Abstract The mass fabrication of heteroatom-doped 3D hierarchical porous carbon nanosheets plays an important role in developing high-performance supercapacitor electrode materials and dye adsorbent. In this work, a simple and feasible explosion-assisted strategy was proposed, in which only glucose and magnesium nitrate were used as a reactant to fabricate a series of heteroatom-doped 3D hierarchical porous carbon nanosheets (HPCNS) on a large scale. The obtained HPCNS-1.0 possesses abundant porous structure as well as an ultrahigh oxygen content (16.08 at. %) and an outstanding specific surface area (SSA, 1378 m2 g−1). As an active electrode material, the specific capacitance for HPCNS-1.0 is 253 F g−1 at the current density of 1 A g−1 and 168 F g−1 at 20 A g−1, demonstrating its high rate capability (66%). The specific capacitance only loses 1.3% after 5000 cycles at 10 A g−1, indicating its outstanding cycle stability. As an adsorbent for dye adsorption, the HPCNS-1.0 shows good adsorption capability towards various types of dyes, especially methylene blue with the uptake of 561 mg g−1 at 25 °C. Our work provides a cheap and efficient way to develop high performance 3D hierarchical porous heteroatom-doped carbon nanosheets on a large scale.

中文翻译：

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通过爆炸辅助策略大规模制备氧和氮共掺杂的 3D 分级多孔碳纳米片用于超级电容器和染料吸附应用

摘要 杂原子掺杂的 3D 分级多孔碳纳米片的大规模制备对于开发高性能超级电容器电极材料和染料吸附剂具有重要作用。在这项工作中，提出了一种简单可行的爆炸辅助策略，其中仅使用葡萄糖和硝酸镁作为反应物来大规模制造一系列杂原子掺杂的 3D 分层多孔碳纳米片（HPCNS）。获得的 HPCNS-1.0 具有丰富的多孔结构以及超高的氧含量 (16.08 at. %) 和出色的比表面积 (SSA, 1378 m2 g-1)。作为活性电极材料，HPCNS-1.0 的比电容在 1 A g-1 的电流密度下为 253 F g-1，在 20 A g-1 下的比电容为 168 F g-1，证明其高倍率能力（66% ）。比电容只减1。10 A g-1 下 5000 次循环后为 3%，表明其出色的循环稳定性。作为染料吸附的吸附剂，HPCNS-1.0 对各种类型的染料表现出良好的吸附能力，尤其是亚甲蓝，在 25 °C 时的吸附量为 561 mg g-1。我们的工作为大规模开发高性能 3D 分层多孔杂原子掺杂碳纳米片提供了一种廉价而有效的方法。