FlatChem最新文献

{"title":"Scalable fabrication of silicon/activated carbon composite anodes with superior capacity for Lithium-ion batteries","authors":"Thi Nam Pham ,&nbsp;Thi Ngoc Thao Le ,&nbsp;Ngoc Uyen Dao ,&nbsp;Thi Kieu Anh Vo ,&nbsp;Hoang Anh Nguyen ,&nbsp;Thi Thom Nguyen ,&nbsp;Thi Thu Trang Nguyen ,&nbsp;Thai Hoang Nguyen ,&nbsp;Viet Hai Le ,&nbsp;Le Thanh Nguyen Huynh ,&nbsp;Dai Lam Tran ,&nbsp;Thi Mai Thanh Dinh","doi":"10.1016/j.flatc.2025.100907","DOIUrl":"10.1016/j.flatc.2025.100907","url":null,"abstract":"<div><div>Silicon is one of the most attractive anode materials for lithium-ion batteries due to its exceptionally high theoretical capacity (∼3579 mAh g⁻¹). However, its practical implementation is severely restricted by extensive volume changes during lithiation/delithiation, leading to mechanical degradation and rapid capacity fading. To overcome these limitations, silicon/activated carbon (Si/AC) composites containing 10, 20, and 30 wt% Si were synthesized via a scalable ball milling approach. Among them, the Si10/AC composite exhibited optimal structural integrity, high specific surface area, and favorable ion diffusion properties. It delivered a high initial capacity of 1634 mAh g⁻¹ and retained 935 mAh g⁻¹ after 400 cycles at C/10, with a stable Coulombic efficiency of ∼95 %. These results underscore the effectiveness of the carbon matrix in mitigating silicon's volume expansion, enhancing conductivity, and maintaining electrode stability. The Si10/AC architecture offers a promising pathway for the development of high-performance, durable silicon-based anodes for next-generation lithium-ion batteries.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"53 ","pages":"Article 100907"},"PeriodicalIF":5.9,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597006","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":"The effects of flattening microstructure of disordered hard carbon derived from waste polyethylene terephthalate on ion storage behaviors in sodium-ion batteries","authors":"Hyunju Park,&nbsp;JeongA Kim,&nbsp;Jungpil Kim,&nbsp;Daeup Kim,&nbsp;Junghoon Yang","doi":"10.1016/j.flatc.2025.100905","DOIUrl":"10.1016/j.flatc.2025.100905","url":null,"abstract":"<div><div>This study investigates the synthesis and electrochemical performance of hard carbon anodes derived from polyethylene terephthalate (PET) waste for sodium-ion batteries (SIBs). Given the growing interest in SIBs as cost-effective and sustainable alternatives to lithium-ion batteries (LIBs), the development of suitable anode materials is critical. Graphite, the conventional anode in LIBs, exhibits poor sodium ion storage capability due to thermodynamic instability of Na-graphite intercalation compounds (GICs), necessitating alternative carbon anode materials for SIBs. Hard carbon, with its disordered structure, tunable interlayer spacing, offers a promising solution by mixed sodium storage mechanisms—including surface adsorption, intercalation, and pore filling. In this work, waste PET was carbonized at different temperature conditions (1000 °C for p-LHC, 1250 °C for p-MHC, and 1500 °C for p-HHC) under inert atmosphere to produce upcycled hard carbons with varying structural properties. Characterization using X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM) revealed progressive crystallization and microstructural evolution with increasing temperature. Electrochemical evaluations reveal that the intermediate-temperature carbonized hard carbon achieved the highest reversible capacity of 269.2 mAh g⁻¹ and demonstrated excellent cycling stability by retaining 96 % of its capacity (260 mAh g⁻¹) after 100 cycles. Notably, p-MHC maintained a high capacity of approximately 200 mAh g⁻¹ even at current density of 1000 mA g⁻¹, indicating remarkable rate capability. This enhanced performance can be attributed to its transitional microstructure, which facilitates both sloping-type (surface-driven) and plateau-type (intercalation-driven) sodium storage mechanisms. Our findings highlight the potential of converting waste PET into high-value added hard carbon anodes by regulating its microstructure, offering the dual benefits of addressing environmental issues and advancing sustainable energy storage technologies.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100905"},"PeriodicalIF":5.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517491","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 sensitive voltammetric detection of 4-nitrobenzoic acid using Zn2SnO4/porous graphene oxide nanosheets composite electrode","authors":"Kavitha Balasubramanian ,&nbsp;Saranvignesh Alagarsamy ,&nbsp;Michael Ruby Raj ,&nbsp;Shen Ming Chen ,&nbsp;Ramanjaneyulu Seemaladinne ,&nbsp;J. Gandhiraj ,&nbsp;Srikanth Cheemalapati ,&nbsp;Chelladurai Karuppiah ,&nbsp;Chun-Chen Yang ,&nbsp;Sayee Kannan Ramaraj","doi":"10.1016/j.flatc.2025.100906","DOIUrl":"10.1016/j.flatc.2025.100906","url":null,"abstract":"<div><div>Detecting 4-nitrobenzoic acid (4-NBA) is crucial due to its prevalence as an industrial pollutant and associated health hazards. In this study, we synthesized a novel stannate-based