The formation of high-quality hierarchically porous N-doped carbons with multi-scale pores, high specific surface area and large pore volume generally suffers from multistep complicated procedures. It still remains a great challenge to develop facile and effective approaches. Here, a novel three-in-one strategy (synergistic self-templating, self-activation and in-situ N-doping) was designed to fabricate hierarchically porous N-doped carbons (HPNCs) directly, via a one-pot carbonization using ethylenediaminetetraacetic acid tripotassium salt dehydrate (EDTA-3K) as the sole starting material. The as-obtained HPNCs exhibited 3D porous architecture, very high BET surface areas (e.g., 2787 m² g⁻¹), rich porosity and good nitrogen doping amounts, resulting in good CO₂ capture capacity (e.g., 5.80 mmol g⁻¹, at 273 K and 1.0 bar), and tetracycline adsorption ability (e.g., 1092 mg g⁻¹). This discovery can provide a new concept for simply fabricating well-defined and unique functional porous carbons for various applications, such as sensor, energy storage and conversion, adsorption, separation, catalysis, bio-medicine, environmental protection.

具有多尺度的孔，高的比表面积和大的孔体积的高质量的分级多孔的N掺杂碳的形成通常受到多步复杂过程的困扰。发展简便有效的方法仍然是一个巨大的挑战。在这里，一种新颖的三合一策略（协同自模板，自激活和原位N掺杂）被设计为通过使用乙二胺四乙酸的一锅式碳化直接制造分层多孔的N掺杂碳（HPNC）。唯一的原料是酸性三水合硫酸氢钾盐（EDTA-3K）。如此获得的HPNC表现出3D多孔结构，非常高的BET表面积（例如2787 m ²  g ^-1），丰富的孔隙率和良好的氮掺杂量，从而产生了良好的CO ₂捕获能力（例如，在273 K和1.0 bar下为5.80 mmol g ^-1）和四环素的吸附能力（例如1092 mg g ^-1）。这一发现可以提供一个新概念，可以简单地制造出定义明确且独特的功能性多孔碳，以用于各种应用，例如传感器，能量存储和转换，吸附，分离，催化，生物医学，环境保护。