Abstract:
In the study, 3D sea urchin TiO
2 with N, Pt co-doped were successfully prepared by hydrothermal method. The material were characterized via XRD, XPS, SEM, TEM, UV-Vis photoelectric performance test. The results show that N, Pt were successful doped into the TiO
2, and N substitutes for the position of the O lattice site in TiO
2, and Pt replaces the Ti lattice. The doping of N and Pt is not only beneficial to the transformation of TiO
2 from the rutile phase to the anatase phase, but also inhibits the growth of its crystals. The N, Pt co-doped TiO
2 are 3D sea urchin spherical structure composed of nanorods with a common center. The size distribution of the spheres is narrow; the diameter is approximately 1—2 μm; and the diameter of the assembled nanorods is approximately 7—8 nm, length about 100—150 nm (SEM,TEM). Moreover, when the doping ratio is 5 to 5, the absorption of the sample in the ultraviolet and visible light reaches the summit, and the UV-Vis absorption edge red shifts to nearly 100 nm. As can be seen from the photoelectric conversion chart and Linear sweep voltammograms that the photoelectric conversion efficiency of the 5to5 doping ratio was as high as 22.4%, 4.48 times higher than that of the pure sea urchin TiO
2 under the influence of specific surface area, bandgap width, crystal shape, number of carriers, and synergy between elements.