Fabrication of porous 3D flower-like Ag/ZnO heterostructure composites with enhanced photocatalytic performance

Hierarchical Ag-ZnO Microspheres with Enhanced Photocatalytic Degradation Activities

“…In contrast, at higher Ag content, some Ag particles might reversibly act as the recombination centers of electrons and holes and thus reduce the photocatalytic efficiency of the catalyst. Similar results are also observed in the literature [20,40].…”

“…When the Ag content exceeds a certain amount (>10.03 wt%), an abnormal change occurs. This can be ascribed to the absorption or reflection of emission at the Ag/ZnO interface, which is induced by the strong surface plasmon absorption of Ag particles [27,40]. Among all the samples, 10.03wt% Ag/ZnO shows the lowest intensity of PL, indicating the highest separation efficiency of photogenerated electronhole pairs.…”

ZnO AND Ag-ZnO CRYSTALS: SYNTHESIS, CHARACTERIZATION, AND APPLICATION IN HETEROGENEOUS PHOTOCATALYSIS

“…These results indicate that the surface modification of ZnO with silver was satisfactory, since the presence of this metal decreases the formation temperature to 400 °C and approximately doubles the surface area of the semiconductor oxide. So, the presence of silver on the ZnO surface increased the specific surface area in this work, meanwhile Liang et al 12 observed a decrease of around 30% in the synthesis of porous 3D flower-like Ag/ ZnO composites at 300 °C during 2 h. Our results using Ag-ZnO at 400 °C presented larger surface area in comparison to ZnO obtained at 600 °C (6.25 m 2 g -1…”

“…Zhai et al 11 reported the meaningful enhancement of the ZnO photocatalytic activity in the presence of silver (Ag-ZnO) for the Rhodamine B dye degradation under solar light. Liang et al 12 also verified the photocatalytic activity increase for the Ag/ZnO in comparison to the ZnO and TiO 2 commercial in order to degrade the Rhodamine B under UV irradiation. Bouzid et al 13 presented the ZnO photocatalytic activity in the presence of different silver percentages, whose best results for the methylene blue degradation took place to that containing 1% Ag after 150 min UV irradiation.…”

Photocatalytic Decolorization of Dye with Self-Dye-Sensitization under Fluorescent Light Irradiation

“…Figure S2 illustrates the XRD of ZnO. Three main distinct peaks at 31.76 • , 34.42 • , and 36.26 • are observed in the patterns, which are indexed to the (100), (002), and (101) diffractions of the wurtzite ZnO, respectively [13]. The particle size of the TiO 2 and ZnO have been obtained from the full width at half maximum (FWHM) of the most intense peaks of the respective crystals using the Scherrer equation, D = 0.9λ/βcosθ, where λ is the X-ray wavelength, D the average crystallite size, θ the Bragg diffraction angle, and β the full width at half-maximum.…”