Modified impregnation synthesis of Ru-loaded WO3 nanoparticles for acetone sensing

Acetone Sensing Properties and Mechanism of Rh-Loaded WO3 Nanosheets

“…Figure 3C shows the H 2 -TPR results of pristine and 1wt%Rh-WO 3 nanosheets. As expected, there was one weak peak around 370°C observed in pristine WO 3 nanosheets indicating a weak consumption of H 2 , which may be due to the weak reduction behavior of WO 3 surface at a high temperature (Li et al, 2018 ). In contrast, large consumptions of H 2 were observed in 1wt%Rh-WO 3 , suggesting a strong reduction behavior.…”

“…The adsorption and reaction of VOC gas on WO 3 surface could change the semiconductor resistance, so the gas response can be improved by adding highly efficient catalytic elements. The introduction of ruthenium (Ru) and silicon (Si) improve the sensitivity of WO 3 to acetone (Righettoni et al, 2010 ; Li et al, 2018 ). Further, Rh is known as a highly efficient catalyst to the catalytic reaction of acetone gas (Houtman and Barteau, 1991 ).…”

“…In this study, the Rh element was uniformly loaded onto the surface of WO 3 nanosheets based on an impregnation approach. This method has been frequently used in our previous work (Li et al, 2018 ). The experimental results show that the Rh nanoparticles can significantly enhance the response of WO 3 nanosheets to acetone without changing the surface morphology of WO 3 nanosheets.…”

Sensors for Enhanced Detection of Acetone as a Potential Tool for Noninvasive Diabetes Monitoring

“…There are numerous papers presenting the low concentration acetone detection with utilization of the WO 3 -based sensors, however, in this paper only the latest results will be shown, including results owned by the author. Very recently, Li et al [ 47 ] have presented the investigation results of Ru-loaded WO 3 nanoparticles. The sensor response to acetone was promoted by more than 5 times for Ru-loaded sensors comparing with neat WO 3 with low detection limit down to 0.5 ppm.…”

Fast response–recovery time toward acetone by a sensor prepared with Pd doped WO3 nanosheets

“…2d, the lattice spacing values about 0.37, 0.376 and 0.267 nm can be clearly assigned to reections from the (200), (020) and (202) planes of orthorhombic WO 3 , respectively. 27,28 Moreover, HR-TEM images in Fig. 2e for monoclinic 2 at% Pd-WO 3 display a lattice spacing of 0.384 nm, which is attributed to the lattice fringe of the (002) crystal planes of WO 3 .…”