Journal of Sol-Gel Science and Technology最新文献

{"title":"Gallic acid assisted synthesis of novel CuO/Ni/Fe3O4 nanocomposite for catalytic CO2 methanation and photocatalytic hydrogen generation","authors":"Chaima Salmi,&nbsp;Zane Zelca,&nbsp;Salah Eddine Laouini,&nbsp;Souhaila Meneceur,&nbsp;Hamdi Ali Mohammed,&nbsp;Johar Amin Ahmed Abdullah,&nbsp;Mahmood M. S. Abdullah","doi":"10.1007/s10971-024-06608-1","DOIUrl":"10.1007/s10971-024-06608-1","url":null,"abstract":"<div><p>This study investigates the synthesis of CuO/Ni/Fe₃O₄ nanocomposite (NC) using gallic acid, as well as its catalytic performance in CO₂ methanation and photocatalytic hydrogen generation. UV-visible spectroscopy analysis revealed a prominent absorption peak at 370 nm and a band gap energy of 1.26 eV, indicating favorable optical properties for photocatalysis. FTIR analysis identified key functional groups, including a significant O-H peak at 3366 cm⁻¹, C-H stretching at 2926 cm⁻¹, and metal-oxygen bonding vibrations at 580 and 461 cm⁻¹, confirming the presence of Cu-O, Fe-O, and Ni-O bonds, indicative of successful nanoparticle formation. XRD analysis showed distinct peaks at 2θ values corresponding to cubic and monoclinic crystal structures, with calculated crystallite sizes of approximately 30 nm and a surface area of 29 m²/g. The nanocomposite exhibited 37% crystallinity and a density of 6.88 g/cm³. Thermal stability tests revealed only a 5.7% weight loss between 589 and 785 °C. Catalytic tests showed a maximum CO₂ conversion rate of 94.8% at 420 °C, with CH₄ selectivity exceeding 90% across all temperatures. In photocatalytic hydrogen production, the NC achieved an initial rate of 165 µmol/g.h, reaching a total yield of 741 µmol/g after 5 h. The catalyst maintained efficiency over four cycles, highlighting its stability and reusability. These findings emphasize the potential of CuO/Ni/Fe₃O₄ NC as a promising catalyst for sustainable energy production and carbon utilization, combining a green synthesis method with high catalytic efficiency.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"670 - 682"},"PeriodicalIF":2.3,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing low field magnetoresistance in La0.7Ca0.25Sr0.05MnO3/Mn3O4 composite nanoparticles: unveiling its transport mechanism","authors":"Jumaeda Jatmika,&nbsp;Suci Winarsih,&nbsp;Agung Imaduddin,&nbsp; Risdiana","doi":"10.1007/s10971-024-06627-y","DOIUrl":"10.1007/s10971-024-06627-y","url":null,"abstract":"<div><p>This work explores the low-field magnetoresistance (LFMR) and transport properties of La_0.7Ca_0.25Sr_0.05MnO₃/Mn₃O₄ composite nanoparticles synthesized via the sol-gel method and sintered at temperatures from 700 °C to 900 °C. We investigate particle size (28–32 nm), Mn₃O₄ fraction, structural phases, and their effects on resistivity and LFMR. Rietveld refinement confirms the coexistence of distorted monoclinic and spinel structures, with an increasing Mn₃O₄ fraction correlating to notable shifts in resistivity and LFMR. Temperature-dependent resistivity measurements reveal a transition from metallic to insulator state, with the 30 nm particle and 19% Mn₃O₄ exhibiting lowest resistivity due to reduce in grain boundary effects and the highest conduction bandwidth. A non-monotonous dependence of resistivity at different particle size and Mn₃O₄ fraction has been observed. It is suggested that resistivity in our composite system is influenced by the interplay of grain boundary contributions, Mn₃O₄ phase distribution, and conduction bandwidth. LFMR reaches up to 30% at 5 K and 5 kOe, exceeding values in similar composite systems. These results emphasize the role of Mn₃O₄ as an insulating phase and highlight the impact of nanoparticle size on the enhancement of LFMR, offering insights into optimizing LFMR in such composites.