increasing industrial activities by developing cost-effective, eco-friendly, and renewable materials. It investigates the use of white and black electric arc furnace slag (EAFS) from SONASID-Jorf steel in Morocco to prepare hydroxyapatite (HAP)/C<img>S<img>H and fluorapatite (FA)/C<img>S<img>H mixtures. These materials are evaluated for their adsorption properties using methylene blue (MB) as a model compound. The indicated phases were effectively formed by synthesizing activated slag with alkali activator utilizing a wet precipitation method. Characterization through X-ray diffraction (XRD), and scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy revealed the development of phases consisting of a combination of the hydroxyapatite (HAP)/C<img>S<img>H and fluorapatite (FA)/C<img>S<img>H phases. This study encompassed various factors such as initial contact time, dye concentrations, pH, sorbent doses, and the temperature of the initial dye solution. Adsorption isotherms, including Freundlich and Langmuir models, were utilized to describe the adsorption data. The maximum adsorption capacities for the different materials investigated were determined to be 114.15 mg/g and 147.05 mg/g at pH = 5. In all optimal conditions, the corresponding removal efficiencies for (HAP)/C<img>S<img>H and (FA)/C<img>S<img>H were found to be 85.94 % and 95.12 %, respectively. The adsorption kinetics of the mixtures was adapted to the pseudo-second-order model. The maximum experimental adsorption capacities predicted by the Langmuir model. The values of thermodynamic parameters revealed that the adsorption of the mixtures was exothermic, favorable, and spontaneous in nature. The results underscore the significant potential of mixtures as promising adsorbents for efficiently removing MB from aqueous solutions.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114163"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-23DOI: 10.1016/j.inoche.2025.114162
Amira K. Hajri , Sahr A. Alsherari , Marzough A. Albalawi , Amnah A. Alharbi , Doha A. Albalawi , Maram Qasem Albalawi
A significant number of researchers are focused on identifying effective methods for removing Co(II) ions from industrial wastewater. Nevertheless, current removal techniques often inadvertently eliminate other valuable metals, potentially resulting in economic disadvantages. A novel metal–organic framework has been synthesized using thorium and activated algae, encased in a double-layer hydrogel of chitosan and alginate (TMACA). Several methods were used to thoroughly characterize the adsorbent’s characteristics, such as XRD, FT-IR, XPS, FESEM, EDX, and nitrogen adsorption/desorption isotherms, to elucidate its textural characteristics. A detailed examination of nitrogen adsorption and desorption isotherms provided valuable insights into the textural characteristics of TMACA hydrogel beads. The specific surface area was quantitatively evaluated at around 1216.41 m2/g, indicating significant surface interaction potential, while the total hole volume was quantified at 0.747 cm3/g. These metrics imply that the TMACA hydrogel beads possess a notably efficient porous structure. Furthermore, the calculated average radius of particle was found to be 1.12 nm. This study analyzed how dosage, original concentration, pH, and temperature affect adsorption. The outcomes showed that the adsorption mechanism followed the pseudo-second-order model and the Langmuir isotherm. With an energy of 31.8 kJ.mol−1, chemisorption was the primary adsorption process. Higher temperatures increased metal adsorption, indicating the procedure is endothermic besides spontaneous. Through calculated tests, the adsorption process was significantly improved by using the Box-Behnken design utilising response surface methods in Design-Expert software. The study parameters included 0.02 g of TMACA hydrogel beads per 25 ml, pH of 6, and an adsorption capability of 445.8 mg/g aimed at the Co(II) solutions. The results showed that the adsorbent showed consistent stability and that its effectiveness in removing impurities did not decrease after five consecutive cycles of adsorption and desorption. Additionally, the substance maintained its initial chemical composition both before and after its reuse, demonstrated reliable effectiveness, and exhibited stable X-ray diffraction (XRD) characteristics throughout the process.
