Enhanced sensing performance of TiO2/Ag2V4O11 nanoheterostructures to ethanol gas

Troubleshooting the Limited Zn2+ Storage Performance of the Ag2V4O11 Cathode in Zinc Sulfate Electrolytes via Favorable Synergism with Reduced Graphene Oxides

“…The X-ray powder diffraction (XRD) patterns of as-synthesized Ag 2 V 4 O 11 and Ag 2 V 4 O 11 @rGO-90 samples are shown in Figure a. The XRD pattern demonstrates the crystalline nature of the fabricated materials and matches well with the JCPDS card number 20-1386, corresponding to layered monoclinic Ag 2 V 4 O 11 with the C 2/ m space group. − The crystal structure consists of V 4 O 16 units built from VO 6 distorted octahedral sharing their apexes, which contain infinite V 4 O 16 quadruple strings, and these quadruple strings are further linked by the corner-shared oxygen atoms and thus form [V 4 O 11 ] n layers separated by AgO 5 trigonal bipyramid layers. ,, In the XRD pattern of the composites, no characteristic GO peak at 2θ of ∼10.2° was found, whereas a small hump at 2θ of ∼25.4° appeared, which indicates the reduction of the GO to rGO during the hydrothermal process. The Raman spectra of both Ag 2 V 4 O 11 and Ag 2 V 4 O 11 @rGO-90 showed some identical peaks at ∼209, ∼314, ∼495, ∼673, ∼775, ∼896, and ∼946 cm –1 , respectively, corresponding to Ag 2 V 4 O 11 material (Figure b).…”

In Situ Growth of NiO@SnO2 Hierarchical Nanostructures for High Performance H2S Sensing

“…Moreover, the sensing response of the sensor toward 1 ppm of H 2 S changed less than 3% after one month, indicating good stability and repeatability. The fast response and recovery times may ascribe to much efficient charge transfer process of sensing materials and gas molecules owing to formed p–n heterojunction and the formed thin SnO 2 nanoneedles on the surface of NiO nanowalls can provide more adsorption and desorption sites. − This work shows a higher sensing performance with fast response and recovery times and high sensing response compared with other reported H 2 S sensors based on the NiO–SnO 2 system and NiO- and SnO 2 -based composites in recent years (Table S2).…”

Preparation and NH3 gas-sensing properties of Ag/β-AgVO3 nanorods

“…Thus, the more changes of the depletion layer in nanoheterojunction interfaces and the entire depletion in Ag nanoparticles significantly enhanced the sensing performance of the Ag/β-AgVO 3 NRs film. 59,60…”

“…Thus, the more changes of the depletion layer in nanoheterojunction interfaces and the entire depletion in Ag nanoparticles signicantly enhanced the sensing performance of the Ag/b-AgVO 3 NRs lm. 59,60 Fig. 9 presents the response (S) of the NH 3 gas sensor utilizing Ag/b-AgVO 3 NRs lm to different concentrations of NH 3 under 70% RH at room temperature.…”