Characterization of the Pore Structure of Three-Dimensionally Ordered Mesoporous Carbons Using High Resolution Gas Sorption

被引:84
作者
Cychosz, Katie A. [2 ]
Guo, Xuefeng [3 ]
Fan, Wei [3 ]
Cimino, Richard [1 ]
Gor, Gennady Yu. [1 ]
Tsapatsis, Michael [3 ]
Neimark, Alexander V. [1 ]
Thommes, Matthias [2 ]
机构
[1] Rutgers State Univ, Piscataway, NJ 08854 USA
[2] Quantachrome Instruments, Boynton Beach, FL 33426 USA
[3] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
关键词
DENSITY-FUNCTIONAL THEORY; CAPILLARY CONDENSATION; HYDROTHERMAL SYNTHESIS; ADSORPTION HYSTERESIS; SCANNING BEHAVIOR; NITROGEN; CONNECTIVITY; CRYSTALS;
D O I
10.1021/la302362h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The use of colloidal crystals with various primary particle sizes as templates leads to the formation of three-dimensionally ordered mesoporous (3DOm) carbons containing spherical pores with tailorable pore size and extremely high pore volumes. We present a comprehensive structural characterization of these novel carbons by using nitrogen (774 K) and, argon (87.3 K) adsorption coupled with the application of novel, dedicated quenched solid density functional theory (QSDFT) methods which assume correctly the underlying spherical pore geometry and also the underlying adsorption mechanism. The observed adsorption isotherms are of Type IV with Type Hi like hysteresis, despite the fact that pore blocking affects the position of the desorption branch. This follows also from detailed, advanced scanning hysteresis experiments which not only allow one to identify the underlying mechanisms of hysteresis, but also provide complementary information about the texture of these unique porous materials. This work addresses the problem of pore size analysis of novel, ordered porous carbons and highlights the importance of hysteresis scanning experiments for textural analysis of the pore network.
引用
收藏
页码:12647 / 12654
页数:8
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