Journal of Sol-Gel Science and Technology最新文献

{"title":"Sandwich-like GO@Ni-MOF@NiAl-LDHs via dissolution–reassembly for high-performance supercapacitors","authors":"Elham Mazaheri,&nbsp;Ahmad Gholizadeh","doi":"10.1007/s10971-026-07157-5","DOIUrl":"10.1007/s10971-026-07157-5","url":null,"abstract":"<div><p>Metal–organic frameworks are regarded as promising candidates for advanced supercapacitor applications because of their extremely large surface areas and highly porous architectures. However, their practical use is often limited by sluggish charge transport and insufficient stability under alkaline conditions. In this work, a simple dissolution–reconstruction approach is introduced to fabricate a sandwich-structured GO@Ni-MOF@NiAl-LDHs composite, effectively overcoming these limitations. In this system, NiAl layered double hydroxides act as reservoirs that capture and reorganize nickel ions released from the Ni-MOF during processing. The incorporation of GO enhances electrical conductivity and exposes additional electrochemically active sites. Furthermore, the layered sandwich configuration facilitates faster electron transport and lowers electrolyte diffusion resistance, thereby improving overall electrochemical performance. At the same time, the layered, sandwich-like configuration shortens electron-migration lengths and decreases ion-diffusion resistance. As a result, the electrode exhibits markedly enhanced electrochemical behavior, which originates from the improved intrinsic activity following the structural evolution from GO@Ni-MOF@AlOOH to GO@Ni-MOF@NiAl-LDHs during cycling. The optimized material achieves a high specific capacitance of 2382 F·g⁻¹ at 1 A g⁻¹ in a three-electrode system. When paired with GO, the GO@Ni-MOF@NiAl-LDHs based device reaches an energy density of 494 Wh kg⁻¹; at 654 W kg⁻¹. Overall, this dissolution-reconstruction strategy opens a promising avenue for developing advanced materials for energy-storage technologies.</p><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 2","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07157-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147714822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles calculations to investigate pressure-driven phase transition and elastic properties of TlGaSe2","authors":"V. B. Aliyeva,&nbsp;Z. A. Jahangirli,&nbsp;N. A. Ismayilova,&nbsp;S. H. Jabarov,&nbsp;MirHasan Yu. Seyidov,&nbsp;T. G. Mammadov","doi":"10.1007/s10971-026-07153-9","DOIUrl":"10.1007/s10971-026-07153-9","url":null,"abstract":"<div><p>The optimized crystal structure, Raman spectra, and elastic properties of layered TlGaSe₂ crystal are determined using the first-principles method at pressures between 0 and 12 GPa. The results of the calculations indicate that the lattice constants change sharply at around 0.9 GPa and the c-axis is more compressible than the a- and b-axes. We observe the most striking changes in interatomic Tl–Ga distances. Our investigation results show that TlGaSe₂ undergoes a pressure-induced isostructural phase transition. We have calculated how elastic constants and different elastic properties, like bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio, and Raman active modes, change with pressure. By clarifying the pressure-dependent behavior of TlGaSe₂, this work contributes to the broader understanding of layered semiconductors under compression. Beyond clarifying the pressure-induced phase transition mechanism, our results provide theoretical support for the use of TlGaSe₂ under high pressure in radiation detection, photoacoustic devices, and broadband photodetectors, as suggested in earlier experimental studies.