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"399 - 412"},"PeriodicalIF":2.3,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of MnAl2O4/Ni3Se2 nanocomposite for enhanced electrocapacitive performance","authors":"Younis Ejaz,&nbsp;Sarah A. Alsalhi,&nbsp;Ashraf Muhammad,&nbsp;Mahmood Ali,&nbsp;Muhammad Saleem,&nbsp;Muhammad Aslam","doi":"10.1007/s10971-024-06615-2","DOIUrl":"10.1007/s10971-024-06615-2","url":null,"abstract":"<div><p>Fossil fuel utilization leads to environmental pollution and depletion of energy supplies, prompting the preparation of environmentally friend and advanced energy storage devices. In the present research, we synthesize the MnAl₂O₄/Ni₃Se₂ nanocomposite via an effective sonication method as supercapacitor electrode material. The MnAl₂O₄/Ni₃Se₂ nanocomposite demonstrated a higher specific capacitance (1659.67 F/g), energy density (51.18 Wh/kg) along with a power density (235.6 W/kg) at 1 A/g determined from galvanostatic charge-discharge plot which demonstrated cyclic stability of 25 h over 5000^th cycle. Furthermore, compared to pure Ni₃Se₂ (0.72 Ω), MnAl₂O₄/Ni₃Se₂ nanocomposite material exhibited a low charge transfer resistance (0.39 Ω) calculated via the Nyquist plot. The small surface area of Ni₃Se₂ had been improved with the inclusion of MnAl₂O₄ in the fabrication of MnAl₂O₄/Ni₃Se₂ nanocomposite leading to enhance surface area, more active sites and lower resistance responsible for improvement in nanocomposite electrochemical properties. This work revealed that developed nanocomposite’s energy-storing qualities make it suitable as an electrode material in supercapacitors.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"473 - 485"},"PeriodicalIF":2.3,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced luminescence and visible-light photodetection performance of novel Bi, Sm, and Bi:Sm co-doped CdS nanostructured thin films developed via nebulizer spray pyrolysis technique","authors":"Mohd Shkir","doi":"10.1007/s10971-024-06622-3","DOIUrl":"10.1007/s10971-024-06622-3","url":null,"abstract":"<div><p>Our novel research presented the development of CdS thin films for photodetectors with significantly enhanced photosensing performances. This was achieved using Bi and Sm dopants. For the first time, we successfully developed pure CdS, Bismuth-doped CdS (CdS:Bi), samarium-doped CdS (CdS:Sm), and Bi and Sm co-doped CdS (CdS:Bi:Sm) films using facile nebulizer spray pyrolysis (NSP) route. The structural analysis by X-ray diffraction (XRD) confirmed the hexagonal phase of CdS, with a polycrystalline nature. The crystallite size was 56, 63, 68, and 59 nm for the CdS, CdS:Bi2%, CdS:Sm2%, and CdS:Bi2%:Sm2% films. The elemental composition and presence of every element in the developed films were confirmed by energy-dispersive X-ray spectroscopy (EDX) analysis. The field emission scanning electron microscopy (FESEM) study revealed distinct changes in the surface morphology. Photoluminescence (PL) study showed the enhancement of emission intensity with doping, and the highest intensity was noticed for CdS:Sm2% films, and intense green and red emission peaks at ~521 ± 2 nm and 681 ± 3 nm were observed in all films. The optical absorption spectra revealed that there was a shift in absorption edge due to doping, which led to a change in the energy gap of CdS films, and the values of the energy gap were found to be reduced from 2.39 eV to 2.29 eV (ΔE = 0.1 eV). Furthermore, the grown films were used to develop photodetectors and investigate their key photosensing parameters. The photodetector developed with CdS:Sm2% film showed the maximum responsivity (R), detectivity (D*), quantum efficiency (EQE), and rise and fall time compared to all other photodetectors. The values of R, EQE, D*, were found to be 0.3  AW^-1, 70%, and 1.59 × 10¹⁰Jones, for CdS:Sm2% films-based photodetector, which was ~5 times higher than pure CdS films-based photodetector. The rise and fall times of the developed CdS:Sm2% devices were found to be 0.94 s and 0.32 s, which were very quick compared to pure. These outcomes signified that the developed photodetectors based on CdS:Sm2% films possessed significantly enhanced values compared to others. However, the photodetector performance improved for each dopant and co-dopant compared to pure. Hence, the developed photodetectors based on Bi and Sm dopants were more suitable for photosensing applications with enhanced performances.