CeO2 is a significant material in the photocatalytic hydrogen evolution reactions due to the high creating ability of oxygen vacancies, high chemical stability and excellent redox properties. However, the wide band gap of CeO2 limits the visible light absorption. In this study, SiC loaded to CeO2 nanofiber catalyst by electrospinning methods to improve the light absorption efficiency and increase the active surface area result in enhanced photocatalytic performance. In the photocatalytic hydrogen evolution reactions medium, which contain eosin Y dye and triethanolamine as a photosensitizer and an electron donor, respectively. The addition of SiC to CeO2 improve the visible light absorption rate, electron transfer efficiency. The hydrogen production rate of CeO2/SiC nanofiber catalyst reaches to 5208 μmol g−1 under visible light irradiation, it is approximately 13- and 2-times higher than SiC and CeO2 nanofiber, respectively. Furthermore, CeO2/SiC nanofiber catalyst maintain more than half of it is photocatalytic activity after 3 cycles of reactions. Therefore, the CeO2/SiC nanofiber catalyst will provide innovative approaches to achieve efficient photocatalytic water splitting in the future, enabling the development of catalytic studies.
{"title":"Enhanced photocatalytic hydrogen evolution via SiC loaded CeO2 nanofiber composite","authors":"Munevver Tuna Genc , Adem Sarilmaz , Emre Aslan , Faruk Ozel , Imren Hatay Patir","doi":"10.1016/j.inoche.2025.114203","DOIUrl":"10.1016/j.inoche.2025.114203","url":null,"abstract":"<div><div>CeO<sub>2</sub> is a significant material in the photocatalytic hydrogen evolution reactions due to the high creating ability of oxygen vacancies, high chemical stability and excellent redox properties. However, the wide band gap of CeO<sub>2</sub> limits the visible light absorption. In this study, SiC loaded to CeO<sub>2</sub> nanofiber catalyst by electrospinning methods to improve the light absorption efficiency and increase the active surface area result in enhanced photocatalytic performance. In the photocatalytic hydrogen evolution reactions medium, which contain eosin Y dye and triethanolamine as a photosensitizer and an electron donor, respectively. The addition of SiC to CeO<sub>2</sub> improve the visible light absorption rate, electron transfer efficiency. The hydrogen production rate of CeO<sub>2</sub>/SiC nanofiber catalyst reaches to 5208 μmol g<sup>−1</sup> under visible light irradiation, it is approximately 13- and 2-times higher than SiC and CeO<sub>2</sub> nanofiber, respectively. Furthermore, CeO<sub>2</sub>/SiC nanofiber catalyst maintain more than half of it is photocatalytic activity after 3 cycles of reactions. Therefore, the CeO<sub>2</sub>/SiC nanofiber catalyst will provide innovative approaches to achieve efficient photocatalytic water splitting in the future, enabling the development of catalytic studies.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114203"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519425","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.2025.114193
N. Bano , Ijaz Hussain , Eman A. Alghamdi , Sana Ullah Asif , H.S. Althobaiti , Fatimah S. Alfaifi
In this work, Ba0.3Sr0.3Ca0.4Al0.5SmxFe11.50-xO19 (x = 0.00, 0.25, 0.50, 0.75) hexaferrites were synthesized using the sol–gel auto-combustion approach. The synthesis of M-type hexaferrites without impurities is confirmed by X-ray diffraction analysis. Refined lattice parameters were used to calculate the unit cell volume. The volume increased to the value of 698.78 Å3 and Porosity reached to maximum value of 14.34 % for maximum doping level x = 0.75. Using scanning electron microscopy, the surface morphology of the synthesized Sm-substituted hexaferrite nanoparticles was investigated. In the pure sample, there are tiny agglomerate particles that do not possess any particular geometric shape. Maximum doping concentration x = 0.75 resulted in variations of Ms to 36.15 emu/g, Mr to 20.55 emu/g, and magnetic coercivity 4.117 kOe. All of the sample’s Mr/Ms values greater than 0.5, indicated that the synthesized hexaferrite nanoparticles have a single-domain magnetic structure. The results show that as dopant concentrations rise, magnetocrystalline anisotropic constant (K), magnetic moment per formula unit (mB(μB)), anisotropy field (Ha), anisotropy parameter (B) values increase proportionately to 0.0292 erg/kOe, 7.211µB, 1.286 kOe, 110329.7 respectively. High values of the discussed magnetic parameters make the material suitable for high-density data storage, EMI shielding, spintronic devices, and automotive sensors.
