26520
In this work , UV - activated visual oxygen indicator films were fabricated using thionine , glycerol , P25 TiO2 , and zein as a redox dye , a sacrificial electron donor , UV - absorbing semiconducting photocatalyst , and an encapsulation polymer , respectively .
 Chemical: oxygen; Chemical: thionine; Chemical: glycerol; Chemical: P25 TiO2
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: oxygen; Chemical: thionine; Chemical: glycerol; Chemical: P25 TiO2