10247
Surfactant - free ( calcined ) and surfactant - templated ( non - calcined ) mesoporous silica have been used as IP and OP starting matrices , respectively .
 Chemical: silica
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: silica