Journal of Sol-Gel Science and Technology最新文献

{"title":"Optimization of Candida antarctica lipase immobilization in xerogels using an ionic liquid additive: enhanced esterification activity and thermal stability","authors":"Paloma Truccolo Reato,&nbsp;Adriele Sabrina Todero,&nbsp;Fabiana de Oliveira Pereira,&nbsp;Rogério Marcos Dallago,&nbsp;Marcelo Luis Mignoni","doi":"10.1007/s10971-024-06656-7","DOIUrl":"10.1007/s10971-024-06656-7","url":null,"abstract":"<div><p>The immobilization of Candida antarctica lipase B (CALB) within xerogels synthesized through the sol-gel method was investigated, employing the ionic liquid 1-octyl-3-methylimidazolium bromide (C₈MI.Br) as an additive to enhance enzymatic performance. The optimization of enzyme mass and ionic liquid concentration, using a central composite experimental design, identified optimal conditions of 0.27 g/mL enzyme and 1.53% ionic liquid, yielding a maximum total esterification activity exceeding 500 U. Structural characterization, including BET surface area analysis and X-ray diffraction, confirmed the formation of a porous, amorphous matrix conducive to enzyme stability and activity. The incorporation of the ionic liquid significantly enhanced the xerogels’ thermal and operational stability. Residual esterification activity was maintained at approximately 80% after 100 days under refrigeration, and the xerogels exhibited reusability for up to eight catalytic cycles with residual activity above 50%. Furthermore, thermal stability assessments demonstrated superior resistance of the immobilized enzyme to elevated temperatures compared to its free counterpart. This study underscores the critical role of ionic liquids as additives, facilitating the formation of structurally optimized xerogels while preserving enzyme activity and stability. The findings suggest significant potential for industrial biocatalytic processes, offering a sustainable and efficient approach to enzyme immobilization for applications requiring enhanced catalytic performance and longevity.</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":"737 - 748"},"PeriodicalIF":2.3,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423438","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":"Determination of doping strategy on the electrochemical performance of the hydrothermally prepared perovskite material","authors":"Soumaya Gouadria,&nbsp;Muhammad Abdullah,&nbsp;F. F. Alharbi,&nbsp;Salma Aman,&nbsp;Hafiz Muhammad Tahir Farid","doi":"10.1007/s10971-024-06638-9","DOIUrl":"10.1007/s10971-024-06638-9","url":null,"abstract":"<div><p>Clean energy from renewable resources has attained more and more attention in recent years, because of this, there has been a shift in emphasis towards creating renewable, environmentally benign and economically viable alternatives to fossil fuels. However, finding an effective and long-term electrocatalyst for enabling OER in electrochemical water splitting is extremely sought after of this significant challenge. In this study, straightforward and efficient sonication method was employed to produce Sm-doped MnSnO₃ as an electrocatalyst for OER. Furthermore, electrocatalytic properties of Sm-doped MnSnO₃ was quite impressive, with least overpotential (η) of 210 mV needed to attain current density (C_d) of 10 mA cm⁻². In addition, Sm-doped MnSnO₃ electrocatalyst demonstrates least Tafel slope with value of 32 mV dec⁻¹. Further, Sm-doped MnSnO₃ electrocatalyst also exhibits remarkable stability and low impedance characteristics, resulting in improved performance in oxygen evolution reaction (OER). These findings suggest that the current Sm-doped MnSnO₃ has great potential as an electrocatalyst for facilitating the OER in hydrogen energy production.</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":"617 - 626"},"PeriodicalIF":2.3,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109403","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":"Sol-gel spin coating of ZnO thin films for hydrophobic and radiation resistant applications","authors":"Venkatesh Yepuri,&nbsp;Saravanan Sigamani,&nbsp;Veluri Swaminadham","doi":"10.1007/s10971-024-06652-x","DOIUrl":"10.1007/s10971-024-06652-x","url":null,"abstract":"<div><p>There is a significant demand for coatings that can withstand radiation in nearly every region globally, particularly where glass furnishings are utilized. These coatings are capable of reflecting radiation from the solar spectrum while also functioning as self-cleaning surfaces that eliminate pollutants from the glass. Nonetheless, scientists are persistently investigating