Nanomaterials最新文献

{"title":"Reconfigurable Optoelectronic Logic Gates Enabled by a VSe₂/MoTe₂ van der Waals Heterojunction.","authors":"Kang Zhang, Wansong He, Ruya Cong, Xin Zhang, Jianzhi Gao, Yubing Tu, Suofu Wang, Mingsheng Long","doi":"10.3390/nano16191247","DOIUrl":"10.3390/nano16191247","url":null,"abstract":"<p><p>Optoelectronic logic gates that integrate optical inputs with electrical outputs offer a promising route toward high-bandwidth, low-power in-sensor computing. However, most existing implementations require precise control over the excitation wavelength, optical power, or gate bias, which complicates device fabrication and system integration. Here, we demonstrate a reconfigurable optoelectronic logic device based on a VSe₂/MoTe₂ van der Waals heterojunction. The device exhibits a rectification ratio exceeding 10³ in the dark and a pronounced photovoltaic response, including a light on/off ratio surpassing 10⁷, a responsivity of 0.28 A/W, and external quantum efficiency of 54%, as well as a noise-equivalent power of 4.6 × 10^-14 W/Hz^1/2 and a specific detectivity of 2.1 × 10¹⁰ cm Hz^1/2/W. By reconfiguring the source and drain electrodes and modulating the optical input, six fundamental Boolean logic operations-AND, IMP, NOR, NOT, OR, and NAND-are realized in the device. Notably, all six logic functions are obtained under fixed illumination and predefined bias, without requiring wavelength, power, or gate modulation. Switching between functions requires only a specific bias voltage and a change in the source/drain connection (for certain operations, OR and NAND, the input state is redefined). These results underscore the promise of two-dimensional material-based van der Waals heterojunctions for compact, low-power, and reconfigurable optoelectronic logic processing.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666891/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Optimization of Segmented Thermoelectric Generator with Wavy Structure and Nanofluid Cooling: Variable Structure.","authors":"Edgar Alan De Los Santos-Castañeda, Sara Eunice Olivares-Hernández, Miguel Ángel Olivares-Robles, Pedro Guevara-López","doi":"10.3390/nano16191248","DOIUrl":"10.3390/nano16191248","url":null,"abstract":"<p><p>Thermoelectric generators (TEGs) are highly sensitive to both geometric configuration and thermal boundary conditions, particularly the heat dissipation mechanisms at the cold side. Despite extensive research on thermoelectric materials, cooling strategies, and geometric optimization, the coupled influence of hollow sinusoidal geometries and convective cooling conditions remains insufficiently understood. Therefore, this work presents an integrated electrothermal optimization of a segmented hollow sinusoidal thermoelectric generator using a finite element model developed in ANSYS Workbench 2023 R1. The proposed TEG is composed of hollow thermoelements segmented with Bi₂Te₃ and skutterudite using a fixed segmentation ratio. Attention is given to the effects of the revolution distance (dr) and inter-leg spacing (D), geometric parameters that have received limited attention in previous studies. The performance of the device was evaluated by varying the revolution distance from 0.15 mm to 0.58 mm under applied heat fluxes (q″) ranging from 5000 to 35,000 W/m2. Additionally, the influence of inter-leg spacing on voltage generation was systematically investigated. Cooling conditions included both an idealized constant-temperature boundary condition of 25 °C, employed for model validation, and convective cooling conditions based on TiO2, graphene, distilled water, Fe3O4, and Al2O3 nanofluids. The convective heat transfer coefficients were determined from nanofluid thermoelectric properties and implemented as thermal boundary conditions at the cold side of the thermoelectric generator. Among the cooling media evaluated, TiO2-based cooling exhibited the closest performance to constant-temperature condition. Nevertheless, the assumption of a constant cold-side temperature was found to overestimate the thermoelectric performance compared with convective cooling conditions scenarios. The results revealed that both geometric parameters and cooling conditions significantly affect the electrothermal behavior of the device. The maximum output voltage of approximately 0.39 V was obtained for dr=0.15 mm under TiO2-based cooling and an applied heat flux of 35,000 W/m2. Increasing the revolution distance from 0.15 mm to 0.58 mm reduced voltage generation. Furthermore, the inter-leg spacing exhibited a non-linear influence on voltage generation, highlighting the complex interaction between geometry and thermal transport mechanisms. The findings also demonstrate the importance of simultaneously considering revolution distance, inter-leg spacing, thermal loading, and convective nanofluid-based cooling conditions during thermoelectric generator design and optimization.