FlatChem最新文献

{"title":"Ag/nitrogen-doped graphene composite prepared by electroless plating for excellent electromagnetic shielding performance","authors":"Bing Wei,&nbsp;Yupei Li,&nbsp;Changyu Liu,&nbsp;Qingwen Qu,&nbsp;Xiaolong Pang,&nbsp;Yang Wang,&nbsp;Hongling Pan,&nbsp;Ailian Liu,&nbsp;Ruitian Bo,&nbsp;Fan Feng","doi":"10.1016/j.flatc.2026.101118","DOIUrl":"10.1016/j.flatc.2026.101118","url":null,"abstract":"<div><div>With the rapid development of modern electronic technologies, electromagnetic pollution has become an increasingly serious concern, creating an urgent demand for highly efficient electromagnetic interference (EMI) shielding materials. Herein, Ag/nitrogen-doped graphene (Ag/N-rGO) composites were fabricated through a two-step strategy involving urea-assisted nitrogen doping by thermal reduction and subsequent controlled electroless plating of Ag. The N-rGO framework contains abundant nitrogen configurations, including pyridinic N, pyrrolic N, and graphitic N. These configurations enhance the intrinsic conductive response and defect-induced polarization of graphene. Moreover, N-doping can provide active adsorption sites for Ag⁺, which contributes to the uniform anchoring of Ag nanoparticles on the N-rGO surface. Thus, by loading Ag nanoparticles, continuous conductive networks and abundant Ag/N-rGO heterointerfaces can be constructed. By optimizing the Ag loading, the ANG2 composite (N-rGO and AgNO₃ mass ratio of 1:2) exhibits the best EMI shielding performance, with an average total shielding effectiveness (SE_T) of 93.56 dB and an electrical conductivity of 157.81 S cm⁻¹. This outstanding performance is attributed to the synergistic contributions of conduction loss, polarization loss, and multiple reflection and scattering. This study provides insights into the rational design and fabrication of high-performance and tunable graphene-based EMI shielding materials.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"59 ","pages":"Article 101118"},"PeriodicalIF":5.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148952239","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":"Enhanced charge carrier separation in Sm-ZnO/Ag nanohybrids decorated on multiwalled carbon nanotubes for superior photocatalytic performance","authors":"Yassine Slimani,&nbsp;Sultan Akhtar,&nbsp;Abdelkrim Mekki","doi":"10.1016/j.flatc.2026.101117","DOIUrl":"10.1016/j.flatc.2026.101117","url":null,"abstract":"<div><div>Enhancing light harvesting and charge carrier separation is crucial for viable photocatalytic applications. This work addresses these fundamental challenges by developing a Sm-ZnO/Ag/CNTs nanocomposite. The structural, morphological, and optical characteristics of ZnO, Sm-ZnO/CNTs, ZnO/Ag/CNTs, and Sm-ZnO/Ag/CNTs were analyzed using microscopic and spectroscopic techniques. The UV-driven photocatalytic efficiency of the different nanocomposites was assessed against methyl orange (MO) dye. Sm-ZnO/Ag/CNTs nanocomposite showed superior performance, reaching an efficiency of 98.4% within 25 min, with a kinetic rate of ∼1.3 times superior to that of ZnO/Ag/CNTs, and approximately two and three times superior to those of Sm-ZnO/CNTs and pristine samples, respectively. Scavenging tests indicated that <span><math><mo>·</mo><msubsup><mi>O</mi><mn>2</mn><mo>−</mo></msubsup></math></span>, h⁺, and <strong>·</strong>OH are the primary species responsible for MO degradation under UV illumination. The superior performance of Sm-ZnO/Ag/CNTs nanocomposite is ascribed to the Sm effect, and the role of Ag and CNTs as synergistic electron traps, thereby promoting charge carriers' separation and transfer, which is further supported by the significant quenching of the photoluminescence emission intensity and a significant decrease in interfacial charge-transfer resistance as established by electrochemical impedance spectroscopy (EIS) measurements. Furthermore, the Sm-ZnO/Ag/CNTs nanocomposite exhibits high photocatalytic stability over five consecutive cycles. This investigation underlines the importance of Sm-ZnO/Ag/CNTs nanocomposite as an efficient and stable UV-driven photocatalyst for dye photodegradation.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"59 ","pages":"Article 101117"},"PeriodicalIF":5.