Journal of Sol-Gel Science and Technology最新文献

{"title":"pH-Responsive behavior and stability of Fmoc-phenylalanine hydrogels: a comprehensive spectroscopic analysis","authors":"Arathy Chandran,&nbsp;K. R. Athulya,&nbsp;Tirupati Rao Bantu,&nbsp;Anitha C. Kumar","doi":"10.1007/s10971-025-06815-4","DOIUrl":"10.1007/s10971-025-06815-4","url":null,"abstract":"<div><p>Fmoc-protected phenylalanine based hydrogels have been widely studied in the literature because of their diverse applications, particularly in the biomedical field, owing to their biocompatibility, self-assembly capabilities, and tunable properties. Despite extensive research on their structural and mechanical characteristics, the fluorescence properties of Fmoc-phenylalanine (Fmoc-F) hydrogels remain less discussed. Fluorescence spectroscopy offers a unique approach for monitoring real-time changes in molecular interactions and structural changes within hydrogels. Fluorescence offers several advantages, including high sensitivity and noninvasive detection, enabling a better understanding of gelation. In this study, we examined the fluorescence properties of Fmoc-phenylalanine hydrogels, with a focus on concentration dependent changes and aggregation-induced quenching (AIQ) effects. AIQ is the decrease in fluorescence emission caused by the close aggregation of fluorophores, which facilitates nonradiative decay pathways. Our findings highlight key aspects of the structural changes, stability, thermoreversibility, critical gelation concentration, and lifetime of hydrogels, providing valuable insights into their performance and potential applications. The study also revealed pH-dependent swelling and morphological characteristics. The moderate swelling rate of Fmoc-F is beneficial for controlled and sustained drug release. This makes it suitable for applications where minimal swelling is desired without the need to absorb excessive body fluids, thus enabling prolonged and stable drug delivery. Additionally, the difference in swelling with respect to small changes in pH can be used for applications such as pH-sensitive drug delivery systems.</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":"115 2","pages":"590 - 609"},"PeriodicalIF":3.2,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168108","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":"Technical feasibility of estimation and extraction of pure nano-scale silica from mixed biomass ash","authors":"Bhautik Gajera,&nbsp;Arghya Datta,&nbsp;Anil Kumar Sarma,&nbsp;Mithilesh Kumar Jha","doi":"10.1007/s10971-025-06847-w","DOIUrl":"10.1007/s10971-025-06847-w","url":null,"abstract":"<div><p>This study explores nano-scale silica extraction from mixed biomass ash through a two-step process involving alkaline digestion followed by CO₂ precipitation. Digestion conditions were optimized for maximum silica yield using Central Composite Design (CCD). Results from 20 experimental runs showed that extended reaction time and moderate NaOH concentrations (0.5 M) achieved the highest 180 g/kg yield. ANOVA indicated temperature as a significant factor (<i>p</i> &lt; 0.0001, <i>F</i> = 577.07), with an R² of 0.9756. The optimized condition resulted in 65% silica recovery with 97.5% purity, confirmed by Ion Chromatography (IC). Thermogravimetric analysis (TGA) indicated excellent thermal stability with minimal weight loss up to 800 °C. FTIR spectra showed characteristic Si–O–Si stretching at 1100 cm⁻¹ and bending at 800 cm⁻¹ and 460 cm⁻¹, confirming silica’s structural integrity. X-ray diffraction (XRD) revealed an amorphous structure, confirming successful alkali treatment and precipitation. Field emission scanning electron microscopy (FESEM) showed smooth, clustered nanoparticles (90–150 nm) suitable for high-surface-area applications. Energy-dispersive X-ray spectroscopy (EDS) confirmed the composition as silica with 48.5% silicon and 51.5% oxygen. BET surface area analysis revealed a specific surface area of 195.36 m²/g and a pore volume of 0.211 cm³/g, comparable to mesoporous materials. The pore size distribution showed an average diameter of 4.33 nm, making the silica suitable for catalytic and adsorption applications. These results demonstrate the potential of the process to make silica from biomass ash for industrial applications like catalysts and adsorbents.