13869
Photocatalytic properties of graphdiyne and graphene modified TiO 2 : from theory to experiment .
 Chemical: graphdiyne; Chemical: graphene; 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: graphdiyne; Chemical: graphene; Chemical: TiO 2