The photocatalytic degradation of phenol under solar irradiation using microwave-assisted Ag-doped ZnO nanostructures

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

“…The quenching of the ZnO exciton emission, when hybridization with noble metal such as Ag NPs, has been observed in previous studies and attributed to the effective separation of the photo-generated electron-hole pairs, at the Ag /ZnO interface [26,27,34,37,55]. Schottky barrier can be formed at the metal/semiconductor interface, and Ag metal can trap the excited electrons in the ZnO conduction band, and hence reducing the rate of radiative recombination of the photoexcited charge carriers [26,33,37,55].…”

“…Moreover, many reported studies have shown that ZnO modified with appropriate dopants (such as rare-Earth (RE) elements and noble metals) can exhibit improved properties compared to the pristine ZnO in different applications [8][9][10][11][12][13][14][15]. For example, the photocatalytic properties of ZnO nanoparticles have been enhanced upon doping with europium ions (Eu 3+ ) [16][17][18], erbium ions (Er 3+ ) [19][20][21][22][23][24][25], and by hybridization with selected noble metal such as silver (Ag) [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. The observed effective separation of the photo-generated charges in ZnO has been attributed to the electron-scavenger effect of the noble metal [26] and the point defects introduced by RE-doping [23].…”

“…In addition, the Ag NPs could act as electrons traps at the metal/semiconductor (Ag/ZnO) Schottky barrier interface, reducing the charges-recombination rate [26,27,33,37,55], as revealed by the PL spectra, and enhancing of the photocatalytic response of ZnO NPs in hybrid Ag/ZnO and Ag/Er:ZnO NPs colloidal samples. Thus, the accumulated effects of the Er-doping and adding Ag NPs obviously enhance the photocatalytic performance of ZnO nanoparticles in the hybrid Ag/Er:ZnO colloidal NPs sample.…”

Adsorption behavior of different cresols on bismuthene: a DFT study

“…[16][17][18] Monolayer materials, characterized by numerous operative sites and greater region, are considered excellent adsorptive material in favor of water medication. Ghafry et al 19 Examined the photochemical breakdown of phenol using nanomaterials of ZnO doped with Ag, revealing that even a minor Ag doping enhances the photocatalytic efficiency of ZnO nanomaterials. Albedah et al 20 investigated the adherence of phenol from industrial wastewater on two-dimensional substances (ZrS 3 , CdS 2 , SnS 2 , MoS 2 ) using particle simulation.…”