</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":"115 2","pages":"573 - 589"},"PeriodicalIF":3.2,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166834","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 synthesized nanoscale mixed Zn-Mg ferrite as nanoseeds for in vitro magnetic fluid hyperthermia for cancer treatment","authors":"Sandeep B. Somvanshi,&nbsp;Elmuez A. Dawi","doi":"10.1007/s10971-025-06850-1","DOIUrl":"10.1007/s10971-025-06850-1","url":null,"abstract":"<div><p>The development of advanced nanomaterials for cancer therapy has gained substantial attention for their potential in targeted treatments such as magnetic fluid hyperthermia (MFH). In this study, we synthesized mixed Zn-Mg ferrite nanoparticles (Zn_0.5Mg_0.5Fe₂O₄) using the sol-gel self-combustion method, with citric acid as the fuel and a metal nitrate-to-fuel ratio of 1:3. The nanoparticles were characterized for their structural, morphological, magnetic, and thermal properties using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDAX), vibrating sample magnetometry (VSM), and dynamic light scattering (DLS). XRD analysis confirmed a single-phase spinel structure with an average crystallite size of ~21 nm. FE-SEM revealed spherical nanoparticles with uniform distribution, while EDAX confirmed the stoichiometric composition. Magnetic measurements showed superparamagnetic behavior, with a saturation magnetization of ~29.9 emu/g, indicating potential for MFH. In vitro studies on L929 and MCF-7 cell lines demonstrated good biocompatibility and significant cytotoxicity towards cancer cells under hyperthermia conditions. These results suggest that Zn_0.5Mg_0.5Fe₂O₄ nanoparticles are promising nanoseeds for non-invasive MFH cancer therapy with minimal side effects.</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":"115 2","pages":"561 - 572"},"PeriodicalIF":3.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167424","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":"Investigation on magnetocaloric effect and critical behaviour of a La/Ba/Fe/Eu-based manganite composite","authors":"A. Ben Jazia Kharrat,&nbsp;W. Boujelben","doi":"10.1007/s10971-025-06845-y","DOIUrl":"10.1007/s10971-025-06845-y","url":null,"abstract":"<div><p>In this study, La_0.67Ba_0.33Mn_0.85Fe_0.15O₃ (sample C1) and La_0.57Eu_0.1Ba_0.33Mn_0.85Fe_0.15O₃ (sample C2) compounds were synthesized using the sol-gel method to form a composite material. The Curie temperatures of C1 and C2 were determined to be 170 K and 100 K, respectively. Both compounds exhibited relatively low magnetocaloric (MC) properties. To enhance the MC effect, a theoretical investigation was conducted on a composite composed of C1 and C2. The results indicate that the optimized composite, consisting of 80% C1 and 20% C2, exhibits a Curie temperature of 110 K and shows potential for magnetic refrigeration applications. The refined critical exponents β, γ, and δ, extracted from modified Arrott plots and the Kouvel-Fisher method, suggest that the composite’s magnetic behavior follows the mean-field model.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Temperature dependence of the relative slope (RS) of the La_0.67Ba_0.33Mn_0.85Fe_0.15O₃/La_0.57Eu_0.1Ba_0.33Mn_0.85Fe_0.15O₃ composite using the four studied models.</p></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 2","pages":"536 - 549"},"PeriodicalIF":3.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167394","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":"Synthesis gas production from landfill gas using a Pt-doped Ni-based hydrotalcite-derived catalyst","authors":"Lin Chen,&nbsp;Wang Wu,&nbsp;Qingyu Huang,&nbsp;Duchao Zhang,&nbsp;Weifeng Liu","doi":"10.1007/s10971-025-06846-x","DOIUrl":"10.1007/s10971-025-06846-x","url":null,"abstract":"<div><p>The components of landfill gas are the main atmospheric warming contributors cause environmental concerns. Dry reforming of methane (DRM) is considered to be an effective way to convert landfill gas, but a high-performance catalyst is required. A series of Pt-doped Ni-based hydrotalcite-derived catalysts were prepared by a co-precipitation method followed by supercritical deposition technology. The catalytic performance of the as-prepared catalysts was evaluated, exhibiting the following activity trend: Ni10Pt0.2-HT &gt; Ni10Pt0.1-HT &gt; Ni10Pt0.5-HT &gt; Ni10-HT. Analysis techniques including XRD, BET, H₂-TPR, TG/DSC, etc demonstrated that Pt/Ni ratio played a crucial role in the transformation of Ni species, resulting in reduced stability of Ni-Mg-Al mixed oxide and an increase in NiO_x with higher Pt ratios. Moreover, an increase in Pt ratio converted inert carbon deposition to active carbon deposition, which improved catalyst stability. The present work proposes a strategy to synthesize an active, stable CH₄-reforming catalyst with the potential for landfill gas utilization.