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           __   __   _____     __   __            
  ____     \ \\/ // |  __ \\   \ \\/ //     ___   
 |    \\    \ ` //  | |  \ ||   \ ` //     /   || 
 | [] ||     | ||   | |__/ ||    | ||     | [] || 
 |  __//     |_||   |_____//     |_||      \__ || 
 |_|`-`      `-`'    -----`      `-`'       -|_|| 
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Text this: Photocatalytic degradation of methylene blue by Zn<inf>2</inf>SnO<inf>4</inf>-SnO<inf>2</inf> system under UV visible radiation