Critical review on the derivative of graphene with binary metal oxide-based nanocomposites for high-performance supercapacitor electrodes

Main Group Metal Chemistry, Journal Year: 2025, Volume and Issue: 48(1)

Published: Jan. 1, 2025

Abstract Supercapacitors, owing to their high power density and rapid charge–discharge capabilities, have gained significant attention as energy storage devices in various applications. In the context of electrochemical supercapacitors, this article provides a comprehensive review production performance binary metal oxide (BMO) reduced graphene (rGO) composite materials. The synthesis processes synergistic benefits BMO–rGO composites, with an emphasis on how they perform better than separate parts terms specific capacitance cycle stability, are discussed. potential composites high-performance electrode materials for supercapacitors is highlighted research. work transition (TMO) rGO Composite enhanced characteristics that appropriate supercapacitor applications primary novelty, which combination variety TMOs. Compared individual TMOs or other carbonaceous materials, these demonstrate capacitance, density, cyclic rate capability. discussed, superior stability compared components. This research highlights showcasing improved charge capacity, increased excellent cycling overall durability even after numerous cycles.

Language: Английский

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Recent Advances in Conductive Polymers-Based Electrochemical Sensors for Biomedical and Environmental Applications

Polymers, Journal Year: 2024, Volume and Issue: 16(11), P. 1597 - 1597

Published: June 4, 2024

Electrochemical sensors play a pivotal role in various fields, such as biomedicine and environmental detection, due to their exceptional sensitivity, selectivity, stability, rapid response time, user-friendly operation, ease of miniaturization integration. In addition the research conducted application field, significant focus is placed on selection optimization electrode interface materials for electrochemical sensors. The detection performance these can be significantly enhanced by modifying either inorganic metal electrodes or printed electrodes. Among numerous available modification materials, conductive polymers (CPs) possess not only excellent conductivity exhibited conductors but also unique three-dimensional structural characteristics inherent polymers. This distinctive combination allows CPs increase active sites during process while providing channels ion transmission facilitating efficient electron transfer reaction processes. review article primarily highlights recent progress concerning an ideal choice owing remarkable features that make them well-suited biomedical applications.

Language: Английский

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Integrated Photonic Sensors for the Detection of Toxic Gasses—A Review

Chemosensors, Journal Year: 2024, Volume and Issue: 12(7), P. 143 - 143

Published: July 18, 2024

Gas sensing is crucial for detecting hazardous gasses in industrial environments, ensuring safety and preventing accidents. Additionally, it plays a vital role environmental monitoring control, helping to mitigate pollution protect public health. Integrated photonic gas sensors are important due their high sensitivity, rapid response time, compact size, enabling precise recognition of concentrations real-time. These leverage technologies, such as waveguides resonators, enhance performance over traditional sensors. Advancements materials fabrication techniques could further improve efficiency, making them invaluable monitoring, safety, healthcare diagnostics. In this review, we delved into that operate based on the principles evanescent field absorption (EFA) wavelength interrogation methods. advanced mechanisms allow highly sensitive selective detection, leveraging interplay light with molecules produce measurements.

Language: Английский

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Flexible Hierarchical Polyimide/Polypyrrole/Carbon Nanofiber Composite Films for Tunable Electromagnetic Interference Shielding

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(7), P. 7783 - 7793

Published: March 14, 2024

With the booming of telecommunication and microelectronics, it is essential to develop electromagnetic interference (EMI) shielding materials with low reflectivity characteristics avoid secondary pollution from waves (EMWs). Herein, we fabricated a series hierarchical polypyrrole/carbon nanofiber (PPy/CF) composites multilayer PPy films. The EMI performance can be adjusted by attaching different layered efficiency (SE) PPy/CF composite films reach 74.59 dB an electrical conductivity 3.02 × 10–3 S/mm. Moreover, in order make film have excellent strength flexibility, specially designed acetone-soluble polyimide (PI) resin encapsulate PPy/CF. After packaging PI, are imparted high flexibility mechanical properties tensile modulus 4.65 153.03 MPa, respectively. resultant PI/PPy/CF also possess favorable Joule heating sensing monitoring. temperature reaches 131.0 °C within 15 s when applied voltage 5 V. promising for applications fields aerospace, telecommunication, microelectronic engineering multifunctional wearable devices.

Language: Английский

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Synthesis of PPy/rGO/NiCoFe₂O₄ Ternary Composite and rGO/NiCoFe₂O₄ Binary Composite Hybrid Materials for the Fabrication of Flexible Carbon Cloth Electrodes for Supercapacitors

Energy Storage, Journal Year: 2025, Volume and Issue: 7(1)

Published: Jan. 6, 2025

ABSTRACT This study presents a simple, scalable approach for synthesizing binary and ternary composites tailored electrode materials, with focus on supercapacitor applications. The were fabricated by integrating reduced graphene oxide (rGO) NiCoFe 2 O 4 metal oxides the conductive polymer polypyrrole (PPy). significance of this work lies in development supercapacitors, which are highly valued their superior energy density, fast charge discharge rates, prolonged life cycle, cost‐effectiveness. composite, rGO/NiCoFe , was synthesized using sol–gel auto‐combustion method, carbon cloth serving as substrate electrochemical testing. Electrochemical analysis showed that composite exhibited specific capacitance 154 F/g at scan rate 10 mV/s. addition PPy resulted formation PPy/rGO/NiCoFe demonstrated markedly improved 210 under same conditions, underscoring synergistic effect PPy. Furthermore, galvanostatic charge–discharge (GCD) revealed values 222.5 1 A/g 145 compared to 157.1 110 composite. findings investigation emphasize significant potential high‐performance leveraging combined benefits rGO, storage capabilities.

