IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-04-26 DOI: 10.1016/j.flatc.2026.101047

Widyan Muhammad Naufal, Lintang Permata Susilo, Sayekti Wahyuningsih, Edi Pramono, Isna Nurmilatul Azizah, Teguh Endah Saraswati

{"title":"Structural and electronic characteristics in Cu-Al layered double hydroxide/titanium dioxide (Cu-Al LDH/TiO2) composites","authors":"Widyan Muhammad Naufal, Lintang Permata Susilo, Sayekti Wahyuningsih, Edi Pramono, Isna Nurmilatul Azizah, Teguh Endah Saraswati","doi":"10.1016/j.flatc.2026.101047","DOIUrl":"10.1016/j.flatc.2026.101047","url":null,"abstract":"<div><div>The limited understanding of how synthesis parameters govern the structure–property relationships in layered-oxide hybrid materials remains a key challenge for rational materials design. In this study, a systematic approach is employed by independently controlling carbonate concentration (0–2 M Na<sub>2</sub>CO<sub>3</sub>), hydrothermal temperature (120–190 °C), and compositional ratio to elucidate their effects on Cu-Al layered double hydroxide (LDH), one-dimensional TiO<sub>2</sub> (1D TiO<sub>2</sub>), and their composites. The results show that an optimal Na<sub>2</sub>CO<sub>3</sub> concentration of 1 M enables the formation of a well-ordered brucite-like LDH structure. Increasing hydrothermal temperature to 190 °C enhances TiO<sub>2</sub> crystallinity and drives morphological evolution toward well-defined nanorods with lengths of ∼2.16 μm and widths of ∼129 nm. The resulting composites preserve the crystal structures of both components, indicating surface-level interactions without interlayer intercalation. Textural analysis reveals mesoporous characteristics, with the specific surface area increasing from 40.93 to 44.84 m<sup>2</sup>/g at a 4:1 ratio, followed by a decrease at higher TiO<sub>2</sub> content. Optical analysis reveals that the band gap can be systematically tuned from 3.12 to 3.51 eV depending on composition, accompanied by composition-dependent charge recombination behavior. Overall, this work highlights the importance of controlling synthesis conditions and compositional ratios to tailor the structural and optoelectronic properties of Cu-Al LDH/TiO<sub>2</sub> hybrid materials.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101047"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798045","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}

引用次数: 0

Functionalized graphitic carbon nitride nanosheets as next-generation fillers for fabrication of CO2 separation mixed matrix membranes 功能化石墨氮化碳纳米片作为新一代填料制备CO2分离混合基质膜

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-05-02 DOI: 10.1016/j.flatc.2026.101051

Xinyu Wang , Arash Mollahosseini , Fatemeh Seyedpour Taji , Jian Chen , Khalid Azyat , John Canlas , Paul Concepcion , Katherine Lin , Mohtada Sadrzadeh , Jae-Young Cho

{"title":"Functionalized graphitic carbon nitride nanosheets as next-generation fillers for fabrication of CO2 separation mixed matrix membranes","authors":"Xinyu Wang , Arash Mollahosseini , Fatemeh Seyedpour Taji , Jian Chen , Khalid Azyat , John Canlas , Paul Concepcion , Katherine Lin , Mohtada Sadrzadeh , Jae-Young Cho","doi":"10.1016/j.flatc.2026.101051","DOIUrl":"10.1016/j.flatc.2026.101051","url":null,"abstract":"<div><div>Fossil fuel usage remains a significant contributor to global greenhouse gas emissions, exacerbating climate change and environmental degradation. To address this challenge, scalable and cost-effective carbon capture technologies are urgently needed. Membrane-based gas separation offers a promising solution due to its low energy consumption and operational simplicity. Among membrane materials, poly(ether-<em>block</em>-amide) (Pebax 1657) has shown potential for CO<sub>2</sub> separation. However, its semi-crystalline nature and limited mechanical stability hinder widespread application. This study presents a novel approach to enhance the performance of Pebax-based thin-film membranes by incorporating 4,4′-diaminodiphenyl sulfone surface-functionalized graphitic carbon nitride (fGCN) nanosheets into the Pebax matrix. Supported by molecular dynamics simulations, material characterization of the developed membranes revealed that functionalization significantly enhances hydrogen bonding and van der Waals interactions between fGCN and the Pebax polymer matrix at the abundant nanofiller-polymer interface, allowing the formation of membranes with improved nanosheet dispersion and significantly lower crystallinity. At 2 wt% loading, a CO<sub>2</sub> permeability of 70.9 Barrer and a CO<sub>2</sub>/N<sub>2</sub> selectivity of 73.2 was achieved at 4 bar under a single gas experiment, representing an increase of 53.6% in permeability and 93.9% in selectivity compared to Pebax. Under mixed-gas conditions, membrane permeability and selectivity increase with pressure, indicating sorption-dominated transport effectively promoted by fGCN.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101051"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849531","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}

