Journal of Cluster Science最新文献

{"title":"Structural Studies of Copper Species in Supported CuO/CeO2 Catalyst by X-ray Absorption Spectroscopy Coupled with Pair Distribution Function Analysis","authors":"Vera P. Pakharukova,&nbsp;Vladimir V. Kriventsov,&nbsp;Arcady V. Ishchenko,&nbsp;Dmitry I. Potemkin,&nbsp;Pavel V. Snytnikov","doi":"10.1007/s10876-024-02727-5","DOIUrl":"10.1007/s10876-024-02727-5","url":null,"abstract":"<div><p>Ceria-supported copper catalysts exhibit high catalytic performance in the preferential oxidation of CO in excess H₂ (CO PROX). Highly dispersed copper oxide species have been experimentally identified as active centers. However, structural diagnostics of highly dispersed CuO_x species and CuO_x/CeO₂ interface areas remains a challenge. Here, we report a comprehensive structural study of a supported CuO/CeO₂ catalyst (5 wt% Cu) showing good activity in the CO PROX process. X-ray absorption spectroscopy (XAS) techniques and X-ray atomic pair distribution function (PDF) analysis were used as efficient methods for probing the atomic resolution structure. It was established that the catalyst contains Cu²⁺ species, mainly in the form of ultra-dispersed CuO-like particles and copper oxide clusters. Analysis of the local atomic arrangement revealed an interaction between copper ions and ceria surface. Oxygen-terminated {100} ceria facets can accommodate Cu²⁺ ions in square planar coordination. Moreover, some Cu ions are inserted into the CeO₂ crystal structure, forming a substitutional solid solution.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761736","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}

{"title":"Medicinal Plants Extract for the Bio-Assisted Synthesis of Ag/AgCl Nanoparticles with Antibacterial Activity","authors":"Jorge Luis Torres-López,&nbsp;Stephania Lázaro-Mass,&nbsp;Susana De la Rosa-García,&nbsp;Mayra A. Alvarez-Lemus,&nbsp;Abraham Gómez-Rivera,&nbsp;Rosendo López-González,&nbsp;Carlos Ernesto Lobato-García,&nbsp;Getsemani Morales-Mendoza,&nbsp;Sergio Gómez-Cornelio","doi":"10.1007/s10876-024-02722-w","DOIUrl":"10.1007/s10876-024-02722-w","url":null,"abstract":"<div><p>The increasing antibiotic resistance necessitates sustainable methods for synthesizing antibacterial nanoparticles. This study focuses on the bio-assisted synthesis of silver/silver chloride nanoparticles (Ag/AgCl-NPs) using aqueous extracts of <i>Acalypha arvensis</i>, <i>Hampea rovirosae</i>, and <i>Inga jinicuil</i>. Polyphenols and flavonoids were quantified, and functional groups were analyzed via Fourier-transform infrared to assess their influence on the properties of Ag/AgCl-NPs. The effects of thermal treatment at 60 and 500 °C on the NPs’ size, morphology, and antibacterial efficacy were assessed. UV–Vis spectroscopy indicated absorption peaks between 430 and 449 nm, while X-ray diffraction analysis confirmed the presence of metallic Ag and a cubic AgCl structure, with crystallite sizes ranging from 11–51 and 28–60 nm, respectively. Dynamic light scattering showed hydrodynamic sizes of up to 127.2 ± 0.9 nm at 60 °C and up to 348.9 ± 10.7 nm at 500 °C. Field emission scanning electron microscopy micrographs exhibited a quasi-spherical morphology with significant agglomeration; showing particle sizes between 55 ± 11 and 81 ± 28 nm at 60 °C, and up to 135 ± 65 nm at 500 °C. X-ray photoelectron spectroscopy confirmed the metallic silver (Ag⁰), organic molecules, and absorbed chlorides on the NP surface. Pearson correlation analysis indicated a strong positive correlation between polyphenol content and NPs yield (r = 0.922), while it indicated a strong negative correlation with flavonoid content (r = −0.996). Additionally, a negative correlation was found between hydrodynamic size and antibacterial activity against <i>Staphylococcus aureus</i> (r = −0.854). The Ag/AgCl-NPs, after drying at 60 and 500 °C, were tested against <i>Escherichia coli</i> and <i>S. aureus</i> with minimum bactericidal concentrations below 19 µg/mL against <i>E. coli</i>. Minimum inhibitory concentration (MIC) for Ag/AgCl-NPs synthesized with <i>A. arvensis</i> and <i>H. rovirosae</i> extracts were above 312 µg/mL for <i>S. aureus</i>, while those synthesized with <i>I. jinicuil</i> showed MIC as low as 156 µg/mL. These results highlight the potential of medicinal plant extracts in the synthesis of Ag/AgCl with enhanced antibacterial properties.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761695","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}

