In this study, a visible-light-driven P25 TiO2 was prepared upon surface modification with a colored organic hybrid of phosphotungstic acid that makes titanium dioxide suitable for photocatalytic degradation of organic pollutants under visible and sunlight irradiation. Visible shifting of the photocatalytic activity of surface-modified TiO2 was examined by studying the decolorization of methylene blue (MB) and rhodamine B (RhB). The results show that colored TiO2 is, unlike bare TiO2, a good photocatalyst in the degradation of dyes under visible and sunlight irradiation. Surface-modified Al2O3 and reduced graphene oxide (RGO) with organic hybrid of phosphotungstate failed to degrade RhB under sunlight irradiation, which prove the role of TiO2 in the photochemical process.

中文翻译：

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磷钨酸盐有机杂化物表面改性后 P25 TiO2 纳米颗粒的光催化活性向可见光区域转移

在这项研究中，通过用磷钨酸的有色有机杂化物进行表面改性制备了可见光驱动的 P25 TiO2，使二氧化钛适合在可见光和阳光照射下光催化降解有机污染物。通过研究亚甲蓝 (MB) 和罗丹明 B (RhB) 的脱色，研究了表面改性 TiO2 光催化活性的可见变化。结果表明，与裸 TiO2 不同，有色 TiO2 是一种良好的光催化剂，可在可见光和日光照射下降解染料。表面改性的 Al2O3 和具有磷钨酸盐有机杂化物的还原氧化石墨烯 (RGO) 在阳光照射下未能降解 RhB，这证明了 TiO2 在光化学过程中的作用。