</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":"115 2","pages":"550 - 560"},"PeriodicalIF":3.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167348","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":"Aloe vera gel-mediated sol-gel synthesis of Ce-Ni Co-doped TiO2 nanomaterials for efficient visible-light-driven binary dye degradation and antimicrobial applications","authors":"Sai Supriya Singupilla,&nbsp;Siva Rao Tirukkovalluri,&nbsp;Divya Gorli,&nbsp;Sandhya Rani Nayak,&nbsp; Raffiunnisa,&nbsp;Samuel Chufamo Jikamo,&nbsp;Nageswara Rao Kadiyala,&nbsp;Jaishree Genji","doi":"10.1007/s10971-025-06834-1","DOIUrl":"10.1007/s10971-025-06834-1","url":null,"abstract":"<div><p>This research explores the use of aloe vera gel as a capping agent to improve Ce-Ni co-doped TiO₂ nanomaterial properties for dye degradation and antimicrobial activity. Structural and optical analyses verified the anatase phase formation via PXRD (Powder X-ray Diffraction), while UV-Vis-DRS (UV-vis diffuse reflectance spectrum) indicated a narrower TiO₂ band gap (2.24 eV) upon Ce-Ni co-doping. HRTEM (High Resolution Transmission Electron Microscopy), BET (Brunauer−Emmett−Teller), and FESEM (Field emission Scanning Electron Microscopy) analysis threw light on the nanostructure of the catalyst with particle size 4.1 nm, surface area 166 m²/g, and spherical morphology with a smooth surface. EIS (Electrochemical Impedance Spectroscopy E_fb: −0.72 V) and VB-XPS (Valence band XPS E_vb: 2.17 eV) validated conduction and valence band formation, whereas PL (Photoluminescence Spectrum) analysis revealed slow electron-hole recombination. FTIR (Fourier Transform Infra-Red analysis) and XPS (X-ray photoelectron spectroscopy) confirmed dopant incorporation in the TiO₂ lattice, and XPS also specified the elemental content and oxidation states. XRF (X- ray fluorescence) spectroscopy identified the presence of all the elemental components, including the dopants. The optimized catalyst CNT2AG2 showed high photocatalytic activity, fully degrading Indigo Carmine and Malachite Green dyes within 40 and 60 min, respectively. Its higher efficiency is owed to better absorption of solar light, higher adsorption sites on the surface, and better separation of charge carriers. In addition, CNT2AG2 exhibited better antibacterial activity against <i>Streptococcus pyogenes</i> (Gram-positive MTCC-442) and <i>Enterobacter aerogenes</i> (Gram-negative MTCC-241) and antifungal activity against <i>Candida albicans</i> (MTCC-277). It was as efficient as conventional antimicrobial agents such as chloramphenicol and tinidazole. Generally, CNT2AG2 offers an economical and viable option for wastewater treatment, which has substantial potential for applications in environmental remediation.</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":"115 2","pages":"509 - 535"},"PeriodicalIF":3.2,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166093","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":"Photocatalytic degradation of organic pollutants and antibacterial properties of CuO nanoparticles: a study on methylene blue, congo red, tetracycline, ampicillin, ciprofloxacin, and azithromycin","authors":"S. Agalya,&nbsp;k. Krishna Veni,&nbsp;L. C. Nehru,&nbsp;Nandhakumar Eswaramoorthy","doi":"10.1007/s10971-025-06830-5","DOIUrl":"10.1007/s10971-025-06830-5","url":null,"abstract":"<div><p>This study focuses on the synthesis of pure metal oxide nanoparticle -CuO through the sol-gel method. CuO nanomaterial with optical, structural and morphological properties are thoroughly examined using diverse instrumental techniques to determine their suitability for specific applications. The X-ray diffraction (XRD) patterns confirmed the high crystallinity of CuO, and crystallite size was determined to be 19 