Morphology Regulation and Doping Modification on the Photocatalytic Properties of TiO2 Catalyst

Abstract

Abstract: In order to improve the photocatalytic activity of TiO₂, mesoporous TiO₂, C/TiO₂, Nd/TiO₂ and C/Nd/TiO₂ were prepared by sol-gel method, and multistage ordered C/Nd/TiO₂ catalyst was prepared using polystyrene (PS) colloidal crystals as template. The properties of the prepared catalysts were analyzed by SEM, XRD, XPS, UV-Vis DRS and N₂ adsorption-desorption. The photocatalytic properties of the prepared catalyst materials for methyl orange solution were investigated under simulated visible light conditions. The results show that the surface morphology of the anatase type of multistage orderly C/Nd/TiO₂ catalyst is arranged in order, and internal is the cross linking pore structure. Macroporous structure shows the hexagonal structure to produce good openness. Larger specific surface area and pore volume provide a larger space for mass transfer. Through the synergistic effect of non-metal C and rare earth metal Nd, the band gap of multistage orderly C/Nd/TiO₂ is narrowed, which reveals good catalytic activity. As a result, the photocatalytic decolorization rate of multistage ordered C/Nd/TiO₂ catalyst is up to 81.15% at illumination 210 min.

Key words: sol-gel, polystyrene, visible light, synergistic effect, band gap

CLC Number:

O611
O643.36

WANG Dandan, LIU Wenqiang, ZHAO Lin, LI Chao, LI Shijie. Morphology Regulation and Doping Modification on the Photocatalytic Properties of TiO₂ Catalyst[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(5): 824-832.

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Morphology Regulation and Doping Modification on the Photocatalytic Properties of TiO₂ Catalyst

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