nanocomposite, Zn₂SnO₄/porous graphene oxide nanosheets (Zn₂SnO₄/PGO), through a facile hydrothermal method followed by ultrasonication-assisted dispersion. For the first time, this Zn₂SnO₄/PGO nanocomposite was employed as an electrode modifier for 4-NBA detection. The structural and physicochemical properties of the synthesized Zn₂SnO₄/PGO nanocomposite were systematically characterized using various spectroscopic techniques. Electrochemical studies, including electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV), demonstrated that the Zn₂SnO₄/PGO-modified electrode has a significantly enhanced electroactive surface area and efficient electron transport, resulting in superior electrocatalytic activity for 4-NBA detection. From the DPV quantification experiments, the limit of detection was calculated as 3.3 nM within the linear detection range of 0.1–231 μM. The sensor demonstrated high accuracy, repeatability, reproducibility, and long-term stability. Anti-interference studies indicated no significant cathodic potential shifts in the presence of common interfering species. Finally, the Zn₂SnO₄/PGO-modified sensor was successfully applied to detect 4-NBA in real samples, including human urine, river water, and wastewater, showing excellent recovery rates. These findings confirm the sensor's potential for reliable and sensitive electrochemical monitoring of 4-NBA in different matrices, underscoring the importance of environmental safety and public health protections.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100906"},"PeriodicalIF":5.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517492","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":"Anchoring performance of metallic penta-PBN monolayer in lithium–sulfur (Li–S) batteries","authors":"Nicolas F. Martins ,&nbsp;Warda Elaggoune ,&nbsp;José. A.S. Laranjeira ,&nbsp;Yusuf Zuntu Abdullahi ,&nbsp;Julio R. Sambrano","doi":"10.1016/j.flatc.2025.100895","DOIUrl":"10.1016/j.flatc.2025.100895","url":null,"abstract":"<div><div>Mitigating the shuttle effect induced by lithium polysulfides (LiPSs) is essential for improving the performance of lithium–sulfur (Li–S) batteries. In this study, we employ density functional theory (DFT) to investigate the suitability of a metallic pentagonal PBN (penta-PBN) monolayer as an anchoring material for S<span><math><msub><mrow></mrow><mrow><mn>8</mn></mrow></msub></math></span> and Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span> species (x = 1, 2, 4, 6, 8). The penta-PBN surface exhibits strong adsorption toward LiPSs, with binding energies ranging from −0.74 to −5.21 eV, and notable charge transfer, particularly for Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>8</mn></mrow></msub></math></span> (−0.821e) and Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> (−0.883e), indicative of chemisorption. Density of states (DOS) analysis confirms that penta-PBN retains its metallic character upon adsorption, ensuring continuous electron transport. Furthermore, nudged elastic band (NEB) calculations reveal low diffusion barriers for Li and Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S, highlighting excellent ionic mobility. These results underscore the promise of penta-PBN as a robust anchoring platform for next-generation Li–S battery cathodes.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100895"},"PeriodicalIF":5.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481634","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":"Unravelling the role of heteroatom modifications in Bismuthene towards OER performance","authors":"P. Sujita,&nbsp;Sethumathavan Vadivel","doi":"10.1016/j.flatc.2025.100904","DOIUrl":"10.1016/j.flatc.2025.100904","url":null,"abstract":"<div><div>Bismuthene, an emergent two-dimensional material, exhibits potential for energy applications but requires enhancement in electrocatalytic efficiency. This study investigates the impact of individual heteroatom doping- boron (B), nitrogen (N), oxygen (O), and sulfur (<em>S</em>)-on bismuthene to optimize its catalytic performance. Structural and compositional modifications were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Electrochemical studies, including cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS), reveal that nitrogen-doped bismuthene (Biene-N) demonstrates the lowest overpotential of 350 mV at 50 mA cm⁻² with a Tafel slope of 78 mV dec⁻¹ for the oxygen evolution reaction (OER). Stability tests confirm 24-h durability with the decrement of overpotential of 30 mV, attributed to self-reconstruction. The findings highlight the role of heteroatom doping in modulating electronic structure and surface activity, providing a new pathway for efficient, cost-effective metallenes-based electrocatalysts in sustainable energy technologies. This study provides insights into the role of targeted heteroatom doping in optimizing bismuthene for sustainable energy technologies, offering a pathway for developing efficient and cost-effective energy solutions.