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148952241","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":"Graphene Raman mapping of tissue-induced charge transfer in heterogeneous glioma specimens","authors":"Deisy Carvalho Fernandes Dixon,&nbsp;Mandana Behbahani,&nbsp;Bijentimala Keisham,&nbsp;Harsh Khilwani,&nbsp;Waleed Siddiqi,&nbsp;Vikas Berry,&nbsp;Ankit Mehta","doi":"10.1016/j.flatc.2026.101115","DOIUrl":"10.1016/j.flatc.2026.101115","url":null,"abstract":"<div><div>Accurate assessment of glioblastoma multiforme (GBM) tissue heterogeneity remains challenging because tumor core, infiltrative, margin, necrotic, and adjacent tissue regions can differ substantially in biochemical and electrochemical composition. Here, we evaluate monolayer graphene as a tissue-interfaced Raman transducer for detecting tissue-induced modulation of graphene phonons. Surgically resected glioma specimens were placed in direct contact with chemical vapor deposition (CVD)-grown monolayer graphene, and Raman mapping was used to quantify shifts in the graphene 2D band. Histopathology, performed blinded to Raman analysis, was used to assign tissue regions after Raman acquisition. For GBM specimens, tissue-contacting graphene showed measurable 2D-band shifts of approximately 2.3–5.9 cm⁻¹, corresponding to estimated n-type carrier densities of approximately −4.4 to −13.5 × 10¹² cm⁻². Histologically confirmed margin tissue and one oligodendroglioma specimen displayed larger 2D-band shifts than the GBM cohort average, indicating that the graphene Raman response is sensitive to tissue-dependent interfacial chemistry. These findings support the use of tissue-interfaced graphene as a label-free platform for probing local electrochemical heterogeneity in glioma specimens. Larger cohorts, rigorous strain/doping deconvolution, and blinded diagnostic validation will be required before diagnostic or intraoperative use can be established.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"59 ","pages":"Article 101115"},"PeriodicalIF":5.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148952240","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":"MOF-derived porous UiO-66-co₉S₈@NCNT nanocomposite for high-performance supercapattery systems and electrocatalytic hydrogen evolution","authors":"Sohail Mumtaz,&nbsp;Hasan B. Albargi","doi":"10.1016/j.flatc.2026.101086","DOIUrl":"10.1016/j.flatc.2026.101086","url":null,"abstract":"<div><div>A ternary UiO-66-Co₉S₈@NCNT nanocomposite was synthesized as a multifunctional electrode material for asymmetric supercapattery and hydrogen evolution reaction (HER) applications. The hybrid design integrates the structural framework of UiO-66, redox-active Co₉S₈, and conductive nitrogen-doped carbon nanotubes (NCNTs). UiO-66 provides accessible porous channels for electrolyte penetration, Co₉S₈ contributes Faradaic redox sites and HER-active centers, and NCNTs improve electrical conductivity and structural stability. Owing to these synergistic effects, the UiO-66-Co₉S₈@NCNT electrode delivered a specific capacity of 1797C g⁻¹ at 10 mV s⁻¹ and 2559C g⁻¹ at 2 A g⁻¹ in a three-electrode system. The assembled UiO-66-Co₉S₈@NCNT//AC asymmetric supercapattery device achieved a specific capacity of 415C g⁻¹, a maximum energy density of 71.2 Wh kg⁻¹ at a power density of 1723 W kg⁻¹, and 86.2% capacity retention after 5000 cycles. For alkaline HER, the composite required an overpotential of 260.45 mV to reach 10 mA cm⁻² and showed a Tafel slope of 77.11 mV dec⁻¹. The improved performance is attributed to the combined effects of porous ion-accessible pathways, electroactive sulfide sites, and a conductive NCNT network. These results indicate that UiO-66-Co₉S₈@NCNT is a promising multifunctional material for next-generation energy storage and hydrogen-production systems.