Functionalized MWCNTs@ZnO nanocomposites via spray printing for NO2 gas sensing

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-27 DOI:10.1007/s10854-025-14663-9

Mohamed Ahmed Belal, Sugato Hajra, Swati Panda, Kushal Ruthvik Kaja, Kyeong Jun Park, Runia Jana, P. Ganga Raju Achary, Hoe Joon Kim

{"title":"Functionalized MWCNTs@ZnO nanocomposites via spray printing for NO2 gas sensing","authors":"Mohamed Ahmed Belal, Sugato Hajra, Swati Panda, Kushal Ruthvik Kaja, Kyeong Jun Park, Runia Jana, P. Ganga Raju Achary, Hoe Joon Kim","doi":"10.1007/s10854-025-14663-9","DOIUrl":null,"url":null,"abstract":"<div>The accurate and timely detection of nitrogen dioxide gas (NO2) is of utmost relevance in environmental monitoring and industrial applications. This study examines the process of functionalizing multi-walled carbon nanotubes (FMWCNTs) by treating them with a combination of sulfuric acid and nitric acid. The proposed treatment method improves the chemical reactivity of carbon nanotubes by the addition of hydroxyl and carboxylic functional groups. The FMWCNTs combined with zinc oxide (ZnO) are synthesized via a hydrothermal process, forming FMWCNTs@ZnO composites. The synthesized materials underwent various material characterizations. The composites are then printed over a silicon wafer substrate with lithographically patterned interdigitated electrodes in a square shape. 10 mg FMWCNTs in Zn(NO3)2·6H2O (CNTZ2) showed the best gas-sensing capability. The sensor exhibits good gas response and fast response/recovery times at room temperature (RT) with values of 80% and 131/156 s at 100 ppm, respectively, as well as lifetime testing for 40 days. The spray printing method is simple and economical which can be utilized for coating on various substrates. Moreover, the proposed functionalization process allows good gas-sensing properties even at RT. This work paves the way towards new opportunities and fostering an optimistic outlook for the future of gas-sensing technology.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 12","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science: Materials in Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10854-025-14663-9","RegionNum":4,"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

The accurate and timely detection of nitrogen dioxide gas (NO₂) is of utmost relevance in environmental monitoring and industrial applications. This study examines the process of functionalizing multi-walled carbon nanotubes (FMWCNTs) by treating them with a combination of sulfuric acid and nitric acid. The proposed treatment method improves the chemical reactivity of carbon nanotubes by the addition of hydroxyl and carboxylic functional groups. The FMWCNTs combined with zinc oxide (ZnO) are synthesized via a hydrothermal process, forming FMWCNTs@ZnO composites. The synthesized materials underwent various material characterizations. The composites are then printed over a silicon wafer substrate with lithographically patterned interdigitated electrodes in a square shape. 10 mg FMWCNTs in Zn(NO₃)₂·6H₂O (CNTZ2) showed the best gas-sensing capability. The sensor exhibits good gas response and fast response/recovery times at room temperature (RT) with values of 80% and 131/156 s at 100 ppm, respectively, as well as lifetime testing for 40 days. The spray printing method is simple and economical which can be utilized for coating on various substrates. Moreover, the proposed functionalization process allows good gas-sensing properties even at RT. This work paves the way towards new opportunities and fostering an optimistic outlook for the future of gas-sensing technology.

查看原文本刊更多论文

用于NO2气体传感的喷射打印功能化MWCNTs@ZnO纳米复合材料

准确和及时地检测二氧化氮气体（NO2）在环境监测和工业应用中至关重要。本研究考察了用硫酸和硝酸组合处理多壁碳纳米管（FMWCNTs）的功能化过程。所提出的处理方法通过添加羟基和羧基官能团来提高碳纳米管的化学反应性。采用水热法合成了FMWCNTs与氧化锌（ZnO）结合，形成FMWCNTs@ZnO复合材料。合成材料进行了各种材料表征。然后将复合材料印刷在硅晶片衬底上，上面有平版印刷的方形交叉电极图案。10 mg FMWCNTs在Zn(NO3)2·6H2O （CNTZ2）中表现出最好的气敏性能。该传感器在室温（RT）下表现出良好的气体响应和快速的响应/恢复时间，在100 ppm下分别为80%和131/156 s，寿命测试为40天。该方法简便、经济，可用于各种基材的喷涂。此外，所提出的功能化工艺即使在室温下也能实现良好的气敏性能。这项工作为气敏技术的未来创造了新的机遇和乐观的前景。

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

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.