Unprecedented Eighteen‐Faceted BiOCl with a Ternary Facet Junction Boosting Cascade Charge Flow and Photo‐redox

Abstract

Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Coupling Piezocatalysis and Photocatalysis in Bi4NbO8X (X = Cl, Br) Polar Single Crystals

“…The co‐photodeposition of Pt and MnO x further confirms the above conclusion (Figure S16c, Supporting Information). Thus Bi 4 NbO 8 Br has the photoinduced facet‐selective charge separation behavior, which is also observed for some other layered Bi‐based photocatalysts, e.g., BiOIO 3 and BiOCl . On the other hand, the SEM images of Ag deposited Bi 4 NbO 8 Br nanoplates by ultrasonic are shown in Figure S16e in the Supporting Information.…”

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

“…In contrast to BIO‐L, the I L‐edge of BIO‐LOV2 shows a slight shift to lower energy, implying the valence state variation from I 5+ to I (5− x ) (inset of Figure 2i). The Fourier transform (FT) of k 2χ( k ) functions of BIO‐LOV2 exhibits weakened peak intensity, which can be ascribed to the surface structural disorder originating from the reduction of the neighboring O atoms around I atoms (Figure 2i), conforming to the XPS and EPR data . The above results collectively demonstrate the formation of surface OVs in BIO‐LOV2 and these OVs are mainly derived from the O atoms deficiency in the IO 3 polyhedrons.…”

Intrinsic Facet‐Dependent Reactivity of Well‐Defined BiOBr Nanosheets on Photocatalytic Water Splitting

“…Therefore, when the reduction reaction and oxidation reaction were spatially separated onto different surfaces using crystal‐facet engineering strategy as widely reported, a paramount importance factor to determine the photoreactivity of the semiconductor crystals could be the relative charge separation properties among the co‐exposing surfaces . Although it was demonstrated recently that the (001) facets of BiOCl are more preferable for reduction reactions while the oblique high‐index (112) facets are hole accumulating facets for oxidation reactions, the existence of high‐index facets does not change the charge properties. However, we experimentally verified the essential role of co‐exposing facets with the dominant exposed facets, which can completely change the charge properties of the dominant facets.…”

“…[2] As the surface atom configuration changes with crystal facets in different orientations, various kinds of photocatalytic reactions have been reported to be profoundly sensitive to the distinct crystal facets of semiconductor photocatalysts including TiO 2 , [3] BiVO 4 , [4] Ag 3 PO 4 , [5] and BiOCl. [6] As a class of typical layered materials composed of [Bi 2 O 2 ] units interleaved with double halide atom slabs, bismuth oxyhalides (BiOX, X = Cl, Br, I) belong to the family of SillØn phase compounds and have been acting as promising candidates in photocatalysis. [6,7] Most importantly, the surface atom coordination of bismuth oxyhalides can be manipulated by tuning the configuration between [Bi 2 O 2 ] units and halide atoms, resulting in the formation of distinct crystal facets and consequently leading to different photocatalytic performances.…”

“…[6] As a class of typical layered materials composed of [Bi 2 O 2 ] units interleaved with double halide atom slabs, bismuth oxyhalides (BiOX, X = Cl, Br, I) belong to the family of SillØn phase compounds and have been acting as promising candidates in photocatalysis. [6,7] Most importantly, the surface atom coordination of bismuth oxyhalides can be manipulated by tuning the configuration between [Bi 2 O 2 ] units and halide atoms, resulting in the formation of distinct crystal facets and consequently leading to different photocatalytic performances. Taking bismuth oxybromide (BiOBr) as an example, for instance, Scott et al found that BiOBr with dominant exposed (010) facets exhibits much better photocatalytic activity for both water oxidation and formic acid degradation as compared with BiOBr with highly exposed (001) facets.…”