Facile Fabrication of MoS₂-Modified SnO₂ Hybrid Nanocomposite for Ultrasensitive Humidity Sensing

Abstract

An ultrasensitive humidity sensor based on molybdenum-disulfide- (MoS2)-modified tin oxide (SnO2) nanocomposite has been demonstrated in this work. The nanostructural, morphological, and compositional properties of an as-prepared MoS2/SnO2 nanocomposite were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive spectrometry (EDS), nitrogen sorption analysis, and Raman spectroscopy, which confirmed its successful preparation and rationality. The sensing characteristics of the MoS2/SnO2 hybrid film device against relative humidity (RH) were investigated at room temperature. The RH sensing results revealed an unprecedented response, ultrafast response/recovery behaviors, and outstanding repeatability. To our knowledge, the sensor response yielded in this work was tens of times higher than that of the existing humidity sensors. Moreover, the MoS2/SnO2 hybrid nanocomposite film sensor exhibited great enhancement in humidity sensing performances as compared to the pure MoS2, SnO2, and graphene counterparts. Furthermore, complex impedance spectroscopy and bode plots were employed to understand the underlying sensing mechanisms of the MoS2/SnO2 nanocomposite toward humidity. The synthesized MoS2/SnO2 hybrid composite was proved to be an excellent candidate for constructing ultrahigh-performance humidity sensor toward various applications.

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

“…Continuous condensing of water breaks the single hydrogen bonding; protons start to move freely [54]. SnO 2 nanocrystals have an effective electronic interaction with rGO [55,56,57], hence the rGO-SnO 2 facilitates the detection of water molecule. The rGO-SnO 2 system can detect the water molecules that are normally undetectable by rGO, since the rGO-SnO 2 system is potentially superior.…”

A Novel Silicon Carbide Nanosheet for High‐Performance Humidity Sensor

“…If the relative humidity rises up to a high level (85 and 95% RH), part of the semicircle becomes invisible, while the end line becomes more apparent, as shown in Figure c. This means that more protons can transfer and penetrate into the SiC NSs, leading to the big decrease in sensor impedance and increase in sensor capacitance …”

Novel strategy for molybdenum disulfide nanosheets grown on titanate nanotubes for enhancing the flame retardancy and smoke suppression of epoxy resin

“…Figure shows the XRD patterns of the as‐synthesized MoS 2 , TNTs, heat‐treated TNTs, and MoS 2 –TNT hybrid. According to the XRD patterns, the diffraction peaks at 14.0° (002), 33.2° (100), 39.3° (103), and 58.7° (110) of the as‐synthesized MoS 2 nanolayers were attributed to the MoS 2 nanocrystal structure . For the TNTs, there were two characteristic peaks at 25.2 and 48.0 °, respectively.…”