关键词: 室内环境污染物, 光催化降解, 二氧化钛, 氧化石墨烯

Abstract:

Objective To investigate the effect of palladium and graphene oxide composite modification on the photocatalytic performance of titanium dioxide. Methods The sol-gel method was employed to prepare a composite photocatalytic nanomaterial of palladium and graphene oxide co-modified titanium dioxide（TiO₂@Pd-GO）. The microstructure，morphology，and other physicochemical properties and catalytic performance of TiO₂@Pd-GO were investigated using various characterization techniques such as XRD，XPS，SEM，and UV-Vis-DRS. The photocatalytic purification performance of the composite nanomaterial was evaluated through degradation experiments of the substrate methyl violet. Results The photoresponsive region of the palladium and graphene oxide-modified material TiO₂@Pd-GO was extended to the visible light range（approximately 620 nm），and the specific surface area was increased to 153.4 m²/g. Under mercury lamp-simulated natural light irradiation，the photocatalytic efficiency of TiO₂@Pd-GO was 30 times higher than that of pure TiO₂. Conclusion The co-modification of titanium dioxide with palladium and graphene oxide significantly enhances the material's photocatalytic efficiency by improving the light absorption range and adsorption properties of titanium dioxide. This research also provides a new approach for the preparation of highly efficient photocatalytic catalysts.

Key words: Indoor environmental pollution, Photocatalytic degradation, Titanium dioxide, Graphene oxide