methods to cost-effectively manufacture these coatings for application across diverse industries. This study focuses on the effective production of Zinc Oxide (ZnO) thin films through sol-gel spin coating techniques, intended for application on glass surfaces. The goal is to enhance these surfaces with UV and IR reflection capabilities, alongside hydrophobic characteristics that repel water and promote a self-cleaning effect. The analysis via X-ray Diffractogram (XRD) demonstrated that the coating exhibited a hexagonal Wurtzite crystal structure of ZnO. The study conducted using Fourier Transform Infrared (FTIR) provided additional confirmation of the presence of Zn and O functional linkages at distinct wavenumbers, specifically 733 cm⁻¹ and 2896 cm⁻¹, respectively. Field emission scanning electron microscopy (FESEM) was employed to analyze the thickness of the ZnO layer. The findings indicated the development of a slender layer measuring around 46 nm in thickness. Elemental analysis utilizing EDAX validated the detection of Zinc and Oxygen, with Zinc representing 32% of the atomic weight percentage and Oxygen comprising 68%. Furthermore, the coatings’ resistance to radiation was evaluated through ultraviolet visible and near-infrared spectroscopy (UV-VIS-NIR). The findings indicated that a mere single layer of Zinc Oxide was capable of reflecting 50% of ultraviolet light and 45% of infrared light. After conducting experiments with a goniometer, it was observed that the ZnO coating (500 °C) demonstrated hydrophobic property when in contact with a water droplet, showing a contact angle of ~120°.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Graphical abstract depicting the fabrication of ZnO thin films and the subsequent analysis of their properties.</p></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"708 - 716"},"PeriodicalIF":2.3,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423120","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":"Impact of withdrawal speed on the properties of CuO films deposited via sol-gel dip coating","authors":"Nur Amaliyana Raship,&nbsp;Siti Nooraya Mohd Tawil,&nbsp;Mohd Zainizan Sahdan,&nbsp;Nurliyana Mohamad Arifin","doi":"10.1007/s10971-024-06648-7","DOIUrl":"10.1007/s10971-024-06648-7","url":null,"abstract":"<div><p>The growing demand for superior gas sensors has led researchers to increasingly focus on materials characterization, given its critical role in enhancing gas sensing capabilities. In this study, different withdrawal speeds were investigated on the properties of CuO films deposited using the sol-gel dip-coating technique. The findings revealed that the optimal conditions for the CuO film were achieved at a withdrawal speed of 70 mm/min. The XRD results indicated that all CuO films exhibits pure CuO phase resembling higher crystallinity and larger crystallite sizes. Surface morphology from FESEM analysis revealed more uniform surfaces and well-developed flower-like structures. For AFM results, topology images showed a smoother surface with low roughness. Surface profiler measurements observed that the film thickness have direct relationship toward withdrawal speeds, showing an optimal thickness and thinner films are at lower withdrawal speed. By utilizing the four-point probe, electrical resistivity measurements revealed a higher quality of structural and surface properties of films consequently led to a decrease in electrical resistivity. The results indicate that CuO films deposited at 70 mm/min have favorable features for gas sensor applications, highlighting the importance of withdrawal speed in optimizing film properties towards sensor performance.</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":"606 - 616"},"PeriodicalIF":2.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109058","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":"Synergistic effects of SrCeO3-ZnTe heterostructures on oxygen evolution reaction performance","authors":"Kareem Yusuf,&nbsp;Tauseef Munawar,&nbsp;Nadir Abbas,&nbsp;Iram Manzoor,&nbsp;Abdul Ghafoor Abid,&nbsp;Zobia Siddique,&nbsp;Jafar Hussain Shah","doi":"10.1007/s10971-024-06640-1","DOIUrl":"10.1007/s10971-024-06640-1","url":null,"abstract":"<div><p>Hydrogen production through water splitting is considered a promising strategy to produce renewable energy to mitigate energy and environmental challenges simultaneously. However, the critical challenge is to overcome the difficulties associated with the rate-determining step of water splitting, which is the oxygen evolution reaction (OER). New materials and strategies are highly