Porous wide band gap BiNbO4 ceramic nanopowder synthesised by low temperature solution-based method for gas sensing applications


Autoria(s): Balamurugan, C; Lee, DW; Maheswari, AR; Parmar, M
Data(s)

2014

Resumo

In this study, we report the gas sensing behavior of BiNbO4 nanopowder prepared by a low temperature simple solution-based method. Before the sensing behaviour study, the as-synthesized nanopowder was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-diffuse reflectance spectroscopy, impedance analysis, and surface area measurement. The NH3 sensing behavior of BiNbO4 was then studied by temperature modulation (50-350 degrees C) as well as concentration modulation (20-140 ppm). At the optimum operating temperature of 325 degrees C, the sensitivity was measured to be 90%. The cross-sensitivity of as-synthesized BiNbO4 sensor was also investigated by assessing the sensing behavior toward other gases such as hydrogen sulphide (H2S), ethanol (C2H5OH), and liquid petroleum gas (LPG). Finally, selectivity of the sensing material toward NH3 was characterized by observing the sensor response with gas concentrations in the range 20-140 ppm. The response and recovery time for NH3 sensing at 120 ppm were about 16 s and about 17 s, respectively.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/50498/1/rsc_adv_4-97_54625_2014.pdf

Balamurugan, C and Lee, DW and Maheswari, AR and Parmar, M (2014) Porous wide band gap BiNbO4 ceramic nanopowder synthesised by low temperature solution-based method for gas sensing applications. In: RSC ADVANCES, 4 (97). pp. 54625-54630.

Publicador

ROYAL SOC CHEMISTRY

Relação

http://dx.doi.org/ 10.1039/c4ra08898k

http://eprints.iisc.ernet.in/50498/

Palavras-Chave #Instrumentation and Applied Physics (Formally ISU)
Tipo

Journal Article

PeerReviewed