Synthetic Metals最新文献_第9页

Comparison of cobalt phthalocyanine (CoPc) and reduced graphene oxide functionalized CoPc hybrid as sensing element for heavy metal ions in water 酞菁钴（CoPc）与还原氧化石墨烯官能化CoPc杂化物作为水中重金属离子传感元件的比较

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-05-03 DOI: 10.1016/j.synthmet.2025.117877

Erol Kam , Ahmet Altındal , Murat Sarı

{"title":"Comparison of cobalt phthalocyanine (CoPc) and reduced graphene oxide functionalized CoPc hybrid as sensing element for heavy metal ions in water","authors":"Erol Kam , Ahmet Altındal , Murat Sarı","doi":"10.1016/j.synthmet.2025.117877","DOIUrl":"10.1016/j.synthmet.2025.117877","url":null,"abstract":"<div><div>In this study, heavy metal ion (HMI) sensing properties of 4-pyridinyl-oxadiazole tetrasubstituted cobalt phthalocyanine (CoPc) and reduced graphene oxide (rGO) modified CoPc hybrid in water samples were comparatively investigated by quartz crystal microbalance (QCM) technique. The adsorption equilibrium isotherms of four main HMIs (As<sup>3 +</sup>, Hg<sup>2+</sup>, Pb<sup>2+</sup>, and Cd<sup>2+</sup>) from aqueous solutions onto CoPc and rGO/CoPc were also studied and modelled. Results showed that the presence of carboxyl groups and strong Lewis base nature of rGO improves the HMI sensitivity of rGO/CoPc nanocomposite. A sensitivity value of 3.9 × 10<sup>4</sup> Hz/mg l <sup>−1</sup> was obtained for As<sup>3+</sup> ions with rGO/CoPc while it was 6.7 × 10<sup>2</sup> Hz/mg l<sup>−1</sup> with CoPc. A set of long-term stability and reusability tests was performed on both CoPc and CoPc/rGO hybrid based sensors for Pb<sup>2+</sup> ions. CoPc/rGO hybrid exhibits excellent long-term stability after ∼ 500 h, maintaining about 95 % of its initial sensitivity, compared to 80 % for the CoPc-based sensor. The adsorption equilibrium isotherms of the four HMIs from aqueous solutions onto CoPc and rGO/CoPc were modelled using five different (Langmuir, Freundlich, Elovich, Temkin, and Jovanovic) two parameter adsorption isotherm models. Regression analysis showed that the functionalization of the CoPc with rGO has a strong effect on the HMIs adsorption isotherm.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117877"},"PeriodicalIF":4.0,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912274","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

Phenylenediamine and 4,4’-methylenedianiline functionalized rGO as high-performance materials for improving pseudocapacitance performance and cyclic stability of conductive polymer 苯二胺和4,4′-亚甲基苯胺功能化氧化石墨烯作为提高导电聚合物赝电容性能和循环稳定性的高性能材料

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-30 DOI: 10.1016/j.synthmet.2025.117880

Peyman Khodaei kahriz , Ali Akbar Heidari , Ali Ehsani , Hossein Mahdavi , Khalil Farhadi , Mohammad Bigdeloo

{"title":"Phenylenediamine and 4,4’-methylenedianiline functionalized rGO as high-performance materials for improving pseudocapacitance performance and cyclic stability of conductive polymer","authors":"Peyman Khodaei kahriz , Ali Akbar Heidari , Ali Ehsani , Hossein Mahdavi , Khalil Farhadi , Mohammad Bigdeloo","doi":"10.1016/j.synthmet.2025.117880","DOIUrl":"10.1016/j.synthmet.2025.117880","url":null,"abstract":"<div><div>Here, improved Hummer’s approach was utilized for the formation of graphene oxide (GO) from graphite. Then, using 4,4’-methylenedianiline (MDA) was utilized as a reducing agent for the fabrication of reduced graphene oxide (rGO) hydrogel from the as-prepared GO. In the next step, using the electro-polymerization technique, p-Phenylenediamine (pPD), playing the role of spacer, was grafted on the prepared rGO, conducted through interfacial polymerization in HCl (rGO-P<em>p</em>PD-HCl) and mixing polymerization in CHCl<sub>3</sub> (rGO-P<em>p</em>PD-CHCl<sub>3</sub>). Finally, Poly ortho aminophenol (POAP) as a p-type conductive polymer was synthesized on the channels of the as-fabricated nanocompsites. The prepared nanocomposite architecture possessed significant surface area and great pore volume, by which a synergistic effect can be obtained, leading to a superior overall performance. It was found that the specific capacitance of the fabricated spherical composite electrode with optimum results was 985 F/g at 1.0 A/g current density, and the retention rate of the initial capacity was 90 % after 3000 cycles in acidic solution, demonstrating its excellent cycle stability.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117880"},"PeriodicalIF":4.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899374","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

