McNulty David, Landgraf Victor, Trabesinger Sigita
Battery Electrodes and Cells, Electrochemistry Laboratory, Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen PSI Switzerland
RSC Adv. 2020 Jun 24;10(40):24108-24114. doi: 10.1039/d0ra03693e. eCollection 2020 Jun 19.
Carbon inverse opals (IOs) were prepared a facile synthesis approach using a sucrose-based precursor and polystyrene (PS) spheres as a sacrificial template. During IO preparation, polymer spheres are typically removed by dispersion in organic solvents, such as toluene or tetrahydrofuran. In this study, carbon IOs are prepared with and without removal of PS spheres by toluene to determine the influence of template removal prior to high-temperature treatment on the morphology and chemistry of the resulting carbons. Properties of samples are compared through a systematic investigation by electron microscopy, Fourier-transform infrared spectroscopy and Raman spectroscopy. We demonstrate that a commonly used processing step-polymer sphere template chemical removal-does not make any significant difference to the IO morphology. A correlation of Raman spectroscopy with SEM imaging and TGA analysis indicates that carbon IOs prepared without the solvent-treatment step are more ordered than samples prepared with this processing step. The key finding of this report is the simplified IO synthesis procedure, which can be adapted to the preparation of IOs of other materials besides carbon.
采用一种简便的合成方法，以蔗糖基前驱体和聚苯乙烯（PS）球作为牺牲模板制备了碳反蛋白石（IO）。在制备IO的过程中，聚合物球通常通过分散在甲苯或四氢呋喃等有机溶剂中去除。在本研究中，制备了去除和未去除PS球的碳IO，以确定高温处理前模板去除对所得碳的形态和化学性质的影响。通过电子显微镜、傅里叶变换红外光谱和拉曼光谱的系统研究比较了样品的性质。我们证明，常用的处理步骤——聚合物球模板化学去除——对IO形态没有显著影响。拉曼光谱与扫描电子显微镜成像和热重分析的相关性表明，未经过溶剂处理步骤制备的碳IO比经过该处理步骤制备的样品更有序。本报告的关键发现是简化的IO合成程序，该程序可适用于除碳以外的其他材料IO的制备。