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Mesoporous Silica-Supported MOF Composites for CO₂ Capture: Fabrication, Synergistic Effects, and Limitations.","authors":"Chunling Xin, Dongqi Song, Lili Liu, Xiaojing Zhou, Dan Li, Wei Zhang, Yi Yu, Xia Wang, Xishi Tai","doi":"10.3390/nano16191249","DOIUrl":"10.3390/nano16191249","url":null,"abstract":"&lt;p&gt;&lt;p&gt;The continuous rise in atmospheric carbon dioxide (CO&lt;sub&gt;2&lt;/sub&gt;) concentration poses a severe challenge to the global climate, creating an urgent need for the development of efficient, stable, and economically viable carbon-capture technologies. Metal-organic frameworks (MOFs), with their ultra-high specific surface area and tunable pore architecture, have demonstrated significant potential for CO&lt;sub&gt;2&lt;/sub&gt; adsorption. However, single MOF materials are typically constrained by limitations such as high mass transfer resistance, poor hydrothermal stability, and difficulties in processing their powdered form. Coupling MOF with ordered mesoporous silica (MS) to construct hierarchical MOF@MS composite materials has been proven to be an effective strategy for overcoming these shortcomings. This review systematically summarizes the recent research progress on mesoporous silica-supported MOF composite materials for CO&lt;sub&gt;2&lt;/sub&gt; capture. First, an architecture-based taxonomy is established in which every composite is assigned according to five decision rules-nucleation site, synthesis sequence, spatial arrangement of the two phases, interfacial bonding, and the intended role of the mesoporous silica-and six architecture classes are distinguished; systems that lack either a crystalline MOF phase or a siliceous mesoporous phase (MOF-on-MOF hybrids, wood-supported MOF, and amine-loaded silica) are explicitly excluded from the comparative analysis. Second, the principles, advantages, and drawbacks of the individual preparation routes, including in situ growth, confined growth, layer-by-layer assembly, post-synthetic assembly, selective etching, physical mixing, and macroscopic shaping, are discussed in detail and mapped onto that taxonomy. Third, the multiple synergistic adsorption mechanisms between mesoporous silica and MOF are deeply analyzed, encompassing the optimization of mass transfer by hierarchical pore structures, the enhancement of active site accessibility and stability through interfacial bonding, and the improvement of CO&lt;sub&gt;2&lt;/sub&gt; selectivity via functional group modification. On this basis, this review objectively examines the core challenges and limitations currently faced in this field, such as pore blockage, weak interfacial interactions, performance degradation under realistic flue-gas conditions (containing moisture and impurities), and high costs associated with large-scale preparation. Finally, to address these issues, future research directions are proposed from five perspectives: developing novel stable composite materials, optimizing green scalable synthesis processes, deepening multi-scale theoretical simulations, establishing standardized evaluation systems oriented toward realistic operating conditions, and exploring multifunctional integrated and stimuli-responsive materials. This review aims to provide focused and systematic guidance for the rational design of next-generation MOF@MS adsorbents for CO&lt;sub&gt;2&lt;/sub&gt; c","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667008/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Inorganic-Ion-Stabilized Au Nanoparticles Supported on SiO₂: Synthesis, Physicochemical Characterization, and Proof-of-Concept Raman Response Toward Methylene Blue.","authors":"Jorge Luis Mendoza Tellez, Omar E Uribe-Juárez, Bruno Landeros-Rivera, Alba Adriana Vallejo-Cardona, Diana M Osorio-Londoño, Federico González García, Francisco Tzompantzi, Raúl Pérez-Hernández, Rebeca Sosa Fonseca, Luis Alberto Moreno Ruiz, Ana María Soto-Estada, Iris N