Nano-Structures & Nano-Objects最新文献

{"title":"Controlled hydrothermal decoration of α-MnO2 on TiO2 nanotubes for enhanced visible-light degradation of diazinon","authors":"Tanti Haryati ,&nbsp;Herlina Nur Hanifah ,&nbsp;Muhammad Reza ,&nbsp;Agus Wedi Pratama ,&nbsp;Holilah ,&nbsp;Novita Andarini ,&nbsp;Suwardiyanto","doi":"10.1016/j.nanoso.2026.101673","DOIUrl":"10.1016/j.nanoso.2026.101673","url":null,"abstract":"<div><div>This study presents the controlled hydrothermal decoration of α-MnO₂ onto TiO₂ nanotubes (TNTs) and evaluates the resulting nanocomposites for visible-light photodegradation of diazinon. Nanocomposites containing 0–25 wt% MnO₂ were successfully synthesized as a well-defined two-phase system comprising anatase TiO₂ and tetragonal α-MnO₂, as confirmed by X-ray diffraction. SEM/TEM analyses verified that the TiO₂ retains its tubular morphology, while α-MnO₂ (∼48 nm) is uniformly anchored on the nanotube surfaces (outer diameter ∼8 nm). The incorporation of MnO₂ significantly modified the electronic structure of TNTs, narrowing the band gap from 3.20 eV to 1.56–2.16 eV and enhancing visible-light absorption. A strong structure–property relationship was established, with the 10 wt% MnO₂/TNTs sample exhibiting the highest specific surface area (176.68 m²/g) and the most efficient photocatalytic activity, achieving 78.61% diazinon removal, significantly outperforming pristine TNTs and physical mixture controls under identical conditions. The performance enhancement is associated with improved charge separation and reinforced redox capability arising from interfacial interactions between α-MnO₂ and the TNT framework. Based on band-edge alignment and photodegradation behavior, a proposed direct Z-scheme charge-transfer pathway is suggested to account for the enhanced visible-light activity of the optimized nanocomposite. To the best of our knowledge, this work represents the first demonstration of α-MnO₂–modified TiO₂ nanotubes for the visible-light-driven degradation of diazinon at low concentrations.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101673"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ag-modified sodium-containing anatase-bronze TiO2: Structural and interfacial electronic characteristics","authors":"Saim A. Khatri ,&nbsp;Sunil H. Chaki ,&nbsp;Sagnik Mukherjee ,&nbsp;Abhijit Ray ,&nbsp;Anjali B. Thakkar ,&nbsp;Parth Thakor ,&nbsp;Sandip V. Bhatt","doi":"10.1016/j.nanoso.2026.101660","DOIUrl":"10.1016/j.nanoso.2026.101660","url":null,"abstract":"<div><div>Mixed-phase anatase-bronze TiO₂ nanostructures containing sodium (Na) are synthesized via alkaline co-precipitation, followed by surface modification with silver (Ag) nanoparticles through chemical reduction. X-ray diffraction confirmed the coexistence of tetragonal anatase and monoclinic TiO₂(Bronze) phases without detectable secondary impurities. Phase composition analysis indicated approximately 59% anatase and 41% bronze content. Raman spectroscopy further supported the biphasic structure and revealed vibrational features consistent with monoclinic lattice distortion. X-ray photoelectron spectroscopy confirmed the presence of Na species in the material and indicated electronic interaction between Ag species and the TiO₂ surface through binding energy shifts in the Ti 2p and Ag 3d regions. Williamson–Hall analysis revealed compressive lattice strain associated with phase coexistence. Nitrogen adsorption measurements showed low specific surface areas (27–33 m² g⁻¹) and Type III isotherm behavior, suggesting weak adsorbate-surface interaction. Ag surface modification resulted in a measurable redshift in the optical absorption edge, with apparent band gap values decreasing from 2.97 eV to 2.76 eV. The observed optical modulation is attributed to interfacial interaction and plasmonic absorption from dispersed Ag nanoparticles. A photodegradation study on methylene blue using visible-light is used as an indicator reaction, while the pseudo first-order rate constant is raised from 0.1136 h⁻¹ to 0.2456 h⁻¹ through Ag surface modification. Adsorbed CO₂ analysis indicates a higher amount of adsorption of CO₂ on MP–TiO₂ than on Ag–MP–TiO₂ for the same surface area and pore volume values, confirming partial blockage of Ti-O adsorption sites by Ag. A preliminary evaluation of cytotoxicity on A549 cells has found that IC₅₀ is lower in the case of Ag–MP–TiO₂ (39.48 ± 0.35 µg mL⁻¹) than in the case of MP–TiO₂ (48.71 ± 0.42 µg mL⁻¹).