demanded to overcome this vital issue. Considering the importance of the topic, in this study, we have synthesized a novel and cost-effective hetero-structured material (SrCeO₃-ZnTe) using a facile sonochemical and hydrothermal synthesis route to employ for OER. X-ray diffraction (XRD), Fourier-Transform Infra-red Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Transmission electron Microscopy (TEM), Energy-Dispersive X-ray spectroscopy (EDS) analysis were employed to study the structural and physicochemical properties of the as-prepared SrCeO₃-ZnTe. Compared to the individual electrocatalysts (SrCeO₃ and ZnTe), the heterostructure showed the ability of robust electron transferring and diffusion due to defective site interactions between ZnTe and SrCeO₃, as confirmed via cyclic voltammetry (CV). Thus, the SrCeO₃-ZnTe nanocomposite showed a lower overpotential of 310 mV and a smaller Tafel slope of 36 mV.dec⁻¹ and enhanced stability for 30 h without any significant losses in current density as confirmed via chronoamperometry. The remarkable OER performance of the synthesized heterostructure electrocatalyst was attributed to the synergistic effects of both individual ZnTe and SrCeO₃ acting synergistically in the heterostructure.</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":"592 - 605"},"PeriodicalIF":2.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108613","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":"Green synthesis strategy of CeO2 nanowires, WO3 nanoparticles and CeO2@WO3 nanocomposites by using (Azadirachta Indica) leaf extract: its surface defects, Ce3+/W5+ ratio for their enhanced antibacterial activity","authors":"Kanwal Javed,&nbsp;Sobia Kousar,&nbsp;Bushra Begum,&nbsp;Ali Rizwan,&nbsp;Yifan Liu,&nbsp;Zhenhao Cao,&nbsp;Xue Li","doi":"10.1007/s10971-024-06643-y","DOIUrl":"10.1007/s10971-024-06643-y","url":null,"abstract":"<div><p>This work presented the green synthesis of cerium oxide (CeO₂), tungsten oxide (WO₃) nanoparticles (NPs) and CeO₂/WO₃ nanocomposites (NCs) via simple precipitation method by using the leaf extract of the <i>Azadirachta Indica</i> (<i>A. indica</i>) plant. The morphological, structural, chemical composition, Ce³⁺/W⁵⁺ ratio and optical properties of all the synthesized samples were inspected by various techniques i.e. SEM, EDX, FT-IR, XRD, UV-vis, contact angle, Raman spectroscopy, XPS and zeta potential (ζ). The formations of single phase of CeO₂ and WO₃ NPs were confirmed through structural examination and no impurity signals were detected. The estimated crystallite’s size for CeO₂ nanowires (NW) is ~2 nm with SD ± 0.1–0.2, for oval stone like (OS) WO₃ NPs, the size is ~9.8 nm with SD ± 0.2–0.5, while for the CeO₂/WO₃ NCs it is about ~5.5 nm with SD is ±0.1–0.3 respectively was studied by XRD. The samples were tested as an antibacterial agent against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>), and it was confirmed that they had greater antibacterial effects as compared to the negative (-ve) control group (water) which showed no response (0%). The antibacterial effect of pure CeO₂ and WO₃ NPs was also compared with the CeO₂/WO₃ NCs and predicted that these NCs showed excellent antibacterial activity (100%) verses pure NPs (70–80%) at the same 0.2 mg/L concentration for <i>E. coli</i>. While against <i>S. aureus</i> strain the CeO₂/WO₃ NCs also showed (90%) antibacterial action at the lowest concentration (0.2 mg/L) but 100% as the concentration increases i.e. 0.5 mg/L due to difference in the bacterial strain as compared to the pure NPs which showed good response at 5 mg/L. Furthermore, the detailed mechanism and the characteristics properties of the pure green synthesized CeO₂, WO₃ NPs as well as CeO₂/WO₃ NCs behind their antibacterial effects specifically at lowest concentrations are rarely studied, therefore, in this paper we elaborated the mechanisms of these NPs and NCs distinctly which is important for the development of more effective and unique antibacterial materials.</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":"496 - 517"},"PeriodicalIF":2.