Serratos","doi":"10.3390/nano16191243","DOIUrl":"10.3390/nano16191243","url":null,"abstract":"<p><p>Silica nanostructures are attractive platforms for hybrid nanomaterials because of their chemical stability and versatile surface functionalization. Here, spherical SiO₂ nanoparticles were synthesized by a modified Stöber method, functionalized with (3-aminopropyl)triethoxysilane (APTES), and decorated with gold nanoparticles (AuNPs) formed using an inorganic stabilization strategy involving OH^- and Cl^- ions, without conventional organic AuNP capping agents. Complementary characterization by Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS DRS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) supported the sequential surface modification and formation of the SiO₂-APTES-AuNPs hybrid material. TEM yielded average diameters of 100.81 ± 1.74 nm for SiO₂ nanoparticles (<i>n</i> = 50) and 2.00 ± 0.31 nm for supported AuNPs (<i>n</i> = 80). Methylene blue (MB) was subsequently used for a proof-of-concept Raman evaluation. At 10^-3 and 10^-4 M MB, relative Raman signal-amplification ratios of approximately 7.5 and 3.5, respectively, were obtained from the integrated response near 1620 cm^-1; these values are not conventional surface-enhanced Raman scattering (SERS) enhancement factors. At 10^-6 M, a fluorescence-like background was observed without establishing metal-enhanced fluorescence. Density functional theory calculations using an Au₃₂ cluster provided qualitative insight into local S···Au and π···Au interactions. Overall, these results establish an inorganic SiO₂-AuNPs as a physicochemically characterized hybrid nanomaterial prepared through an inorganic AuNP-stabilization strategy and support its further investigation in Raman-based applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667054/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Recovering Pressure-Independent Dilute-Gas Thermal Conductivity from Molecular Dynamics: Green-Kubo Sampling Sensitivity and NEMD Finite-Size Effects.","authors":"Matthew Riggs, Atal Bhowmik, Murat Barisik","doi":"10.3390/nano16191241","DOIUrl":"10.3390/nano16191241","url":null,"abstract":"<p><p>Gas thermal conductivity is important in many engineering systems, but reliable data are not available for every gas, mixture, temperature, and pressure. Molecular dynamics can help fill this gap by predicting transport directly from molecular motion. However, gas simulations face time- and length-scale limitations that are different from those commonly encountered in liquids and solids. These limitations are not always recognized, and standard molecular dynamics tools are often used without checking whether their settings are suitable for dilute gases. This study uses the pressure-independent thermal conductivity of dilute argon as a benchmark for evaluating equilibrium and nonequilibrium molecular dynamics methods. At fixed temperature, changing pressure changes the mean free path and collision time even though the bulk thermal conductivity remains constant. Green-Kubo calculations at 300 K and 1 atm produced values from 0.009 to 0.022 W m^-1 K^-1 as the sampling interval and correlation length were varied, compared with the expected value of about 0.0175 W m^-1 K^-1. Some settings reproduced the expected value without showing convergence, demonstrating the risk of using Green-Kubo as a black-box calculation. NEMD simulations from 0.2 to 1.0 atm showed that the apparent conductivity increased with longitudinal system size and approached similar asymptotic values across pressure. The results recover pressure-independent gas thermal conductivity while showing that decreasing pressure increases the molecular length and time scales relevant to MD simulations. Reliable gas-property prediction therefore requires direct checks of Green-Kubo time scales and NEMD system-size dependence.