Interlayer-I-doped BiOIO₃ nanoplates with an optimized electronic structure for efficient visible light photocatalysis

Abstract

The success in the synthesis of Bi-based layered photocatalysts with high photocatalytic activities has triggered intensive studies. Herein, we prepared interlayer-I-doped BiOIO3 nanoplates by a facile method. Interestingly, it was found that I atoms were doped into the BiOIO3 interlayers instead of substituting for the lattice atoms based on theoretical and experimental results. The interbedded I atoms endowed BiOIO3 with an extended light response from the UV to the visible region by narrowing the bandgap and generating a middle level. The enhanced oxidation capability via positive-shifting the valence band position and improved carrier separation efficiency via forming charge delivery channels at the adjacent two layers can be achieved simultaneously. As expected, I-intercalated BiOIO3 with an optimized electronic structure demonstrated outstanding NO removal ability under visible light irradiation, much superior to pure BiOIO3. The present success in fabricating interlayer-I-doped BiOIO3 would open a promising route to prepare other Bi-based layered semiconductors with efficient visible-light photocatalysis.

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

“…After ozone treatment, I3dpeak centers shifted by 4eVfrom 619.4 eV and 630.9 eV to 623.2 eV and 634.8 eV, which indicates an oxidation from low valence iodine (I À )t o high valence species (IO 3 À ), corresponding to the formation of BiOIO 3 . [39][40][41] To our knowledge,t his BiOIO 3 thin film consisting of nanoflakes units distinguishes itself from the hydrothermally synthesized powder form reported previously. [31,39] X-ray diffraction (XRD) patterns of the two films presented the characteristic peaks relating to the d-spacing between layers of 2D materials ( Figure 2c); ac alculated XRD pattern of BiOIO 3 based on ap revious study is also shown.…”

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

“…The survey spectra of BIO-L and BIO-LOV2 display the three constituent elements of Bi, I, and O ( Figure S9, Supporting Information). In comparison to BIO-L, four new peaks at 631.2, 619.7, 629.7, and 618.4 eV appear in the I 3d spectra of BIO-LOV2, which are specified to I + 3d 3/2 , I + 3d 5/2 , [24] I + 3d 3/2 , and I − 3d 5/2 , [25] respectively. The appearance of these lower-valence I ions is an indication of the existence of OVs.…”

Bismuth‐Based Photocatalysts for Solar Photocatalytic Carbon Dioxide Conversion

“…[211,212] Thel ayered structure of BiOIO 3 results in the formation of an internal self-builte lectric field, which enhances the charge separation efficiency.I naddition, the non-centrosymmetric crystal structure of BiOIO 3 strengthens the internal polarization of the electric field to improve the charge separation efficiency. [211,212] Thel ayered structure of BiOIO 3 results in the formation of an internal self-builte lectric field, which enhances the charge separation efficiency.I naddition, the non-centrosymmetric crystal structure of BiOIO 3 strengthens the internal polarization of the electric field to improve the charge separation efficiency.…”

“…The groups of Huang and Dong reported the new Bi-based nonlinearo ptical materialB iOIO 3 as an efficient photocatalyst for the removal of liquid and gaseous pollutants. [211,212] Thel ayered structure of BiOIO 3 results in the formation of an internal self-builte lectric field, which enhances the charge separation efficiency.I naddition, the non-centrosymmetric crystal structure of BiOIO 3 strengthens the internal polarization of the electric field to improve the charge separation efficiency. [187] Recently,H uang et al regulated the surface {010}/{100} facet junctionso fB iOIO 3 .…”