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"331 - 343"},"PeriodicalIF":2.3,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of mesoporous CrB particles synthesized via sol-gel method as potential antibacterial interior paint nano-additive","authors":"Bilge Coşkuner Filiz,&nbsp;Yeliz Basaran Elalmis,&nbsp;Melda Altıkatoğlu Yapaöz,&nbsp;Aysel Kantürk Figen","doi":"10.1007/s10971-024-06625-0","DOIUrl":"10.1007/s10971-024-06625-0","url":null,"abstract":"<div><p>Antibacterial particles are increasingly explored as additives to improve the health and safety properties of interior paints. This report introduces evaluation of CrB particles as an potential antibacterial additive into paints. The CrB particles were synthesized by sol-gel method in presence of chrome salt, citric acid as alkoxide agent and boric acid precursor followed by nitrate combustion process. The effect of elemental ratio (Cr:B = 1:3 and 3:1) and calcination process (250–550 °C) on the antibacterial activity of the particles were investigated against gram negative <i>Escherichia coli (E. coli, ATCC 25922)</i> and gram positive <i>Staphylococcus aureus (S. aureus, ATCC 25923)</i>. Statistical analysis of antibacterial activity results and synthesis parameters via interaction plots and ANOVA analysis indicated that lower Cr:B ratio (Cr:B = 1:3) and higher calcination temperature (550 °C) resulted in improved particle activity over both gram negative and positive bacteria growth. The amorphous Cr₁B₃@550 codded particles with structural characteristics of 47 m²/g surface area, 12 nm pore size and 150 µm accumulated particles with 50 nm size were used as antibacterial additives for wall paint, which improved antibacterial activity performance by %75 for <i>S. aureus</i> and %63 for <i>E. coli</i>.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"655 - 669"},"PeriodicalIF":2.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the properties of perovskite oxide based electrocatalysts for oxygen evolution reaction (OER)","authors":"Areej S. Alqarni,&nbsp;Arooj Fatima,&nbsp;Abhinav Kumar,&nbsp;A. Dahshan","doi":"10.1007/s10971-024-06616-1","DOIUrl":"10.1007/s10971-024-06616-1","url":null,"abstract":"<div><p>Developing an efficient electrocatalyst for water splitting is imperative to improve the slow OER and store electrical energy as H₂ fuel. Creating an inexpensive development process for an effective OER electrocatalyst with features like a lot of active sites, a huge surface area (SA) and remarkable stability is vital for producing more H₂ and making it more widely available. We created the CoTiO₃/rGO nanocomposite using hydrothermal method in basic solution to improve OER kinetics. The morphological structure of the CoTiO₃/rGO was varied, showing CoTiO₃ nanoparticles anchored on rGO nanosheets to increase the electrolyte ions’ SA for adsorption. The CoTiO₃/rGO electrocatalyst performs better than CoTiO₃, as shown by its remarkable 38 h durability and overpotential (185 mV) at 10 mA/cm². Additionally, compared to CoTiO₃ (56 mV/dec), the CoTiO₃/rGO nanocomposite has a decreased Tafel slope (35 mV/dec). The larger SA and active site of the nanocomposite enhaned electrochemical characteristics of CoTiO₃/rGO nanocomposite. The combination of a metal oxide with material produced from carbon offers a promising first step toward making an exceptional electrocatalyst for use in water electrochemistry.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"386 - 398"},"PeriodicalIF":2.