Amorphous TiO₂ based nanotubes (TN) obtained through alkaline hydrothermal restructuring of P25 were treated with various acids and functionalized with hydrogen peroxide in order to tailor formation of structurally distinctive titanium peroxo species. Obtained solids were used as catalysts in the catalytic wet peroxide oxidation (CWPO) of model methyl orange (MO) aqueous solution under mild conditions. With the usage of 2 g/L of peroxide modified TN/ClO₄p 0.01 catalyst and double stoichiometric amount of hydrogen peroxide, 50 ppm MO solution was purified up to 93% during 1 h at 40°C. No decay of catalyst activity was observed in 5 consecutive runs using the same catalyst batch. ¹⁷O NMR and TPD/MS analyses have revealed that catalytic activity of TN/ClO₄p 0.01 sample can mainly be assigned to bidentate η² surface peroxo species whose amount during 5 consecutive catalytic runs is almost constant, namely 5.9×10⁻⁷ and 5.2×10⁻⁷ mol/m² prior and after usage, respectively. In addition, it has been observed that considerable amount of thermally labile oxygen species is used during 5 consecutive runs. From ¹⁷O NMR analysis we have observed that these species can be attributed to two coordinated (OTi₂) oxygen formed on the place of terminal intra/interlayered −OH groups. Former can serve as structural stabilizing agents which enable formation of new η² surface peroxo species during CWPO runs. To the best of our knowledge, this study is the first attempt to explain the possibility for η² peroxo species structural stabilization during CWPO under mild conditions.

通过P25碱水热重组获得的基于TiO ₂的无定形纳米管（TN）用各种酸处理，并用过氧化氢官能化，以适应结构独特的过氧钛物种的形成。在温和条件下，将获得的固体用作模型甲基橙（MO）水溶液的催化湿式过氧化物氧化（CWPO）的催化剂。通过使用2 g / L的过氧化物改性的TN / ClO ₄ p 0.01催化剂和双化学计量的过氧化氢，在40°C下1 h内，将50 ppm MO溶液纯化至93％。使用相同的催化剂批次，在连续5次运行中未观察到催化剂活性的下降。¹⁷ O NMR和TPD / MS分析表明TN / ClO的催化活性₄ P = 0.01样品可以主要分配给二齿η ²表面过氧物种，其在5个连续运行催化量几乎是恒定的，即5.9×10 ^-7和5.2×10 ^-7摩尔/米²分别使用之前和之后，。另外，已经观察到在连续的5次运行中使用了大量的热不稳定的氧。从¹⁷ O NMR分析，我们发现这些物质可归因于在末端内/层间-OH基团上形成的两个配位（OTi ₂）氧。前者可作为结构稳定化剂，其能够形成新的η ²CWPO运行期间的表面过氧物质。据我们所知，这项研究解释了η可能性的第一次尝试²在温和条件下CWPO期间过氧物种结构稳定性。