Controlled synthesis of hierarchical tungsten oxide hydrates for efficient acetone detection

Enhanced Acetone-Sensing Properties of Pt-Decorated In2O3 Hollow Microspheres Derived from Pt-Embedded Template

“…Deficient oxygen, on the other hand, gives more free electrons as electron donors and active sites . As for 2Pt-In 2 O 3 samples, the relative percentage of the O v + O c component significantly increases from 46.42% to 55.08%, which means that compared with pure In 2 O 3 , more surface chemisorbed oxygen and reactive oxygen were involved in the electron transfer process on the material surface …”

“…37 As for 2Pt-In 2 O 3 samples, the relative percentage of the O v + O c component significantly increases from 46.42% to 55.08%, which means that compared with pure In 2 O 3 , more surface chemisorbed oxygen and reactive oxygen were involved in the electron transfer process on the material surface. 12 The N 2 adsorption−desorption isotherms and pore size distribution curves of 2Pt-In 2 O 3 are shown in Figure 6. 2Pt-In 2 O 3 and pure In 2 O 3 had a regular IV-type curve with a type H 3 hysteresis loop (Figure 6a,c), demonstrating the homogeneous formation of mesopores.…”

“…Yao et al presented a comprehensive engineering review of metal–organic framework (MOF)-derived hollow MOS semiconductor heterostructures for gas sensor applications, focusing on the advantages s and representative application examples for toxic gas . Unfortunately, MOS-based sensors have sluggish response/recovery rates, limited selectivity, and inadequate detection limits at high working temperatures (250–500 °C), which contradicts most practical applications. , For acetone sensors, one very important issue is the low detection limit and the stability at high humidity, which has been emphasized in numerous acetone-related studies and reviews. − This is the main reason why acetone exhaled breath detection has not yet reached the clinical stage. Therefore, various strategies to modify metal oxides have been reported to improve the performance of acetone detection.…”

Sodium Dodecyl Sulfate-Adjusted Phase Composition of Hydrated Tungsten Oxides as Stable Self-Supporting Electrodes for Supercapacitors with High Volumetric Specific Capacitance

“…20 Cao et al use L-lactic acid as a chelator in a hydrothermal reaction to facilitate lamellar growth of WO 3 • H 2 O nanoplates and WO 3 •H 2 O hollow spheres under low and high concentrations of L-lactic acid, respectively. 21 Wu et al have discovered that the morphology of WO 3 •2H 2 O obtained from anodic oxidation can be effectively tuned from aggregated flakes to nanobelts by increasing the concentration of ethylene glycol in the electrolyte. 21 Except for controlling the morphology and/or size of the products, other functions of the additives for synthesizing WO 3 •xH 2 O have not been reported.…”

“…21 Wu et al have discovered that the morphology of WO 3 •2H 2 O obtained from anodic oxidation can be effectively tuned from aggregated flakes to nanobelts by increasing the concentration of ethylene glycol in the electrolyte. 21 Except for controlling the morphology and/or size of the products, other functions of the additives for synthesizing WO 3 •xH 2 O have not been reported. To our knowledge, so far there is only one exception showing that when additive ethylenediaminetetraacetic acid was replaced by DL-malic acid, the final product would change from WO 3 •0.33H 2 O to WO 3 •2H 2 O.…”