TiO2 Nanorods Decorated with Pd Nanoparticles for Enhanced Liquefied Petroleum Gas Sensing Performance

被引:37
作者
Dhawale, Dattatray S. [1 ]
Gujar, Tanaji P. [2 ]
Lokhande, Chandrakant D. [3 ]
机构
[1] Hamad Bin Khalifa Univ, QEERI, Qatar Fdn, POB 34110, Doha, Qatar
[2] Univ Bayreuth, Dept Macromol Chem, Appl Funct Polymers, D-95440 Bayreuth, Germany
[3] DY Patil Univ, Ctr Interdisciplinary Studies, Kolhapur 416606, Maharashtra, India
关键词
THIN-FILM; SENSOR APPLICATIONS; NANOSTRUCTURED MATERIALS; LPG; OXIDE; METAL; TEMPERATURE; PHOTOCATALYSIS; FABRICATION; TIME;
D O I
10.1021/acs.analchem.7b02312
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Development of highly sensitive and selective semiconductor based metal oxide sensor devices to detect toxic, explosive, flammable,' and pollutant gases is still a challenging research topic. In the present work, we systematically enhanced the liquefied petroleum gas (LPG) sensing performance of chemical bath deposited TiO2 nanorods by decorating, Pd nanoparticle catalyst. Surface morphology with elemental mapping, crystal structure, composition and oxidation states, and surface area measurements of pristine TiO2 and Pd:TiO2 nanorods was examined by high resolution transmission electron microscopy with energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and nitrogen adsorption-desorption characterization techniques. LPG sensing performance of pristine TiO2 and Pd:TiO2 nanorods was investigated in different LPG concentration and operating temperature ranges. The LPG response of 21% for pristine TiO2 nanorods is enhanced to 49% after Pd catalyst decoration with reasonably fast response and recovery times. Further, the sensor exhibited long-term stability, which could be due to the strong metal support (Pd:TiO2) interaction and catalytic properties offered by the Pd nanoparticle catalyst. The work described herein demonstrates a general and scalable approach that provides a promising route for rational design of variety of sensor devices for LPG detection.
引用
收藏
页码:8531 / 8537
页数:7
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