25709
A series of sp ( 2 ) carbon materials with different specific surface area ( SSA ) and controlled pore size distribution ( PSD ) were synthesized at large scale through a facile and low - cost method .
 Chemical: carbon
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: carbon