FlatChem最新文献

{"title":"An integrated GMR biosensor with magnetite/reduced graphene oxide nanotag labels and machine learning for differential albumin-creatinine recognition","authors":"Zurnansyah,&nbsp;Iman Rahman,&nbsp;Putri Dwi Jayanti,&nbsp;Fazri Firdaus,&nbsp;Ni'’matil Mabarroh,&nbsp;Larrisa Jestha Mahardhika,&nbsp;Citra Dwi Lestari,&nbsp;Julia Angel,&nbsp;Tri Marji Atmono,&nbsp;Eko Sulistya,&nbsp;Edi Suharyadi","doi":"10.1016/j.flatc.2026.101146","DOIUrl":"10.1016/j.flatc.2026.101146","url":null,"abstract":"<div><div>Rapid and sensitive detection of biomolecules is crucial for supporting early disease diagnosis. This study developed a giant magnetoresistance (GMR)-based biosensor using a commercial chip. This sensor detection was integrated with machine learning (ML) analysis to detect bovine serum albumin (BSA) and creatinine. The magnetite/reduced graphene oxide (Fe₃O₄/rGO) nanocomposite as nanotag labels was synthesized via a green approach. The Fe₃O₄/rGO nanocomposite was functionalized with glutaraldehyde (GA) as a linker for biomolecule immobilization. Characterization results show that the magnetic labels exhibit superparamagnetic properties and generate a stray field sufficient for detection at an optimal bias field of 3.6 Oe. The biosensor demonstrates good linearity with an R² value of 0.98 for BSA and 0.95 for creatinine. The highest sensitivity was obtained for BSA detection at 23.02 mV/(mg/mL) with a limit of detection (LoD) of 0.8 mg/mL, while creatinine yielded a sensitivity of 10.84 mV/(mg/mL) and an LoD of 1.5 mg/mL. Repeated measurements show good repeatability, with relative standard deviation ranges of 0.4–3.4% for BSA and 0.5–9.2% for creatinine. Furthermore, the ML approach using principal component analysis and linear discriminant analysis at a biomolecule concentration of 1 mg/mL shows that feature extraction improved discrimination between BSA and creatinine. These findings highlight the potential of the Fe₃O₄/rGO-GA-based GMR biosensor as a simple and sensitive platform for biomolecule detection and differential recognition.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"60 ","pages":"Article 101146"},"PeriodicalIF":5.7,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149361826","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":"Hierarchical Mo-doped NiCoP/MXene heterostructures with tunable composition for enhanced bifunctional electrocatalysis for water and seawater electrolysis","authors":"Nurul Atiqah Izzati Md Ishak,&nbsp;Nur Qurratul Ainni Muhammad Esham,&nbsp;Suhaila Mohd Sauid,&nbsp;Noor Fitrah Abu Bakar,&nbsp;Saidur Rahman,&nbsp;Azran Mohd Zainoodin,&nbsp;Siti Kartom Kamarudin,&nbsp;Dong-Hyun Peck","doi":"10.1016/j.flatc.2026.101138","DOIUrl":"10.1016/j.flatc.2026.101138","url":null,"abstract":"<div><div>Seawater electrolysis offers a sustainable pathway for massive-scale hydrogen production but is challenged by sluggish oxygen evolution reaction (OER), simultaneously achieving high OER and hydrogen evolution reaction (HER), and competing chlorine oxidation in a chloride-rich environment. Herein, a composition-tunable Mo-doped NiCo phosphide integrated with MXene-coated nickel foam (Mo-NiCoP/MXene/NF) was developed with tunable Ni:Co ratios (1:1–1:0.4) for efficient water and seawater electrolysis. Modulating the Ni/Co ratio induced a distinct morphological evolution from nanosheet-assembled nanoflowers to cauliflower-like, rod-like, and aggregated structures, establishing a composition-morphology-activity relationship. The balanced Ni:Co composition in Mo-Ni₁Co₁P/MXene/NF favored OER activity, delivering overpotentials of 84, 339, and 438 mV in 1 M KOH and 97, 428, and 506 mV in alkaline seawater (1 M KOH Seawater) at 10, 100, and 500 mA cm⁻², respectively. In contrast, the Ni-rich Mo-Ni₁Co_0.5P/MXene/NF exhibited superior hydrogen evolution reaction (HER) activity, demonstrating the composition-dependent optimization of the anodic and cathodic reactions. The catalyst also exhibited good stability and improved chloride tolerance under the investigated seawater electrolysis conditions. Notably, the full-cell configuration of Mo-Ni₁Co₁P/MXene/NF || Mo-Ni₁Co_0.5P/MXene/NF electrocatalyst demonstrates low overall water/seawater splitting voltages of 1.52, 1.64, and 1.75 V at 10 mA cm⁻² in 1 M KOH, 1 M KOH + 0.5 M NaCl, and 1 M KOH seawater, respectively. The enhanced bifunctional performance originates from the composition-controlled morphology and synergistic coupling of the Mo-Ni-Co-P active phase with conductive MXene, which may promote active-site exposure and charge transfer. This work provides insight into the composition-engineering strategy for tailoring bifunctional MXene-based heterostructures towards efficient water and seawater electrolysis.