27595
Formation Mechanism of TiO 2 Nanotubes and Their Applications in Photoelectrochemical Water Splitting and Supercapacitors .
 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