</p><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07153-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plant-mediated green synthesis of gold nanoparticles using pomegranate peel (Punica granatum L) extract: free radical scavenging, drug loading and photo-catalytic activity","authors":"Saba Niaz,&nbsp;Sharjeel Khan,&nbsp;Hera N. Khan,&nbsp;Irfan Ullah Khan,&nbsp;Anjum N. Sabri,&nbsp;Shahzad Naseem,&nbsp;Saira Riaz","doi":"10.1007/s10971-025-07016-9","DOIUrl":"10.1007/s10971-025-07016-9","url":null,"abstract":"<div><p>Researchers are becoming more interested in the biological synthesis of gold nanoparticles (Au-NPs) due to its wide range of biomedical uses. Extract of pomegranate peel [<i>Punica granatum L (P. granatum)</i>] is used to green synthesize gold (Au) nanoparticles (NPs) with the variation in content. The ultraviolet (UV) absorption peak of gold nanoparticles is observed at ~512–515 nm. Antioxidant analysis is used to assess the synthesized gold nanoparticles’ (Au-NPs) capacity to scavenge free radicals. The gold nanoparticles (Au-NPs) demonstrate antibacterial effects when applied to harmful microorganisms. Drug loading studies demonstrate that curcumin, a naturally occurring medicine, exhibits the highest loading at 120 min. Green synthesized nanoparticles are used to test the improved photo-catalytic activity against the methylene blue, methyl orange and methyl red dye. It has been noted that the longer a dye is exposed to sunshine, the more dye degrades. Based on all these factors, the green synthesized gold nanoparticles (Au-NPs) can be beneficial for various biological fields.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-025-07016-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boron-doped graphene anchored with Bi2S3-decorated carbon photocatalyst for removal of pharmaceutical pollutants from wastewater","authors":"Manal Mohammed Alkhamisi,&nbsp;Reim Abdullah Almotiri,&nbsp;Seung Goo Lee,&nbsp;Muhammad Farooq Warsi","doi":"10.1007/s10971-026-07119-x","DOIUrl":"10.1007/s10971-026-07119-x","url":null,"abstract":"<div><p>In the current study, an in situ hydrothermal synthesis was performed to synthesize composites of bismuth sulfide (Bi₂S₃) and carbon (C). Additionally, a composite of Bi₂S₃/C with boron-doped graphene was prepared through ultrasonication. Photodegradation of commercially available drugs (ciprofloxacin and paracetamol) was used to explore the photodegradation activity of the photocatalysts (Bi₂S₃, Bi₂S₃/C, and Bi₂S₃/C/B-doped graphene nanocomposite). XRD data indicated that the Bi₂S₃ crystallized in the orthorhombic crystal system with an average crystallite size of 12 to 13 nm. PL analysis revealed the lowest peak intensity for the Bi₂S₃/C/B-doped graphene nanocomposite, consistent with a reduced rate of recombination and an increase in the life of electron-hole pairs. An optical study showed a decrease in the bandgap of Bi₂S₃ after composite formation, which effectively improved the photodegradation rate. Scavenging results revealed that the hydroxyl radicals are the most active species during the photoreaction mechanism. Overall, the Bi₂S₃/C/B-doped graphene nanocomposite possessed the lowest PL intensity and a large surface area, which improved its light absorption and charge separation capability. These features make it appropriate for photocatalysis and also highlight its potential in water purification in the drug industry.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07119-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnesium-substituted copper ferrites for sustainable wastewater treatment via visible-light photocatalysis","authors":"Julia Mazurenko,&nbsp;Larysa Kaykan,&nbsp;Antoni Zywczak,&nbsp;Mateusz M. Marzec,&nbsp;Liliia Turovska,&nbsp;Katarina Hreus","doi":"10.1007/s10971-026-07151-x","DOIUrl":"10.1007/s10971-026-07151-x","url":null,"abstract":"<div><p>This work presents a comprehensive investigation of Mg_xCu_1-xFe₂O₄ (0.0 ≤ x ≤ 1.0) spinel ferrites synthesized via the sol–gel autocombustion method, with a focus on tuning their physicochemical properties for enhanced photocatalytic degradation of organic