The enhanced sensing properties of MOS-based resistive gas sensors by Au functionalization: a review

Abstract

Au-functionalized MOS-based gas sensing materials.

Surface Modification of CuFe2O4 Nanotubes with Well-Dispersive Au Nanoparticles for Sensitive and Selective Xylene Gas Detection

“…Actually, Au NPs can accelerate the dissociation of aromatic rings. 4,15 In addition, it can be observed that an excessive coating on the active surface of the CuFe 2 O 4 NTs, resulting from overloading Au NPs, leads to a decrease in xylene responses from the 3 and 5 wt % Au-CuFe 2 O 4 sensors, thereby reducing their utilization rate and overall catalytic activity. ■ AUTHOR INFORMATION…”

“…10−14 Among these strategies, the utilization of Au nanoparticles (NPs) has proven effective in accelerating the dissociation of aromatic rings due to their remarkable catalytic activity. 15 For instance, Sui et al reported that Au-loaded MoO 3 hollow spheres showed enhanced performance in detecting BTX gases due to the synergistic effects of "spillover effect" (or chemical sensitization) and catalysis activity of Au NPs and Au/MoO 3 Schottky barrier. 10 Similarly, Li et al synthesized Au-loaded WO 3 •H 2 O nanocubes for improving the sensitivity and selectivity in xylene sensing.…”

“…Namely, two types of mechanisms (electronic and chemical sensitization) have been proposed to identify the role of Au NPs in gas sensing. Numerous reports have pointed out that size, content, and fabrication parameters of Au NPs can greatly influence both catalytic efficiency and performances of MOS-based sensors. ,, Therefore, achieving controllable fabrication of Au-functionalized MOS materials is still necessary, particularly in order to understand the dominant interactions between MOS and Au.…”

Metal–organic framework-derived metal oxides for resistive gas sensing: a review

“…67 Semiconductor materials are employed in these sensors as their sensing components. 68–71 The target gas molecules are drawn to the active spots on the semiconductor material when it comes in contact with it. Resistance changes as a result of this contact, which alters how electrons travel within the material.…”

Stabilizing Single-Atom Pt on Fe2O3 Nanosheets by Constructing Oxygen Vacancies for Ultrafast H2 Sensing

“…Redox reactions between the target gas and chemisorbed oxygen species are the mechanism of sensing . Fabrication of nanostructured MOS materials with a high specific surface area has proved to be an effective strategy to promote gas adsorption for enhanced sensing performance. , Alternatively, noble metal particles (such as Pt, , Pd, Rh, and Au) are extensively utilized as catalysts to optimize the sensing performance of MOS sensors due to their remarkable electronic and catalytic activity. Noble metal industrial applications in chemical sensors are, however, severely limited by their high cost.…”