Design of new first and fifth generation OLED emitters by doping 12,12-dimethyl-7-phenyl-7,12-dihydrobenzo[a]acridine-3-carbonitrile (BACN): DFT study 用12,12-二甲基-7-苯基-7,12-二氢苯并[a]吖啶-3-碳腈（BACN）掺杂设计新的第一代和第五代OLED发射体：DFT研究

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-30 DOI: 10.1016/j.synthmet.2025.117879

Pierre Ferdinand Bissi Nyandou , Patrick Noudem , Côme Damien Désiré Mveme , David Fouejio , Serge Sylvain Zekeng

{"title":"Design of new first and fifth generation OLED emitters by doping 12,12-dimethyl-7-phenyl-7,12-dihydrobenzo[a]acridine-3-carbonitrile (BACN): DFT study","authors":"Pierre Ferdinand Bissi Nyandou , Patrick Noudem , Côme Damien Désiré Mveme , David Fouejio , Serge Sylvain Zekeng","doi":"10.1016/j.synthmet.2025.117879","DOIUrl":"10.1016/j.synthmet.2025.117879","url":null,"abstract":"<div><div>In this paper, DFT and TD-DFT were used to investigate the impact of potassium doping on the electronic, NLO, and photophysical properties of BACN. The results indicate that doping with one (sample M1) or two (sample M2) potassium atoms enhances the electronic and optical properties of pure BACN (sample M0), reducing the bandgap from 3.70 eV for M0 to 2.97 eV for M1 and 2.34 eV for M2. This reduction increases electronic conductivity and intramolecular charge transfer. The first order hyperpolarizability values of the doped compounds are approximately 8 times higher for M1 and 9 times higher for M2 compared to M0, suggesting that the doped compounds are excellent candidates for nonlinear optical applications compared to the undoped compound M0. Regarding photophysical properties, M1 exhibits an inverted singlet-triplet (IST) state characterized by <span><math><mrow><mo>∆</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>ST</mi></mrow></msub><mo>=</mo><mo>−</mo><mn>0.66</mn><mspace></mspace><mi>eV</mi></mrow></math></span> between S<sub>1</sub> and T<sub>1</sub>, with a low RISC process. The UV-Vis spectrum of M1 reveals a double excitation with maximum bands in the near UV range, while its emission spectrum shows a peak at 415.44 nm with a CIE chromatic coordinate of (0.20, 0.18), indicating that M1 is a promising candidate for fifth-generation blues OLEDs. In contrast, the absorption and emission spectra of M2 show maxima in the visible spectrum at 413.22 nm and 400.61 nm, respectively. Thus, M2 can be used as an emitter for first-generation OLEDs used as antibacterial light sources, as well as an absorber for organic solar cells (OSCs).</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117879"},"PeriodicalIF":4.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899264","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

Efficient visible-light-driven H2O2 production activity of covalently modified zinc phthalocyanine/g-C3N4 heterostructure 共价修饰的酞菁锌/g-C3N4异质结构的高效可见光产H2O2活性

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-30 DOI: 10.1016/j.synthmet.2025.117878

Sibel Eken Korkut

{"title":"Efficient visible-light-driven H2O2 production activity of covalently modified zinc phthalocyanine/g-C3N4 heterostructure","authors":"Sibel Eken Korkut","doi":"10.1016/j.synthmet.2025.117878","DOIUrl":"10.1016/j.synthmet.2025.117878","url":null,"abstract":"<div><div>Developing efficient heterojunction photocatalysts holds a great promise for advancing solar-to-chemical energy conversion. In this study, tetra-4-carboxyethylenephenoxy-substituted Zinc (II) phthalocyanine (ZnTcPc) was covalently linked to the amine-functionalized graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) to create an efficient photocatalyst. The optimized ZnTcPc/g-C<sub>3</sub>N<sub>4</sub> composite demonstrated improved photocatalytic activity relative to that of pure g-C<sub>3</sub>N<sub>4</sub> and ZnTcPc in the generation of H<sub>2</sub>O<sub>2</sub> under 150 W metal halide lamp at ambient temperature. The covalent integration of ZnTcPc into the g-C<sub>3</sub>N<sub>4</sub> framework tailored its electronic structure efficiently and highlighted the potential of the ZnTcPc/g-C<sub>3</sub>N<sub>4</sub> composite as a visible-light responsive photocatalyst. FT-IR spectroscopy revealed the establishment of novel chemical linkages between ZnTcPc and g-C<sub>3</sub>N<sub>4</sub>, indicating strong covalent interactions. SEM and TEM analyses provided insight into the morphological transformation, showing a more uniform surface texture and enhanced interface contact between the two materials, facilitating better charge transfer. XRD patterns indicated alterations to the crystalline structure, confirming the successful incorporation of ZnTcPc into the g-C<sub>3</sub>N<sub>4</sub> lattice. Additionally, XPS analysis verified the electronic coupling between g-C<sub>3</sub>N<sub>4</sub> and ZnTcPc, with shifts in binding energies suggesting strong electronic interaction. These findings underscore the nanocomposite's improved photocatalytic activity and responsiveness to visible light. It achieved the highest H<sub>2</sub>O<sub>2</sub> production rate of 27.17 mg/L within 90 min, surpassing the rates of pure g-C<sub>3</sub>N<sub>4</sub> and ZnTcPc. This synergistic photocatalytic process provides valuable insights into advancing energy conversion technologies.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117878"},"PeriodicalIF":4.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899375","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