nm using the Scherrer formula and the lattice strain was determined to be approximately ∼2.17 × 10⁻³ through the Williamson−Hall plot. Morphological studies of CuO nanoparticles were observed the nanoparticle shapes. Due to the substantial quantum size confinement effect, CuO nanoparticles exhibited an optical energy band gap of approximately ∼1.7 eV. This measurement, determined through Tauc’s plots of the ultraviolet−visible (UV) spectrum, contributes to the notable photocatalytic efficiency of the material. The photocatalytic activity of Methylene Blue (MB) and Congo Red (CR) dyes under both UV and Visible lamps. The MB (79%) and CR (81%) dye degradation with 120 min duration. Furthermore, the degradation potential of Sol gel synthesised nanoparticles was tested against Tetracycline (TC), Ampicillin (AMP), Ciprofloxacin (CIP), and Azithromycin (AZM) antibiotics. The findings indicated the optimal degradation efficiency over 81.3%, 70.1%, 76.3% and 71.1% of 30 mg dose of CuO NPs and 3 ppm concentration of antibiotics solution in about 120 min. Subsequently, the obtained data were employed to the reaction rate law of kinetic fitting allowing for the determination of the correlation coefficient (R²) to assess the particle’s performance and exhibiting remarkable recycling capabilities in the degradation dyes, proved to be highly favourable and efficient catalysts. Antibacterial activity was assessed using the agar well diffusion method -<i>Bacteroides fragilis</i> and <i>Bacillus cereus</i>. Among the tested pathogens, B. cereus exhibited higher susceptibility, with a zone of inhibition measuring 10 mm, in response to the synthesized CuO NPs.</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":"115 3","pages":"1404 - 1427"},"PeriodicalIF":3.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927047","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":"Facile modified sol-gel process to prepare highly photocatalytic active ZrO2 nanoparticles: microstructure and optical properties","authors":"Anis Fkiri,&nbsp;Mohamed Ali Saidani,&nbsp;Wael Chouk,&nbsp;Soufiane Touil,&nbsp;Tariq Altalhi,&nbsp;Amine Mezni","doi":"10.1007/s10971-025-06839-w","DOIUrl":"10.1007/s10971-025-06839-w","url":null,"abstract":"<div><p>In this research work, a new synthesis method was introduced to prepare ZrO₂ nanoparticles (NPs) with controllable size and shape. The zirconium dioxide NPs were obtained using a facile one-pot solvothermal chemical approach. The facility of this protocol is the use of dimethyl sulfoxide (DMSO) as both solvent and stabilizing agents, which means that no other regents are needed to produce ZrO₂ nanoparticles. The importance of this procedure can be summarized in two important points: the low cost of this approach (no other reagents such as base, ligands, oxidizer agent, etc. are needed) and the purity/high activity of the formed NPs (the use of many reagents can produce a lot of by-products that can be adsorbed at the NPs surface which prevent its activity). The morphology and the microstructure of the obtained ZrO₂ NPs were investigated using different instruments. The synthesized nanoparticles exhibited high crystallinity with an average size of ~13 nm. On the other hand, the prepared ZrO₂ NPs exhibited an interesting optical response in the UV region with high energy gap (~5 eV) which is then exploited for the photodegradation activity. The photodegradation efficiency of zirconium dioxide (ZrO₂) nanoparticles against Methyl Orange (MO), and Diuron molecules were assessed under UV light irradiation. The photocatalytic performance achieved 72% within 60 min. The high activity of ZrO₂ photocatalyst can be attributed to the simplicity of the chemical procedure generating high pure and active surface which is considered as the principal important parameter in heterogeneous photocatalysis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 2","pages":"487 - 497"},"PeriodicalIF":3.