Synthesis and high sensing properties of a single Pd-doped SnO2 nanoribbon

Abstract

Monocrystal SnO2 and Pd-SnO2 nanoribbons have been successfully synthesized by thermal evaporation, and novel ethanol sensors based on a single Pd-SnO2 nanoribbon and a single SnO2 nanoribbon were fabricated. The sensing properties of SnO2 nanoribbon (SnO2 NB) and Pd-doped SnO2 nanoribbon (Pd-SnO2 NB) sensors were investigated. The results indicated that the SnO2 NB showed a high sensitivity to ethanol and the Pd-SnO2 NB has a much higher sensitivity of 4.3 at 1,000 ppm of ethanol at 230°C, which is the highest sensitivity for a SnO2-based NB. Pd-SnO2 NB can detect ethanol in a wide range of concentration (1 ~ 1,000 ppm) with a relatively quick response (recovery) time of 8 s (9 s) at a temperature from 100°C to 300°C. In the meantime, the sensing capabilities of the Pd-SnO2 NB under 1 ppm of ethanol at 230°C will help to promote the sensitivity of a single nanoribbon sensor. Excellent performances of such a sensor make it a promising candidate for a device design toward ever-shrinking dimensions because a single nanoribbon device is easily integrated in the electronic devices.

Synthesis and Gas Sensing Properties of Single La-Doped SnO2 Nanobelts

“…The merit of SnO 2 doped by noble metals is that its gas-sensing sensitivity and selectivity can be controlled by the addition of various noble metal catalysts. Our research group has found that a single Pd-doped SnO 2 nanoribbon has high sensing properties to ethanol with high selectivity at 230 °C [ 14 ]. Recently, we have been studying the influence of rare earth elements on the sensing properties of SnO 2 NBs and found that La-doped SnO 2 NBs have a better response and selectivity to ethanediol.…”

A novel headspace integrated E-nose and its application in discrimination of Chinese medical herbs

“…Pd dopant aims to enhance surface active performance with various oxygen species and to increase the performance of sensing films [36][37][38] . In addition, through the gas sensor array, a multi-dimensional feature space of sample was obtained which largely remedied the insufficient selectivity and stability of an individual sensor [39] .…”

Structural, morphological and gas sensing study of palladium doped tin oxide nanoparticles synthesized via hydrothermal technique

“…Studies on the thermal stabilities showed Pd-doping could contain the growth of grain sizes below 500 C while the grain growth was enhanced with rise in temperature above 700 C and the best 2.5% of Pd has recommended for better sensitivity and thermal stability. Jiang Ma et al [20] showed Pd-doped nanoribbons exhibits much improved gas sensing property towards acetone, ethanol etc gases in comparison to the pure SnO 2 nanoribbons. Masoud Salavati-Niasari et al [21] used a new precursor, [bis (2-hydroxy-1-naphthaldehydato) tin (II)]; ([Sn (HNA) 2]), in thermal decomposition process for the synthesis of tin oxide (SnO 2 ) nanoclusters.…”