Facile design of NiO-rGO/Mo2Ti2C3 ternary composites for electrochemical detection of dopamine 用于多巴胺电化学检测的NiO-rGO/Mo2Ti2C3三元复合材料的简易设计

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-14 DOI: 10.1016/j.synthmet.2025.117876

Keerthana Sahadevan , Mari Vinoba , Shanmugam Revathi , Soon Kwan Jeong , Margandan Bhagiyalakshmi

{"title":"Facile design of NiO-rGO/Mo2Ti2C3 ternary composites for electrochemical detection of dopamine","authors":"Keerthana Sahadevan , Mari Vinoba , Shanmugam Revathi , Soon Kwan Jeong , Margandan Bhagiyalakshmi","doi":"10.1016/j.synthmet.2025.117876","DOIUrl":"10.1016/j.synthmet.2025.117876","url":null,"abstract":"<div><div>In this study, a ternary NiO-rGO/Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub> MXene hybrid materials were synthesized through an in-situ approach, integrating electrochemically active rGO derived from industrial graphite waste, Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub> derived from MAX phase (Mo<sub>2</sub>Ti<sub>2</sub>AlC<sub>3</sub>) and NiO nanoparticles. XRD, FTIR, UV-Vis, Raman spectroscopy, SEM-EDS, HR-TEM, BET, and XPS analysis were done to confirm the structural integrity and elemental composition of NiO-rGO/Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub>. The synergistic effects of rGO and MXene with NiO nanoparticles facilitate NiO-rGO/Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub> as a potential electrocatalyst to enhance the electrocatalytic oxidation of dopamine. The NGM21-modified electrode exhibited superior electrochemical performance for dopamine detection, demonstrating high sensitivity (1.441 × 10<sup>−4</sup> μA μM<sup>−1</sup>), a broad detection range (0.002–0.012 μM), a limit of quantification of 4.79 nM, and a low detection limit of 1.44 nM. Cyclic voltammetry and differential pulse voltammetry analysis of NGM21-modified electrode revealed rapid current response, excellent selectivity, and minimal interference from common analytes in the electrocatalytic detection of dopamine. Furthermore, real sample analysis demonstrated remarkable reproducibility, with recovery rates of 107 % in urine and 98–103 % in serum samples. Therefore, the results suggest that the ternary NiO-rGO/Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub> is a robust and reliable electrode material for the electrochemical detection of the neurotransmitter dopamine in medical applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117876"},"PeriodicalIF":4.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844635","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

Photocatalytic water treatment by perovskite materials: Review 钙钛矿材料光催化水处理研究进展

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-12 DOI: 10.1016/j.synthmet.2025.117875

Sumedha Harike Nagarajarao , Praveen Beekanahalli Mokshanatha , Swaraj Servottam

{"title":"Photocatalytic water treatment by perovskite materials: Review","authors":"Sumedha Harike Nagarajarao , Praveen Beekanahalli Mokshanatha , Swaraj Servottam","doi":"10.1016/j.synthmet.2025.117875","DOIUrl":"10.1016/j.synthmet.2025.117875","url":null,"abstract":"<div><div>Researchers worldwide are actively exploring the enhancement and utilization of visible-light energy for environmental remediation and the degradation of organic and other pollutants. Over the past 20 years, significant efforts have been dedicated to developing safe and cost-effective photo catalysts with well-structured configurations that exhibit stability under light exposure. Among the numerous reported photocatalysts, oxides of ternary metals doped with non-metals and metals have garnered attention. Notably, perovskite materials have gained popularity as photocatalysts based on semiconductors because of their adaptability in synthesis methods and simplicity in production. Perovskite materials exhibit unique properties that render them highly appealing for photocatalytic applications, including their remarkable charge carrier mobility, adjustable bandgap, and outstanding light absorption capabilities. These inherent qualities make perovskites suitable for a wide range of photocatalytic applications. The review emphasizes on the current progress of similar perovskite materials and the systems they are connected to emphasizing diverse synthesis strategies, morphological aspects of perovskite materials, and prospective research directions for perovskite-based photocatalytic applications.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117875"},"PeriodicalIF":4.0,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839103","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

