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question on using Titatnium di oxide

Question asked by Sanjit Kannan on Nov 5, 2019
Latest reply on Nov 7, 2019 by Steven Cooke
I am Sanjit Kannan a 5th Grader from May Watts Elementary in Naperville Illinois. I am part of an   FLL team and we are doing a project that involves Titanium Di Oxide(TiO2). 
Our Project involves applying Ti02 on the outside of a billboard that enables the board to catch smog. 
I need some help on the same to understand the process.