{"title":"Exploring the microstructural and magnetic parameters of Ba0.3Sr0.3Ca0.4Al0.5SmxFe11.50-xO19 (x = 0.00, 0.25, 0.50, 0.75) hexaferrite nanoparticles","authors":"N. Bano , Ijaz Hussain , Eman A. Alghamdi , Sana Ullah Asif , H.S. Althobaiti , Fatimah S. Alfaifi","doi":"10.1016/j.inoche.2025.114193","DOIUrl":"10.1016/j.inoche.2025.114193","url":null,"abstract":"<div><div>In this work, Ba<sub>0.3</sub>Sr<sub>0.3</sub>Ca<sub>0.4</sub>Al<sub>0.5</sub>Sm<sub>x</sub>Fe<sub>11.50-x</sub>O<sub>19</sub> (x = 0.00, 0.25, 0.50, 0.75) hexaferrites were synthesized using the sol–gel auto-combustion approach. The synthesis of M-type hexaferrites without impurities is confirmed by X-ray diffraction analysis. Refined lattice parameters were used to calculate the unit cell volume. The volume increased to the value of 698.78 Å<sup>3</sup> and Porosity reached to maximum value of 14.34 % for maximum doping level x = 0.75. Using scanning electron microscopy, the surface morphology of the synthesized Sm-substituted hexaferrite nanoparticles was investigated. In the pure sample, there are tiny agglomerate particles that do not possess any particular geometric shape. Maximum doping concentration x = 0.75 resulted in variations of Ms to 36.15 emu/g, Mr to 20.55 emu/g, and magnetic coercivity 4.117 kOe. All of the sample’s Mr/Ms values greater than 0.5, indicated that the synthesized hexaferrite nanoparticles have a single-domain magnetic structure. The results show that as dopant concentrations rise, magnetocrystalline anisotropic constant (K), magnetic moment per formula unit (m<sub>B</sub>(μ<sub>B</sub>)), anisotropy field (Ha), anisotropy parameter (B) values increase proportionately to 0.0292 erg/kOe, 7.211µ<sub>B</sub>, 1.286 kOe, 110329.7 respectively. High values of the discussed magnetic parameters make the material suitable for high-density data storage, EMI shielding, spintronic devices, and automotive sensors.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"175 ","pages":"Article 114193"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529465","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.2025.114194
A.R. Krithikka, D. Pushparani, D. Santhanaraj
The monometallic and bimetallic Metal Organic Framework (MOF-2) materials (Zinc MOF-2, Copper MOF-2, and bimetallic Copper-Zinc MOF-2) were prepared at room temperature. The phase formation and lattice parameters were studied through X-ray diffraction analysis. The deviation of the unit cell values confirmed the coordination of copper and bimetallic Cu/Zn ions with terephthalic acid, and no additional impurity phase formation was observed. The oxidation state of the metal and interaction between metal and organic linkers were exclusively studied from the X-ray photoelectron spectroscopy analysis; the shift in binding energy values signifying the strong coordination bond between the ligand and metal ions. Further, the presence of functional groups and dimethylformamide (DMF) in the moieties was confirmed by Fourier Transform-Infrared Spectroscopy (FT-IR) analysis. The mono and bimetallic MOF-2 materials were subjected to antimicrobial assay against Gram-positive Staphylococcus aureus and Bacillus subtilis and Gram-negative Escherichia coli bacteria using the disc diffusion method. The bimetallic Cu-Zn-MOF-2 material showed higher activity than the monometallic Zn and Cu-MOF-2 material. The results were correlated with the self-decomposition reaction rate of hydrogen peroxide, which evidently proved the maximum potency exhibited by the bimetallic material.
