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首页> 美国卫生研究院文献>Nanomaterials >N S Dual-Doped Carbon Derived from Dye Sludge by Using Polymeric Flocculant as Soft Template
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N S Dual-Doped Carbon Derived from Dye Sludge by Using Polymeric Flocculant as Soft Template

机译：以高分子絮凝剂为软模板的染料污泥衍生的NS双掺杂碳

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Dye sludge is a major by-product and it will bring critical environmental problems in the textile industry. In this study, dicyandiamide formaldehyde resin (DFR) is used as an effective flocculating agent for the removal of anionic dyes from textile dye wastewater. Employing dye-contaminated sewage sludges as precursors, N, S dual-doped carbon materials are successfully synthesized by using DFR as a soft template. The specific surface area, morphology, and pore structure of the resulting annealed products can be easily controlled by changing the DFR content of the dye sludge. The oxygen reduction reaction performance of optimal carbon material (N, S-DF-2) is close to commercial 20% Pt/C in alkaline medium, including onset potential (0.98 V), half-wave potential (0.82 V), as well as limiting current density (5.46 mA·cm−2). Furthermore, it also shows better durability and crossover resistance. In addition, N, S-DF-2 exhibits a large specific capacitance (230 F·g−1 at 1 A·g−1) and super capacitance retention (nearly 98% at 10 A·g−1) after 2500 cycles as supercapacitors electrodes. This work opens up a new method to take full advantage of organic polymeric flocculant as a soft template to prepare N, S dual-doped carbon materials, which will be beneficial for the reuse and recycling of sewage sludge, as well as for the production of good quality energy conversion and storage materials.
机译：染料污泥是主要的副产物，它将在纺织工业中带来严重的环境问题。在这项研究中，双氰胺甲醛树脂（DFR）被用作从纺织染料废水中去除阴离子染料的有效絮凝剂。以染料污染的污泥为前驱体，以DFR为软模板成功合成了N，S双掺杂碳材料。通过改变染料污泥的DFR含量，可以容易地控制所得退火产物的比表面积，形态和孔结构。最佳碳材料（N，S-DF-2）在碱性介质中的氧还原反应性能接近20％Pt / C，包括起始电势（0.98 V），半波电势（0.82 V）作为极限电流密度（5.46 mA·cm -2 ）。此外，它还显示出更好的耐久性和抗交叉性。另外，N，S-DF-2表现出较大的比电容（在1 A·g -1 时为230 F·g -1 ）和超级电容保持力（接近2500次循环后，在10 A·g -1 ）下98％作为超级电容器电极。这项工作开辟了一种新方法，可以充分利用有机高分子絮凝剂作为软模板制备N，S双掺杂碳材料，这将有益于污水污泥的再利用和循环利用，以及废水的生产。优质的能量转换和存储材料。

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