Experimental and computational study of visible light-induced photocatalytic ability of nitrogen ions-implanted TiO2 nanotubes
Zhang Ruijing1, Liu Xiaoli1, Hou Xinggang1, †, Liao Bin2, ‡
       

The optical absorption of TiO2 and I–N-doped TiO2 and S–N-doped TiO2.