Preparation and gas sensing performance of MXene (Ti3C2Tx)

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-09-19 DOI:10.1016/j.sna.2025.117068

Chenwei Zhang , Lijun Qian , Wen Zeng

{"title":"Preparation and gas sensing performance of MXene (Ti3C2Tx)","authors":"Chenwei Zhang , Lijun Qian , Wen Zeng","doi":"10.1016/j.sna.2025.117068","DOIUrl":null,"url":null,"abstract":"<div><div>This study employed potassium hydroxide (KOH) alkaline treatment and inert gas annealing to fabricate Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> materials featuring enriched oxygen-containing functional groups and large interlayer spacing. The microstructure was characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD), with systematic investigation of gas-sensing properties and underlying mechanisms. Results indicate that alkaline treatment significantly enlarged the interlayer spacing from 9.1 Å to 12.8 Å while moderately increasing the O/F ratio. Subsequent annealing maintained the enlarged interlayer spacing (12.1 Å) while substantially elevating the O/F ratio to 21.29. The optimized material exhibited a 35.7 % response to 200 ppm NH<sub>3</sub> - representing a 91 % enhancement over pristine Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>—alongside a reduced response time (170 s). Mechanistic analysis reveals that the increased density of surface oxygen-functional groups (-OH, =O) coupled with expanded interlayer spacing critically enhanced gas-sensing performance. This work provides an effective strategy for designing high-performance single-component MXene-based gas sensors.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"395 ","pages":"Article 117068"},"PeriodicalIF":4.9000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators A-physical","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092442472500874X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

This study employed potassium hydroxide (KOH) alkaline treatment and inert gas annealing to fabricate Ti₃C₂T_x materials featuring enriched oxygen-containing functional groups and large interlayer spacing. The microstructure was characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD), with systematic investigation of gas-sensing properties and underlying mechanisms. Results indicate that alkaline treatment significantly enlarged the interlayer spacing from 9.1 Å to 12.8 Å while moderately increasing the O/F ratio. Subsequent annealing maintained the enlarged interlayer spacing (12.1 Å) while substantially elevating the O/F ratio to 21.29. The optimized material exhibited a 35.7 % response to 200 ppm NH₃ - representing a 91 % enhancement over pristine Ti₃C₂T_x—alongside a reduced response time (170 s). Mechanistic analysis reveals that the increased density of surface oxygen-functional groups (-OH, =O) coupled with expanded interlayer spacing critically enhanced gas-sensing performance. This work provides an effective strategy for designing high-performance single-component MXene-based gas sensors.

查看原文本刊更多论文

MXene （Ti3C2Tx）的制备及其气敏性能

本研究采用氢氧化钾（KOH）碱性处理和惰性气体退火法制备了含氧官能团丰富、层间距大的Ti3C2Tx材料。利用扫描电子显微镜（SEM）和x射线衍射仪（XRD）对其微观结构进行了表征，并对其气敏性能和机理进行了系统的研究。结果表明：碱性处理显著增大了层间距，从9.1 Å增大到12.8 Å，同时适度提高了O/F比；随后的退火保持了较大的层间距（12.1 Å），同时将O/F比大幅提高到21.29。优化后的材料对200 ppm NH3的响应率为35.7 %，比原始ti3c2tx提高了91 %，同时响应时间缩短了170 s。机理分析表明，表面氧官能团（-OH, =O）密度的增加和层间距的扩大对气敏性能的提高至关重要。这项工作为设计高性能单组分mxene气体传感器提供了一种有效的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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...