Noble metal decorated Ti3C2Tx MXene for room temperature SO₂ detection

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-03-25 DOI:10.1016/j.sna.2025.116492

Shilpa M P , K.S. Ashadevi , Shivakumar Jagadish Shetty , Saideep Shirish Bhat , Nalajala Naresh , Vikash Mishra , Maqsood R. Waikar , Rajendra G. Sonkawade , Gurumurthy S C

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引用次数: 0

Abstract

This paper presents an in-depth investigation into the synthesis and characterization of Ti₃C₂Tₓ MXene and its noble metal-decorated variants (Ti₃C₂Tₓ-Ag and Ti₃C₂Tₓ-Au), underscoring their viability for the fabrication of high-performance SO₂ sensors. A self-reduction approach was employed to decorate Ti₃C₂T_x MXene with noble metals, and comprehensive characterization techniques enabled a detailed analysis of their properties. The formation of multilayered, and delaminated Ti₃C₂T_x and its successful decoration with Ag and Au nanoparticles (NPs) was confirmed using X-ray diffraction (XRD) analysis. The accordion-like morphology of multilayered Ti₃C₂T_x and transparent sheet-like structure were observed via field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). SO₂ sensing measurements revealed that Ti₃C₂T_x, along with its Ag- and Au-decorated Ti₃C₂T_x, demonstrated room-temperature SO₂ sensing with rapid response and recovery times. The loading of noble metals significantly improved sensitivity, with Ag-Ti₃C₂T_x showing the highest response. Density functional theory (DFT) calculations were performed to elucidate the mechanism underlying the enhanced sensitivity following noble metal decoration. The study results forecast a significant contribution to the development of Ti₃C₂T_x MXene for gas sensing applications.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...