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            ______             __   __   _    _   
  ____     /_   _//     ___    \ \\/ // | || | || 
 |    \\    -| ||-     /   ||   \ ` //  | || | || 
 | [] ||    _| ||_    | [] ||    | ||   | \\_/ || 
 |  __//   /_____//    \__ ||    |_||    \____//  
 |_|`-`    `-----`      -|_||    `-`'     `---`   
 `-`                     `-`

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Text this: Photocatalytic degradation of methylene blue by C<inf>3</inf>N<inf>4</inf>/ZnO: The effect of the melamine/ZnO ratios