Language: Английский

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Novel study on investigating the mechanical, microstructure morphological, and dry sliding wear characteristics of grey cast iron GG25 with copper additions for valve guides in internal combustion engine

Frontiers in Materials, Journal Year: 2024, Volume and Issue: 10

Published: Jan. 8, 2024

Introduction: The performance functionality efficacy of the engine’s valve train assembly is considerably affected by guide. Material selection impacted prolonged operational lifespan engines, which favours casting and machining materials such as cast iron. intent this study to examine dry sliding characteristics GG25 iron with copper additives. Discovering ways in variations load velocity impact wear paramount significance. Methods: research entailed examination across various environmental conditions. Loads were varied at 30 N, 40 50 N while maintaining a 1 m/s constant. In same manner, velocities 0.5 m/s, 2 constant was maintained. Experimental techniques carried out ambient temperature. Throughout investigations, frictional forces coefficient friction also determined. mechanisms samples that had become deteriorated or worn-out examined employing scanning electron microscope when combined EDX analysis. Results: A rise normal from led twofold losses, measuring 417 microns compared 222 previously. range losses observed moderate speeds (0.5 m/s–1 m/s) 133–222 microns. Conversely, maximum loss 1,226 elevated contrast 617 higher loads N. Additionally, discovered more pronounced both loading speed are moderate, whereas becomes substantial raised, culminating losses. Discussions: summary, highlights considerable effect have on prevalence conditions velocity, influence significant. However, accelerates, it predominant factor. An analysis well indicated under N–50 raised 0.238 0.43. mechanisms, discerned via microscopy analysis, underscored increased comparison loading.

Language: Английский

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Hollow mushroom nanomaterials for potentiometric sensing of Pb²⁺ ions in water via the intercalation of iodide ions into the polypyrrole matrix

Open Chemistry, Journal Year: 2024, Volume and Issue: 22(1)

Published: Jan. 1, 2024

Abstract Herein, the synthesis of a sensor for determination lead (Pb 2+ ) ions via intercalation iodide into polypyrrole matrix is performed. It demonstrated Nernstian slope 31.7 mV/decade, indicating linear response within concentration range 10 −5 –10 −1 M. The detection limit achieved 9.10 −6 M, sensor’s sensitivity to low concentrations Pb . effectiveness Ppy/I − in sensing confirmed through cyclic voltammetry, where peak potential −0.2 V observed. measured be 2 µA/M. Moreover, exhibits negative interfering ions, which enhances its selectivity detection. Furthermore, when tested with natural water samples such as tap or underground water, are typically free demonstrates normal commonly found samples. offers several advantages, including ability detect at very concentrations, flexible and adaptable design, cost-effective preparation technique. These features make it promising tool accurate efficient ions.

Language: Английский

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High-performance room-temperature formic acid vapor sensors based on multi-walled carbon nanotubes/polypyrrole composites

Talanta Open, Journal Year: 2025, Volume and Issue: unknown, P. 100419 - 100419

Published: Feb. 1, 2025

Language: Английский

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Fabrication and application of SiNWs based PANI:MO _x heterostructures for human respiratory monitoring

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(3), P. 032101 - 032101

Published: March 1, 2025

Abstract In this study, we investigate an innovative hybrid structure of silicon nanowires (SiNWs) coated with polyaniline (PANI):metal oxide (MO x ) nanoparticles, i.e., WO 3 and TiO 2 , for respiratory sensing. To date, few attempts have been made to utilize such structures that application. The SiNWs were fabricated using metal-assisted chemical etching (MACE), whereas PANI:MO was deposited oxidative polymerization. characterized Raman spectroscopy, X-ray diffraction, scanning electron microscopy. sensing characteristics revealed the sensor exhibited a considerably better response than pure SiNWs:MO SiNWs:PANI. Such enhancement in sensitivity is attributed formation p−n heterojunction between PANI MO wider conduction channel provided by PANI, increased porosity SiNWs/PANI:WO structures, which creates active sites, oxygen vacancies, large surface area compared available nanoparticles. Furthermore, less baseline drift stability established PANI:WO as PANI:TiO .

Language: Английский

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A fast response NH3 gas sensor based on phthalocyanine-optimized non-covalent hybrid of polypyrrole

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 702, P. 135037 - 135037

Published: Aug. 6, 2024

Language: Английский

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