Enhanced room temperature selective ammonia sensing based on SnO2 decorated MXene

Authors

  • Kamaraj Govindharaj Bharathiar University
  • MathanKumar Manoharan Bharathiar University
  • Krishnamoorthy Rajavel Shenzhen Institute of Advanced Electronic Materials
  • Yuvaraj Haldorai Bharathiar University
  • Rajendrakumar R T Bharathiar University

Keywords:

MXene, Chemiresistive sensor, Nanoparticle, Heterojunction, Gas Sensing, Sensor

Abstract

SnO2/MXene nanocomposites were prepared by decorating SnO2 nanoparticles over few layer MXene using ultra-sonication.  The SnO2/MXene composite exhibit highly selective and sensitive towards trace level ammonia detection at room temperature. The linear sensing response R2=0.938 and R2=0.971 obtained for ammonia concentration 0.5 to 5 ppm and 10 to 100 ppm respectively.  The SnO2 nanoparticles loaded MXene sheets shows shorter response time about 16 sec compared with pristine SnO2 response time (~61 sec). The formation of Schottky junction between SnO2 and MXene results in the formation the charge depletion between the SnO2/MXene interface and further the charge depletion increases over ammonia vapor interaction resulting in the increase of the sensor resistance. Besides, quick reversibility over 50 cycles, room temperature operation, high sensitivity, faster response/recovery time, and simple fabrication approach of making SnO2 loaded MXene materials could be interesting for making next generation selective detection of ammonia molecules.  

Author Biography

  • Rajendrakumar R T, Bharathiar University

    Department of Nanoscience and technology, Bharathiar University, Coimbatore 641 046, Tamil Nadu

MXene Ammonia gas sensing

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Published

2022-02-15

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Section

Articles

How to Cite

Enhanced room temperature selective ammonia sensing based on SnO2 decorated MXene. (2022). Journal of Materials NanoScience, 9(1), 68-73. https://pubs.thesciencein.org/journal/index.php/jmns/article/view/299

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