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101086"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499903","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":"Engineered MoSe2-PEDOT nocomposites for eliminating peak overlap in the selective electrochemical detection of DA and UA","authors":"Shivam Kashyap,&nbsp;Kiran B. Manjappa,&nbsp;Anjana Sarkar","doi":"10.1016/j.flatc.2026.101085","DOIUrl":"10.1016/j.flatc.2026.101085","url":null,"abstract":"<div><div>The precise electrochemical monitoring of DA in the presence of ubiquitous interferents, such as UA, remains a formidable challenge due to the significant overlap in oxidation potentials. To address this, we have engineered a high-performance, selective electrochemical sensor based on a MoSe₂-decorated PEDOT nanosphere composite, synthesized via a synergistic one-pot hydrothermal and in-situ oxidative polymerization strategy. The resulting hierarchical “nanoflower-on-microsphere” architecture effectively suppresses the inherent tendency of MoSe₂ layers to restack, yielding an expansive specific surface area of 27 m²/g and a dramatically narrowed E_g of 0.12 eV. Electrochemical impedance spectroscopy (EIS) confirms a substantial reduction in charge-transfer resistance (R_CT), indicating that the hybrid interface serves as a high-speed conduit for electron transport. Utilizing differential pulse voltammetry (DPV), the sensor achieves a remarkable potential resolution, separating the oxidation peaks of DA and UA by approximately 260 mV, with a superior limit of detection (LOD) of 0.19 μM. Furthermore, steady-state amperometric (i-t) studies reveal exceptional kinetic responsiveness (&lt;5 s) and a reliable real-time detection limit of 0.31 μM, confirming the sensor's efficacy under dynamic flow conditions. The platform demonstrates robust stability and reproducibility under simulated physiological conditions, underscoring the potential of this MoSe₂-PEDOT hybrid for sophisticated neurochemical monitoring and advanced diagnostic applications.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101085"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499902","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":"YAO-encapsulated nitrogen-doped MWCNTs using for sensitive electrochemical determination of pyrogallol: a hazardous photographic developing agent in water bodies","authors":"Hemarani Annadurai,&nbsp;Pradeepa Selvaraj,&nbsp;Shen-Ming Chen,&nbsp;Mani Govindasamy,&nbsp;Zhen-Ping Liu","doi":"10.1016/j.flatc.2026.101087","DOIUrl":"10.1016/j.flatc.2026.101087","url":null,"abstract":"<div><div>Pyrogallol (PYL), a photographic developing agent, is a toxic pollutant released into water bodies through industrial effluents. In this study, a Y₃Al₅O₁₂-N@MWCNT (YAO/N@MW) nanocomposite was synthesized via hydrothermal method and ultrasonication for electrochemical detection of PYL. The optimized sensor exhibited a wide linear range (2.4–321.3 μM), ultra-low detection limit (6.02 nM), and high sensitivity (0.4372 μA μM⁻¹ cm⁻²). The oxidation followed a diffusion-controlled two-electron two-proton mechanism. The sensor showed excellent repeatability (1.319%), reproducibility (2.43%), and stability (91.5% retention after 28 days). Real sample analysis in pond, tap, and river water yielded excellent recoveries (99.41–100.68%) with low RSD (&lt;0.55%). The superior performance is attributed to the synergistic combination of YAO, conductive N-doped MWCNT, and the strong interfacial interactions between the components. This work presents a reliable electrochemical platform for monitoring PYL as a pollutant in aquatic environments.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101087"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499905","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":"A novel approach of CZTS thin-film solar cell with controlled molybdenum disulfide interfacial layer and indium tin oxide (MoS2–ITO) back contact","authors":"Kang Jian Xian,&nbsp;Norshafadzila Mohammad Naim,&nbsp;Iskandar Yahya,&nbsp;Abdul Rahman Mohmad,&nbsp;Jahariah Sampe,&nbsp;Masita Mohammad,&nbsp;Brian Yuliarto,&nbsp;Mohd Hafiz Dzarfan Othman,&nbsp;Md Akhtaruzzaman,&nbsp;Yap Wing Fen,&nbsp;Muhammad Rizwan,&nbsp;Huda Abdullah","doi":"10.1016/j.flatc.2026.101084","DOIUrl":"10.1016/j.flatc.2026.101084","url":null,"abstract":"<div><div>The urgent need for sustainable and renewable energy sources has spurred extensive research into photovoltaic technologies. Kesterite-based copper‑zinc‑tin-sulfide (CZTS) has gained significant attention among the various thin-film solar cell materials. This study proposes an innovative design for CZTS