3204
In EPD , TiO ( 2 ) nanoparticles were used to enhance the surface energy and create nanoporous structures , while BDA was employed to produce microporous structures .
 Chemical: TiO ( 2 )
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: TiO ( 2 )