FlatChem最新文献

{"title":"Reversible hydrogen storage of light transition metal-functionalized C9N4 monolayers under ambient conditions","authors":"Naseer H. Kadhim ,&nbsp;Hyeonhu Bae ,&nbsp;Tanveer Hussain ,&nbsp;Heider A. Abdulhussein","doi":"10.1016/j.flatc.2025.100902","DOIUrl":"10.1016/j.flatc.2025.100902","url":null,"abstract":"<div><div>Driven by the potential of hydrogen (H₂) as a sustainable alternative to conventional energy sources, we have conducted spin-polarized density functional theory (DFT) calculations to examine the viability of a two-dimensional porous C₉N₄ monolayer as an efficient H₂ storage material. Our findings reveal that the adsorption energy of H₂ molecules on the pristine C₉N₄ is insufficient for effective storage. However, when the C₉N₄ monolayer is decorated with selected light transition metals (Sc, Ti, V), the adsorption energy improves significantly. We find that a 2 × 2 supercell of C₉N₄ can accommodate a maximum of four dopants of Sc, Ti and V. The resulting TMs-decorated C₉N₄ structure (TMs@C₉N₄) can adsorb up to 28 H₂ molecules, with average adsorption energies of −0.245, −0.337, and − 0.320 eV of the systems 4Sc@C₉N₄, 4Ti@C₉N₄, and 4 V@C₉N₄, respectively, satisfying the targets set by the US Department of Energy (DOE). Additionally, the gravimetric H₂ densities reach 9.93, 9.72 and 9.52 wt% for 4Sc@C₉N₄, 4Ti@C₉N₄, and 4 V@C₉N₄, respectively. Furthermore, electronic and magnetic analyses indicate that TMs@C₉N₄ has the potential to serve as a superior candidate for energy storage applications. Finally, we explore the H₂ storage at practical conditions of pressure and temperature using the Langmuir-adsorption model.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100902"},"PeriodicalIF":5.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction and synthesis of S-WO₃/BiInOCl photocatalyst via synergistic ion doping and heterojunction engineering for efficient degradation of MB","authors":"Chenxi Cui ,&nbsp;Lingxiu Shu ,&nbsp;Changchun Chen ,&nbsp;Xia Xu ,&nbsp;Zhixiong Huang ,&nbsp;Zisheng Guan ,&nbsp;Yifeng Wang ,&nbsp;Lin Pan","doi":"10.1016/j.flatc.2025.100901","DOIUrl":"10.1016/j.flatc.2025.100901","url":null,"abstract":"<div><div>The rapid industrialization has exacerbated organic pollutant emissions, while conventional treatment methods suffer from inefficiency and high operational costs. Photocatalysis attracts considerable interest given its efficiency and eco-friendliness. A sulfur-doped WO₃ (denoted as S-WO₃)/BiInOCl composite photocatalyst was constructed via a facile hydrothermal method. The photocatalytic properties of composites were thoroughly explored through the evaluation of their organic dye decomposition. The micromorphology, band structure, and carrier migration mechanism of these composites were analyzed using diversified characterization techniques. The findings reveal Sulfur-doped ability to decrease the bandgap of WO₃, broaden its light absorption spectrum, and significantly increase its photocatalytic efficacy. Adding BiInOCl improves the stacking order in S-WO₃ and facilitates the dissociation of electron-hole pairs originating from the heterojunction. More importantly, S-scheme heterojunction was successfully built at the interface of S-WO₃ and BiInOCl material, which was corroborated by XPS spectra, photo-electrochemistry, radical trapping experiments, and EPR tests. The S-WO₃/BiInOCl composite photocatalyst exhibited a degradation efficiency of 98 % within 24 min, representing a 4.8-fold and 1.9-fold enhancement compared to S-WO₃ and BiInOCl, respectively. Moreover, after three experimental cycles, the hybrid photocatalyst retains significant degradation efficacy, demonstrating superior photochemical robustness and recyclable properties.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100901"},"PeriodicalIF":5.