引用次数: 0

Green preparation of a novel cationic surfactant derived from starch carbon dots and the high surface activity as well as the antibiosis for E. coli and S. aureus 绿色淀粉碳点制备的新型阳离子表面活性剂及其对大肠杆菌和金黄色葡萄球菌的高表面活性

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-04-30 DOI: 10.1016/j.flatc.2026.101049

Jian Yang, Zhixiang Liu, Xiang Liu

{"title":"Green preparation of a novel cationic surfactant derived from starch carbon dots and the high surface activity as well as the antibiosis for E. coli and S. aureus","authors":"Jian Yang, Zhixiang Liu, Xiang Liu","doi":"10.1016/j.flatc.2026.101049","DOIUrl":"10.1016/j.flatc.2026.101049","url":null,"abstract":"<div><div>Renewable carbohydrates provided abundant resources for the preparation of carbon dots (CDs), which could serve as a starting material for synthesis of fine chemicals. In this work, soluble starch was first formulated into an aqueous dispersion and then converted into starch-derived CDs (designated as SCDs) via hydrothermal treatment. Subsequently, SCDs were facilely and efficiently modified with <em>n</em>-dodecylamine in an aqueous medium (the modified product was denoted as SCDs-C12). Experimental results demonstrated that a dilute solution of SCDs-C12 reduced the surface tension of water from 72.0 to 31.9 mN·m<sup>−1</sup> (25 °C), and its surface activity was comparable to that of some novel gemini surfactants. Additionally, the positively charged SCDs-C12 exhibited excellent performance in inhibiting the growth of <em>E. coli</em>, with a minimum inhibitory concentration of only 0.05 mg·mL<sup>−1</sup>, outperforming many previously reported CD-based materials. In summary, this work developed an environmentally friendly and green strategy for the fabrication of multifunctional cationic surfactants.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101049"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850286","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}

引用次数: 0

High-performance PVA/carbon fiber E-skin for AI-driven real-time tactile sensing 高性能PVA/碳纤维电子皮肤，用于人工智能驱动的实时触觉感应

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-04-30 DOI: 10.1016/j.flatc.2026.101048

Yong Yan , Yugang Chen , Mengyu Cao , Qifei Lv , Xiaoyan Li , Hang Zhou , Lingzhi Jin , Shasha Wang , Linghai Xie