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667058/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Sustainable Synthesis of Zinc Oxide and Its Application in Water Contaminant Removal.","authors":"Piotr Dulian, Olena Sachuk, Olena Kiziun, Liudmyla Kotynska, Valery Zazhigalov, Marta Żurek, Janusz Jaglarz, Witold Żukowski","doi":"10.3390/nano16191244","DOIUrl":"10.3390/nano16191244","url":null,"abstract":"<p><p>This study explores the sustainable synthesis of zinc oxide (ZnO) from industrial waste and its application in removing water contaminants such as chloramphenicol (CAP), metronidazole (MNZ), and prometryn (PROM). ZnO synthesized from zinc production waste (ZnO(2)) exhibited competitive photocatalytic performance compared to commercial ZnO (ZnO(1)), achieving 79% CAP degradation (Kd = 0.53 × 10^-2 min^-1) and 72% MNZ degradation (Kd = 0.43 × 10^-2 min^-1) under UV light, while showing higher activity in PROM degradation (32% removal) due to its mesoporous structure. Although ZnO(2) had a slightly lower specific surface area (24.9 m²/g) and pore volume (0.26 cm³/g) than ZnO(1), it demonstrated significant environmental and economic benefits by repurposing industrial waste. Catalytic tests in ethanol oxidation revealed ZnO(2) required higher temperatures for full conversion but exhibited higher acetaldehyde selectivity (70%). These findings highlight the potential of waste-derived ZnO as a sustainable alternative for water treatment and catalytic processes, aligning with circular economy principles and reducing reliance on natural resources.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Research Progress in Phase-Structure Evolution and Electro-magnetic-Wave Absorption Performance of Aluminosilicate Mineral-Based Ceramics.","authors":"Zhongyi Bai, Qichen Zhang, Song Li, Chunjiang Li, Biao Zhao, Mengjie Wang, Xuwen Li, Rong Wang, Xiaoqin Guo","doi":"10.3390/nano16191245","DOIUrl":"10.3390/nano16191245","url":null,"abstract":"<p><p>High-temperature electromagnetic functional ceramics require matrix phases, such as alumina and mullite, that combine resistance to high temperatures and oxidation with low density. Aluminosilicates derived from natural minerals or solid wastes can reduce material costs and introduce additional electromagnetic responses through associated iron-, carbon-, and alkali-metal-containing components. However, fully exploiting these advantages requires coordinated control of activation, separation, molten salt recovery, and heat treatment. This review systematically examines six precursor types-kaolin, perlite, sillimanite, red mud, fly ash, and coal gangue-with particular emphasis on their phase characteristics, phase-structure evolution and regulation mechanisms in molten-salt environments, porous-structure construction, and electromagnetic functionalization. Current evidence indicates that kaolin and sillimanite primarily follow mullitization pathways, whereas mullitization of perlite requires exogenous aluminum components. Under defined carbon-source and atmospheric conditions, fly ash, coal gangue, and red mud can form multiphase composites containing carbon, iron-based phases, and aluminosilicates. This review synthesizes the relationships among precursor composition, phase-structure evolution pathways, and interfacial structure, and identifies high-temperature in situ electromagnetic characterization, improved oxidation stability, and scalable preparation as key priorities for future research. Perlite is discussed more briefly because quantitative electromagnetic-wave absorption data for perlite-derived ceramics remain limited.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666749/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Fe-Based Amorphous Microflakes with Deformation-Induced Nanoscale Heterogeneity Prepared by Pulse-Discharge Atomization and Ball Milling for Broadband Microwave Absorption.","authors":"Chekai Liu, Xinghua Wang, Zonghai Zhao, Rui Ding, Yanming Wu, Chenghui Hu, Wei Xue, Jingwu Liu, Xinghao Wei","doi":"10.3390/nano16191242","DOIUrl":"10.3390/nano16191242","url":null,"abstract":"<p><p>Fe-based amorphous alloys are attractive for microwave attenuation because they combine soft-magnetic behavior, relatively high electrical resistivity compared with compositionally similar crystalline alloys, and flexible structural design. A persistent challenge is to achieve strong attenuation and broad bandwidth at a small matching thickness without relying on complex multiphase architectures. Fe₈₅P₉C₂B₂Si₂ amorphous powders were prepared by pulse-discharge atomization and the fine spherical fraction was subsequently flattened by controlled wet-ball milling. The atomized powders remain predominantly amorphous, whereas milling produces high-aspect-ratio microflakes together with localized approximately 5 nm band-like heterogeneous regions containing limited nanocrystalline order. Relative to the spherical powders, FP5 shows stronger dielectric and magnetic responses. At 16.9 GHz and a thickness of 1.7 mm, the attenuation constant reaches 235.9 m^-1 and the normalized input-impedance magnitude is 0.999, indicating that strong intrinsic attenuation coincides with nearly ideal impedance matching. FP5 consequently exhibits a minimum reflection loss of -53.5 dB and an effective absorption bandwidth of 6.2 GHz (11.8-18.0 GHz) at 1.85 mm. The results indicate that the high-aspect-ratio morphology is the better-supported primary structural contribution to the improved absorption, while local amorphous/nanocrystalline heterogeneity may provide an additional contribution.