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring of hierarchical MoZrO3/MoS2 for unrivaled efficient Electrocatalytic oxygen evolution process","authors":"Rimsha Perveen ,&nbsp;Shumaila Bibi ,&nbsp;Mohammad Danish ,&nbsp;Sadia Atta ,&nbsp;Sobhy M. Ibrahim ,&nbsp;Sadam Hussain ,&nbsp;Muhammad Ahmad Wattoo ,&nbsp;Shu-Juan Bao ,&nbsp;Aziz Ur Rehman","doi":"10.1016/j.flatc.2025.100900","DOIUrl":"10.1016/j.flatc.2025.100900","url":null,"abstract":"<div><div>The fabrication of earth-abundant and highly efficient electrocatalysts to replace benchmark materials such as RuO₂ and IrO₂ has attained significant attention from experts for advancing clean energy processes, particularly through the oxygen evolution reaction (OER) in alkaline solutions. Presented work describes a new two-dimensional MoS₂ nanoflower doped with molybdenum and zirconium (MoZrO₃/MoS₂) synthesized via a facile and efficient in situ hydrothermal strategy. This robust and cost-effective electrocatalyst demonstrates superior activity, stability, and scalability for electrocatalytic applications. The MoZrO₃/MoS₂ nanostructure exhibits a highly synergistic interaction, probably due to the incorporation of the metallic MoZrO₃ phase, which significantly enhances electronic conductivity, reduces charge transfer resistance, and maximizes active site availability. Comprehensive characterization, including FTIR, XRD, and SEM analyses, confirmed the crystalline and structural integrity of the synthesized material. Notably, the MoZrO₃/MoS₂ composite achieved an impressively low overpotential of 0.252 V at 10 mA cm⁻², outperforming both pristine MoS₂ (0.303 V) and CuZrO₃/MoS₂ (0.283 V) in identical conditions. The nanocomposite also exhibits exceptional kinetics with a Tafel slope of 43.5 mV dec⁻¹ and robust long-term stability, maintaining performance over 24 h of continuous operation. DFT analysis further validates the synergistic interaction by revealing reduced bandgap, enhanced density of states, and favorable charge distribution at the interface, supporting the experimentally observed high OER activity. These remarkable properties highlight the ability of MoZrO₃/MoS₂ as a stable, efficient, scalable and heterostructured electrocatalyst for OER. This study not only highlights a promising pathway for the design earth-abundant materials electrocatalysts as alternative to noble-metal-based catalysts for future innovations in cost-effective and sustainable energy conversion technologies.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100900"},"PeriodicalIF":5.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From charge transfer to sustainability: A multifaceted DFT approach to ionic liquid design","authors":"Danish Ali ,&nbsp;Muhammad Arif Ali ,&nbsp;Afifa Yousuf ,&nbsp;Hong-Liang Xu","doi":"10.1016/j.flatc.2025.100899","DOIUrl":"10.1016/j.flatc.2025.100899","url":null,"abstract":"<div><div>This study employs density functional theory (DFT) at the M06-2×/6–31 + g(d,p) level to investigate the structural, electronic, and thermodynamic properties of ammonium ([AM]⁺), phosphonium ([PH]⁺), and sulfonium ([SU]⁺) ionic liquids (ILs) paired with halide ([Br]⁻, [Cl]⁻, [F]⁻) and sulfonate ([CF₃SO₃]⁻, [CH₃SO₃]⁻) anions. Frontier molecular orbital (FMO) analysis reveals [PH]⁺[Br]⁻ as the most reactive IL pair with the smallest energy gap (5.57 eV), while [SU]⁺[CF₃SO₃]⁻ exhibits the highest stability (8.58 eV). Potential energy surface (PES) scans demonstrate substantial rotational energy barriers, confirming strong cation-anion interactions. Natural bond orbital (NBO) analysis shows [PH]⁺[Br]⁻ has the highest binding energy (−530.55 kcal/mol), supported by energy decomposition analysis (EDA) indicating dominant orbital stabilization. Net population analysis (NPA) reveals significant charge transfer, with [PH]⁺[Br]⁻ displaying optimal electrostatic complementarity. Thermodynamic calculations confirm the spontaneous formation of all IL pairs. Independent gradient model based on Hirshfeld (IGMH) and quantum theory of atoms in molecules (AIM) analyses validate non-covalent interactions and thermal stability. The [PH]⁺[Br]⁻ pair exhibits exceptional orbital stabilization (<em>E</em>⁽²⁾ = 10.73 kcal/mol) and low rotational barriers, making it a promising candidate for catalytic applications. This comprehensive computational study provides fundamental insights into IL design, highlighting the interplay between electronic structure, charge distribution, and intermolecular interactions. The results establish a framework for developing stable, reactive ILs for green chemistry and energy applications, with [PH]⁺[Br]⁻ emerging as a particularly efficient system.