Here, we report a sustainable catalytic process operating on CeO₂–TiO₂ nanoparticle-grafted gC₃N₄ sheets (gC₃N₄/CeO₂–TiO₂) in the presence of a H₂O₂ green oxidant for the liquid phase oxidation of cyclohexane to produce KA oil (cyclohexanone + cyclohexanol). The process achieved enhanced cyclohexane conversion (62%) toward 95% KA oil (cyclohexanone 83% + cyclohexanol 12%), which is the highest ever reported to the best of our knowledge. The excellent catalytic behavior of gC₃N₄/CeO₂–TiO₂ in the present study due to its enhanced active sites, that is, Ce³⁺ and Ti³⁺, is facilitated by the redox reaction between CeO₂–TiO₂ and gC₃N₄ sheets. The high stability of gC₃N₄/CeO₂–TiO₂ catalyst in the liquid phase reaction study indicates the robust nature of this catalyst facilitated by strong interactions between CeO₂–TiO₂ species and electron-rich sites (N and π) of gC₃N₄ sheets. The overall study suggests that the gC₃N₄/CeO₂–TiO₂ material can be a promising catalyst for the sustainable production of KA oil from cyclohexane oxidation in the presence of the H₂O₂ oxidant.

中文翻译：

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CeO2–TiO2 纳米颗粒接枝 gC3N4 片作为环己烷氧化成 KA 油的高效催化剂

在这里，我们报告了在液相H ₂ O ₂绿色氧化剂存在下，在 CeO ₂ –TiO ₂纳米颗粒接枝的 gC ₃ N ₄片 (gC ₃ N ₄ /CeO ₂ –TiO ₂ )上运行的可持续催化过程环己烷氧化生成KA油（环己酮+环己醇）。该工艺提高了环己烷转化率 (62%) 至 95% KA 油（环己酮 83% + 环己醇 12%），这是据我们所知报道的最高水平。_{gC 3} N ₄ /CeO ₂ –TiO ₂优异的催化性能在本研究中，由于其增强的活性位点，即 Ce ³⁺和 Ti ^{3+ ，由 CeO} ₂ –TiO ₂和 gC ₃ N ₄片之间的氧化还原反应促进。gC ₃ N ₄ /CeO ₂ –TiO ₂催化剂在液相反应研究中的高稳定性表明，CeO ₂ –TiO ₂物种与富电子位点（N 和 π）之间的强相互作用促进了该催化剂的稳健性gC ₃ N ₄张。总体研究表明，gC ₃ N ₄/CeO ₂ –TiO ₂材料可以成为在H ₂ O ₂氧化剂存在下从环己烷氧化可持续生产KA油的有前途的催化剂。