</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101660"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bridging the gap in nanomedicine: Translational challenges and innovations in stimuli-responsive nanocarriers","authors":"Sandip Bhoi ,&nbsp;Gautam Ramraje ,&nbsp;Nitin Ahire ,&nbsp;Vikas Patil","doi":"10.1016/j.nanoso.2026.101652","DOIUrl":"10.1016/j.nanoso.2026.101652","url":null,"abstract":"<div><div>Stimuli-responsive nanocarriers are innovative platforms for targeted drug delivery. This comprehensive review synthesizes the recent advances from 2020 to 2025. Endogenous triggers, including acidic tumor pH, elevated intracellular glutathione levels, overexpressed enzymes, and hypoxia, facilitate the precise release of drugs into the disease microenvironment. In contrast, exogenous stimuli, such as near-infrared (NIR) light, magnetic fields, ultrasound, and mild hyperthermia, provide non-invasive external control. Published in vivo studies (2020–2025) have reported that multi-stimuli-responsive systems achieve enhanced tumor accumulation, deep tissue penetration, and synergistic effects when combined with immunotherapy or photothermal ablation. Despite substantial preclinical evidence, clinical translation remains limited, with only a few candidates (<em>ThermoDox®, Doxil®, Onivyde®, NanoTherm®</em>) in trials or approved, primarily due to the \"valley of death,\" a convergence of challenges including the protein corona and immunogenicity at the bio-nano interface, scalability constraints, manufacturing reproducibility, and complex regulatory pathways for combination products. Emerging strategies to overcome these barriers include biomimetic coatings, artificial intelligence (AI)-driven material design, and patient-stratified diagnostics for the selection of responsive systems. A pragmatic translational roadmap requires standardized characterization protocols, large-animal efficacy studies, stability-release balance optimization, and early regulatory engagement to harmonize quality standards. Future nanomedicines are projected to integrate feedback-controlled release, personalized biomarker-guided selection, and closed-loop systems, positioning stimuli-responsive nanocarriers as cornerstone technologies for precision medicine and improved therapeutic outcomes across oncology, inflammatory diseases, and infection management.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101652"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aspergillus flavus mediated green synthesis of niobium (V) oxide nanoparticles: Structural and surface characterization","authors":"Angélica Ribeiro Soares ,&nbsp;Gabriel de Oliveira Rodrigues ,&nbsp;Giovani Pavoski ,&nbsp;Luciana Gimenes Jandelli ,&nbsp;Denise Crocce Romano Espinosa ,&nbsp;Jorge Alberto Soares Tenório ,&nbsp;Marcela dos Passos Galluzzi Baltazar","doi":"10.1016/j.nanoso.2026.101682","DOIUrl":"10.1016/j.nanoso.2026.101682","url":null,"abstract":"<div><div>The green synthesis method for producing nanoparticles has gained increasing global interest because of its environmentally friendly approach, which avoids the use of harmful chemicals. Fungi are especially useful in this process because they produce metabolic compounds and proteins that act as natural reducing and stabilizing agents. While niobium nanoparticles are mainly created through chemical synthesis for various high-tech uses, recent studies have shifted focus toward biogenic methods. This research aimed to produce niobium oxide nanoparticles using the fungus <em>Aspergillus flavus</em>. The nanoparticles were extensively analyzed using techniques such as ATR-FTIR spectroscopy, X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX), particle size analysis, zeta potential measurement, and nitrogen physisorption with BET methods. The study also examined the effects of calcination on the nanoparticle samples, followed by further analysis with XRD. Results revealed organic compounds on the nanoparticle surfaces, suggesting their role as possible capping agents. This was further confirmed by SEM-EDX analysis. To the best of current knowledge, this is the first report documenting the biosynthesis of niobium nanoparticles using fungal organisms. This biologically driven method offers a low-impact way to produce nanomaterials, with potential applications in catalysis, biomedical technologies, and supporting sustainable engineering solutions and resource-efficient processes.