In the present study hydrogen peroxide was applied during the synthesis of titanium dioxide (TiO₂) photocatalysts to anchor peroxo groups onto the surface to enhance visible light excitability. The effect of changes in the pH value and crystallization temperature was investigated. As-prepared peroxo-titania were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), infrared spectroscopy (IR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity was investigated using phenol as model contaminant under visible light irradiation. IR and XPS measurements confirmed the presence of peroxo groups in the samples, moreover Raman and XPS measurements showed the formation of amorphous sodium titanate. Photocatalytic activity measurements pointed out, that most efficient as-prepared photocatalyst exceeded the photocatalytic performance of all reference materials. The cause of the enhanced photocatalytic activity was attributed to the enhanced visible light excitability and considerable amount of peroxo groups, which were not stable after the reusability experiments of the photocatalysts, suffering a redox reaction with the relatively high amount of Ti³⁺, resulting Ti⁴⁺ and surface OH groups. Therefore, the loss of peroxo groups and concomitantly photocatalytic activity was observed.

在本研究中，在合成二氧化钛（TiO ₂）将过氧基团锚定在表面上的光催化剂，以增强可见光的兴奋性。研究了pH值和结晶温度变化的影响。通过X射线衍射（XRD），漫反射光谱（DRS），红外光谱（IR），拉曼光谱和X射线光电子能谱（XPS）表征所制备的过氧二氧化钛。使用苯酚作为模型污染物在可见光照射下研究了光催化活性。IR和XPS测量证实了样品中存在过氧基团，此外拉曼和XPS测量显示出无定形钛酸钠的形成。光催化活性的测量结果指出，最有效的制备光催化剂超过了所有参考材料的光催化性能。³⁺，生成Ti ⁴⁺和表面OH基团。因此，观察到过氧基团的丧失和随之而来的光催化活性。