Journal
MATERIALS LETTERS
Volume 64, Issue 24, Pages 2696-2699Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2010.09.011
Keywords
Porous carbon; Microstructure; Porosity; Carbonization
Funding
- National Natural Science Foundation of China [50972117, 50835007, 51002114, 10872157]
- National Basic Research program of China [2006CB601202]
- National 111 Project of China [B06024]
- 13115 project of Shaanxi Province
- Guangzhou Science and Technology Planning Project [08A44041433]
- Postdoctorial Science Foundation of China [20100470089]
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A hierarchical macroporous carbon derived from phenol-formaldehyde (PF) resin was processed using ethylene glycol (EG) and starch as double porogens. The influences of carbonization temperature on morphological properties and pore microstructure of the porous carbon were investigated, and the formations of hierarchical macropores were analyzed. Obtained results demonstrated that both the carbonization temperature and the composition of the resin and the two porogens played key roles in determining the pore morphology and properties. Under certain conditions, a series of hierarchical macroporous carbons having relatively big macropores of diameter 10-40 mu m and relatively small macropores of diameter 0.5-2 mu m can be obtained. The formations of the big and small macropores can be attributed to the pyrolysis of starch and the phase separation of resin-rich and glycol-rich phases, respectively. (C) 2010 Elsevier B.V. All rights reserved.
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