Synthesis and NO2 sensing performances of CuO nanoparticles loaded In2O3 hollow spheres

Electrospun Cu-doped In2O3 hollow nanofibers with enhanced H2S gas sensing performance

“…2 O 3 based on the cubic crystal structure (space group, la 3 ) reveals that the final agreement factors converge to R p 10.5%, R wp 11.8%, and R exp 4.55% (Fig.2(c)). The lattice constant decreases monotonously with the Cu doping concentration increasing (Fig.2(d)), and the similar results were reported[35,36]. The above results indicate that a large portion of Cu 2+ ions is doped into the In 2 O 3 lattice and a small portion is applied to generate CuO.The SEM images of pristine In 2 O 3 and x%Cu-In 2 O 3 hollow nanofibers indicate the hollow structure, as shown in Fig.…”

“…4(b)) reveals that the lattice fringe spacings of 0.29 and 0.41 nm correspond to the (222) and (211) crystal planes of In 2 O 3 , respectively. Based on the previous reports [27,36], the crystal plane corresponding to a lattice fringe spacing of 0.25 nm is the CuO (002). The SADE pattern (Fig.…”

Low concentration isopropanol gas sensing properties of Ag nanoparticles decorated In2O3 hollow spheres

“…As shown in Fig. 7(a), O, C, In, and Ag elements were identified in the XPS survey, and no obvious impurity peaks appeared, indicating that the [42]. In the O 1s spectra of Fig.…”

“…In the O 1s spectra of Fig. 7(c), the peaks at 531.1 and 529.5 eV correspond to the oxygen vacancy and lattice oxygen, respectively [42]. From Fig.…”

“…In general, increasing the Ag at% (< 5 at%) is beneficial for producing more active sites and expanding the electron depletion layer of the sensor. However, excessive Ag clusters on the surface will decrease the number of chemical adsorption sites and thicken the hollow sphere shell, which is not conducive to the spread of gas molecules [42,63]. So the sensor response begins to decrease after the Ag/In atomic ratio exceeds 5%.…”