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Boosting Electrical Conductivity of Sugarcane Cellulose and Lignin Biocarbons through Annealing under Isopropanol Vapor
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-02 , DOI: 10.1021/acssuschemeng.0c00320 Ana Claudia Fingolo 1 , Jefferson Bettini 1 , Manoella da Silva Cavalcante 1 , Mariane Peres Pereira 1 , Carlos César Bof Bufon 1, 2, 3 , Murilo Santhiago 1, 4 , Mathias Strauss 1, 4
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-02 , DOI: 10.1021/acssuschemeng.0c00320 Ana Claudia Fingolo 1 , Jefferson Bettini 1 , Manoella da Silva Cavalcante 1 , Mariane Peres Pereira 1 , Carlos César Bof Bufon 1, 2, 3 , Murilo Santhiago 1, 4 , Mathias Strauss 1, 4
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Annealing of sugarcane bagasse cellulose or lignin biocarbons under isopropanol vapor has induced an improvement in electrical conductivity of these materials. Remarkably, the sheet resistance dropped nearly three times for lignin biocarbon treated with isopropanol vapors. The use of isopropanol vapor annealing has increased sp2 carbon and decreased oxygenated functionality contents of these biocarbons. These chemical changes were confirmed by X-ray photoelectron and Raman spectroscopy analyses. Transmission electron microscopy images revealed the formation of graphitic domains on samples pyrolyzed in the presence of isopropanol, while electron energy loss spectroscopy mapping at a nanoscale showed an increase in graphitic characteristics of the particles. These chemical and structural changes of biocarbons have improved their electrical conductivity and decreased sheet resistance values of conductive tracks prepared with such materials. As a proof of concept, we fabricated flexible electronic circuits and paper-based electrochemical devices using conductive lignin-based inks prepared with our method.
中文翻译：
在异丙醇蒸气下退火提高甘蔗纤维素和木质素生物碳的电导率
在异丙醇蒸汽下对甘蔗渣纤维素或木质素生物碳进行退火已诱导了这些材料的电导率提高。值得注意的是，用异丙醇蒸气处理的木质素生物碳的薄层电阻下降了近三倍。异丙醇蒸气退火的使用增加了sp 2碳和这些生物碳的降低的氧化官能度含量。这些化学变化通过X射线光电子和拉曼光谱分析得到了证实。透射电子显微镜图像显示在异丙醇存在下热解的样品上形成了石墨区域，而纳米级的电子能量损失谱图显示了颗粒的石墨特性增加。生物碳的这些化学和结构变化提高了它们的电导率，并降低了用这种材料制备的导电迹线的薄层电阻值。作为概念证明，我们使用通过我们的方法制备的导电木质素基墨水制造了柔性电子电路和纸基电化学装置。
更新日期：2020-04-02
中文翻译：
在异丙醇蒸气下退火提高甘蔗纤维素和木质素生物碳的电导率
在异丙醇蒸汽下对甘蔗渣纤维素或木质素生物碳进行退火已诱导了这些材料的电导率提高。值得注意的是，用异丙醇蒸气处理的木质素生物碳的薄层电阻下降了近三倍。异丙醇蒸气退火的使用增加了sp 2碳和这些生物碳的降低的氧化官能度含量。这些化学变化通过X射线光电子和拉曼光谱分析得到了证实。透射电子显微镜图像显示在异丙醇存在下热解的样品上形成了石墨区域，而纳米级的电子能量损失谱图显示了颗粒的石墨特性增加。生物碳的这些化学和结构变化提高了它们的电导率，并降低了用这种材料制备的导电迹线的薄层电阻值。作为概念证明，我们使用通过我们的方法制备的导电木质素基墨水制造了柔性电子电路和纸基电化学装置。
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