{"title":"High-performance PVA/carbon fiber E-skin for AI-driven real-time tactile sensing","authors":"Yong Yan , Yugang Chen , Mengyu Cao , Qifei Lv , Xiaoyan Li , Hang Zhou , Lingzhi Jin , Shasha Wang , Linghai Xie","doi":"10.1016/j.flatc.2026.101048","DOIUrl":"10.1016/j.flatc.2026.101048","url":null,"abstract":"<div><div>Achieving simultaneous high sensitivity, broad detection range, and long-term durability in flexible pressure sensors remains a critical challenge for intelligent tactile sensing applications. Here, we present a high-performance electronic skin (<em>E</em>-skin) based on polyvinyl alcohol/carbon fiber (PVA/CF) nanofiber membranes fabricated via in-situ electrospinning onto screen-printed carbon electrodes on PET substrates. The optimized sensor exhibits a hierarchical multi-stage sensitivity profile of 870.56 kPa<sup>−1</sup> (0–1 kPa), 334.69 kPa<sup>−1</sup> (1–10 kPa), 56.81 kPa<sup>−1</sup> (10–220 kPa), and 14.22 kPa<sup>−1</sup> (220–420 kPa), an ultra-low detection limit of 2.3 Pa, ultrafast response and recovery times of 25 ms and 18 ms, and exceptional cyclic durability over 20,000 loading/unloading cycles at 140 kPa. Integration with a one-dimensional convolutional neural network (1D CNN) enables intelligent texture recognition, achieving 100% classification accuracy across eight diverse surface textures. Furthermore, a real-time recognition system incorporating signal buffering, preprocessing, and CNN inference is developed, demonstrating practical applicability for continuous tactile monitoring. The developed PVA/CF <em>E</em>-skin, combining superior sensing performance with AI-driven recognition capabilities, offers a cost-effective and scalable platform for advanced robotic tactile perception and human–machine interaction.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101048"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798040","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}

引用次数: 0

Synergistic effect of acrylic acid grafting and graphene oxide incorporation on Polyethersulfone ultrafiltration membranes for sewage wastewater treatment 聚醚砜超滤膜处理污水废水的丙烯酸接枝和氧化石墨烯的协同效应

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 DOI: 10.1016/j.flatc.2026.101054

Funeka Matebese, Meladi L. Motloutsi, Nonkululeko Malomane, Muthumuni Managa, Richard M. Moutloali

{"title":"Synergistic effect of acrylic acid grafting and graphene oxide incorporation on Polyethersulfone ultrafiltration membranes for sewage wastewater treatment","authors":"Funeka Matebese, Meladi L. Motloutsi, Nonkululeko Malomane, Muthumuni Managa, Richard M. Moutloali","doi":"10.1016/j.flatc.2026.101054","DOIUrl":"10.1016/j.flatc.2026.101054","url":null,"abstract":"<div><div>The discharge of untreated sewage wastewater (SWW) into natural water bodies poses serious environmental and public health risks due to the presence of pathogens, organic pollutants, and other contaminants. Effective and sustainable treatment technologies are therefore essential for high-quality treated effluent. In this study, an ultrafiltration (UF) membrane was developed to upgrade SWW to comply with South African National Standards (SANS:241) for drinking. Polyethersulfone (PES) membranes were modified through chemical grafting of acrylic acid (AA) and blending it with graphene oxide (GO) to form GO/PAA-g-PES membranes. The synthesized GO was characterized using FTIR, Raman, SEM and EDX while the membranes were characterized using SEM, AFM, water contact angle, TGA, zeta potential, Raman, and FTIR spectroscopy. Membrane modification resulted in significantly enhanced surface properties, namely, reduced surface roughness (from 69.6 nm to 8.87 nm), decreased water contact angle (WCA), hydrophilicity (from 72.5 to 31.0<sup>o</sup>), and improved surface charge (−12.3 to −83.3). These improvements translated into excellent filtration performance, with the optimal membrane (M4) exhibiting high pure water flux (122.8 Lm<sup>−2</sup> h<sup>−1</sup>), commendable flux recovery ratio (89.4%), and low irreversible fouling ratio (10.6%). The fouling resistant mechanisms was attributed to a combination of enhanced electrostatic repulsion, steric hindrance, and smoother membrane surfaces. Treated effluent met SANS:241 for drinking through combined size exclusion, adsorption, and electrostatic effects. Leaching studies confirmed membrane stability, with only negligible GO leaching in the first 7 days. The novelty lies in the integrated AA grafting and GO incorporation, which simultaneously enhances antifouling performance and effluent quality.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101054"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849527","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}

