Evanescent wave ammonia sensor: influence of nanocrystalline TiO 2 on V 2 O 5 and MoO 3

Micro & nano letters

article

Paramasivam Chandrasekar¹  Thangaraj Subashini²  Balusamy Renganathan³  Thanigainathan Prakash² 

[1] Geetha Jeevan Arts and Science College;National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus;Applied Optics Laboratory, Indian Institute of Technology Madras

关键词: grain boundaries;    ammonia;    gas sensors;    fibre optic sensors;    titanium compounds;    X-ray diffraction;    field emission scanning electron microscopy;    nanocomposites;    vanadium compounds;    molybdenum compounds;    nanofabrication;    nanosensors;    TiO2-V2O5;    V2O5;    MoO3;    TiO2-MoO3;    NH3;    composite material;    evanescent wave ammonia sensor;    clad-modified fibre optic ammonia sensor;    structural properties;    microstructural properties;    grain boundaries;    ammonia sensing measurement;    field emission scanning electron microscopy;    ammonia exposures;    powder X-ray diffractometer;    nanocrystalline anatase phase TiO2;   

DOI  :  10.1049/mnl.2019.0451

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Clad-modified fibre optic ammonia sensor was developed subsequently using pure V 2 O 5 , MoO 3 , and its composites with TiO 2 . Prior to the sensing measurement, the composite was synthesised and studied for the structural and microstructural properties using powder X-ray diffractometer and field emission scanning electron microscope. The analysis confirms the existence of nanocrystalline anatase phase TiO 2 in the grain boundaries of microcrystalline V 2 O 5 /MoO 3 in the composites. Ammonia sensing measurement was performed for different concentrations of ammonia exposures up to 500 ppm. The obtained response was applied to calculate the sensitivity and it was found to be superior for the clad modified with composite material as compared to the pure microcrystalline samples are discussed in detail.

【 授权许可】

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