Silicon-based micro-gas sensors for detecting formaldehyde

Formaldehyde Sensing Properties of SnO–Graphene Composites Prepared via Hydrothermal Method

“…8. The response to 0.001 Â 10 À6 formaldehyde is 3.9 which is higher than those of sensors reported in literature [4,5,32,33] . Meng et al [34] reported that the detection limit of SnO 2 /graphene nanocomposite for benzene was as low as 0.005 Â 10 À6 , and SnO 2 / graphene nanocomposite composed of 4e5 nm SnO 2 nanoparticles was prepared by one-step wet chemical method, indicating that the gas-sensing properties were related to the microstructure and particle sizes of the materials, gas species as well as the preparation method.…”

Preparation of Pd nanoparticle-decorated hollow SnO 2 nanofibers and their enhanced formaldehyde sensing properties

“…In addition, in Table 1, the sensing performances of the Pd decorated hollow SnO 2 NFs gas sensor were compared with the sensors fabricated from various materials in terms of HCHO-sensing capabilities [43][44][45][46][47]. The results demonstrate that the as-prepared SnO 2 gas sensor had a low operating temperature, a high response, a wide detection range and rapid response/recovery time.…”

Direct fabrication of La0.7Sr0.3FeO3 nanofibers with tunable hollow structures by electrospinning and their gas sensing properties

“…When exposed in HCHO, the chemisorbed oxygen species adsorbed on the surface of the La 0.7 Sr 0.3 FeO 3 hollow nanofibers react with HCHO. The products could be formic acid (CHOOH) and/or water and CO 2 [47]. Both of the reactions release electrons.…”