Recent innovations in EMI shielding materials for stealth technology 用于隐身技术的电磁干扰屏蔽材料的最新创新

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-12 DOI: 10.1016/j.synthmet.2025.117874

Lalitha Durairaj, Malathi Murugesan

{"title":"Recent innovations in EMI shielding materials for stealth technology","authors":"Lalitha Durairaj, Malathi Murugesan","doi":"10.1016/j.synthmet.2025.117874","DOIUrl":"10.1016/j.synthmet.2025.117874","url":null,"abstract":"<div><div>Electromagnetic Interference (EMI) shielding is a critical component of stealth technology, enabling platforms to reduce their radar cross-section and maintain operational secrecy. As a cornerstone of passive countermeasures in military applications, Radar Absorbent Materials (RAMs) are materials specifically engineered for lowering radar signal reflection or absorption, thereby enhancing stealth capabilities. This study explores recent advancements in EMI shielding materials, design methodologies, and the integration of Artificial Intelligence (AI) to enhance the stealth results from modern military systems. Beginning with the fundamentals of EMI shielding and its diverse applications, the subsequent sections discuss methods for evaluating shielding system effectiveness. Innovative materials such as conductive polymers, graphene-based composites, carbon, MXenes, and metamaterials are examined through the lens of cutting-edge research and development. The review highlights the importance of EMI shielding in components like cables, connectors, and enclosures, while also addressing the role of machine learning techniques in advancing this field. Challenges associated with developing stealth-enhancing and multifunctional EMI shielding materials are analysed, emphasizing the need for further study to fulfil the increasing requirements of electronic systems of the future. and stealth technologies. This review aims to provide valuable insights and direction for advancing functional EMI shielding materials.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117874"},"PeriodicalIF":4.0,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844636","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

Novel tetrapod-structured cerium-MOF/GO edifices in a redox-additive electrolyte for high-performance smart supercapacitors 高性能智能超级电容器氧化还原添加剂电解质中新型四足结构铈- mof /GO结构

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-07 DOI: 10.1016/j.synthmet.2025.117871

Shruti Rialach , Sanjeev Gautam , Navdeep Goyal , Surinder Paul

{"title":"Novel tetrapod-structured cerium-MOF/GO edifices in a redox-additive electrolyte for high-performance smart supercapacitors","authors":"Shruti Rialach , Sanjeev Gautam , Navdeep Goyal , Surinder Paul","doi":"10.1016/j.synthmet.2025.117871","DOIUrl":"10.1016/j.synthmet.2025.117871","url":null,"abstract":"<div><div>The increasing demand for efficient energy storage systems has driven research into high-performance advanced materials for supercapacitors. Current advancement in the creation of smart supercapacitors leads to the introduction of Cerium-(Metal-Organic-Frameworks)/Graphene Oxide (Ce-MOF/GO) edifices as active electrode materials, investigating two distinct morphologies of the MOF precursor. Structural transformations were analyzed using X-ray diffraction (XRD) with Rietveld refinement, which confirmed the formation of Ce-MOF/GO. High-resolution transmission electron microscopy (HR-TEM) revealed uniformly dispersed tetrapod-structured Ce-2,6-Naphthalenedicarboxylic acid/GO (CDG) and rod-structured Ce-1,3,5-Benzenetricarboxylic acid/GO (CTG) crystallites within the GO matrix, whereas Fourier transform infrared (FT-IR) spectroscopy revealed the oxygen-comprising functional groups attached to their surface. The electrochemical performance was evaluated through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a redox-additive electrolyte, for which CDG demonstrated noteworthy performance based on various parameters, owing to its tetrapod structure which furnishes greater surface area and more active sites, leveraging ion diffusion and redox reactions. CDG demonstrated an outstanding specific capacitance of 2372.08 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>, and a high energy density of 766.84 Wh kg<sup>−1</sup> at a power density of 4.00 kW kg<sup>−1</sup>, in the redox-additive [KOH + KFC] electrolyte, whilst retaining 94.83 % of the initial capacitance after 10,000 charging/discharging cycles. These findings underscore the potential of Ce-MOF/GO composites, particularly CDG, making it a promising candidate for next-generation smart supercapacitors, with applications ranging from sustainable energy solutions to adaptive, intelligent devices in modern electronics.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117871"},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807015","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