{"title":"Highly effective removal of cobalt from aqueous solution via reusable nanocomposite of metal organic frame work and activated algae encapsulated onto double layer biopolymer","authors":"Amira K. Hajri , Sahr A. Alsherari , Marzough A. Albalawi , Amnah A. Alharbi , Doha A. Albalawi , Maram Qasem Albalawi","doi":"10.1016/j.inoche.2025.114162","DOIUrl":"10.1016/j.inoche.2025.114162","url":null,"abstract":"<div><div>A significant number of researchers are focused on identifying effective methods for removing Co(II) ions from industrial wastewater. Nevertheless, current removal techniques often inadvertently eliminate other valuable metals, potentially resulting in economic disadvantages. A novel metal–organic framework has been synthesized using thorium and activated algae, encased in a double-layer hydrogel of chitosan and alginate (TMACA). Several methods were used to thoroughly characterize the adsorbent’s characteristics, such as XRD, FT-IR, XPS, FESEM, EDX, and nitrogen adsorption/desorption isotherms, to elucidate its textural characteristics. A detailed examination of nitrogen adsorption and desorption isotherms provided valuable insights into the textural characteristics of TMACA hydrogel beads. The specific surface area was quantitatively evaluated at around 1216.41 m<sup>2</sup>/g, indicating significant surface interaction potential, while the total hole volume was quantified at 0.747 cm<sup>3</sup>/g. These metrics imply that the TMACA hydrogel beads possess a notably efficient porous structure. Furthermore, the calculated average radius of particle was found to be 1.12 nm. This study analyzed how dosage, original concentration, pH, and temperature affect adsorption. The outcomes showed that the adsorption mechanism followed the pseudo-second-order model and the Langmuir isotherm. With an energy of 31.8 kJ.mol<sup>−1</sup>, chemisorption was the primary adsorption process. Higher temperatures increased metal adsorption, indicating the procedure is endothermic besides spontaneous. Through calculated tests, the adsorption process was significantly improved by using the Box-Behnken design utilising response surface methods in Design-Expert software. The study parameters included 0.02 g of TMACA hydrogel beads per 25 ml, pH of 6, and an adsorption capability of 445.8 mg/g aimed at the Co(II) solutions. The results showed that the adsorbent showed consistent stability and that its effectiveness in removing impurities did not decrease after five consecutive cycles of adsorption and desorption. Additionally, the substance maintained its initial chemical composition both before and after its reuse, demonstrated reliable effectiveness, and exhibited stable X-ray diffraction (XRD) characteristics throughout the process.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114162"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study presents a new class of coordination polymers synthesized from 1,2,4,5-tetrakis(diphenylphosphino)pyridine and trivalent Eu(III), Tb(III), and Gd(III) ions. The synthesized polymers exhibit a unique one-dimensional periodic structure enabled by the bridging chelate nature of the ligand, and a noteworthy luminescent efficiency. Terbium and Europium complexes demonstrate high quantum yields and high purity luminescence colors. They are therefore promising materials for photonic devices such as OLEDs, where high-intensity monochromatic emission is required.
{"title":"New coordination polymers of 1,2,4,5-tetrakis (diphenylphosphino)pyridine with Eu(III), Tb (III), and Gd(III). Synthesis and luminescent properties","authors":"V.K. Brel , O.I. Artyushin , E.V. Smirnova , E.E. Kim , A.V. Vologzhanina , M.T. Metlin , P.V. Dorovatovskii , I.V. Taydakov","doi":"10.1016/j.inoche.2025.114156","DOIUrl":"10.1016/j.inoche.2025.114156","url":null,"abstract":"<div><div>This study presents a new class of coordination polymers synthesized from 1,2,4,5-tetrakis(diphenylphosphino)pyridine and trivalent Eu(III), Tb(III), and Gd(III) ions. The synthesized polymers exhibit a unique one-dimensional periodic structure enabled by the bridging chelate nature of the ligand, and a noteworthy luminescent efficiency. Terbium and Europium complexes demonstrate high quantum yields and high purity luminescence colors. They are therefore promising materials for photonic devices such as OLEDs, where high-intensity monochromatic emission is required.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114156"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-23DOI: 10.1016/j.inoche.2025.114167
Xuemei Ma , Yuyue Ma , Liming Dong , Xile Chang , Tongyu Yang , Xinli Cao , Li Feng , Zhiyong Hu , Tuoping Hu
A two-step pyrolysis process was successfully employed to synthesize nitrogen-doped carbon dots (N-CDs), a corrosion inhibitor whose structure and properties were deeply studied. The results indicate that the nitrogen in the obtained N-CDs consists of pyrrolic and graphitic nitrogen, along with abundant hydroxyl and carboxyl groups. This composition enables the chemical adsorption capabilities of N-CDs while also enhancing effective physical adsorption capacity. The corrosion inhibition performance of N-CDs was evaluated at concentrations ranging from 5 to 80 mg/L, the inhibition efficiency increasing with concentration and reaching over 95.52 % at a dosage of 80 mg/L. N-CDs adsorption followed the R-P (Redlich-Peterson) isotherm. A dense protective film is formed on the metal surface through both chemical and physical adsorption, facilitating this inhibition mechanism, and the inherent negative charge of N-CDs further enhances this effect. This study provides new insights into the development of more efficient corrosion inhibitors based on carbon dots.