thin-film solar cells incorporating controlled molybdenum disulfide (MoS₂) interfacial layer at the indium tin oxide (ITO) back contact, as well as addressing the limitations of conventional materials and methods. In this work, Mo_{(1-<em>x</em>)}S_{2(<em>x</em>)} with varying sulfur (S₂) content (<em>x</em> = 0.40, 0.45, 0.50, 0.55 and 0.60 <em>w</em>/w%) were synthesized using sol-gel process and deposited on ITO substrates using a spin-coater. Structural, morphological, optical and electrochemical characterizations of MoS₂ thin films were conducted using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), UV–Vis spectroscopy, Raman spectroscopy, FTIR spectroscopy and electrochemical impedance spectroscopy (EIS). The optimal composition, Mo_(0.45)S_2(0.55), achieved a power conversion efficiency (PCE) of 1.512%. Despite the modest efficiency due to the ITO substrate, this work highlights the feasibility of MoS₂ as a controlled interfacial layer on top of ITO back contact material for CZTS solar cells, paving the way for more sustainable and economical photovoltaic solutions.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101084"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499907","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":"Laser-induced zero-, one-, and two-dimensional all carbon composites for ultra high-rate flexible supercapacitor electrodes","authors":"Hani Porat,&nbsp;Asmita Dutta,&nbsp;Binyamin VanderWalde,&nbsp;Refael Minnes,&nbsp;Netanel Shpigel,&nbsp;Zdenek Sofer,&nbsp;Arie Borenstein","doi":"10.1016/j.flatc.2026.101080","DOIUrl":"10.1016/j.flatc.2026.101080","url":null,"abstract":"<div><div>In this work, we report a flexible, all‑carbon ternary nanocomposite electrode for ultra-high-rate flexible supercapacitors, synthesized through a rapid, binder-free, two-stage CO₂ laser irradiation protocol that simultaneously reduces graphene oxide and graphitizes carbon nanodots on a flexible stainless-steel substrate. The composite integrates three carbon allotropes of complementary dimensionality 0D carbon nanodots (CNDs), 1D carbon nanotubes (CNTs), and 2D reduced graphene oxide (rGO) into a synergistic architecture in which the CNTs act as a conductive scaffold preventing rGO restacking and absorbing mechanical strain, while the CNDs bridge the interfacial gaps between the 1D and 2D phases and serve as a structural “softener” against bending stress. Through a systematic comparative study spanning five compositions and an exceptionally broad scan-rate window (20–10,000 mV s⁻¹), we show that the optimized rGO/CNT/CND10 electrode retains ∼40% of its low-rate capacitance at 10,000 mV s⁻¹ relative to only 4–6% for pristine rGO and ∼ 13% for the binary rGO/CNT at a scan rate at which most reported carbon-based flexible electrodes lose their capacitive signature entirely. The optimized electrode also exhibits a characteristic RC time constant of τ ≈ 11 ms (vs. ∼35 ms for pristine rGO), and maintains its capacitive response, minimum phase angle, and charge-transfer resistance under severe mechanical deformation. The electrode further retains ∼80% of its capacitance over 1000 charge–discharge cycles and preserves its voltametric response after 1000 bending cycles. The compositional control of the 0D/1D/2D carbon architecture thus provides a clear design route to flexible electrodes that retain capacitive function under both ultra-high scan rates and severe mechanical deformation.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101080"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499787","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":"Double-perovskite-supported S-doped reduced graphene oxide nanocomposite for ultrasensitive electrochemical detection of fenamiphos","authors":"Vinitha Mariyappan,&nbsp;Santhiyagu Sahayaraj Rex Shanlee,&nbsp;Ja-Hon Lin,&nbsp;Rasu Ramachandran,&nbsp;Sarawut Cheunkar,&nbsp;Yong-Song Chen","doi":"10.1016/j.flatc.2026.101077","DOIUrl":"10.1016/j.flatc.2026.101077","url":null,"abstract":"<div><div>The rising global population has increased demand for agriculture, making pesticides essential for crop protection. Organophosphorus (OP) compounds account for nearly a third of insecticide use, with fenamiphos (FMP) widely applied