Polypyrrole/silver/graphene ternary composites for high-performance Ku-band electromagnetic interference shielding 高性能ku波段电磁干扰屏蔽用聚吡咯/银/石墨烯三元复合材料

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-07 DOI: 10.1016/j.synthmet.2025.117873

Vrinda S. Punnakkal , Anilkumar Ramakrishnan , Anju Pradeep , Aslam Hossain , Manu Punnen John , E.I. Anila

{"title":"Polypyrrole/silver/graphene ternary composites for high-performance Ku-band electromagnetic interference shielding","authors":"Vrinda S. Punnakkal , Anilkumar Ramakrishnan , Anju Pradeep , Aslam Hossain , Manu Punnen John , E.I. Anila","doi":"10.1016/j.synthmet.2025.117873","DOIUrl":"10.1016/j.synthmet.2025.117873","url":null,"abstract":"<div><div>Unwanted electromagnetic waves can significantly affect the performance of electronic devices and communication systems. A high-performance electromagnetic interference shielding (EMI) material is a solution to this issue. This study introduces a cost-effective one-pot synthesis method for polypyrrole/silver (Ppy/Ag), polypyrrole/graphene (Ppy/Gr) and polypyrrole/silver/graphene (Ppy/Ag/Gr) ternary composites with adjustable graphene concentrations. Detailed structural and morphological analyses using FTIR, XRD and STEM confirm the successful incorporation of Ag nanoparticles and graphene into the polypyrrole matrix. The total shielding effectiveness (SE<sub>T</sub>) of the ternary composites in the Ku band shows an impressive 30.86 dB at 12.7 GHz for the 5 wt.% graphene composite, primarily driven by absorption mechanisms (SE<sub>A</sub>> SE<sub>R</sub>). The synergistic interaction between Ag, which provides conductive pathways, and graphene, which offers structural reinforcement, significantly enhances interfacial polarisation and conductivity, surpassing the performance of binary counterparts (Ppy/Ag and Ppy/Gr. The results of this work introduce a lightweight, potent and economical composite material for EMI shielding applications in the Ku band.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117873"},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790885","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

Simultaneous trifunctional group passivation using imidazole derivatives for enhanced performance of perovskite solar cells 咪唑衍生物同时三官能团钝化提高钙钛矿太阳能电池性能

IF 4 3区材料科学

Synthetic Metals Pub Date : 2025-04-06 DOI: 10.1016/j.synthmet.2025.117872

Jun Yang , Qiaoli Niu , Yuqing Chen , Baoxiang Chai , Junhao Xiong , Wenjin Zeng , Xinwen Peng , Emmanuel Iwuoha , Ruidong Xia

{"title":"Simultaneous trifunctional group passivation using imidazole derivatives for enhanced performance of perovskite solar cells","authors":"Jun Yang , Qiaoli Niu , Yuqing Chen , Baoxiang Chai , Junhao Xiong , Wenjin Zeng , Xinwen Peng , Emmanuel Iwuoha , Ruidong Xia","doi":"10.1016/j.synthmet.2025.117872","DOIUrl":"10.1016/j.synthmet.2025.117872","url":null,"abstract":"<div><div>Perovskite solar cells (PSCs) are one of the most promising energy technologies in the field of renewable energy. The solution-based perovskite film-forming method is one of its important advantages in commercialization. However, the polycrystalline perovskite thin films prepared by this method may also exhibit various defects, leading to a decrease in device performance. In this work, an imidazole derivative 1-(2-hydroxyethyl)-3-methylimidazolium chloride (HMCl) was used as a passivator for perovskite thin films. The imidazole moiety and hydroxyl in HMCl passivated the negatively charged I<sup>-</sup> and positively Pb<sup>2+</sup> defects in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> (MAPbI<sub>3</sub>), respectively. Meanwhile the chloride ion establishes ionic bonds with uncoordinated Pb<sup>2+</sup>, further enhancing the passivation of defects. With HMCl, the PCE of the PSC was enhanced from 17.53 % of the control device to 19.71 %. In addition, the introduction of HMCl enhanced the hydrophobicity of perovskite films, and therefore, improved the storage stability of PSCs. This study provides an alternative passivator for the development of high-performance and long-term stable PSCs.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"312 ","pages":"Article 117872"},"PeriodicalIF":4.0,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816632","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}

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