Using Pb-doped ZnO nanoparticles as dye pollution removal under visible irradiation

Document Type : Original Article



Zn1-xPbxO nanoparticles (NPs) (x = 0, 0.02, 0.04, and 0.06) were synthesized using a sol–gel method in gelatin media. Long-chain gelatin compounds were utilized to terminate the growth of ZnO-NPs and to stabilize them. The ZnO-NPs were characterized by a number of techniques such as X-ray diffraction diffractometer (XRD), UV-visible, and Raman spectrometers. The XRD patterns indicated a hexagonal (wurtzite) structure for the all samples. Transmission electron microscopy (TEM) Transmission electron microscopy (TEM) showed NPs with nearly spherical shapes, with sizes from 42 to 55 nm for the case of high Pb concentration and undoped ZnO NPs, respectively. The UV-vis results showed a red shift for the band gap of the Pb-doped ZnO NPs in compared to the undoped ZnO NPs. The Raman results confirmed the XRD results and showed a high quality crystalline structures for the all samples. Finally, the obtained products were used as photocatalysts under visible-light irradiation to remove methylene blue (MB) dye.