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Intriguingly , these TiO ( 2 ) flower clusters can then be exploited as photoanodes to produce DSSCs , yielding a power conversion efficiency of 2 . 94 % despite their rutile nature , which is further increased to 4 . 07 % upon the TiCl ( 4 ) treatment .
 Chemical: TiO ( 2 ); Chemical: TiCl ( 4 )
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 ); Chemical: TiCl ( 4 )