The development of a facile, low-cost, and eco-friendly approach to the synthesis of aromatic amines remains a great scientific challenge. TiO₂, as a low-cost and earth abundant metal oxide, is usually not active for thermo-catalyzed nitro reduction. Herein, we report a composite nanosheet catalyst, composed of nitrogen-doped TiO₂ and carbon (N-TiO₂@C), which exhibits highly efficient, thermo-catalytic performance for selective nitroaromatic reduction at room temperature. The N-TiO₂@C nanosheet catalyst is synthesized via a facile approach where C₃N₄ nanosheets are utilized not only as a structure-directing agent to control the shape, size, and crystal phase of TiO₂ but also as a source of nitrogen for doping into both TiO₂ and carbon nanosheets. Furthermore, the origin of the superior performance of the N-TiO₂@C nanosheet composite catalyst, along with a possible nitroaromatic reduction mechanism, has also been explored.

中文翻译：

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氮掺杂TiO ₂ @碳纳米片的设计合成在温和条件下选择性还原硝基芳烃

合成芳族胺的简便，低成本和环保方法的发展仍然是一个巨大的科学挑战。TiO ₂作为一种低成本且富含地球的金属氧化物，通常对热催化的硝基还原没有活性。在本文中，我们报道了一种由掺杂氮的TiO ₂和碳（N-TiO ₂ @C）组成的复合纳米片状催化剂，该催化剂在室温下选择性硝基芳烃还原方面表现出高效的热催化性能。N-TiO ₂ @C纳米片催化剂是通过一种简便的方法合成的，其中C ₃ N ₄纳米片不仅用作结构导向剂来控制TiO ₂的形状，大小和晶相而且还可以作为氮源同时掺杂到TiO ₂和碳纳米片中。此外，还探索了N-TiO ₂ @C纳米片复合催化剂优异性能的起源以及可能的硝基芳族还原机理。