{"title":"Facile room temperature synthesis of mono and bimetallic MOF-2 materials: A synergistic strategy towards enhanced antimicrobial activity","authors":"A.R. Krithikka, D. Pushparani, D. Santhanaraj","doi":"10.1016/j.inoche.2025.114194","DOIUrl":"10.1016/j.inoche.2025.114194","url":null,"abstract":"<div><div>The monometallic and bimetallic Metal Organic Framework (MOF-2) materials (Zinc MOF-2, Copper MOF-2, and bimetallic Copper-Zinc MOF-2) were prepared at room temperature. The phase formation and lattice parameters were studied through X-ray diffraction analysis. The deviation of the unit cell values confirmed the coordination of copper and bimetallic Cu/Zn ions with terephthalic acid, and no additional impurity phase formation was observed. The oxidation state of the metal and interaction between metal and organic linkers were exclusively studied from the X-ray photoelectron spectroscopy analysis; the shift in binding energy values signifying the strong coordination bond between the ligand and metal ions. Further, the presence of functional groups and dimethylformamide (DMF) in the moieties was confirmed by Fourier Transform-Infrared Spectroscopy (FT-IR) analysis. The mono and bimetallic MOF-2 materials were subjected to antimicrobial assay against Gram-positive <em>Staphylococcus aureus</em> and <em>Bacillus subtilis</em> and Gram-negative <em>Escherichia coli</em> bacteria using the disc diffusion method. The bimetallic Cu-Zn-MOF-2 material showed higher activity than the monometallic Zn and Cu-MOF-2 material. The results were correlated with the self-decomposition reaction rate of hydrogen peroxide, which evidently proved the maximum potency exhibited by the bimetallic material.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"176 ","pages":"Article 114194"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548757","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.2025.114204
Awais Khalid , Pervaiz Ahmad , Hanadi A. Almukhlifi , Haia H. Aldosari , Mousa M. Hossin , Adeel Ahmed , A. Timoumi , T. Alomayri
Developing cost-effective and exceptionally stable photocatalyst materials for the degradation of dyes is of paramount importance in addressing the global sustainability problems resulting from inappropriate usage of the dyes. In the current investigation, we have highlighted the production of exceptionally efficient titanium dioxide adorned on graphitic carbon nitride (TiO2/g-CN) to form a heterojunction catalyst utilizing the sono-thermal technique. The physical properties and phase purity of the produced TiO2/g-CN were determined using a range of characterization methodologies. The constructed TiO2/g-CN heterojunctions were employed in the photocatalytic decomposition of organic dyes, namely methyl violet (MV) and alizarin yellow R (AYR), under exposure to visible light. The outcomes of the experiment demonstrated the exceptional photocatalytic properties of TiO2/g-CN with 95.57 % MV and 93.88 % AYR in 42 min under the influence of visible light, which was much higher than pristine TiO2 and g-CN. The boosted mineralization of dyes using TiO2/g-CN is related to the large surface area of TiO2/g-CN (83.46 m2/g) as compared to pristine TiO2 (76.99 m2/g). Experiments on photocatalytic degradation were also conducted, utilizing multiple reaction conditions that adhered to pseudo-first-order kinetics. Radical quenching analysis supported the existence of reactive species produced in the reaction system responsible for the decomposition of MV and AYR. The outstanding photocatalytic capability of TiO2/g-CN indicated that the produced composite materials could be effectively utilized for eliminating naturally occurring dyes from water contamination.
{"title":"Construction of highly efficient titanium dioxide adorned with graphitic carbon nitride with improved visible light-harvesting ability for the photocatalytic degradation of organic dyes","authors":"Awais Khalid , Pervaiz Ahmad , Hanadi A. Almukhlifi , Haia H. Aldosari , Mousa M. Hossin , Adeel Ahmed , A. Timoumi , T. Alomayri","doi":"10.1016/j.inoche.2025.114204","DOIUrl":"10.1016/j.inoche.2025.114204","url":null,"abstract":"<div><div>Developing cost-effective and exceptionally stable photocatalyst materials for the degradation of dyes is of paramount importance in addressing the global sustainability problems resulting from inappropriate usage of the dyes. In the current investigation, we have highlighted the production of exceptionally efficient titanium dioxide adorned on graphitic carbon nitride (TiO<sub>2</sub>/g-CN) to form a heterojunction catalyst utilizing the sono-thermal technique. The physical properties and phase purity of the produced TiO<sub>2</sub>/g-CN were determined using a range of characterization methodologies. The constructed TiO<sub>2</sub>/g-CN heterojunctions were employed in the photocatalytic decomposition of organic dyes, namely methyl violet (MV) and alizarin yellow R (AYR), under exposure to visible light. The outcomes of the experiment demonstrated the exceptional photocatalytic properties of TiO<sub>2</sub>/g-CN with 95.57 % MV and 93.88 % AYR in 42 min under the influence of visible light, which was much higher than pristine TiO<sub>2</sub> and g-CN. The boosted mineralization of dyes using TiO<sub>2</sub>/g-CN is related to the large surface area of TiO<sub>2</sub>/g-CN (83.46 m<sup>2</sup>/g) as compared to pristine TiO<sub>2</sub> (76.99 m<sup>2</sup>/g). Experiments on photocatalytic degradation were also conducted, utilizing multiple reaction conditions that adhered to pseudo-first-order kinetics. Radical quenching analysis supported the existence of reactive species produced in the reaction system responsible for the decomposition of MV and AYR. The outstanding photocatalytic capability of TiO<sub>2</sub>/g-CN indicated that the produced composite materials could be effectively utilized for eliminating naturally occurring dyes from water contamination.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"176 ","pages":"Article 114204"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548854","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}
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}
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