引用次数: 0

A comparative study of non-vdW Hematene synthesized via different methods for its potential application in NO2 gas sensing 不同合成方法合成非vdw Hematene的对比研究及其在NO2气敏中的潜在应用

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-05-04 DOI: 10.1016/j.flatc.2026.101056

Sumit Kumar Choudhary , Ujjwal Singh , Ajay Agarwal , Devendra Singh Negi

{"title":"A comparative study of non-vdW Hematene synthesized via different methods for its potential application in NO2 gas sensing","authors":"Sumit Kumar Choudhary , Ujjwal Singh , Ajay Agarwal , Devendra Singh Negi","doi":"10.1016/j.flatc.2026.101056","DOIUrl":"10.1016/j.flatc.2026.101056","url":null,"abstract":"<div><div>Non-van der Waals (non-vdW) two-dimensional (2D) materials like Hematene, derived from non-layered structures such as α-Fe₂O₃, offer unique advantages over traditional van der Waals (vdW) materials like graphene, transition metal dichalcogenides (TMDs), and phosphorene. Unlike vdW materials that exfoliate along weak interlayer forces, Hematene originates from a strong, non-layered crystal structure, enabling distinct physicochemical properties including greater structural stability, tunable electronic behavior, and enhanced catalytic activity. Recognizing that synthesis methods play a crucial role in shaping these properties, this study systematically compares Hematene synthesized via chemical, microwave, and ultrasonic exfoliation techniques. The results show that chemical exfoliation yields thinner nanosheets with increased surface reactivity, which significantly enhance nitrogen dioxide (NO₂) sensing performance. Notably, the chemically exfoliated Hematene demonstrated a high response of 81% and a rapid response time of 10 s at 20 ppm NO₂ at an optimized operating temperature of 150 °C, outperforming both other exfoliation methods and many conventional vdW-based 2D sensors. These findings highlight the importance of optimizing synthesis strategies to tailor the properties of non-vdW 2D materials. Overall, this work positions Hematene as a promising candidate for high-performance gas sensors and a compelling alternative to traditional vdW materials in next-generation sensing applications.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101056"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849530","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}

引用次数: 0

Tuning electronic structure of cobalt in cobalt-nitrogen-carbon catalyst via introducing oxygen group for efficient oxygen reduction to H2O2 通过引入氧基调整钴氮碳催化剂中钴的电子结构，使氧有效还原为H2O2

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 Epub Date: 2026-05-05 DOI: 10.1016/j.flatc.2026.101055

Haonan Cui , Jinyang Ma , Jiaqi Xiang , Xinyu Li , Ou Zhuo , Shanyong Chen

{"title":"Tuning electronic structure of cobalt in cobalt-nitrogen-carbon catalyst via introducing oxygen group for efficient oxygen reduction to H2O2","authors":"Haonan Cui , Jinyang Ma , Jiaqi Xiang , Xinyu Li , Ou Zhuo , Shanyong Chen","doi":"10.1016/j.flatc.2026.101055","DOIUrl":"10.1016/j.flatc.2026.101055","url":null,"abstract":"<div><div>Cobalt‑nitrogen‑carbon (Co-N-C) catalysts for the two-electron oxygen reduction reaction (2e<sup>−</sup> ORR) toward H<sub>2</sub>O<sub>2</sub> production typically suffer from insufficient selectivity. Herein, we introduce oxygen functional groups into Co-N-C via an oxidative treatment of the carbon substrate. This strategy effectively tunes the electronic structure of cobalt sites, suppressing the undesired 4e<sup>−</sup> ORR and favoring 2e<sup>−</sup> ORR. The optimized catalyst (Co-NOC) achieves an H<sub>2</sub>O<sub>2</sub> selectivity of 98% at 0.4 V vs. RHE, and maintains >90% selectivity over a wide potential range from 0.1 to 0.65 V vs. RHE. In a flow cell, it delivers a high H<sub>2</sub>O<sub>2</sub> production rate of 101.5 mg cm<sup>−2</sup> h<sup>−1</sup> at −200 mA cm<sup>−2</sup> with a Faradaic efficiency of 94%. This work provides a new strategy for modulating the electronic structure of single-atom catalysts and deepens the understanding of the structure-performance relationship in 2e<sup>−</sup> ORR.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101055"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849529","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}