dyes. Structural analysis confirmed the formation of cubic spinels with nanometric crystallite sizes (23–28 nm) and high thermal stability. Surface area and porosity, evaluated by BET analysis, increased with Mg content, reaching 33.0 m²/g at x = 0.8, while X-ray photoelectron spectroscopy revealed systematic changes in surface redox states and oxygen species, notably the decline of Cu²⁺ and the evolution of defect-related oxygen. Optical studies showed band gap widening from 1.94 to 2.42 eV with increasing Mg substitution, reflecting changes in Cu–O and Fe–O hybridization that modulate visible-light absorption and charge carrier dynamics. Photocatalytic tests under visible light and in the presence of H₂O₂ demonstrated composition-dependent degradation efficiencies toward methylene blue (MB), rhodamine B (RhB), and malachite green (MG). Cu-rich compositions (x = 0.2–0.4) achieved the highest photocatalytic activity for MB and RhB, while Mg-rich ferrites exhibited superior performance for MG, including efficient degradation under dark conditions via a heterogeneous Fenton-like mechanism. Kinetic modeling confirmed pseudo-first-order behavior, and quantum yield analysis highlighted the importance of redox-active Cu²⁺/Fe²⁺ species and surface oxygen states in maximizing photon-to-reaction efficiency. All compositions maintained excellent structural integrity and catalytic efficiency over five reuse cycles, underscoring their stability and potential as recyclable photocatalysts for sustainable wastewater treatment.</p><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07151-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sol–gel synthesis and characterization of nickel-doped spinel ferrites for photodegradation of norfloxacin","authors":"Cumali Celik,&nbsp;Malik Salman Tariq,&nbsp;Rana Zaki Abdul Bari,&nbsp;Anwar Ul Haq,&nbsp;Roopashree R,&nbsp;Debasish Shit,&nbsp;Subhashree Ray,&nbsp;Tawaf Ali Shah,&nbsp;Ahmad Mohammad Salamat Ullah,&nbsp;Muhammad Yasar","doi":"10.1007/s10971-025-07033-8","DOIUrl":"10.1007/s10971-025-07033-8","url":null,"abstract":"<div><p>This study focused on the synthesis and characterization of nickel-doped spinel ferrites (Ni_XMg_1−XAl_0.3Fe_1.7O₄ (<i>X</i> = 0, 0.5)) via the sol–gel method for the photocatalytic degradation of norfloxacin. Incorporating nickel significantly improved the material properties, decreasing the crystallite size from 33.43 nm to 28.28 nm (a 15.4% reduction) and increasing the specific surface area from 5.57 m²/g to 8.67 m²/g (a 55.8% increase). The optical bandgap narrows by 5.3%, from 2.85 eV to 2.70 eV, enhancing visible-light absorption. These tailored properties improve the charge-carrier separation efficiency and increase the generation of reactive oxygen species. Under visible light and optimized conditions (pH 7, 30 °C, 10 mg catalyst, 10 ppm norfloxacin), the nickel-doped ferrite achieved 98.43% degradation efficiency of norfloxacin within 50 min, significantly outperforming the undoped sample (60.54% removal efficiency). Mechanistic studies identified hydroxyl radicals (HO*) as the primary oxidative species, with degradation following pseudo-first-order kinetics (<i>R</i>² = 0.9861). The magnetic properties of the catalyst allowed for easy recovery (&gt;95% recovery rate), thereby addressing the challenges of practical implementation. This ternary-substituted ferrite synthesis method optimizes visible-light absorption, structural stability, and surface reactivity, offering a promising approach for efficient norfloxacin degradation.