The influence of post-annealing temperatures on XPS, XZ height of nanoparticles, and optical properties of Cu–Al doped ZnO films

Influence of the Chemical Composition of Ceria Conversion Coatings, Sealed in Solution of NaH2PO4 and Ca(NO3)2, on the Corrosion Behavior of Aluminum

“…The first group of peaks, positioned at 529.6-531 eV, we can associate to the presence of chemical bounds of oxygen with metal ions. It can be noted that in the sample order S2 (positioned at 529.6 eV) → S3 (530.4 eV) → S4 (530.8 eV) → S5 (531.0 eV), the binding energy of these peaks gradually increases, which we can associate with the decrease of the concentration of cerium oxide and the increase of the concentration of aluminum oxide [46] on the surface. The second group of peaks positioned at 531.4 are related to the presence of P-O-P-bonds within phosphate groups [51].…”

“…The spectra are deconvoluted into two essential groups of peaks. The first one for samples S2 and S4 at 74.2 eV is attributed to Al 2 O 3 [46]. This peak for sample S3 is slightly shifted at 74.5 eV to higher BE.…”

Estimation and photocatalytic reduction of toxic chromium metal ions from environmental samples by zinc-based nanocomposite

“…[14][15][16] The commonly used semiconductors include Prussian blue analogues, such as zinc hexacyanocobaltate (ZnHCC), a p-type semiconductor with a bandgap that can be adjusted between 1.5-2.0 eV. 17 Its unusual electronic structure, moderate bandgap, outstanding stability, and physiological chemical characteristics make it an intriguing visible-light-driven photocatalyst. 18 However, the activity of a single metal oxide is limited by the drawbacks of inadequate light capture and facile mixing of the carriers produced by photons.…”

“…Therefore, coupling ZnO nanocomposites to increase their photocatalytic activity is necessary for applications in the real world. 17,24,25 Coupling and hetero-junction building are two methods used to boost the photocatalytic activity of ZnHCC. 26,27 To stop photoinduced electron-hole pairs from recombining, heterojunction construction is one proven method.…”

“…26,27 To stop photoinduced electron-hole pairs from recombining, heterojunction construction is one proven method. 17 The robust redox ability of electrons and holes is maintained in particular by Z-scheme heterojunctions, which simultaneously facilitate the movement of photoproduced carriers. 28,29 For this reason, it is crucial to enhance the photocatalytic ability of ZnHCC through the careful construction of a Z-scheme bi-junction by connecting a suitable semiconductor with ZnO.…”