Preparation of multiple-doped TiO2 nanotube arrays with nitrogen, carbon and nickel with enhanced visible light photoelectrochemical activity via single-step anodization

Effect of Nickel Doping on Phase Transformation of TiO2 Nanotube Arrays

“…Figure d compares the O1s peaks of Ni‐TiO 2 ‐NT and TiO 2 ‐NT. These O1s peaks were fitted into two chemical states, that are O 2− characteristic peak at about 530.0 eV and oxygen vacancy characteristic peak at about 531.5 eV . In the Ni‐doped sample, the peak at 531.64 eV is much stronger than the corresponding peak (531.35 eV) in undoped sample, which confirms the existence of considerable amount of oxygen vacancies.…”

A Review on the Electrochemically Self-organized Titania Nanotube Arrays: Synthesis, Modifications, and Biomedical Applications

“…The most typical doped TiO 2 nanotubes are as follows: Metal-doped TiO 2 nanotubes such as Nb [ 107 ], Fe [ 108 ], Cu [ 109 ], Cr [ 110 ], Zr [ 111 ], Zn [ 112 ], and V [ 113 ] Non-metal-doped TiO 2 nanotubes such as N [ 105 ], F [ 114 ], B [ 115 ], C [ 116 ], S [ 117 ], and I [ 118 ] Co-doped TiO 2 nanotubes such as N–Ta [ 105 ], N–Nb [ 107 ], and C–N–Ni [ 119 ] …”

Synthesis, properties, and applications of black titanium dioxide nanomaterials

“…So far, many approaches have been attempted [21][22][23][24][25]. For example, introducing metal (such as Fe, Co, Cr, Ni, and Mo) [26][27][28][29][30][31][32][33][34][35][36][37], noble-metal (such as Au, Ag, and Pt) [38,39] or non-metal elements (such as N, C, F, and S) [22,[40][41][42][43][44][45][46][47][48][49][50], and co-doping metal and non-metal elements (such as Mo + C, Fe + N, Mo + S, and Co + N, S) [51][52][53][54][55][56][57] have been used to enhance the light absorption properties. Huang and co-workers [43,50] studied the electronic band structures of those doped TiO 2 nanomaterials by density functional theory, and explained the mechanism of the enhanced visible-light absorption.…”