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101682"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Targeting dysregulated signaling cascades in breast cancer: Advances in nanocarrier-based formulation strategies for precision therapy","authors":"Suchita Waghmare ,&nbsp;Rohini Palekar ,&nbsp;Pratiksha Bramhe ,&nbsp;Nilesh Rarokar ,&nbsp;Pramod Khedekar","doi":"10.1016/j.nanoso.2026.101711","DOIUrl":"10.1016/j.nanoso.2026.101711","url":null,"abstract":"<div><div>Despite advances in therapy, breast cancer remains one of the leading causes of death among women, generally caused by dysregulation of critical signaling pathways, including PI3K/Akt/mTOR, MAPK/ERK, JAK/STAT, NF-κB, and Wnt/β-catenin. Targeted therapies have improved outcomes but suffer from their limited efficacy due to drug resistance, systemic toxicity, and poor pharmacokinetics. Nanocarrier technologies, including liposomes, polymeric nanoparticles, dendrimers, lipid-based systems, and bioinspired hybrids, enable the combination of molecular pathway targeting with controlled and targeted drug delivery. This review underscores how nanocarrier-based drugs control oncogenic cascades in breast cancer and how they can surpass therapeutic resistance and enhance precision therapy. There is evidence that nanocarriers increase pathway inhibitor solubility and stability and accumulate them in the tumor, leading to prolonged inhibition of proliferative signaling while minimizing toxicity. Dual or multidrug systems co-targeting PI3K/mTOR–NF-κB or STAT3–β-catenin exhibit synergistic antitumor activity, while stimuli-responsive, ligand-addressed, and AI-optimized nanocarriers enable targeted release and adaptive functionality. Bioinspired platforms add further biocompatibility and immune evasion. Translational improvements are substantiated by preclinical pharmacodynamics experiments and early clinical trials, but large-scale manufacture and regulatory standardization are challenges. Pathway-directed nanomedicine is a step towards precision oncology, integrating molecular pharmacology with intelligent formulation design to provide stable, patient-customized regulation of cancer signaling networks and improved clinical efficacy.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101711"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148183984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystallographic impact on hydrolysis catalyst (pH) of Sol-gel derived polymorphs TiO2 nanocrystals","authors":"Md. Ashikur Rahaman ,&nbsp;Md. Tarikul Islam ,&nbsp;Gazi Md. Arifuzzaman Khan ,&nbsp;Rahima Tanbin Tama ,&nbsp;Shanawaz Ahmed ,&nbsp;Aliza Rahman ,&nbsp;Mist Toma Khatun ,&nbsp;Md. Ashraful Alam","doi":"10.1016/j.nanoso.2026.101701","DOIUrl":"10.1016/j.nanoso.2026.101701","url":null,"abstract":"<div><div>High-crystallinity anatase nanoparticles (NPs) were synthesized using a scalable sol-gel route with tetraisopropyl orthotitanate (TIOT) as the precursor and isopropyl alcohol as the peptizing agent under controlled pH conditions of 4.0, 9.0 and 11.0. The X-ray diffraction analysis supported by Rietveld refinement revealed that the crystallographic properties of the NPs were strongly dependent on the synthesis pH. The sample prepared at pH 9.0 exhibited a single anatase phase with 100 % purity, an average crystallite size of 8.227 nm, a crystallinity index of 1.381 and the highest theoretically estimated specific surface area of 188.988 m²/g based on XRD-derived crystallite size. The optical band gap energies, estimated using Kubelka–Munk-based Tauc plots assuming indirect allowed transitions, were calculated to be 2.94 eV (pH 4.0), 2.73 eV (pH 9.0) and 3.12 eV (pH 11.0). TEM analysis of the optimized pH 9.0 sample confirmed well-dispersed nanoparticles with an average particle size of approximately 9.60 nm, while HR-TEM and SAED verified the anatase lattice structure. TEM-EDS analysis confirmed elemental purity with ∼62.0 % Ti and ∼38.0 % O. The pH 9.0 anatase demonstrated high photocatalytic efficiency, achieving 91.05 % degradation of crystal violet dye under halogen light irradiation. A comprehensive correlation between synthesis pH, crystallographic strain, lattice properties and photocatalytic activity was established through combined Rietveld refinement and TEM. The study establishes a systematic correlation between synthesis pH and provides deeper insight into the structure-property relationship governing controlled TiO₂ nanocrystals.