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"60 ","pages":"Article 101138"},"PeriodicalIF":5.7,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149361827","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":"Highly oxidized graphene–silver nanocatalyst for one-pot detoxification of organophosphates and nitrophenols","authors":"Mayara G. Gonçalves,&nbsp;Gabriel C.B. Gomes,&nbsp;Sergio H. Domingues,&nbsp;Aldo G. Zarbin,&nbsp;Elisa S. Orth","doi":"10.1016/j.flatc.2026.101145","DOIUrl":"10.1016/j.flatc.2026.101145","url":null,"abstract":"<div><div>The neutralization of organophosphates and the reduction of nitrophenols remain significant challenges for chemical safety and wastewater treatment, requiring efficient and selective catalysts. Herein, a multifunctional catalyst based on highly oxidized graphene oxide (GO10d), functionalized with cysteamine via epoxide ring opening (GOSH10) and decorated with silver nanoparticles (Ag-rGOSH10), was developed to promote the sequential degradation of a paraoxon simulant (DEDNPP) through two consecutive steps: (i) nucleophilic cleavage of the organophosphate P<img>O bond and (ii) reduction of the nitrophenol generated as a byproduct. Prolonged oxidation increased the structural disorder and interlayer spacing of graphene oxide, indicating a higher degree of oxidation and a greater abundance of oxygen-containing functional groups. After functionalization, the incorporation of nitrogen and sulfur confirmed the successful anchoring of cysteamine. GOSH10 exhibited enhanced catalytic performance towards the nucleophilic degradation of DEDNPP compared with analogous materials based on conventionally oxidized graphene oxide. Decoration with silver nanoparticles preserved the nucleophilic activity while enabling efficient catalytic reduction of 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP). In a one-pot system, Ag-rGOSH10 enabled the sequential conversion of DEDNPP into 2,4-diaminophenol, demonstrating the complete detoxification of the paraoxon simulant. These findings show that increasing the oxidation degree of graphene oxide enhances cooperative effects in nucleophilic catalysis, while silver nanoparticle incorporation provides bifunctional catalytic activity, offering a promising strategy for the detoxification of hazardous organophosphates and nitrophenols.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"60 ","pages":"Article 101145"},"PeriodicalIF":5.7,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149361828","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":"Stacking-dependent magnetic ground-state switching in CrTe₂ bilayers: A first-principles and interpretable machine-learning study of 1H-CrX₂ (X = S, se, Te)","authors":"Abdullah F. Al Naim,&nbsp;Dhafer O Alshahrani,&nbsp;Ali Mujtaba,&nbsp;Qurat Ul Ain,&nbsp;Babar Ali","doi":"10.1016/j.flatc.2026.101143","DOIUrl":"10.1016/j.flatc.2026.101143","url":null,"abstract":"<div><div>Two-dimensional chromium dichalcogenides provide a platform for tuning electronic and magnetic properties through chalcogen composition and interlayer configuration. Here, 1H-CrX₂ (X = S, Se, Te) monolayers and 0°/30° CrTe₂ bilayers were investigated using density functional theory (DFT), including the Perdew–Burke–Ernzerhof (PBE) and Heyd–Scuseria–Ernzerhof (HSE06) functionals, spin–orbit coupling (SOC), and complementary interpretable machine learning (ML). At the PBE + SOC level, the calculated band gaps are 0.889, 0.698, and approximately 0.006 eV for CrS₂, CrSe₂, and CrTe₂, respectively. HSE06 + SOC further confirms the near-gapless character of monolayer CrTe₂. Explicit collinear spin-polarized PBE + D3 total-energy calculations reveal configuration-dependent magnetic ground-state switching in CrTe₂ bilayers: the 0° configuration favors ferromagnetic (FM) ordering, whereas the 30° configuration favors compensated antiferromagnetic (AFM) ordering. The two configurations also exhibit sharply contrasting electronic structures: the 0° FM bilayer is near-metallic along the band path, while the more strongly bound 30° AFM bilayer develops a small indirect gap of approximately 0.09 eV. The areal binding energies are −30.1 and − 50.3 meV Å⁻², respectively, indicating significantly stronger interlayer cohesion in the 30° configuration. A DFT-enriched XGBoost model trained on 8.86 × 10³ C2DB monolayers captures the overall scalar-PBE band-gap trend but does not describe SOC-driven gap closure or bilayer magnetic ordering. The thermal stability of the investigated systems was verified by ab initio molecular dynamics up to 500 K, and phonon calculations confirm the dynamical stability of the CrS₂ and CrSe₂ monolayers. Overall, chalcogen chemistry and interlayer configuration provide complementary routes for controlling the electronic and magnetic properties of CrX₂, with bilayer twist emerging as a switch between ferromagnetic metallic and antiferromagnetic gapped states in CrTe₂.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"60 ","pages":"Article 101143"},"PeriodicalIF":5.7,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149361838","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":"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}