引用次数: 0

Graphite-lattice curvature engineering of iron-nitrogen-carbon nanosheets for efficient oxygen reduction reaction in proton exchange membrane fuel cells 质子交换膜燃料电池中用于高效氧还原反应的铁氮碳纳米片石墨晶格曲率工程

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-05-01 DOI: 10.1016/j.flatc.2026.101050

Weiqi Liang, Lizhen Wen, Wanling Xiao, Cunhuai Yu, Ji Huang, Chengfu Tan, Pei Kang Shen, Zhi Qun Tian

{"title":"Graphite-lattice curvature engineering of iron-nitrogen-carbon nanosheets for efficient oxygen reduction reaction in proton exchange membrane fuel cells","authors":"Weiqi Liang, Lizhen Wen, Wanling Xiao, Cunhuai Yu, Ji Huang, Chengfu Tan, Pei Kang Shen, Zhi Qun Tian","doi":"10.1016/j.flatc.2026.101050","DOIUrl":"10.1016/j.flatc.2026.101050","url":null,"abstract":"<div><div>Unraveling the critical role of graphite lattice curvatures of carbon matrix in transition metal-nitrogen-carbon (M-N-C) for enhancing oxygen reduction reaction (ORR) is essential to construct non-precious metal-electrocatalyzed proton exchange membrane fuel cell (PEMFC). Herein, a salt-mediated strategy of tailoring Fe-N-C nanosheets with various graphite lattice curvatures was developed by pyrolyzing a newly designed Fe ion complexed amid-based polymer in a molten salt bath. Introducing the salt template in the synthesis facilitates the formation of 3D Fe-N-C nanosheets with highly exposed active sites and increases the graphite lattice curvatures of carbon matrix to optimize the electronic structure of Fe atom, thereby enhancing ORR performance. The Fe-N-C obtained with KCl featuring highly disordered and curved graphite lattices achieves a high acidic ORR performance with a half-wave potential of 0.805 V and only 20 mV decay after 30,000 cycles, which is much better than both the Fe-N-C prepared with NaCl with ordered and low curved lattices (0.783 V, 30 mV loss) and the Fe-N-C obtained without any salt having highly graphitic lattices (0.614 V, 123 mV loss). Meanwhile, it delivers a highest power density of 657 mW cm<sup>−2</sup> in PEMFC. Additionally, theoretical calculation reveals that compared with the planar graphite, the curved graphite lattice not only enhances the more electron accumulation on Fe, leading to a significant reduction of the overpotential of the rate-determining step of *OH, but also strengthens the Fe-N bond with a higher crystal orbital Hamilton population bonding value, thereby simultaneously promoting both the activity and durability of Fe-N-C for ORR. These results highlight new insights into boosting ORR of M-N-C through adjusting carbon matrix lattices.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"57 ","pages":"Article 101050"},"PeriodicalIF":6.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849528","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}

引用次数: 0

Bismuth chalcogenide-Zincite nanocomposite for the determination of a potent bioactive flavonoid 硫族铋-锌矿纳米复合物测定强效生物活性类黄酮

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI: 10.1016/j.flatc.2026.101007

Hemarani Annadurai , Tse-Wei Chen , Sivaprakash Sengodan , Elayappan Tamilalagan , Shen-Ming Chen

