Improved Visible Light Photocatalytic Activity of CdSe Modified TiO2 Nanotube Arrays with Different Intertube Spaces

CdTe and graphene co-sensitized TiO2nanotube array photoanodes for protection of 304SS under visible light

“…Thus, many efforts have been made to sensitize TiO 2 as a visible light absorber with a semiconductor that has a narrow band gap (e.g. SnO 2 [2,3], WO 3 [4,5], CdS [6][7][8][9][10], CdSe [10][11][12][13], Bi 2 S 3 [14][15][16], ZnS [17][18][19][20][21], ZnSe [22], PbS [23][24][25], PbSe [26,27], ZnTe [28,29] and so on). Among the most widely used narrow-band-gap semiconductor sensitizers, CdTe has shown a great potential for modifying TiO 2 because CdTe has an high optical absorption coefficient (>10 4 cm −1 ) and nearly ideal band gap of about 1.5 eV, matching the better range of the solar spectrum.…”