Enhanced photocatalytic reduction activity of BiOCl nanosheets loaded on β-Bi2O3

Novel Z-Scheme BiOM1–xIx (M = Cl, Br)/β-Bi2O3-(001) and BiOI/β-Bi2O3-(001) Heterojunction Photocatalysts with O Vacancies: A Study on the Hybrid Density Functional Approach

“…This is a little larger than that of bulk or nanosheet 3.4−3.6 eV. 27,40 The calculated band structure for the BiOBr-(001) also presents an indirect bandgap character (Figure S4b), but that of the BiOI-(001) displays a direct character at the high-symmetry point Γ (Figure S4c), while the corresponding theoretical bandgap values are 3.18 and 2.52 eV, respectively. With the HSE06 calculations, the band structure of the two-layer 1 × 1 Oterminated (001) surface of β-Bi 2 O 3 (the adopted mixing parameter α = 0.3) is also shown in Figure S4d, which presents an about 2.29 eV direct bandgap at high-symmetry point Γ.…”

“…In experiments, the heterostructures BiOM (M = Cl, Br, I)/β-Bi 2 O 3 were speculated for the type II 1,8,16,20,24,28−30 or Zscheme 27 band alignments. On the one hand, these speculations originated from the following empirical equations…”

“…As a photocatalyst, Bi 2 O 3 usually presents the monoclinic structure (α-Bi 2 O 3) or tetragonal structure (β-Bi 2 O 3 ) . The heterostructures BiOM (M = Cl, Br, I)/β-Bi 2 O 3 acquired more interest and studies in experiments. ,,,,,− These experimental studies mostly involved the (122), (110), , (001), (012), , and (010) crystal facets of BiOM and the (201) ,,, crystal facet of β-Bi 2 O 3. However, theoretical studies on the photocatalytic mechanisms of these heterostructures are absent.…”

Sunlight driven isotropic β-Bi2O3 with high charge-carrier mobility for the efficient degradation of bisphenol A and phenol

“…[28][29][30][31][32] Nanosheets of β-Bi 2 O 3 were acquired by a hydrothermal-calcination method and a precipitation-calcination method. [33][34][35][36][37] Moreover, nanoparticles, nanowires, elliptical shapes, cubic shapes, dumbbell-like shapes, and flower-like shapes of β-Bi 2 O 3 were also acquired via different synthesis methods. [38][39][40][41][42][43] Although various morphologies have been prepared, some synthetic methods were complex and others required special surfactants.…”

Recent Progress of the Design and Engineering of Bismuth Oxyhalides for Photocatalytic Nitrogen Fixation

“…Figure 11 shows various types of heterostructures produced in bismuth-based photocatalysts reported so far toward N 2 fixation, such as cocatalyst loading, type I heterojunctions, type II heterojunctions, and Z-scheme heterojunctions. [152][153][154] The resultant structural changes lead to new properties that are not available in single phase materials. For example, if a [106] Copyright 2020, American Chemical Society.…”