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A zinc titanate-based floatable composite for photocatalytic degradation of azophloxine","authors":"Shuai Zhang,&nbsp;Wenjie Zhang,&nbsp;Minghua Wang","doi":"10.1007/s10971-024-06626-z","DOIUrl":"10.1007/s10971-024-06626-z","url":null,"abstract":"<div><p>Zinc titanate was loaded onto expanded perlite (EP) by a sol-gel method to obtain a floatable ZnTiO₃/EP composite photocatalyst. The 28%ZnTiO₃/EP particles were well dispersed in water under gentle stirring, and they were also easily collected on the top of the treated water. ZnTiO₃ crystals in the ZnTiO₃ and 28%ZnTiO₃/EP samples were 43.5 and 38.5 nm in size, respectively. The bandgap energies of ZnTiO₃ and 28%ZnTiO₃/EP were determined to be 3.96 and 3.69 eV, respectively. EP contained large pores in the size of several micrometers, but it did not have small pores. The specific surface area of 28%ZnTiO₃/EP was determined to be 1.11 m²/g. The azophloxine degradation efficiencies of ZnTiO₃ and 28%ZnTiO₃/EP after 30 min of irradiation were determined to be 100 and 34.7%, respectively. A total of 94.8% of the azophloxine molecules were degraded on 28%ZnTiO₃/EP after 100 min of reaction.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"647 - 654"},"PeriodicalIF":2.3,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, optical and electrochemical properties of a new phosphate-based compounds Na2Mn2−xNixFe(PO4)3 as negative electrode for sodium-ion batteries","authors":"Nour El Hoda Bouftila,&nbsp;Abdelhak Chouiekh,&nbsp;Hasna Aziam,&nbsp;Abdelilah Rjeb,&nbsp;Abdessamad Faik,&nbsp;Ismael Saadoune,&nbsp;Yahya Ababou,&nbsp;Mohamed Naji","doi":"10.1007/s10971-024-06614-3","DOIUrl":"10.1007/s10971-024-06614-3","url":null,"abstract":"<div><p>The development of attractive negative electrode materials with high energy density, excellent structural stability and safety is crucial to advance the practical applications of sodium-ion batteries in the market. Hence, the combination of abundant and environmentally benign elements (such as sodium, iron and phosphorus) with the use of polyanionic frameworks holds significant promise. Herein, we report the synthesis, crystal structure, and the electrochemical properties of a series of new compounds belonging to the Alluaudite family Na₂Mn_2−xNi_xFe(PO₄)₃ (where x = 0.6, 1.6). These materials were successfully prepared by co-precipitation method, and thoroughly characterized using X-Ray Diffraction analysis, Raman Spectroscopy, Scanning Electron Microscopy, UV vis spectroscopy and impedance spectroscopy technique. Their electrochemical behavior as anode materials for Sodium ion batteries was investigated by the galvanostatic charge–discharge cycling at C/5 current rate and over 0.1–3.6 V voltage range. Initial discharge capacities of 340 mAh g⁻¹ and 370 mAh g⁻¹ were respectively achieved during the first cycle by Na₂Mn_1.4Ni_0.6Fe(PO₄)₃ and Na₂Mn_0.4Ni_1.6Fe(PO₄)₃, corresponding to an irreversible reaction where about seven sodium ions per formula unit were stored. In fact, fewer Na ions were involved in the electrochemical reaction during the subsequent charge and discharge cycles, indicating that this material undergoes an irreversible conversion-type reaction.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"374 - 385"},"PeriodicalIF":2.3,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel stratagem for synthesis of S-scheme Ag3PO4/ZnO nanocomposites by sol-gel assisted sonochemical route for removal of rhodamine B under visible light radiations","authors":"Ali Alsalme,&nbsp;M. Fayez,&nbsp;Nagy N. Mohammed,&nbsp;Khaled Mohamed,&nbsp;Mohamed Maher,&nbsp;M. F. Abdel-Messih,&nbsp;Ayman Sultan,&nbsp;M. A. Ahmed","doi":"10.1007/s10971-024-06610-7","DOIUrl":"10.1007/s10971-024-06610-7","url":null,"abstract":"<div><p>In this research work, S-scheme Ag₃PO₄/ZnO heterojunctions were synthesized by sol-gel assisted sonochemical route for photocatalytic degradation of rhodamine B dye under visible radiations. ZnO nanoparticles were synthesized by controlled sol-gel route using pluronic as pore directing templating agent. Various concentration of