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108390","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":"Water and stress tension dual-response antifreeze conductive hydrogel with optically tunable behavior and sensing applications","authors":"Bailin Dai,&nbsp;Shaoji Wu,&nbsp;Youwei Li,&nbsp;Zeyun Li,&nbsp;Liang Gong,&nbsp;Jianxin Tang,&nbsp;Li Tang","doi":"10.1007/s10971-024-06583-7","DOIUrl":"10.1007/s10971-024-06583-7","url":null,"abstract":"<div><p>Conductive hydrogels have been widely used in flexible electronics, soft robotics, and health monitoring due to their high stretchability, tunable conductivity, and biocompatibility. However, the weak mechanical properties and low environmental resistance of conductive hydrogels limit their applications. Herein, based on multiple hydrogen bonds and ionic crosslinking strategies, an ionic conductive AlCl₃/poly(acrylamide-co-methyl methacrylate) [AlCl₃/P(AM-co-MMA)] hydrogel containing DMSO/H₂O binary solvent system was prepared. The obtained hydrogel not only possessed a tensile stress/strain of 1.74 MPa/803% but also showed excellent environmental resistance, remaining flexible at −40 °C. In addition, benefiting from the in-situ phase separation and recovery of MMA hydrophobic chains in water and DMSO/H₂O solution, the hydrogel could realize the optical transition from milky white to transparent, which could be used for information writing and erasure encryption. Furthermore, a flexible sensor based on the hydrogel was fabricated, which exhibited a sensitivity of 0.41, a detection range of 1–400%, and a response time of 300 ms, respectively, capable of being used for human motion detection. Overall, this work provided a new idea for the integrated application of conductive hydrogels with multiple outstanding functions.</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":"696 - 707"},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423452","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":"Tunning the optoelectronic properties of Sm3+-doped mesoporous TiO2 thin films via PVP assisted sol-gel process for solar cells","authors":"A. G. Chávez-Pérez,&nbsp;J. Escorcia-García,&nbsp;L. A. González,&nbsp;O. Reyes-Vallejo","doi":"10.1007/s10971-024-06631-2","DOIUrl":"10.1007/s10971-024-06631-2","url":null,"abstract":"<div><p>Mesoporous TiO₂ thin films with adequate characteristics like high specific surface area and improved light harvesting properties are required for their use as photoanodes in semiconductor-sensitized solar cells. Hence, the optimization of the structure, morphology, chemical composition, and optical properties of Sm³⁺-doped mesoporous TiO₂ films via the PVP (0–0.5 g) assisted sol-gel method is investigated. The results indicate that low PVP contents in the synthesis process promote an improvement in the porosity of the film by causing the dispersion of the TiO₂:Sm³⁺ nanoparticles and, consequently, the formation of a mesoporous structure. However, the average particle size and porosity are reduced for PVP contents above 0.3 g. A similar behavior is found for crystallite size, varying between 16–18 nm. Furthermore, the film thickness is increased (92–233 nm) with the PVP content (0–0.5 g) due to the increased viscosity of the precursor solution used for depositing the films. Interestingly, PVP causes defects and oxygen vacancies that are related to the distortion of the TiO₂ crystal lattice, causing a decrease in the <i>E</i>_<i>g</i> (3.32–3.07 eV). Despite these defects, all the films exhibit the pure anatase phase, as demonstrated by XRD and Raman. Additionally, the films are highly luminescent under n-UV excitation, reaching a maximum intensity for 0.1 g of PVP. Results on the evaluation of Sb₂(S/Se)₃-sensitized solar cells indicate the best performance by using films processed with 0.3 g of PVP exhibiting a <i>V</i>_<i>oc</i> of 449 mV and <i>J</i>_<i>sc</i> of 5.026 mA/cm².</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>The mp-TiO₂:Sm³⁺ thin films are synthesized via the sol-gel synthesis process with different PVP content (0–0.5 g), obtaining the best characteristics of porosity, mean particle size, and crystallite size for 0.1 g. Results show that all the films have a pure crystalline anatase phase with good optical properties, such as high luminescence. Evaluating these films as photoanodes in Sb₂(S/Se)₃-sensitized solar cells improves PCE by adding 0.3 g PVP.</p></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 3","pages":"985 - 1000"},"PeriodicalIF":2.