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666872/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Degradation Performance and Mechanism of Methyl Orange by Iron-Modified Sludge Biochar-Activated Peroxymonosulfate.","authors":"Meng-Yuan Li, Jiang-Li Yu, Mei-Qi Ren, Tao Hou, Dan Cui","doi":"10.3390/nano16191233","DOIUrl":"10.3390/nano16191233","url":null,"abstract":"<p><p>Azo dye wastewater poses a persistent environmental challenge because of its high toxicity, poor biodegradability, and widespread occurrence in textile and dyeing effluents, highlighting the need for efficient and sustainable treatment technologies. In this study, iron-modified sludge biochar (Fe@SBC) was prepared via impregnation-pyrolysis and employed to activate peroxymonosulfate (PMS) for methyl orange (MO) degradation, providing a dual benefit of sludge valorization and pollutant removal. Iron modification increased the specific surface area from 50.93 to 66.54 m²·g^-1 and total pore volume from 0.085 to 0.309 cm³·g^-1, while introducing Fe₃O₄, Fe²⁺/Fe³⁺ redox pairs, and oxygen-containing functional groups that significantly enhanced electron transfer. The Fe@SBC/PMS system achieved 95.2 ± 0.2% MO removal within 25 min under optimal conditions, notably outperforming unmodified biochar (86.0 ± 0.6%). The catalyst exhibited excellent pH adaptability (3-11) and maintained 88.0 ± 0.8% removal after five cycles. Quenching experiments and EPR analysis identified singlet oxygen (¹O₂) as the dominant reactive species (~80% contribution), with sulfate and hydroxyl radicals playing auxiliary roles. LC-MS analysis proposed three parallel degradation pathways involving azo bond cleavage, hydroxylation, and desulfonation. These findings demonstrate that Fe@SBC is an effective PMS activator and provide mechanistic insight into the design of sludge-derived carbon catalysts for advanced oxidation processes, offering a promising approach for simultaneous sludge resource recovery and azo dye wastewater treatment.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667204/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"A Novel Graphene Oxide/γ-Alumina Hybrid Nano-Adsorbent Integrated into Polyurethane Foam for Adsorption of Industrial Pollutants from Wastewater.","authors":"Salar Sadri, Mohammad Hassan Vakili, Nader Mokhtarian","doi":"10.3390/nano16191239","DOIUrl":"10.3390/nano16191239","url":null,"abstract":"<p><p>This study reports the synthesis, characterization, and wastewater treatment performance of a hybrid nanocomposite based on graphene oxide (GO) and γ-alumina (γ-Al₂O₃). Functionalization was carried out via silanization using GPTMS for GO and APTES for γ-Al₂O₃, followed by covalent grafting through epoxy-amine linkage. FTIR spectroscopy confirmed successful grafting, showing Si-O-Si stretching and reduced epoxy ring vibrations. BET analysis indicated that the GO/γ-Al₂O₃ hybrid (ALGO) preserved a high specific surface area (198.08 m²/g), comparable to commercial γ-Al₂O₃, demonstrating that GO did not hinder porosity. ALGO was incorporated into polyurethane foam at loadings of 1-5% (ALGO@PU foam) and applied in wastewater treatment. UV-Vis spectroscopy revealed strong affinity for silver ions, evidenced by a decrease in AgNO₃ absorbance (~430-600 nm) with increasing AlGO content. Treatment of real industrial wastewater showed significant reductions in chemical oxygen demand (COD), biological oxygen demand (BOD), and turbidity. At 5% loading, COD and BOD decreased from 1162 and 480 mg/L to 64 and 11 mg/L, respectively, while turbidity dropped from >1100 NTU to 1.62 NTU. These results demonstrate that ALGO is a functional adsorbent capable of removing ion metals, and improving water clarity, highlighting its potential for industrial wastewater treatment applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666717/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}