N-Doped Ordered Mesoporous Carbon Originated from a Green Biological Dye for Electrochemical Sensing and High-Pressure CO2 Storage

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• 作者：Shenghai Zhou ; Hongbo Xu ; Qunhui Yuan ; Hangjia Shen ; Xuefeng Zhu ; Yi Liu ; Wei Gan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：8
• 期：1
• 页码：918-926
• 全文大小：530K
• ISSN：1944-8252

文摘

Herein, a series of nitrogen-doped ordered mesoporous carbons (NOMCs) with tunable porous structure were synthesized via a hard-template method with a green biological dye as precursor, under various carbonization temperatures (700–1100 °C). Compared with the ordered mesoporous silica-modified and unmodified electrodes, the use of electrodes coated by NOMCs (NOMC-700–NOMC-1100) resulted in enhanced signals and well-resolved oxidation peaks in electrocatalytic sensing of catechol and hydroquinone isomers, attributable to NOMCs’ open porous structures and increased edge-plane defect sites on the N-doped carbon skeleton. Electrochemical sensors using NOMC-1000-modified electrode were fabricated and proved feasible in tap water sample analyses. The NOMCs were also used as sorbents for high-pressure CO₂ storage. The NOMC with the highest N content exhibits the best CO₂ absorption capacities of 800.8 and 387.6 mg/g at 273 and 298 K (30 bar), respectively, which is better than those of other NOMC materials and some recently reported CO₂ sorbents with well-ordered 3D porous structures. Moreover, this NOMC shows higher affinity for CO₂ than for N₂, a benefit of its higher nitrogen content in the porous carbon framework.