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423238","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":"Graphene oxide-mediated green synthesis of Ag, Co3O4 and ZnO nanocomposites for multifunctional antimicrobial applications","authors":"Rabia Manzar,&nbsp;Sajid Mahmood,&nbsp;Muhammad Akhyar Farrukh,&nbsp;Qandeel Laraib,&nbsp;Rabia Nawaz,&nbsp;Muhammad Tariq Qamar,&nbsp;Ammar Zidan,&nbsp;İsmail Seçkin Çardaklı,&nbsp;Ali Motameni,&nbsp;Shahid Iqbal,&nbsp;Khalid M. Alotaibi","doi":"10.1007/s10971-024-06634-z","DOIUrl":"10.1007/s10971-024-06634-z","url":null,"abstract":"<div><p>This paper presents the antibacterial and antifungal activities of Ag/GO, Co₃O₄/GO, and ZnO/GO nanocomposites prepared using <i>Moringa oleifera</i>. The composite nature of the materials was confirmed due to the presence of principal peaks of GO, Ag, Co₃O₄ and ZnO in the UV–visible absorption spectra at 230, 420, 315, and 380 nm, respectively. The absorption data was further analyzed to estimate the bandgap energy of the nanocomposites. The formation of ZnO and Co₃O₄ in the GO nanocomposites was also verified due to the appearance of Zn–O and Co–O bands in FTIR spectra. However, the absence of Ag–O band in FTIR analysis further verified the formation of only Ag in the Ag/GO nanocomposite. The X-ray diffraction (XRD) analysis also revealed the existence of preferential diffractions due to hexagonal ZnO and cubic Ag and Co₃O₄ in the XRD patterns of GO nanocomposites. Moreover, the average crystallite sizes were found to be 53.10, 84.05, and 86.41 nm for ZnO/GO, Ag/GO, and Co₃O₄/GO nanocomposites, respectively. The crystallite size of GO content was noticed 18.39, 27.58, and 44.14 nm in Co₃O₄/GO, ZnO/GO, and Ag/GO nanocomposites, respectively. This increase in GO crystallite size was also correlated with the decrease in bandgap energy of Co₃O₄/GO (2.77 eV), ZnO/GO (2.62 eV) and Ag/GO (2.42 eV) nanocomposites, respectively. Thermal study revealed the higher stability of ZnO/GO nanocomposite in comparison to Co₃O₄/GO and Ag/GO nanocomposites. The different surface morphologies were noticed in scanning electron micrographs of the nanocomposites. Moreover, the antibacterial and antifungal activity studies demonstrated higher activity posed by ZnO/GO nanocomposite than Ag/GO and Co₃O₄/GO while using five Gram-positive bacteria, eleven strains of Gram-negative and six filamentous fungi.</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":"573 - 591"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108604","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":"Chelating agent assisted BiFeO3 nanostructured material for visible light induced photocatalytic degradation of methylene blue dye","authors":"Nilesh N. Mharsale,&nbsp;Swarada G. More,&nbsp;Manoj A. More,&nbsp;Sarika D. Shinde,&nbsp;Ganesh E. Patil,&nbsp;Sanjay R. Gadakh","doi":"10.1007/s10971-024-06644-x","DOIUrl":"10.1007/s10971-024-06644-x","url":null,"abstract":"<div><p>Bismuth Ferrite (BiFeO₃) nanostructured materials were synthesized by sol-gel method using Ethylenediaminetetraacetic acid (EDTA) and glycine (GL) as chelating agents at different synthesis conditions. The synthesized BiFeO₃ (BFO) material was characterized by using Scanning electron microscopy (SEM), X-ray powder diffractometry (XRD), UV visible spectroscopy and Fourier infrared spectroscopy technique (FTIR) for investigating the structural and optical properties. The presence of chelating agents (EDTA and GL) influences the crystallite size, morphology and degradation efficiency of BFO. Analysis by scanning electron microscopy revealed morphological changes of BFO from nanoparticles to multilayered nanosheet-like structures after changing the chelating agent. The XRD pattern indicated the triclinic crystal system of BFO with the co-existence of mixed phases. The average crystallite size measured using Scherrer’s formula for BFO (EDTA) and BFO (GL) was found to be 43 nm and 35 nm respectively. The UV-visible analysis showed that the band gap energy for BFO (EDTA) was 1.86 eV and for BFO (GL) was 2.0 eV. The structural, morphological and optical properties as well as photocatalytic activity were found to be affected by the change in chelating agents. The photocatalytic properties of prepared samples were evaluated by the degradation of methylene blue dye under visible light irradiation. The degradation efficiencies of BFO (EDTA) were found to be 71.42% and 76.66% for catalyst masses of 0.05 g and 0.1 g respectively, whereas BFO (GL) exhibited lower degradation efficiencies of 48.05% and 62.33% for the same masses respectively. These results demonstrate that EDTA significantly enhances the photocatalytic activity of BFO, likely due to improved electron transfer and increased surface reactivity, which means the use of EDTA as a chelating agent for the sol-gel synthesis of BFO makes it a more efficient photocatalyst.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Synthesis, characterization, and photocatalytic results of BiFeO₃.</p></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"344 - 355"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108605","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}