</p><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737530","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":"Plant mediated synthesis of zirconium oxide nanoparticles using Jasminum officinale and screening its antimicrobial activity - An efficient Photocatalyst for decomposition of various dyes","authors":"Nazeer Abbas,&nbsp;Tanzeela Batool,&nbsp;Daoud Ali,&nbsp;Tehmina Anjum,&nbsp;Shamaila Shahzadi,&nbsp;Anjum N. Sabri,&nbsp;M. Akram Raza,&nbsp;Shahzad Naseem,&nbsp;Saira Riaz","doi":"10.1007/s10971-026-07111-5","DOIUrl":"10.1007/s10971-026-07111-5","url":null,"abstract":"<div><p>Boosting the shelf life of fruits and protection of crops from pathogenic microorganisms using nanoparticles-based agrochemicals have received consideration across the globe. This paper explores the green synthesis of zirconia nanoparticles (NPs) prepared from different plant extracts, including <i>Vitis vinifera</i> (<i>VV</i>), <i>Aloe barbadensis miller</i> (<i>AB</i>) and <i>Jasminum officinale</i> (<i>JO</i>). The monoclinic phase of zirconia is observed, with smaller crystallite size, when samples are synthesized using <i>JO</i>. The scavenging activity of zirconia NPs prepared using <i>JO</i> was found to be reasonably high. The results of photocatalytic studies showed that the NPs exhibited ~88% and ~90% dye degradation for methylene blue (MB) and methyl orange (MO), respectively. The effect of NPs produced using the optimized synthesis route was investigated for tomato fungal pathogen i.e. <i>Fusarium oxysporum</i> under in vitro and pot experiments. The maximum inhibited fungal growth against <i>F. oxysporum</i> was observed for <i>JO</i>-ZrO₂ NPs at a concentration of 20 µg/mL. The results suggest that green synthesized zirconia NPs can be used to keep tomatoes fresh for several days under ambient conditions.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07111-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surfactant-tuned Bi₂WO₆ nanostructures for degradation of organic pollutants","authors":"S. Keerthana,&nbsp;C. Mahendran","doi":"10.1007/s10971-026-07161-9","DOIUrl":"10.1007/s10971-026-07161-9","url":null,"abstract":"<div><p>Hierarchical Bi₂WO₆ nanostructures were successfully synthesized via a surfactant-assisted hydrothermal method employing cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulphate (SDS), polyethylene glycol (PEG), and polyvinylpyrrolidone (PVP) to modulate crystal growth, morphology, and functional efficiency. X-ray diffraction (XRD) verified the formation of pure orthorhombic Bi₂WO₆ with crystallite sizes ranging from 18 to 28 nm, depending on the surfactant used. Surface morphology analysis via scanning electron microscopy (SEM) revealed distinct structural variations, with PVP-assisted Bi₂WO₆ displaying a uniform flower-like architecture. The optimised hydrothermal conditions, particularly the use of polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide (CTAB), played a crucial role in achieving the flower-like Bi₂WO₆ morphology. Elemental composition was verified using energy dispersive X-ray analysis (EDAX), while Raman spectroscopy confirmed the stability of the WO₆ octahedral framework. X-ray photoelectron spectroscopy (XPS) identified the oxidation states of Bi³⁺, W⁶⁺, and O²⁻, further validating the chemical structure. Optical characterisation by ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy revealed visible-light responsiveness, with bandgap energies ranging from 2.60 to 2.78 eV. Among all variants, PVP-mediated Bi₂WO₆ demonstrated exceptional photocatalytic activity, achieving ~94% degradation of Rhodamine B (RhB) under visible light in 50 minutes. Furthermore, it demonstrated significant antibacterial activity, making it a promising candidate for environmental remediation. The enhanced performance is attributed to improved morphology, efficient charge separation, and a narrowed bandgap.