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101701"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"\"Effect on microstructure, dielectric, and Ku-band electromagnetic behaviour of “Ni²⁺-substituted Cd–Al spinel ferrites\"","authors":"Shikhil S. Wanjari ,&nbsp;Amit V. Gongal ,&nbsp;Deoram V. Nandanwar ,&nbsp;K.G. Rewatkar ,&nbsp;Madhukar G. Dhonde ,&nbsp;Satish G. Goswami ,&nbsp;Ganesh C. Vandile ,&nbsp;Aditya V. Tiwari","doi":"10.1016/j.nanoso.2026.101699","DOIUrl":"10.1016/j.nanoso.2026.101699","url":null,"abstract":"<div><div>Ni_xCd_1-xAl_0.1Fe_1.9O₄ (NCAF) (x = 0.0–1.0) nanoferrites were synthesized via the sol–gel auto-combustion route and annealed at 800 °C to investigate the effect of Ni²⁺ substitution on microstructural and high-frequency electromagnetic properties. SEM analysis revealed a gradual reduction in grain size from 0.907 μm to 0.417 μm, while HR-TEM confirmed nanosized (29.7 nm) particles. Magnetic susceptibility (<em>χ′</em>_<em>AC</em>) increased with Ni²⁺ content, indicating improved magnetic response. In the Ku-band (12.4–18 GHz) demonstrated that Ni²⁺ substitution results in slight but systematic variations in dielectric (<em>ε′</em>: 3.70–3.08) and magnetic (μ′: 1.10–1.27) parameters. The dielectric response exhibits weak frequency dependence, while <em>ε″</em> remains relatively low, indicating moderate dielectric loss. The AC conductivity follows a frequency-dependent trend associated with hopping conduction, and non-Debye relaxation behaviour (10⁻¹¹ s) is observed. The loss tangent shows peaks (0.33 at 13.5 GHz), reflecting combined dielectric and magnetic loss contributions. Reflection loss (RL) values ranging from −13.97 to −30.52 dB were obtained for thicknesses between 1–8 mm, with improved attenuation observed near 13–15 GHz. These results indicate that Ni²⁺ substitution enables tuning of electromagnetic parameters and attenuation behaviour within the Ku-band.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101699"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green synthesis and assessment of MnP, Mn-Er doped, and Mn-Er composite NPs from Parthenium hysterophorus flower extract: A study on the antimicrobial, photodegradation and antioxidant capacity","authors":"Uday Singh Thakur ,&nbsp;Kuldeep Kumar ,&nbsp;Ashwani Kumar ,&nbsp;Naveen Thakur","doi":"10.1016/j.nanoso.2026.101679","DOIUrl":"10.1016/j.nanoso.2026.101679","url":null,"abstract":"<div><div>The objective of this study was to synthesize manganese (Mn) based nanoparticles (NPs) utilizing an economic, environmentally friendly and simple process. Pure manganese (MnP), erbium doped manganese (MnErD), and manganese- erbium composite (MnErC) NPs were synthesized using <em>Parthenium hysterophorus</em> L. flower extract. The synthesis was carried out using a waterbath maintained at 50 °C, without calcination or high temperature treatment. The structure, morphology and chemical composition of the NPs were assessed via XRD, SEM, TEM, EDX, FTIR, and XPS approaches. XRD confirmed NPs exhibited good crystallinity with sizes of 10–25 nm. The TEM and SEM images showed a mixture of elongated, spherical and rod-like structures. The rod shaped particles exhibited average length of 93 ± 2 nm and average radius of 7 nm. The calculated length to radius (aspect) ratio of these rods is approx 13 nm. A reduction in energy bandgap from 2.8 to 1.7 eV was observed with erbium doping. Antimicrobial activity was evaluated against <em>E. coli</em> (Gram negative bacteria), <em>S. aureus</em> and <em>B. subtilis</em> (Gram positive bacteria). Among all the above synthesised NPs, MnErC showed the strongest antibacterial performance mainly against <em>E. coli</em>. The antioxidant was activity evaluated using DPPH assay. MnErC NPs also showed maximum scavenging efficiency of 92.04%. In addition, MnErC NPs also showed superior photocatalytic degradation toward Malachite Green (97.35%), Bismarck Brown Y (97.29%), and Methylene Blue (96.59%) within 100 min under UV light. This study reveals that crystalline and functionally diverse NPs can be obtained via a cost efficient and environmentally friendly route. A simple waterbath method was adequate without the need for high temperature treatment. The findings suggest the strong potential of the prepared NPs for environmental and biomedical applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101679"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in thin-film and one-dimensional UV photodetectors: Materials, architectures, and thermal stability","authors":"Mohammad Istiaque Hossain ,&nbsp;Bashar Farooq ,&nbsp;Alaa Elsafi ,&nbsp;Abinisha Thiruchuthan ,&nbsp;Dhanup S. Pillai ,&nbsp;Brahim Aissa","doi":"10.1016/j.nanoso.2026.101687","DOIUrl":"10.1016/j.nanoso.2026.101687","url":null,"abstract":"<div><div>The increasing need of the new industrial, environmental, and biomedical fields has aggravated the research of ultraviolet (UV) photodetectors. This review discusses the advances in technology of UV photodetectors, their history of transformation through the traditional thin-film semiconductor technology to state-of-the-art one-dimensional (1-D) nanostructured technology. It is well known that wide bandgap semiconductors, (Al, In) GaN, diamond and SiC exhibit significantly better responsivity, thermal performance and response time than standard silicon-based photodetectors. Later developments have offered β-Ga₂O₃, GaN and ZnO nanowire networks, which utilize quantum confinement physics and increased surface area to provide high UV detection efficiency at high temperature operations such as in flame detection. Thermal resistance is highlighted as one of the most critical parameters to measure the preparation of lab prototypes to be used in practice. The structural design is demonstrated to have a considerable effect on the thermal behavior, which in turn determines the reliability of the device in general. As an ensemble, 1D nanostructured photodetectors have better sensitivity and enhanced stability at high-temperature conditions compared to thin-film photodetectors, and β-Ga₂O₃ is a promising material in the next generation of high-detectivity and thermally resilient UV photodetectors.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101687"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green-synthesized Y/Co Co-doped TiO2 nanoparticles from Lagenaria siceraria peel for enhanced photocatalytic and antibacterial performance","authors":"AKM Asif Iqbal ,&nbsp;Dewan Muhammad Nuruzzaman ,&nbsp;A.K.M. Parvez Iqbal","doi":"10.1016/j.nanoso.2026.101705","DOIUrl":"10.1016/j.nanoso.2026.101705","url":null,"abstract":"<div><div>This study reports a green synthesis route for pure and Y/Co co-doped TiO₂ nanoparticles using Lagenaria siceraria peel extract as a natural reducing and stabilizing agent. A key contribution of this work is the integration of plant-mediated synthesis with Y/Co co-doping to simultaneously tailor the structural, optical, photocatalytic, and antibacterial properties of TiO₂ within a single framework. X-ray diffraction confirmed that all synthesized samples retained the anatase phase, while peak shifting and strain analysis indicated successful incorporation of Y and Co into the TiO₂ lattice. FTIR, SEM, and EDX analyses further verified changes in bonding environment, reduced particle size, and effective dopant incorporation. UV-Vis spectroscopy revealed progressive band-gap narrowing after co-doping, demonstrating improved optical response compared with pure TiO₂. The crystallite size decreased from 9.77 nm to 8.23 nm, while the optical band gap decreased from 3.35 eV to 3.00 eV after Y/Co co-doping. These modifications led to enhanced functional performance, particularly in the photocatalytic degradation of methylene blue under UV irradiation, where the 3% Y/Co co-doped TiO₂ showed the highest degradation efficiency. The 3% Y/Co co-doped TiO₂ achieved a photocatalytic degradation efficiency of 92.45% after 120 min under UV irradiation. Antibacterial studies against S. aureus and E. coli also demonstrated stronger activity for the co-doped samples, supported by improved minimum inhibitory concentration values. In addition, brine shrimp lethality testing indicated increased biological activity at higher dopant concentration. Overall, the results show that Y/Co co-doping is an effective strategy for tailoring the physicochemical and biological properties of green-synthesized TiO₂ nanoparticles. Among the investigated compositions, 3% Y/Co co-doped TiO₂ exhibited the best overall performance, highlighting its potential for sustainable photocatalytic and antimicrobial applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101705"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}