Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhanced H2-production performance

Black N/H‐TiO2 Nanoplates with a Flower‐Like Hierarchical Architecture for Photocatalytic Hydrogen Evolution

“…As shown in the valence band (VB) XPS ( Figure 4D), the VBM of NHTAw as located at 1.82 eV,w hich was 0.8 eV and 1.18 eV lower than the VBM of NTA( 2.62 eV) and TiO 2 (3.0 eV), respectively. [43] Accordingly,t he conductance band minima (CBM) of NHTAand NTAwere À0.50 and À0.49 eV,respectively,asc alculated by CBM = VBMÀE g .T he results suggestt hat hydrogenation significantly increases the VBM buts lightly decreases the CBM. Previously reportedd ensity functional theorys imulations and experimental resultso fN -doped TiO 2 qualitatively suggest that O vac can increase the VBM and Ti 3 + (3 do rbitals) can change the CBM, which depends on the amount of Ti 3 + .…”

Mo-doped TiO2photoanodes using [Ti4Mo2O8(OEt)10]2bimetallic oxo cages as a single source precursor

“…6,7 Research on metal doping of TiO 2 with Ta, Fe, Co, Mn, and Ni is abundant and has proved to be successful in both reducing the band gap and improving the photoelectrochemical performance (PEC). [8][9][10][11] For instance, Yan et al reported an enhancement in the PEC performance for Ta-doped TiO 2 nanotube photoanodes in comparison to pristine TiO 2 . 8 This enhanced PEC performance was attributed to a decrease in the band gap, lower charge transfer resistance and higher charge carrier density.…”

“…Similarly, Zhao et al successfully demonstrated that Fe-doped TiO 2 results in a better PEC performance than pristine TiO 2 , attributed to a smaller band gap and thus a better light absorption. 9 However, very few studies have been reported for Mo doping of TiO 2 and those few were mainly focused on photodegradation of organic dyes, not PEC water splitting. [12][13][14][15][16] In 2015 Zhang et al reported Mo-doped TiO 2 photoanodes prepared using two steps of Ti foil anodization and a third one of hydrothermal doping, obtaining an improved PEC performance over pure TiO 2 photoanodes.…”

Hydrogenated TiO2/SrTiO3 porous microspheres with tunable band structure for solar-light photocatalytic H2 and O2 evolution

“…The visible-light photocatalytic performance of a catalyst strongly depends on the nature of the catalyst in terms of defect states, components, etc. Various strategies have been proposed to shift the photoabsorption region of wide-band-gap photocatalysts toward the visible-light region, such as doping with metals (e.g., Cr or Fe) and nonmetal ions (e.g., N or S) [15][16][17][18][19] or coupling with other narrow-band-gap semiconductors [20,21]. Furthermore, recent studies have shown that, through the partial reduction method, semiconductors modified by hydrogen treatment (e.g., TiO2 and CeO2) present oxygen vacancies and exhibit visible-light response for robust charge generation [22][23][24].…”