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100899"},"PeriodicalIF":5.9,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From morphology control to photocatalytic activity: Magnetized water for the innovative and green synthesis of 2D layered BiOI and its application in the photodegradation of organic dyes using central composite design (CCD)","authors":"Sara Abolhasani ,&nbsp;Ali Ahmadpour ,&nbsp;Mostafa Gholizadeh","doi":"10.1016/j.flatc.2025.100896","DOIUrl":"10.1016/j.flatc.2025.100896","url":null,"abstract":"<div><div>This study explores the innovative use of ordinary water as an eco-friendly solvent magnetized by a solvent magnetizing apparatus (SMA), which is referred to as magnetized water. This magnetized water is then used as a solvent to synthesize bismuth oxyiodide (BiOI) photocatalysts. Moreover, the morphologies and photocatalytic activity of the synthesized BiOI are investigated and compared with structures obtained using ordinary water. Techniques such as XRD, FESEM, BET, UV–Vis spectroscopy, PL, photocurrent response, DRS, and EIS were used to understand the characteristics and properties of the photoactive nanostructures. By optimizing the exposure time of the magnetic field applied to the water, the morphology of BiOI structures was effectively controlled, resulting in the formation of three-dimensional flower-like nanostructures from two-dimensional nanosheets. The photocatalytic performance of BiOI was evaluated under visible light irradiation, demonstrating enhanced performance with approximately 95 % degradation for Rhodamine B (RhB) by Bi−15 and Congo Red (CR) by Bi-1 pass photocatalysts in almost 45 min. Statistical analysis using Design Expert software highlighted the significant effect of pH, irradiation time, and photocatalyst dosage on the degradation. Kinetic studies followed first-order kinetics according to the pseudo-first-order model for both RhB and CR degradation. Finally, the stability of the photocatalysts was investigated, and no significant decrease in the performance of photocatalysts was observed after five cycles. Additionally, using magnetized water can lower synthesis costs by enhancing reaction efficiency and reducing the need for expensive chemicals and energy.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100896"},"PeriodicalIF":5.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailored nanoarchitectonics of PPy/g-C3N4/MnO2 hybrid on NiCo LDH for enhanced energy storage in supercapacitors","authors":"Hariprasath Rangaraju ,&nbsp;Priyadharshini Matheswaran ,&nbsp;Pin-Yi Chen ,&nbsp;Nirmal Kumar Sakthivel ,&nbsp;Krishnamoorthy Shanmugaraj ,&nbsp;Pazhanivel Thangavelu ,&nbsp;Mani Govindasamy","doi":"10.1016/j.flatc.2025.100897","DOIUrl":"10.1016/j.flatc.2025.100897","url":null,"abstract":"<div><div>The growing demand for efficient energy storage devices holding high specific energy has accelerated the search for advanced electrode materials. Transition metal-based layered double hydroxides (LDHs), particularly those containing nickel (Ni) and cobalt (Co), have emerged as promising candidates due to their tunable layered structure and chemical composition. In this study, LDH and its hybrids were prepared using a simple hydrothermal technique. In addition, X-ray diffraction (XRD) measurements approve the presence of H₂O molecules and carbonate anions in the interlamellar space due to their extended interlayer spacing. The quaternary NiCo LDH/manganese dioxide (MnO₂)/polypyrrole (PPy)/graphitic carbon nitride (g-C₃N₄) hybrid nanocomposite exhibits a specific capacitance of 2389 F/g at 1 A/g, with 88 % retention after 5000 cycles at a higher current density of 10 A/g. The superior electrochemical performance is accredited to reduced aggregation and enhanced electronic conductivity. Charge storage kinetics were analysed using Dunn's method and power law, reveals increased diffusive contribution in the quaternary nanocomposite. A hybrid supercapacitor device was fabricated using quaternary hybrid as cathode and activated carbon (AC) as anode delivers a high specific capacitance of 260 F/g at 1 A/g, with 95 % cyclic stability after 10,000 cycles. The assembled device achieves a specific energy of 82 Wh/kg at a specific power of 750 W/kg and a coulombic efficiency of 99 %, demonstrating excellent potential for energy storage applications.