Reversible switch of wettability of ZnO@stearic acid nanoarray through alternative irradiation and heat-treatment

Construction of Hierarchical Micro/Nanostructured ZnO/Cu–ZnMOFs@SA Superhydrophobic Composite Coatings with Excellent Multifunctionality of Anticorrosion, Blood-Repelling, and Antimicrobial Properties

“…The oxygen vacancies on the ZnO surface easily capture the photogenerated electrons, resulting in a lower probability of electron−hole complexation and, thus, a lower intensity of PL. 39,40 Therefore, the weakening of the intensity of the photoluminescence peak further supports the fact that the increase in temperature not only increases the material's crystallinity but also provides further evidence of the presence of ZnO on the side. As shown in Figure 5a, the WCA of the superhydrophobic ZnO/Cu−ZnMOFs@SA (140 °C) composite coating surface exhibited no significant change with an increase in environmental temperature from 0 to 180 °C; the WCA was above 155°.…”

“…20,60,61 Second, due to the oxygen vacancy defect on the surface of ZnO/Cu−ZnMOFs composite coatings, the defect energy level is formed in the band gap of the coating, which greatly expands the absorption range of hierarchical micro/nanostructures. 39,62 The production of reactive oxygen species can be demonstrated by room temperature photoluminescence spectroscopy (Figure 4f). Thus, more electrons and holes are formed in the coating under ultraviolet irradiation, and more reactive oxygen species are easily generated in the water and oxygen environments.…”

Ferroelectric LaxFe0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

“…ZnO is a typical semiconductor, with excellent photoelectric and piezoelectric properties. − In its crystal lattice, other metal ions are easily introduced, which occupy the off-center positions, and a large amount of permanent dipoles and ferroelectric effect are produced in ZnO crystal lattice. , Combing the excellent photoelectric property with ferroelectric effect, the ZnO is an ideal material for TENGs. , Thus, in the paper, the La x Fe 0.1– x codoped ZnO nanorod arrays on a Zn substrate were prepared by simple hydrothermal method, and Fe 0.05 La 0.05 codoped ZnO nanorod arrays exhibit optimal dielectric and ferroelectric properties. When it has been applied into the TENGs, the output current density is greatly improved.…”

Reversible Superwetting Transition Between Superhydrophilicity and Superhydrophobicity on a Copper Sheet, and Its Corrosion Performance

“…With the rapid development of the smart surface with controlled wetting behavior, reversible superwetting transition between superhydrophobicity and superhydrophilicity has received particular attention (Ding et al, 2018;Wan et al, 2018;Brehm et al, 2020;Zhao et al, 2020). UV irradiation (Li et al, 2013;Yang et al, 2017;Jiang et al, 2019), pH (Yu et al, 2005;Chen et al, 2017;Cheng et al, 2019), electric field (Idriss et al, 2020), and heat treatment (Wang et al, 2021) are widely reported as external stimuli for achieving wettability transition in many literatures. Among the mentioned external stimuli, UV has been extensively employed, because some photocatalytic materials, such as ZnO, TiO 2 , and SnO 2 , can realize wettability transition under UV irradiation (Velayi and Norouzbeigi, 2019).…”