{"title":"Novel hydroxyl and carboxyl group-enriched nitrogen-doped carbon dots N-CDs as highly efficient corrosion inhibitors for carbon steel Q235 in 1 M HCl","authors":"Xuemei Ma , Yuyue Ma , Liming Dong , Xile Chang , Tongyu Yang , Xinli Cao , Li Feng , Zhiyong Hu , Tuoping Hu","doi":"10.1016/j.inoche.2025.114167","DOIUrl":"10.1016/j.inoche.2025.114167","url":null,"abstract":"<div><div>A two-step pyrolysis process was successfully employed to synthesize nitrogen-doped carbon dots (N-CDs), a corrosion inhibitor whose structure and properties were deeply studied. The results indicate that the nitrogen in the obtained N-CDs consists of pyrrolic and graphitic nitrogen, along with abundant hydroxyl and carboxyl groups. This composition enables the chemical adsorption capabilities of N-CDs while also enhancing effective physical adsorption capacity. The corrosion inhibition performance of N-CDs was evaluated at concentrations ranging from 5 to 80 mg/L, the inhibition efficiency increasing with concentration and reaching over 95.52 % at a dosage of 80 mg/L. N-CDs adsorption followed the R-P (Redlich-Peterson) isotherm. A dense protective film is formed on the metal surface through both chemical and physical adsorption, facilitating this inhibition mechanism, and the inherent negative charge of N-CDs further enhances this effect. This study provides new insights into the development of more efficient corrosion inhibitors based on carbon dots.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114167"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-23DOI: 10.1016/j.inoche.2025.114181
Yuxin Huang , Liwen Tang , Ruixiang Hu , Jialiang Lin , Xiaoman Li , Jianhua Cheng
The efficient exposure of active sites of MOF materials for the catalytic reaction is challenging. In this study, we report the successful synthesis of a novel Fenton-like catalyst, 0.2Cu/MIL-101(Fe)-300, utilizing a modified solvothermal method followed by thermal activation. 91.7 % of CIP was degraded in 30 min by dosing 0.2Cu/MIL-101(Fe)-300 (0.05 g/L) and PMS (0.1 mM) at pH 7, and the kinetic constant was 15.2 times higher than that in MIL-101(Fe)/PMS system. A systematic investigation was conducted to evaluate the influence of catalyst dosage, PMS concentration, initial pH, and the presence of coexisting anions on the degradation of CIP, aiming to optimize the degradation process. The quenching tests and EPR analysis revealed that the oxidation reaction involved multiple ROS, including SO4•−, •OH, O2•−, and 1O2, with SO4•− and •OH identified as the primary ROS responsible for the degradation of CIP. Furthermore, potential degradation pathways for CIP were outlined, and the toxicity of the resulting intermediates was evaluated. This work provides a novel approach for creating highly effective, durable, and non-toxic Fenton-like catalysts to attain outstanding environmental restoration efficacy across a wide pH range.
{"title":"Cu-doped MIL-101(Fe) with unsaturated metal sites activate peroxymonosulfate for efficient degradation of ciprofloxacin: Optimization, mechanism, and toxicity assessment","authors":"Yuxin Huang , Liwen Tang , Ruixiang Hu , Jialiang Lin , Xiaoman Li , Jianhua Cheng","doi":"10.1016/j.inoche.2025.114181","DOIUrl":"10.1016/j.inoche.2025.114181","url":null,"abstract":"<div><div>The efficient exposure of active sites of MOF materials for the catalytic reaction is challenging. In this study, we report the successful synthesis of a novel Fenton-like catalyst, 0.2Cu/MIL-101(Fe)-300, utilizing a modified solvothermal method followed by thermal activation. 91.7 % of CIP was degraded in 30 min by dosing 0.2Cu/MIL-101(Fe)-300 (0.05 g/L) and PMS (0.1 mM) at pH 7, and the kinetic constant was 15.2 times higher than that in MIL-101(Fe)/PMS system. A systematic investigation was conducted to evaluate the influence of catalyst dosage, PMS concentration, initial pH, and the presence of coexisting anions on the degradation of CIP, aiming to optimize the degradation process. The quenching tests and EPR analysis revealed that the oxidation reaction involved multiple ROS, including SO<sub>4</sub><sup>•−</sup>, •OH, O<sub>2</sub><sup>•−</sup>, and <sup>1</sup>O<sub>2</sub>, with SO<sub>4</sub><sup>•−</sup> and •OH identified as the primary ROS responsible for the degradation of CIP. Furthermore, potential degradation pathways for CIP were outlined, and the toxicity of the resulting intermediates was evaluated. This work provides a novel approach for creating highly effective, durable, and non-toxic Fenton-like catalysts to attain outstanding environmental restoration efficacy across a wide pH range.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114181"},"PeriodicalIF":4.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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