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100897"},"PeriodicalIF":5.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of electrochemical properties of NiAl-LDH@NiCoSe2 nanocomposite for asymmetric supercapacitor application","authors":"Huda Fazal ,&nbsp;Iftikhar Hussain Gul ,&nbsp;Marghoob Ahmed ,&nbsp;Rajab Hussain ,&nbsp;Ghulam Ali","doi":"10.1016/j.flatc.2025.100894","DOIUrl":"10.1016/j.flatc.2025.100894","url":null,"abstract":"<div><div>Innovative energy storage solutions such as supercapacitors (SCs) have been developed to meet the increasing energy demands of the modern world. Hybrid metal chalcogenides have drawn significant interest as electrode active materials for supercapacitors, owing to their layered structure, substantial redox chemistry, fast ion diffusion properties, and versatile morphology. In this study, the NiCoSe₂ nanoparticles hybrid nanocomposites were synthesized with variations of NiAl-LDH nanosheets using the hydrothermal method. NAL@NCS hybrid nanocomposite grown on a Ni-foam exhibited a high specific capacitance of 1092 F g⁻¹ at the current density of 0.5 A g⁻¹. In addition, the NAL@NCS was used as a positive electrode with activated carbon (AC) as a negative electrode to assemble the asymmetric supercapacitor device. Due to the synergetic effect, the NAL@NCS||AC device exhibited a specific capacitance of 674 F g⁻¹ at the current density of 1 A g⁻¹, had an energy density of 304 W h Kg⁻¹ at the power density of 3.42 kW Kg⁻¹ and exceptional stability of 82 % retention after 10,000 cycles at a current density of 30 A g⁻¹. This was mainly due to increased electrochemical surface area and sufficient electron transfer rate in NAL@NCS nanocomposite. This study indicates that the prepared NAL@NCS hybrid nanocomposite is a promising candidate for the supercapacitor practical application.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100894"},"PeriodicalIF":5.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ionic liquid-aided liquid phase exfoliation of graphene and improved electric and electromagnetic properties of PLA/EVA/graphene composites","authors":"Alessandra de A.P. Gabino ,&nbsp;Bluma G. Soares ,&nbsp;Elaine F. da Silva","doi":"10.1016/j.flatc.2025.100893","DOIUrl":"10.1016/j.flatc.2025.100893","url":null,"abstract":"<div><div>The dispersion of carbonaceous fillers in polymeric matrices presents a significant challenge due to the difference in surface energy between fillers and the polymers. In this study, a straightforward and cost-effective method was employed to exfoliate graphene nanoplatelets (GNP) in water using the liquid phase exfoliation (LPE) technique, with ionic liquids (ILs) serving as surfactants. The treated graphene was subsequently incorporated into PLA/EVA (60:40 wt%) composites, which were evaluated for their rheological and alternating current (AC) electrical properties, as well as their electromagnetic absorptivity in the X and Ku Band (8.2 to 18 GHz). Raman spectroscopy confirmed modifications in the GNP structure, indicating successful exfoliation. Fourier-transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) revealed that a portion of IL adhered to the GNP particles and was thus incorporated into the polymeric composites. The synthesized imidazole sultone-based IL promoted more intense exfoliation and particle fragmentation, leading to a reduction of electrical conductivity and electromagnetic absorptivity of the composite. In contrast, commercial IL, bmim.BF₄, not only enhanced GNP dispersion but also influenced the morphology of the PLA/EVA composite, improving the continuity of EVA phase. This modification significantly lowered the composite's electrical percolation threshold and endowed the material with outstanding electromagnetic absorptivity properties, achieving a reflection loss (RL) below −30 dB and an effective absorption bandwidth (EAB) of 3.67 GHz, covering nearly the entire Ku-band frequency range, with only 5.0 wt% of treated GNP. This study provides novel insights into GNP exfoliation techniques utilizing environmentally friendly solvent and surfactants, and the fabrication of partially biodegradable polymeric composites for electromagnetic absorption applications, such as packaging in electronic devices.