{"title":"An Insight into Antimicrobial, Antioxidant, Anticancer, and Antidiabetic Activities of Trimetallic Se/ZnO/CuO Nanoalloys Fabricated by Aqueous Extract of Nitraria retusa","authors":"Mohamed A. Amin,&nbsp;Noura A. Algamdi,&nbsp;Moayad S. Waznah,&nbsp;Duaa A. Bukhari,&nbsp;Sultan M. Alsharif,&nbsp;Fahad Alkhayri,&nbsp;Mahmoud Abdel-Nasser,&nbsp;Amr Fouda","doi":"10.1007/s10876-024-02742-6","DOIUrl":"10.1007/s10876-024-02742-6","url":null,"abstract":"<div><p>The unique features of trimetallic nanoalloys to be used in biomedical applications have taken more attention instead those of mono and bimetallic nanoparticles. Leaf aqueous extract of <i>Nitraria retusa</i> was utilized for the first time to synthesize trimetallic Se/ZnO/CuO (TSZC) nanoalloys. Data displayed the formation of crystallographic and spherical TSZC with an average size of 47.69 ± 1.95 nm by the action of active molecules in <i>N. retusa</i> extract. EDX analysis reveals the existing Se, Zn, and Cu peaks at specific bending energies with weight percentages of 17.03, 9.44, and 8.36% respectively. TSZC showed promising antimicrobial activity against <i>Staphylococcus aureus</i>,<i> Escherichia coli</i>,<i> Candida albicans</i>, and <i>Penicillium glabrum</i>, superior the activity of positive control. The clear zones ranging from 12.3 ± 0.6 to 32.7 ± 0.5 mm were attained due to TSZC treatment with MIC values of 12.5 µg mL^–1 for <i>E. coli</i>,<i> C. albicans</i>, and <i>P. glabrum</i>, and 50 µg mL^–1 for <i>S. aureus.</i> The maximum DPPH scavenging activity (90.1 ± 0.2%) was attained at 1000 µg mL^–1 TSZC compared to ascorbic acid (98.3 ± 0.2%). The IC₅₀ of TSZC nanoalloys against normal cell line (WI38) was 294.9 ± 4.4 µg mL^–1 compared to IC₅₀ against cancer cells (Caco-2 = 83.01 ± 1.1; Mcf7 = 91.7 ± 1.2 µg mL^–1) Which indicates that the TSZC are targeted cancer cells at low concentrations. Finally, the inhibition of α-amylase and α-glucosidase by TSZC with IC₅₀ values of 23.2 ± 3.8 and 32.1 ± 2.6 µg mL^–1 respectively compared to acarbose as a positive control (IC₅₀ = 10.9 ± 1.5 and 15.9 ± 1.8 µg mL^–1 for α-amylase and α-glucosidase respectively) indicates the superior antidiabetic activity in-vitro.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761694","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}

{"title":"AIE-Fluorescent TPENC12 Nanoliposome: Construction and Characterization of Optical Properties","authors":"Hongye Liao,&nbsp;Xun Yang,&nbsp;Xinyu Shi,&nbsp;Jianv Wang,&nbsp;Tong Xia,&nbsp;Simei Yang,&nbsp;Qingqing He,&nbsp;Xia Xiong,&nbsp;Li Liu,&nbsp;Changzhen Sun","doi":"10.1007/s10876-024-02731-9","DOIUrl":"10.1007/s10876-024-02731-9","url":null,"abstract":"<div><p>The advancement of optical imaging technology has greatly facilitated the research on fluorescent probes with tumor imaging capabilities. Tetraphenylethlene (TPE) is a well-known molecule with aggregation-induced emission (AIE) properties. Accordingly, its derivatives have been widely used for fluorescence imaging of tumors. In the present study, we designed and synthesized five AIE molecules that contained TPE and had varying alkyl chain lengths. The fluorescent molecules were found to adhere to the two rules of spectroscopy in both favorable and unfavorable solvents. Furthermore, all molecules were able to form aggregates in the DCM/n-hexane mixture, demonstrating the AIE effect. Among them, TPENC12 possessed the most appropriate alkyl chain length. Following the five molecules successful integration into nanoliposomes. The nanoliposomes were screened, to obtain the TPENC12 nanoliposome that exhibited the highest fluorescence intensity. TPENC12 nanoliposome were capable of being taken up by melanoma cells, thus, effectively enabling tumor imaging. Moreover, they demonstrated a significant anti-tumor effect against melanoma at low concentrations, while exhibiting minimal toxicity towards normal cells. The present study, thus, offers valuable insights into the molecular structure design of AIE-based TPE derivatives for fluorescent imaging, thereby highlighting their potential for use in tumor imaging, as well as in the treatment of melanoma.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761799","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}