</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":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07161-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MgO and MgO/char nanocomposites as efficient catalysts for the removal of thiophene and malachite green from aqueous systems","authors":"Abdelmadjid Guerram,&nbsp;Bilal Khaled,&nbsp;Salah Eddine Laouini,&nbsp;Abderrahmane Bouafia,&nbsp;Ilham Ben Amor,&nbsp;Djamel Barani,&nbsp;Imen Zaghbib,&nbsp;Mahmood M. S. Abdullah,&nbsp;Hamad A. Al-Lohedan,&nbsp;Johar Amin Ahmed Abdullah","doi":"10.1007/s10971-026-07145-9","DOIUrl":"10.1007/s10971-026-07145-9","url":null,"abstract":"<div><p>MgO nanoparticles were synthesized by precipitation-calcination: 0.1 M Mg(NO₃)₂·6H₂O was precipitated with 0.5 M NaOH to pH 10–11, aged for 2 h, washed, dried at 100 °C, and calcined at 450 °C for 3 h. The MgO/char nanocomposite was fabricated by ultrasonically dispersing biomass-derived activated carbon (0.5 g in 100 mL water for 30 min), adding pre-synthesized MgO nanoparticles, stirring, aging for 2 h, washing, and drying at 100 °C. Analytical-grade chemicals and deionized water were used. Materials were characterized by UV–Vis (band-edge absorption at ~307 nm), FTIR, XRD (cubic periclase MgO; crystallite sizes 9.71 ± 1.39 nm for pure MgO and 19.95 ± 1.60 nm for composite), XPS (O 1 s: 530.10 eV in MgO vs. 531.58 eV in composite; Mg 2p: 51.08 eV vs. 52.30 eV), SEM (reduced aggregation in composite), and EDX (confirmed Mg, O, and C presence). Photocatalytic tests under simulated sunlight (0.05 g catalyst in 100 mL pollutant solution) showed thiophene degradation of 99.24% (MgO) and 100% (composite) in 90 min. Malachite green degradation reached 99.91% (MgO) but only 88.92% (composite) in 140 min, reflecting adsorption dominance in the composite. Experiments were triplicated with mean ± standard deviation reported.</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":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-026-07145-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147643130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic degradation of organic pollutants using cu-doped spinel ferrites synthesized via sol-gel auto-combustion: a study of structural, optical, and catalytic properties","authors":"Cumali Celik,&nbsp;Muhammad Yasar,&nbsp;Khalid J. Alzahrani,&nbsp;Anorgul Ashirova,&nbsp;Yashwantsinh Jadeja,&nbsp;R. Roopashree,&nbsp;Subhashree Ray,&nbsp;Krishan Kumar sah,&nbsp;Sultonmakhmud Polvanov,&nbsp;Khalaf F. Alsharif","doi":"10.1007/s10971-025-07031-w","DOIUrl":"10.1007/s10971-025-07031-w","url":null,"abstract":"<div><p>CR dye, a toxic industrial pollutant discharged at 280,000 tons annually, poses severe environmental risks. In this study, we developed Cu-doped Sr₁₋₂Al₀.₄Fe₁.₆O₄ (x = 0.0, 0.4) spinel ferrites via sol-gel auto-combustion method as efficient photocatalysts for dye degradation. Cu-doping induced significant structural modifications: the crystallite size decreased from 28.011 to 20.438 nm, the lattice parameter contracted from 8.4679 to 8.3801 Å, and the BET surface area increased 3.7-fold (from 6.63 to 24.45 m²/g). The optical bandgap narrows from 2.6 to 2.3 eV, enhancing visible-light absorption. Under optimised conditions (pH 7, 30 °C, 10 mg catalyst, 10 ppm dye, 100 W visible light), Cu₀.₄Sr₀.₄Mn₀.₂Al₀.₄Fe₁.₆O₄ achieved 99.70% CR degradation in 100 min, compared to 52.45% for the undoped catalyst. Performance metrics showed a quantum yield of 2.77 × 10⁻⁶ molecules/photon and space-time yield of 1.39 × 10⁻⁷ molecules/photon. Hydroxyl radicals were identified as the primary reactive species in scavenger studies. The catalyst demonstrated versatility by degrading multiple dyes: Rhodamine B (84.23%), Alizarin Yellow (71.83%), and Methylene Blue (53.10%). The addition of H₂O₂ (6 mM) accelerated the complete degradation to 65 min. The catalyst maintained an efficiency of 91.34% after five cycles, confirming its stability. This Cu-doped spinel ferrite system presents a sustainable solution for the treatment of industrial 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":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10971-025-07031-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147643094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}