Enhanced gas-sensing response by gamma ray irradiation: Ag/Ag₂SnO₃nanoparticle-based sensor to ethanol, nitromethane and acetic acid

Abstract

nanoparticles were synthesized by irradiating Ag 2 SnO 3 with different doses of gamma rays ranging from 0 to 500 kGy. The irradiated products were employed to detect two reducing gases (ethanol and nitromethane) and one oxidizing gas (acetic acid). The response was found to be dependent on irradiation dose, which influenced the content of Ag. The results showed that the best gas-sensing performance was achieved at the dose of 400 kGy: the responses were enhanced 9, 6.3 and 10.6 fold compared with the unirradiated Ag 2 SnO 3 for ethanol, nitromethane and acetic acid, respectively.

Hydrocarbon detection with metal oxide semiconducting gas sensors modified by overlayer or admixture of zeolites Na-A, H-Y and H-ZSM-5

“…It is possible that the observed p-type behaviour is due to the production of an oxidising gas such as acetic acid, formed as part of the reaction processes taking place at the sensor surface. Yin et al (2014) exposed Ag/Ag 2 SnO 3 nanoparticles to ethanol and acetic acid, reporting an increase in resistance upon exposure to the gas, which may act as oxidising (41). This could indeed support the results found in this study i.e.…”

Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

“…Another important aspect of these systems is their high surface to volume ratio, which confers them a very high reactivity with the surroundings as well as the possibility to modify their external surfaces with an appropriate surface chemistry. On this basis, many metal nanoparticles-based sensors have been studied and developed [ 33 , 34 , 35 , 36 , 37 ]. The main application of such optical sensors is the detection of heavy-metals, which have long been known to be harmful for the environment and toxic for human health, above very small concentrations, a few ppm or lower, as reported in the literature [ 38 , 39 , 40 ] and by the Guidelines for Drinking-Water Quality by the World Health Organization (WHO) [ 41 ].…”

Effects of gamma irradiation on hydrogen gas-sensing characteristics of Pd–SnO2 thin film sensors

“…In addition, no detectable peak of the Pd or PdO phase can be observed in the XRD pattern. It was reported that a noble metal oxide can be reduced to metal under gamma ray irradiation [24,28]. This absence of a detectable peak is possibly because of the low crystallinity or low content of the Pd or PdO.…”

“…Indluru et al [22] studied the effects of gamma irradiation on IneZnO thin film transistors and found that electron mobility increased after the exposure. Radioactive environments, including those with gamma radiation, are believed to strongly influence the gassensing characteristics of metal oxide-based biosensors [23] and gas sensors [24]. Gamma rays were used to irradiate Ag 2 SnO 3 samples, leading to formation of Ag from Ag 2 SnO 3 , and the interaction between Ag and Ag 2 SnO 3 enhanced the response approximately six-fold compared with pristine Ag 2 SnO 3 [24].…”

“…Radioactive environments, including those with gamma radiation, are believed to strongly influence the gassensing characteristics of metal oxide-based biosensors [23] and gas sensors [24]. Gamma rays were used to irradiate Ag 2 SnO 3 samples, leading to formation of Ag from Ag 2 SnO 3 , and the interaction between Ag and Ag 2 SnO 3 enhanced the response approximately six-fold compared with pristine Ag 2 SnO 3 [24]. Gamma irradiation also improved the sensitivity of AgFeO 2 nanoparticles to ethanol, where the enhancement of gas-sensing characteristics was ascribed to the generation of defects in the nanoparticles [25].…”