{"title":"Synthesis of Chitosan-Modified Diclofenac Acid Prodrug Nanoparticles and Evaluation of Their Anti-Inflammatory Effects in a Preclinical Model","authors":"Shahida Muhammad Habib,&nbsp;Huma Ikram,&nbsp;Shafi Ullah,&nbsp;Abdul Jabbar,&nbsp;Saira Yasmeen,&nbsp;Muhammad Raza Shah","doi":"10.1007/s10876-024-02734-6","DOIUrl":"10.1007/s10876-024-02734-6","url":null,"abstract":"<div><p>Diclofenac acid (DA) is widely employed in various clinical settings for pain management. However, prolonged use of DA can induce various adverse effects on the gut, including ulcers and intestinal bleeding. There is also a possible link between the extended use of DA and its increased susceptibility to cardiovascular diseases. Prodrug-based nanoparticles (NPs) have emerged as a promising approach for drug delivery and overcome side effects. In this investigation, a diclofenac acid-based prodrug (DA-P) was synthesized and subsequently used for developing NPs (DA-P-NPs). The developed NPs were further modified with chitosan (DA-P-NPs-CHI) to achieve stability and sustained release of the drug. The DA-P was chemically synthesized and confirmed with EI-mass spectrometry, ¹H-NMR, and ¹³C-NMR spectroscopic techniques. The characterization of DA-P-NPs and DA-P-NPs-CHI involved several techniques, such as atomic force microscopy (AFM and SEM), DLS, FTIR, TGA, and DSC. DA-P demonstrated a reduced critical micelle concentration (CMC) of 0.07 mg/mL and effectively encapsulated more drug within the NPs. DA-P-NPs and DA-P-NPs-CHI exhibited average particle sizes of 130.7 ± 0.6 and 230.2 ± 5.3 nm, and surface charges of -36.2 ± 2.0 and 41.2 ± 0.9 mV, respectively. DA-P-NPs-CHI exhibited a drug-release rate remarkably greater at acidic pH. A paw-edema model was induced <i>via</i> formalin exposure to evaluate the anti-inflammatory effect of DA-P-NPs-CHI. Assessment of anti-inflammatory activity demonstrated that the use of DA-P-NPs-CHI resulted in a substantial reduction in edema compared to diclofenac-treated rats. These findings demonstrate that the proposed DA-P-NPs possess the promising attributes that make them a possible alternative therapy for pain and inflammation.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761698","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}

{"title":"Crafting Superior Photocatalytic Potential: Synergistic Precipitation-Hydrothermal Customization of CTAB-Engineered Co3O4 Nanoparticles","authors":"Arshdeep Kaur,&nbsp;Harpreet Kaur,&nbsp;Sanjeev Kumar,&nbsp;Prit Pal Singh,&nbsp;Kanchan Bala,&nbsp; Supreet,&nbsp;Sunil Kumar,&nbsp;Jyoti Gaur,&nbsp;Sandeep Kaushal,&nbsp;Gautam Singh","doi":"10.1007/s10876-024-02719-5","DOIUrl":"10.1007/s10876-024-02719-5","url":null,"abstract":"<div><p>This study introduces CTAB-loaded Co₃O₄ nanoparticles (NPs) as a highly efficient solution for removing Brilliant Yellow (BY), Reactive Yellow (RY) and Methyl Orange (MO) dye from contaminated water. Synthesized via a co-precipitation and hydrothermal method, these NPs were characterized using UV-Vis, FTIR, XRD, TEM, and SEM. The Co₃O₄ NPs, with a crystallite size of 11.88 nm and an average particle size of 13 nm, achieved 100% photocatalytic degradation of BY dye (120 mg/L) within 140 min. Additionally, the NPs demonstrated promising photocatalytic activity against RY and MO dyes. The synergy between CTAB and Co₃O₄ NPs enhances dye degradation, positioning them as a cost-effective and efficient solution for wastewater treatment. This work highlights the environmental potential of CTAB/Co₃O₄ NPs in addressing water pollution challenges.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761795","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}