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165702","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":"Novel sol-gel synthesis of bismuth molybdate decorated with Au nanoparticles for solar CO2 photoreduction","authors":"Diego Santiago,&nbsp;Arturo Velasco,&nbsp;Claudia Elena. Pérez,&nbsp;Rufino Nava,&nbsp;Francisco Javier De Moure,&nbsp;José Santos,&nbsp;Sandra Andrea Mayén","doi":"10.1007/s10971-025-06791-9","DOIUrl":"10.1007/s10971-025-06791-9","url":null,"abstract":"<div><p>Bismuth molybdate photocatalyst powders were synthesized via a novel sol-gel process using citric acid and PEG 200. The powders were sintered for 2 h at 450 °C and 500 °C, then decorated with different concentrations of gold nanoparticles (Au NPs) to enhance the photoreduction of CO₂ to methanol under sunlight. Au NPs were incorporated onto the powder surface using the photodeposition method. X-ray diffraction, Raman spectroscopy, UV-Vis diffuse reflectance spectroscopy, and scanning electron microscopy were performed to characterize the textural, structural, and compositional properties of the materials. The photocatalytic activity was assessed through methylene blue degradation and CO₂ photoreduction, using sunlight as the energy source. The pristine material exhibited a band gap of approximately 3.0 eV and contained a mixture of two phases: Bi₂MoO₆ and Bi₆Mo₂O₁₅. After decoration with Au NPs, the band gap narrowed to 2.9 eV, and a surface plasmonic effect was observed above 520 nm. The sample exhibiting the best performance in dye photodegradation and CO₂ photoreduction was sintered at 500 °C with 0.05 mM of Au NPs, achieving 82.89% methylene blue degradation after 3 h, and a peak methanol production of 15.87 µmol•g⁻¹ after 4 h of reaction under sunlight. The methanol yield was comparable to that obtained with materials synthesized using other methods.</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":"115 2","pages":"498 - 508"},"PeriodicalIF":3.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165703","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":"Periodic mesoporous organosilica with Serine-Tryptophan dipeptide framework by encapsulating curcumin to enhance ultraviolet shielding","authors":"Hengchang He,&nbsp;Huapei Peng,&nbsp;Fangyuan Liu,&nbsp;Xiuwen Zhu,&nbsp;Chi Qu,&nbsp;Cheng Guo,&nbsp;Jianqiang Wang","doi":"10.1007/s10971-025-06824-3","DOIUrl":"10.1007/s10971-025-06824-3","url":null,"abstract":"<div><p>Plant compound curcumin with strong absorption capabilities in UV range has gained significant attention for its potential application as a natural ultraviolet shielding agent. However, certain challenges such as limited water solubility and photostability sill restrict its usage. Nanoencapsulation as one of the advanced delivery systems is explored to overcome these limitations. In this study, we design a periodic mesoporous organosilica (PMO) material with Serine-Tryptophan dipeptide framework via sol-gel synthesis method to encapsulate curcumin as potential sunscreen. The dipeptide PMO material were prepared by co-condensation of self-designed Serine-Tryptophan dipeptide bilateral organic silane precursor and tetraethyl orthosilicate in the presence of template CTAB under alkali condition. The PMO material before and after encapsulating curcumin were characterized by XRD, FTIR and nitrogen adsorption-desorption analysis, which confirmed the presence and maintenance of the mesoporous structure within the encapsulation system. Adsorption kinetics and isotherms during curcumin encapsulation were well described by the pseudo-second-order model and Freundlich isotherm, respectively, indicating chemisorption-dominated multimolecular layer adsorption process. Besides, the material exhibited comprehensive broad-spectrum photoprotection against UV light with dominant protection in UVA region. After encapsulating curcumin, the sun protection factor (SPF) was significantly enhanced, demonstrating the excellent photo-protective nature of dipeptide PMO material. The critical wavelength (λc) for the material exceeded 370 nm. In a simulated sweat release experiment to evaluate photostability, only 2.6% of curcumin was released after 24 hours, demonstrating exceptional stability. Consequently, our findings suggest that dipeptide can serve as framework building constituents for the development of novel PMO material. Furthermore, the PMO material encapsulating curcumin could provide stable protection, demonstrating its potential as effective UV shielding filter.</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":"115 2","pages":"471 - 486"},"PeriodicalIF":3.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164312","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}