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100893"},"PeriodicalIF":5.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective photostability improvements of rhodamine 6G film via antioxidant addition","authors":"Hanyu Liu ,&nbsp;Mingcai Xie ,&nbsp;Jinling Ma ,&nbsp;Zhihong Wei ,&nbsp;Daocheng Hong ,&nbsp;Yuxi Tian","doi":"10.1016/j.flatc.2025.100892","DOIUrl":"10.1016/j.flatc.2025.100892","url":null,"abstract":"<div><div>Photostability is a crucial parameter of fluorescent dyes for their applications as probes, sensors, and labels. However, most dyes face a significant challenge of photobleaching under continuous light excitation in the format of film. In this study, we discovered that the photostability of Rhodamine 6G films can be significantly enhanced by the addition of ascorbic acid (AA). Such improvement of photostability by AA is also proved to be effective at single molecule level. We attributed the photostability improvement to the efficient elimination of the triplet state and free radicals of Rh-6G by AA via electron transfer, allowing for rapid recovery to the fluorescent state, and reduce the probability to react with oxygen. This finding not only offers an effective strategy for improving the photostability of fluorescent dyes with potential applications in molecular devices, but also enhances our understanding of the underlying photophysical and photochemical mechanisms.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100892"},"PeriodicalIF":5.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-large memory window for non-volatile memory based on ReS2/hBN/Multilayer Graphene heterojunction","authors":"Jiawang You ,&nbsp;Wenxiang Wang ,&nbsp;Xiaohuan Li ,&nbsp;Yushi Xu ,&nbsp;Jinjin He ,&nbsp;Han Mao ,&nbsp;Zheng Wei ,&nbsp;Lianfeng Sun ,&nbsp;Xiaoqing Chen ,&nbsp;Yong Jun Li ,&nbsp;Zheng Liu ,&nbsp;Hang Wei ,&nbsp;Mei Xue","doi":"10.1016/j.flatc.2025.100886","DOIUrl":"10.1016/j.flatc.2025.100886","url":null,"abstract":"<div><div>With the rapid advancement of technology and the exponential growth of big data, the demand for high-performance memory devices intensifies. Non-volatile memories based on van der Waals materials garner significant attention due to their superior data retention and long-term storage capabilities. However, current floating-gate (FG) memories typically exhibit a memory window of less than 60 %, which limits data storage stability and device lifespan. Therefore, developing non-volatile FG memories with larger memory windows is crucial for modern digital technologies. In this work, we fabricate a non-volatile FG memory device based on a rhenium disulfide (ReS₂)/hexagonal boron nitride (hBN)/multilayer graphene (MLG) heterostructure, ReS₂ serves as the channel material, hBN acts as the tunneling dielectric, and multilayer graphene functions as the floating gate. Due to the high carrier mobility of ReS₂ and the excellent charge storage and release capabilities of graphene, the device demonstrates a high on/off ratio (10⁶) and outstanding long-term data retention (&gt;1000 s). It also exhibits low programming current and the potential for multi-level storage applications. Most notably, the device achieves a significant memory window of 85.5 %, enabling enhanced charge storage capacity and improved stability. This performance is attributed to the effective charge injection and retention enabled by Fowler–Nordheim tunneling through the hBN tunneling barrier These exceptional properties support the realization of efficient and stable data storage, which paves the way for developing next-generation memory technologies.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100886"},"PeriodicalIF":5.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}