Flower-like porous carbon has fascinated significant attention due to its outstanding and exceptional properties. However, controlled synthesis of porous carbon with adjustable morphology, highly active sites and cross-linked pore channels remains still a great challenge. Herein, an inimitable dissolution–reassembly anisotropic growth strategy was firstly demonstrated for the fabrication of idiographic orchid-like hierarchical porous carbon with ultra-thin multilayer carbon sheets, high specific surface area (1063 m2 g−1), large pore volume (0.82 cm3 g−1) and rich nitrogen content (7.6 wt%). Highly reactive phloroglucinol and EDA aggregated magically and SiO2 acted as a pore former. Ingeniously, acetone acted as a “surgical knife,” which cut the composite of SiO2@phloroglucinol–EDA into many tiny units and further anisotropic growth into orchid-like polymers. The width and thickness of the carbon petals can be effectively controlled with the diversification of acetone concentration. Intriguingly, monodisperse hollow carbon nanospheres could be harvested with silicon-deficient system, which may offer new insight into the construction of functionalized carbon materials with hollow architecture. Owing to the unmatched superstructures, orchid-like carbon materials can be employed as an ideal drug carrier and dye adsorbent. Figure Schematic illustration of solid carbon nanosphere, hollow carbon nanosphere and OHPC-25. For the first time, a novel dissolution–reassembly route based on strong hydrogen-bonding interaction was developed to prepare unique orchid-like hierarchical porous carbon, in which phloroglucinol acted as a carbon precursor and EDA both as a base catalyst and as a nitrogen precursor. The critical step to this synthetic approach was the ingeniously employed acetone as a “surgical knife” to cut the composite of SiO2@phloroglucinol–EDA into many tiny units, and these units were reassembled into orchid-like polymers. After adding acetone, the morphology of carbon materials has changed from solid nanospheres to hollow nanospheres. This strategy did not use any template as the cavity, which may offer a new insight into the comprehension of synthesized functionalized carbon materials with hollow architecture.

中文翻译：

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兰花状氮掺杂分级多孔碳和空心碳纳米球的可控制备

花状多孔碳由于其突出和卓越的特性而引起了极大的关注。然而，可控合成具有可调节形态、高活性位点和交联孔道的多孔碳仍然是一个巨大的挑战。在此，首次展示了一种独特的溶解-重组各向异性生长策略，用于制备具有超薄多层碳片、高比表面积（1063 m2 g-1）、大孔体积（0.82 cm3 g-1) 和富氮含量 (7.6 wt%)。高反应性间苯三酚和 EDA 神奇地聚集在一起，而 SiO2 起到了成孔剂的作用。巧妙地，丙酮充当了“手术刀，”，它将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，并进一步各向异性生长成兰花状聚合物。通过丙酮浓度的多样化，可以有效控制碳花瓣的宽度和厚度。有趣的是，单分散的空心碳纳米球可以用缺硅系统收获，这可能为构建具有空心结构的功能化碳材料提供新的见解。由于具有无与伦比的超结构，兰花状碳材料可用作理想的药物载体和染料吸附剂。图 实心碳纳米球、空心碳纳米球和 OHPC-25 示意图。首次，开发了一种基于强氢键相互作用的新型溶解-重组途径来制备独特的兰花状分级多孔碳，其中间苯三酚作为碳前体，EDA 作为碱催化剂和氮前体。这种合成方法的关键步骤是巧妙地使用丙酮作为“手术刀”将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，然后将这些单元重新组装成兰花状聚合物。加入丙酮后，碳材料的形态由实心纳米球变为空心纳米球。该策略不使用任何模板作为腔体，这可能为理解具有中空结构的合成功能化碳材料提供新的见解。其中间苯三酚作为碳前体，EDA 作为碱催化剂和氮前体。这种合成方法的关键步骤是巧妙地使用丙酮作为“手术刀”将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，然后将这些单元重新组装成兰花状聚合物。加入丙酮后，碳材料的形态由实心纳米球变为空心纳米球。该策略不使用任何模板作为腔体，这可能为理解具有中空结构的合成功能化碳材料提供新的见解。其中间苯三酚作为碳前体，EDA 作为碱催化剂和氮前体。这种合成方法的关键步骤是巧妙地使用丙酮作为“手术刀”将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，然后将这些单元重新组装成兰花状聚合物。加入丙酮后，碳材料的形态由实心纳米球变为空心纳米球。该策略不使用任何模板作为腔体，这可能为理解具有中空结构的合成功能化碳材料提供新的见解。这种合成方法的关键步骤是巧妙地使用丙酮作为“手术刀”将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，然后将这些单元重新组装成兰花状聚合物。加入丙酮后，碳材料的形态由实心纳米球变为空心纳米球。该策略不使用任何模板作为腔体，这可能为理解具有中空结构的合成功能化碳材料提供新的见解。这种合成方法的关键步骤是巧妙地使用丙酮作为“手术刀”将 SiO2@间苯三酚-EDA 的复合材料切割成许多微小的单元，然后将这些单元重新组装成兰花状聚合物。加入丙酮后，碳材料的形态由实心纳米球变为空心纳米球。该策略不使用任何模板作为腔体，这可能为理解具有中空结构的合成功能化碳材料提供新的见解。