{"title":"ZnO/PMMA Nanofibers for the Photocatalytic Water Remediation","authors":"Kinyas Polat,&nbsp;Elif Ant Bursalı,&nbsp;Mürüvvet Yurdakoç","doi":"10.1007/s10876-024-02729-3","DOIUrl":"10.1007/s10876-024-02729-3","url":null,"abstract":"<div><p>In this study, a novel ZnO/PMMA nanofiber catalyst was fabricated using electrospinning, resulting in a barbed wire-like structure that enhances photocatalytic performance. The research aimed to investigate the material’s effectiveness in degrading organic pollutants under UV light, providing a sustainable solution for water purification. Comprehensive characterization techniques, including XRD, XPS, SEM, EDS, and FTIR, were employed to analyze the crystal structure, micromorphology, and elemental composition of the catalyst. Photocatalytic degradation experiments showed that up to 91% degradation was achieved after 60 min of UV light irradiation at pH 11, with no significant bulk adsorption observed, confirming the dominance of the photocatalytic mechanism. The optimized pH of 11 was found to be ideal for achieving high degradation rates. This novel ZnO/PMMA nanofiber structure demonstrates significant potential for environmental applications, particularly in water purification, offering an efficient and sustainable approach to pollutant removal.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761696","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}

{"title":"Development of Gold Nanoparticles Coated with Bismuth Oxide for X-ray Computed Tomography Imaging","authors":"Soichiro Takiguchi,&nbsp;Ayumi Takahashi,&nbsp;Noriko Yamauchi,&nbsp;Shohei Tada,&nbsp;Takumu Takase,&nbsp;Mone Kimura,&nbsp;Kohsuke Gonda,&nbsp;Yoshio Kobayashi","doi":"10.1007/s10876-024-02724-8","DOIUrl":"10.1007/s10876-024-02724-8","url":null,"abstract":"<div><p>Au nanoparticles are promising X-ray contrast agents as their properties could render them useful for long-term diagnostic imaging. However, the surface modification of Au nanoparticles is necessary to improve their biocompatibility and hence, their retention in the body and contrast-enhancing ability. Therefore, in this study, we prepared a colloidal solution of Au nanoparticles coated with bismuth oxide (Bi₂O₃) under stabilization of the coated nanoparticles using polyvinylpyrrolidone (PVP) (Au/Bi₂O₃/PVP) and performed X-ray imaging of a mouse using the Au/Bi₂O₃/PVP nanoparticle colloidal solution. Au nanoparticles with a particle size of 21.9 nm were prepared by reducing Au ions (III) using sodium citrate in water at 80 °C. The Bi₂O₃ coating of the Au nanoparticles was performed in the presence of Au nanoparticles and PVP by precipitation via the reaction of Bi(NO₃)₃ and NaOH in water (Au/Bi₂O₃/PVP). The loading efficiencies of Au and Bi in the Bi₂O₃-coated Au nanoparticles were dependent on the Bi concentration in the Bi₂O₃-coating process, and were 67.2 and 61.8%, respectively, at a Bi concentration of 0.66 × 10⁻³ M. The X-ray imaging ability of the Au/Bi₂O₃/PVP nanoparticle colloidal solution was superior to that of a commercial X-ray contrast agent. One Au/Bi₂O₃/PVP nanoparticle exhibited a computed tomography value larger than that of a Au nanoparticle. The popliteal lymph node of a mouse was identified using the Au/Bi₂O₃/PVP nanoparticle colloidal solution, highlighting the possibility of accurate, long-term observation of the sentinel lymph node using this solution.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761912","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}

