Fabrication of BiOIO3 with induced oxygen vacancies for efficient separation of the electron-hole pairs

Macroscopic Spontaneous Polarization and Surface Oxygen Vacancies Collaboratively Boosting CO2 Photoreduction on BiOIO3 Single Crystals

“…The appearance of these lower‐valence I ions is an indication of the existence of OVs . Meanwhile, the decline in the I–O peak intensity at 530.5 eV also confirms the decreased O atom amount coordinated to I (Figure S10, Supporting Information) . In addition, a shift of ≈0.3 eV toward lower binding energy is evident in the Bi 4f 5/2 (164.1 eV) and Bi 4f 7/2 (158.8 eV) peaks of BIO‐LOV2, also verifying the presence of OVs (Figure 2g).…”

Freeing the Polarons to Facilitate Charge Transport in BiVO4 from Oxygen Vacancies with an Oxidative 2D Precursor

“…In the present work, we have for the first time employed an oxygen‐rich 2D precursor, BiOIO 3 , as an internal oxidant, to prepare BiVO 4 photoanodes with drastically reduced oxygen vacancies and accelerated polaron hopping. Although BiOIO 3 has been intensively studied in the past decades and found important applications in the photocatalysis area, it has not been used as a precursor to synthesize BiVO 4 until now . The BiOIO 3 precursor has proved to be a strong oxidant owing to its highly oxidative IO 3 − group, which could prevent the formation of vanadium with lower valence.…”

“…In the present work, we have for the first time employed an oxygen-rich 2D precursor,BiOIO 3 ,asaninternal oxidant, to prepare BiVO 4 photoanodes with drastically reduced oxygen vacancies and accelerated polaron hopping.Although BiOIO 3 has been intensively studied in the past decades and found important applications in the photocatalysis area, it has not been used as ap recursor to synthesize BiVO 4 until now. [30][31][32][33] TheB iOIO 3 precursor has proved to be as trong oxidant owing to its highly oxidative IO 3 À group,which could prevent the formation of vanadium with lower valence. Moreover,i ti so xygen-rich, thus can provide sufficient oxygen when converted into BiVO 4 even in the bulk of the material or other oxygen deficient conditions.Inthis way,the defect states,n amely the oxygen vacancies,w ere suppressed in BiOIO 3 based BiVO 4 (IO 3 _BiVO 4 ).…”

Iron‐Doped Bismuth Tungstate with an Excellent Photocatalytic Performance

“…As we know that the changing tendency of Γ m and Γ s is the same as that of the amount of oxygen vacancies of the photocatalysts (Figure c–e and Table ), with the increase of the doping amount of Fe, the interaction between the oxygen vacancy sites and the substrates probably influences Γ m and Γ s . As oxygen vacancy sites are rich in electrons, H + in water is prone to be absorbed on the oxygen vacancy sites (Figure S10), which leads to the highest Zeta potential of BW‐Fe‐0.10 at pH 5–7. Similarly, the positively charged RhB and SA that bears −OH− and −COOH are also adsorbed easily on the oxygen vacancy sites, which leads to the highest Γ m and Γ s values of BW‐Fe‐0.10.…”