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100904"},"PeriodicalIF":5.9,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481633","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":"Unlocking the potential of Mo2TiC2 MXene: synthesis, properties, and applications in energy and beyond","authors":"T. Kavinkumar ,&nbsp;Sivasankaran Ayyaru ,&nbsp;Jagadeesh Kumar Alagarasan ,&nbsp;Sandoval-Hevia Gabriela ,&nbsp;Natarajan Chidhambaram ,&nbsp;N. Dineshbabu ,&nbsp;Sathishkumar Kamaraj ,&nbsp;Shanmuga Sundar Dhanabalan ,&nbsp;Mir Waqas Alam ,&nbsp;Arun Thirumurugan","doi":"10.1016/j.flatc.2025.100903","DOIUrl":"10.1016/j.flatc.2025.100903","url":null,"abstract":"<div><div>Mo₂TiC₂ MXene, a member of the expanding family of two-dimensional transition metal carbides, has emerged as a highly promising material owing to its unique layered structure, tunable surface chemistry, and excellent physicochemical properties. This review presents a detailed and focused analysis of Mo₂TiC₂ MXene, with an emphasis on its synthesis strategies including conventional hydrofluoric acid-based and environmentally benign fluoride-free methods. Surface modifications and chemical functionalization approaches are discussed to highlight how these treatments enhance stability, dispersibility, and application-specific performance. Structural, mechanical, and thermoelectric characteristics are critically evaluated to establish a foundation for understanding the material's behavior under diverse conditions. The review further explores a wide range of applications, including its use in energy storage (supercapacitors, lithium-ion and sodium-ion batteries), energy conversion (photocatalytic hydrogen evolution and electrocatalysis for HER/ORR), and environmental remediation. Emerging applications in hydrogen storage, biomass conversion, sensing technologies, nonlinear photonics, and photocatalysis are also addressed. Recent theoretical insights based on DFT calculations are incorporated to provide atomic-level understanding of electronic structure, surface reactivity, and interaction mechanisms. Despite the promising advancements, challenges such as large-scale synthesis, structural stability, and limited exploration in biomedical and photothermal applications remain. Future research directions are outlined, including hybridization with other functional materials, advanced computational screening, and scalable green synthesis methods. By consolidating current progress and identifying critical knowledge gaps, this review serves as a timely and comprehensive resource, aimed at accelerating research on Mo₂TiC₂ MXene for next-generation applications across energy, environment, and emerging technologies.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100903"},"PeriodicalIF":5.9,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472108","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":"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":"Investigating the role of Pd-coated TiO2@g-C3N4 heterojunctions in enhancing photocatalytic NO removal","authors":"Minh-Thuan Pham ,&nbsp;Duyen P.H. Tran ,&nbsp;Van Viet Pham ,&nbsp;Phuong Hoang Nguyen ,&nbsp;Minh-Ky Nguyen ,&nbsp;Sakthivel Kogularasu ,&nbsp;Le Thanh Nguyen Huynh ,&nbsp;Yen-Yi Lee ,&nbsp;Guo-Ping Chang-Chien ,&nbsp;Tien-Chin Chang ,&nbsp;Ya-Fen Wang ,&nbsp;Sheng-Jie You","doi":"10.1016/j.flatc.2025.100898","DOIUrl":"10.1016/j.flatc.2025.100898","url":null,"abstract":"<div><div>Heterostructure photocatalysts have emerged as a promising solution for efficiently removing air pollutants, leveraging their synergistic properties for enhanced photocatalytic activity. In this study, Pd/TiO₂@g-C₃N₄ heterojunction composites were synthesized via a wet impregnation method, integrating the surface plasmon resonance (SPR) effect of palladium nanoparticles (Pd NPs) to enhance visible-light photocatalysis. The Pd NPs, with an average particle size of 7.2 nm, were uniformly distributed on the TiO₂@g-C₃N₄ surface with minimal aggregation, ensuring optimal interaction within the composite. Under solar and visible-light irradiation, the 5 % Pd/TiO₂@g-C₃N₄ composites exhibited outstanding air pollutant oxidation efficiencies of 77.1 % and 67.2 %, respectively, while maintaining high stability over five recycling cycles with minimal formation of toxic byproducts. The enhanced performance was attributed to improved light absorption, narrowed bandgap, and efficient S-scheme charge transfer, with Pd NPs functioning as electron sinks to promote the generation of reactive oxygen species via the reduction process while suppressing electron–hole recombination. Mechanistic studies, supported by band structure analysis, trapping experiments, and EPR spectroscopy, revealed that photogenerated holes in TiO₂ dominate the oxidation process, while Pd facilitates charge separation and redox reactions. These results underscore the potential of SPR-enhanced heterojunction systems as robust and sustainable photocatalysts for environmental remediation.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"52 ","pages":"Article 100898"},"PeriodicalIF":5.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489942","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}