{"title":"Eco-Friendly Fabrication of Cr2V4O13 Nanoparticles: A Promising Material for Photocatalysis, Electrochemical Sensing, and Supercapacitor Applications","authors":"Vijay Dubey,&nbsp;Ketan D. Parikh,&nbsp;Ravirajsinh J. Jadav,&nbsp;Devarshi H. Vyas,&nbsp;B. Avinash,&nbsp;C. R. Ravikumar,&nbsp;A. Naveen Kumar,&nbsp;H. Seshagiri Rao,&nbsp;Deepak Kumar,&nbsp;Suresh Ghotekar","doi":"10.1007/s10876-024-02720-y","DOIUrl":"10.1007/s10876-024-02720-y","url":null,"abstract":"<div><p>The rising demand for energy and the adverse effects of pollution on the environments and human health highlight the urgent need for sustainable alternatives. Transition metal oxides are the solution to fulfill future demands. Using a green synthesis approach, this study disclosed a bio-inspired synthesis of chromium tetravanadate nanoparticles (Cr₂V₄O₁₃ NPs). The high-resolution transmission electron microscopy (HRTEM) and field-emission scanning electron microscopy (FESEM) images confirmed the nano-plate-shaped morphology, and the powder X-ray diffraction (PXRD) pattern showed that the Cr₂V₄O₁₃ NPs have a monoclinic phase with an average crystallite size of 25.89 nm. In the Fourier transform infrared (FTIR) spectrum, peaks at 802 and 717 cm^–1 are linked with the stretching bond of V–O–V, whereas peaks at 644, 524, and 482 cm^–1 are associated with Cr–O bond. The optical bandgap of Cr₂V₄O₁₃ NPs was determined using Tauc’s plot of UV-Vis. study and was found to be 2.22 eV. The photodegradation of Cango Red (CR) and Fuchsin Acid (FA) dyes under UV light irradiation was effectively facilitated by the plant-mediated Cr₂V₄O₁₃ NPs, exhibited remarkable photodegradation performance of 71.35% and 53.35% in 120 min, respectively. A carbon paste electrode immersed in 0.1N HCl solution was employed to ascertain the electrochemical features of Cr₂V₄O₁₃ NPs, resulting in the detection of ascorbic acid at a very low 1–5 µM concentration. In cyclic voltammetry evaluation, the Cr₂V₄O₁₃ NPs showed greater sensitivity at various scan rates. Ascorbic acid was finally shown to have exceptional redox reaction and ascorbic acid detection capabilities when it was used as an analyte. Additionally, the energy storage potential of Cr₂V₄O₁₃ NPs has been demonstrated by Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) techniques, and specific capacitance was determined as 171 F/g was obtained at the most efficient 5 mV s⁻¹ scan rate having exceptional long-term cyclic stability with approximately 100% Coulombic efficiency after 2000 GCD cycles. These promising outcomes highlight the fascinating potential for high-performance uses of Cr₂V₄O₁₃ NPs with multifunctionality in diverse applications.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761869","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}

{"title":"Efficient Removal of Cr (VI) and As (V) from Aqueous Solution Using Magnetically Separable Nickel Ferrite Nanoparticles","authors":"Ahmed Anwar Hassan,&nbsp;Yosri A. Fahim,&nbsp;Mohamed Eid M. Ali","doi":"10.1007/s10876-024-02736-4","DOIUrl":"10.1007/s10876-024-02736-4","url":null,"abstract":"<div><p>A promising nickel ferrite (NiFe₂O₄) NPs with excellent magnetic characteristics was synthesized using an aqueous-based reflux approach that eliminates the need for calcination temperature. The magnetic nanoparticles obtained were analysed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and scanning electron microscopy (SEM). The analysis showed that synthesized nickel ferrite had a spherical shape with an average size ranging from 18 to 29 nm. The synthesized nickel ferrite is utilized for the removal of hexavalent chromium (Cr (VI)) and pentavalent arsenic (As (V)) ions from aqueous solution through adsorption method. The removal of Cr (VI) ions achieved a maximum efficiency of 65% after 120 minutes at a pH of 5, with a ferrite dose of 2 g/L and a concentration of Cr (VI) ions of 25 mg/L. while the removal of As (V) at a pH of 5, with a dose of 1 g/L of ferrite and an initial concentration of 25 mg/L of As (V) ions was 77% after 120 minutes. In addition, the data obtained from the isotherms of Langmuir (R² = 0.99, 0.98), Freundlich (R² = 0.86, 0.97) and Temkin (R² = 0.83, 0.97). The adsorption of Cr (VI) ions is governed by a pseudo first-order kinetics process, whereas the adsorption of As (V) ions is governed by a pseudo second-order kinetics reaction. After five adsorption–desorption cycles at the same optimal operating condition, Cr (VI) and As (V) removal efficiency dropped from 65%, 77% to 25%, 30%, respectively.</p></div>","PeriodicalId":618,"journal":{"name":"Journal of Cluster Science","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10876-024-02736-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}