to control pests by inhibiting acetylcholinesterase. Despite its efficacy, FMP and its toxic byproducts pose serious environmental and health risks, emphasizing the essential for rapid, sensitive, and reliable detection. Electrochemical sensors, particularly when combined with nanomaterials, offer a promising solution because of their high sensitivity, stability, fast response, and low cost. Rare-earth double perovskites, such as Gd₂CoCrO₆ (GdCoCrO), offer tunable electronic properties, structural versatility, high electrocatalytic activity, and excellent stability. At the same time, sulfur-doped reduced graphene oxide (S-rGO) adds high conductivity, a huge surface area, more active sites, and effective charge transport. In this study, a novel GdCoCrO/S-rGO electrode material was prepared via calcination-assisted ultrasonication and characterized using various spectroscopic methods. Electrochemical analyses (EIS, CV, DPV) revealed less charge-transfer resistance, high peak currents, and minimal peak-to-peak separation, confirming its suitability for FMP detection. Density functional theory (DFT) calculations were employed to elucidate the optimized molecular configuration, frontier molecular orbitals, and potential electron-transfer active sites of FMP. The ordered GdCoCrO lattice enables efficient electron transfer and catalytic activity, while S-rGO nanosheets enhance conductivity and adsorption. Co<img>Cr interactions and Co<img>O<img>Cr linkages further strengthen electronic coupling, resulting in good sensitivity, selectivity, and rapid response. Under optimized conditions, the sensor achieved an ultra-low detection limit of 0.002 μM and a wide linear range of 0.1–830 μM. Its real-world applicability was confirmed through the successful detection of FMP in bell pepper, lemon, tomato, and soil, with recovery rates of 87.3–99.5%.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101077"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499908","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":"GO-PDA/HACC Nanofiltration membrane for wastewater treatment achieving dual optimization of water flux and dye separation performance","authors":"Yihan Wang,&nbsp;Yuxuan He,&nbsp;Zeshan Sun,&nbsp;Jingjun Wang,&nbsp;Hanlin Wan,&nbsp;Yibo Zhou,&nbsp;Yanxin Wang,&nbsp;Linjun Huang,&nbsp;Jianguo Tang","doi":"10.1016/j.flatc.2026.101083","DOIUrl":"10.1016/j.flatc.2026.101083","url":null,"abstract":"<div><div>The rapid growth of the global dye printing and dyeing industry has led to a dramatic increase in the discharge of dye wastewater, posing a serious threat to aquatic environments. Graphene oxide (GO) nanofiltration membranes have received a lot of attention because of their ability to separate substances efficiently, but it is often difficult to balance water flux and retention rate in practical applications. This study introduces the use of poly-dopamine (PDA) and hydroxypropyl trimethylammonium chloride chitosan (HACC) in the composite modification of GO membranes, resulting in the successful preparation of an optimized GO-PDA/HACC composite nanofiltration membrane. The synergistic effects of PDA and HACC on the membrane's interlayer structure, surface properties and separation performance were systematically investigated. The results show that the insertion of HACC effectively increases the spacing between the layers of GO, significantly enhancing the membrane's water flux (up to 86.4 L·m⁻²·h⁻¹·bar⁻¹). Concurrently, its positive charge groups strengthened the electrostatic repulsion towards anionic dyes, achieving high rejection towards several dyes, especially MB, CR and RB, while maintaining moderate rejection towards MO. Furthermore, the composite membrane exhibits excellent mechanical strength, long-term operational stability and acid-alkali resistance. This study provides novel insights into the design of high-performance nanofiltration membranes based on two-dimensional materials and has broad application prospects in the treatment of dye-contaminated wastewater.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"58 ","pages":"Article 101083"},"PeriodicalIF":5.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148499909","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}