Ag₃PO₄ [0–20] wt% were coupled with ZnO sonochemically for generating S-scheme Ag₃PO₄/ZnO heterojunctions with strong redox power in degrading RhB dye. The physicochemical properties of the as-synthesized samples were monitored by [XRD], N₂-adsorption-desorption isotherm, [HRTEM], [DRS], Mapping, [PL], [EDX] and [XPS] devices. HRTEM analysis implied the controlled distribution of spherical Ag₃PO₄ on localized active sites of ZnO surface. The experimental results implied that incorporating 15 wt% of Ag₃PO₄ on ZnO surface increased the surface area from 4 to 22 m²/g implying the production of more available active sites. The visible light absorbability of ZnO was greatly enhanced with incorporating various proportions of Ag₃PO₄ which ascribed to the narrow band gap energy of Ag₃PO₄ [2.4 eV]. The experimental results revealed that photocatalytic efficiency of the a-synthesized samples increased with introducing various proportions of Ag₃PO₄ on ZnO surface due to generation of S-scheme Ag₃PO₄/ZnO heterojunctions with superior charge carriers separation and transportation. Scavenger trapping experiments revealed that hydroxyl and superoxide radicals exhibited a crucial role in destructing RhB dye under light illumination. The novel S-scheme Ag₃PO₄/ZnO is considered a promising candidate for destructing organic pollutants in wastewater.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"952 - 969"},"PeriodicalIF":2.3,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly synthesis of silver nanoparticles via Cassava starch: structural analysis and biocidal applications against aedes aegypti and pathogenic bacteria","authors":"Cindel C. de Souza,&nbsp;Glenda Q. Ramos,&nbsp;Ricardo de M. Katak,&nbsp;Veranilce A. Muniz,&nbsp;Rosemary A. Roque,&nbsp;Nilson S. Ferreira,&nbsp;Robert S. Matos,&nbsp;Yutao Xing,&nbsp;Henrique D. F. Filho","doi":"10.1007/s10971-024-06606-3","DOIUrl":"10.1007/s10971-024-06606-3","url":null,"abstract":"<div><p>This study presents the eco-friendly synthesis of silver nanoparticles (AgNPs) using cassava starch via the sol-gel method, offering a sustainable approach with significant biocidal properties. Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) confirmed the formation of spherical AgNPs ranging in size from 18 to 75 nm. After calcination at 200 °C, the nanoparticles displayed a cubic crystalline structure, as indicated by crystallographic planes (111), (200), (220), (311), and (222) in the XRD analysis. Morphological analysis via field-emission scanning electron microscopy (FESEM) revealed predominant particle sizes of 25 nm and 64 nm. Energy-dispersive X-ray spectroscopy (EDS) confirmed silver as the main constituent (48.5%), along with smaller amounts of carbon and oxygen (45.6% and 5.9%, respectively). Antimicrobial tests revealed significant inhibition zones against <i>Staphylococcus aureus</i>, <i>Klebsiella pneumoniae</i>, and <i>Escherichia coli</i>, with maximum inhibition of 12.08 mm for S. aureus at a concentration of 100 µg/mL. These results highlight the potent antibacterial activity of the synthesized AgNPs against both Gram-positive and Gram-negative bacteria. The AgNPs also demonstrated strong larvicidal and pupicidal activity against Aedes aegypti mosquitoes. Larval mortality exceeded 90% after 72 h, with LC50 and LC90 values of 0.06 mg/mL and 0.07 mg/mL, respectively. Pupal mortality similarly surpassed 90%, with LC50 values of 0.03 mg/mL and LC90 values of 0.06 mg/mL after 72 h. These findings emphasize the efficacy of the nanoparticles in mosquito control, even at low concentrations. This study is the first to use cassava starch as both a reducing and stabilizing agent in the synthesis of AgNPs, underscoring its potential as an environmentally safe and cost-effective alternative for controlling vector-borne diseases and bacterial infections.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"518 - 533"},"PeriodicalIF":2.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}