Wu Dingcai, Liang Yeru, Yang Xiaoqing, Zou Chong, Li Zhenghui, Lv Guifen, Zeng Xianhua, Fu Ruowen
Materials Science Institute, PCFM Laboratory, School of Chemistry and Chemical Engnieering, and Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, PR BChina.
Langmuir. 2008 Apr 1;24(7):2967-9. doi: 10.1021/la703511z. Epub 2008 Feb 29.
Activated ordered mesoporous carbons with a channel structure (AOMCs-CS) were successfully prepared by imposing CO(2) activation on ordered mesopore carbon C-FDU-15. It is found that the continuous carbon framework of the precursor C-FDU-15 plays an important role in keeping the order structure of the resulting AOMCs-CS. The mild activation (e.g., 31 wt % burnoff) does not impair the order degree. After that, the order degree gradually decreases with further increasing burnoff. However, the basic hexagonal mesostructure of C-FDU-15 can still be found in the AOMCs-CS when the burnoff is up to 73 wt %, although many carbon walls are punched and thus many larger mesopores and marcropores are generated. With increasing burnoff, the surface area and volume of micropores increase first and then decrease, and the surface area and volume of mesopores continuously increase. The highest measured Brunaruer-Emmett-Teller (BET) surface area, micropore volume, and total pore volume of the AOMCs-CS reach 2004 m(2)/g, 0.50 cm(3)/g, and 1.22 cm(3)/g, respectively.
通过对有序介孔碳C-FDU-15进行CO₂活化，成功制备了具有通道结构的活化有序介孔碳（AOMCs-CS）。研究发现，前驱体C-FDU-15的连续碳骨架在保持所得AOMCs-CS的有序结构方面起着重要作用。温和活化（如31 wt%烧失率）不会损害有序度。在此之后，随着烧失率进一步增加，有序度逐渐降低。然而，当烧失率高达73 wt%时，尽管许多碳壁被打通，从而产生了许多更大的介孔和大孔，但在AOMCs-CS中仍能发现C-FDU-15的基本六边形介观结构。随着烧失率的增加，微孔的表面积和体积先增加后减小，介孔的表面积和体积持续增加。所测得的AOMCs-CS的最高布鲁诺尔-埃米特-泰勒（BET）表面积、微孔体积和总孔体积分别达到2004 m²/g、0.50 cm³/g和1.22 cm³/g。
