Solvent-regulated solvothermal synthesis and morphology-dependent gas-sensing performance of low-dimensional tungsten oxide nanocrystals

Synthesis, Characterization, and Gas Sensing Applications of WO3 Nanobricks

“…7, the WO 3 sensor demonstrates apparently higher sensitivity to ethanol than to other gases, indicating it may have potential applications in ethanol detection. In comparison with the previous studies on WO 3 sensors (Table 1), the sensitivity of the WO 3 sensor prepared in this work is higher than other WO 3 sensors (Ref [19][20][21], demonstrating the WO 3 nanobricks have great advantages in ethanol detection than other morphologies.…”

Pd-loaded SnO2 hierarchical nanospheres for a high dynamic range H2S micro sensor

“…20 Using a nanostructure with a large surface-to-volume ratio, the SnO 2 gas sensors showed improved resistive responses when exposed to target gases. [20][21][22] Further improvement, such as in terms of the detection range and selectivity, of the gas sensing performance was achieved via surface loading of noble metals, [23][24][25][26][27] for example Au, 28,29 Ag, 20,30,31 Pd 32,33 and Pt. 34,35 Compared with other metals, palladium (Pd) has a low binding energy, and the low barriers for hydrogen dissociation and oxygen adsorption reduce the activation energy; thus, it can affect the conductivity and gas response of the sensitive membrane of the sensor.…”

Ultrasensitive and low detection limit of acetone gas sensor based on W-doped NiO hierarchical nanostructure

“…Resistive gas sensors based on metal oxide semiconductors such as SnO 2 [1,2], ZnO [3,4], TiO 2 [5,6], WO 3 [7][8][9][10][11][12], In 2 O 3 [13,14], α-Fe 2 O 3 [15], and NiO [16] occupy the significant positions in the field of gas sensors for monitoring and detecting inflammable, explosive, or toxic gases due to the advantages of low cost, simple operation and portability. Extensive research efforts have been committed to develop high-performance gas sensors with high sensitivity and low detection limit [17].…”