{"title":"Bismuth chalcogenide-Zincite nanocomposite for the determination of a potent bioactive flavonoid","authors":"Hemarani Annadurai , Tse-Wei Chen , Sivaprakash Sengodan , Elayappan Tamilalagan , Shen-Ming Chen","doi":"10.1016/j.flatc.2026.101007","DOIUrl":"10.1016/j.flatc.2026.101007","url":null,"abstract":"<div><div>A strong dietary flavonoid known for its anti-inflammatory, antioxidant, and newly discovered anti-cancer effects, quercetin (QR) has important effects on both plant defense systems and human health. For nutritional assessment, its quantitative detection is essential. For that we designed the Bi<sub>2</sub>S<sub>3</sub>@ZnO (BSZ) nanocomposite modified glassy carbon electrode (GCE) for this work and showed an excellent electrocatalytic activity towards QR oxidation. This is attributed to the synergistic effect between Bi<sub>2</sub>S<sub>3</sub> and ZnO, which promotes charge transfer and provides an abundant number of active sites. The sensor exhibited an exceptionally wide linear range from 0.1 μM to 3362 μM and an ultra-low detection limit of 0.63 nM. For the accurate determination of QR in various food samples, the practical applicability was successfully demonstrated with excellent recoveries. This study reveals the potential of semiconductor heterojunctions in forward-looking electrochemical sensing systems in addition to establishing an adequate instrument for QR analyzing.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"56 ","pages":"Article 101007"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185378","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}

引用次数: 0

2D layered Co3O4/crystalline graphene nanocomposite: In-situ synthesis, Auger analysis, elemental mapping and fabrication of a flexible dopamine sensor 二维层状Co3O4/晶体石墨烯纳米复合材料：原位合成、俄采分析、元素映射和柔性多巴胺传感器的制造

IF 6.2 3区材料科学

FlatChem Pub Date : 2026-03-01 Epub Date: 2026-02-17 DOI: 10.1016/j.flatc.2026.101010

Rimpa Mondal , Sk. Faruque Ahmed , Nillohit Mukherjee

{"title":"2D layered Co3O4/crystalline graphene nanocomposite: In-situ synthesis, Auger analysis, elemental mapping and fabrication of a flexible dopamine sensor","authors":"Rimpa Mondal , Sk. Faruque Ahmed , Nillohit Mukherjee","doi":"10.1016/j.flatc.2026.101010","DOIUrl":"10.1016/j.flatc.2026.101010","url":null,"abstract":"<div><div>An in-situ electrochemical deposition technique was utilized to develop Co<sub>3</sub>O<sub>4</sub>/crystalline graphene (Co<sub>3</sub>O<sub>4</sub>/cGr) nanocomposite 2D layered structure on indium oxide (ITO) coated polyethylene terephthalate (PET) flexible structure. Thorough characterizations of the deposited material have been carried out, interestingly that indicated the formation of crystalline graphene in the nanocomposite with an approximate layer count in the graphene stack within 18 and 20 and interlayer spacing of around 0.35 and 0.34 nm. The core-level ionization followed by non-radiative relaxation in Auger spectrum revealed the presence of mixed states of cobalt (i.e., Co(II) and Co(III)) in a spinel oxide structure, whereas, elemental mapping underscored well-distribution of cobalt, oxygen and carbon in the deposited film; that in turn refers to a highly active surface. On the other hand, electrochemical technique for the detection of neurotransmitters like dopamine can be a single-key solution to sensitive, selective and rapid determination of the analyte; where, such unique structural, compositional and surface features of the developed electrode material (Co<sub>3</sub>O<sub>4</sub>/cGr) could be well-contributing. Dopamine is a neurotransmitter that plays very important role in regulating human nervous actions and any imbalance in its abundance can cause severe issues like depression, hypertension, Parkinson's diseases and Schizophrenia, to name a few. This makes it very essential to detect the level of dopamine in human serum/plasma with best possible accuracy. So, in this work, the developed Co<sub>3</sub>O<sub>4</sub>/cGr nanocomposite was also explored for its possible application as an electrochemical dopamine sensor, and the results in terms of sensitivity, selectivity and reproducibility were quite encouraging.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"56 ","pages":"Article 101010"},"PeriodicalIF":6.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147399558","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}

引用次数: 0

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