أرسل هذا في رسالة قصيرة: Photocatalytic activities of Fe-Cu/TiO<inf>2</inf>on the mineralization of oxalic acid and formic acid under visible light irradiation

 _    _    _    _      _____     ___      _  _   
| |  | || | || | ||   / ___//   / _ \\   | \| || 
| |/\| || | || | ||   \___ \\  / //\ \\  |  ' || 
|  /\  || | \\_/ ||   /    // |  ___  || | .  || 
|_// \_||  \____//   /____//  |_||  |_|| |_|\_|| 
`-`   `-`   `---`   `-----`   `-`   `-`  `-` -`