Influence of the Facets of Bi24O31Br10 Nanobelts and Nanosheets on Their Photocatalytic Properties

Abstract

Bi24O31Br10 microcrystals composed of nanobelts and nanosheets with exposed (30-4) and (117) facets were synthesized by a simple hydrothermal method. The desired morphology and facets were obtained by adjusting the pH of the reaction system. Bi24O31Br10 nanobelts (BOB-NBs) with dominant (30-4) exposed facets were used for the photocatalytic degradation of tetracycline hydrochloride under visible light irradiation, with a degradation efficiency of up to 91% after 60 min of irradiation. The BOB-NBs possessed a higher charge separation and transfer efficiency, and showed less charge carrier recombination compared to the Bi24O31Br10 nanosheets (BOB-NSs), ascribed to a cooperative effect between the internal electric fields and surface active sites. A higher photocurrent response (2.6 times higher) was observed for BOB-NBs (12.8 μA cm−2) compared to that of BOB-NSs (4.9 μA cm−2). These findings are directional for a comprehensive understanding of the influence of the crystal facets of Bi24O31Br10 microcrystals on their photocatalytic activity and could help to guide the future design of high-performance photocatalytic materials.

Cysteine and ionic liquid modified magnetic nanoparticles supported RuCu as a new bimetallic catalyst in reduction reactions

“…The XPS spectrum of Br 3d revealed that the peaks centered at 67.3 and 68.3 eV are correspond to Br 3d5/2 and Br 3d3/2, respectively (Fig. 2e) [32][33]. The XPS spectrum of Si 2p, whose peaks appeared at 101.5, 102.9 and 103.9 eV were ascribed to Si-C, Si-O-C and SiO2, respectively (Fig.…”

Enhancement in the Structural and Optical Properties after Incorporation of Reduced Graphene Oxide (rGO) Nanocomposite in Pristine CsSnBr3 for Solar Cell Application

“…The peak shift of 0.083 eV indicates the addition of some carbon in the pristine CsSnBr 3 perovskite with rGO incorporation, as shown in Figure c. The chemical state of O 1s was carefully characterized and the peak was fitted, where two peaks are observed at binding energies of 529.96 and 531.25 eV . Such peaks are originated due to the C–OH and CO/OC–OH, respectively.…”

“…The chemical state of O 1s was carefully characterized and the peak was fitted, where two peaks are observed at binding energies of 529.96 and 531.25 eV. 40 Such peaks are originated due to the C−OH and C�O/O�C−OH, respectively. The Br 3d XPS spectrum is divided into two peaks at binding energies of 67.28 and 68.31 eV, which are attributed to Br 3d 5/2 and Br 3d 3/2 , respectively.…”

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

“…The peaks of lattice oxygen (O latt ) in NiO, CeO 2 , NiAl 2 O 4 , and the MA support was found at a BE of about 530 eV. The peaks of surface oxygen (O sur ) based on oxygen vacancies and hydroxyl were observed at higher BE values (531–532 eV) [ 52 , 53 ]. The relative concentration of metallic nickel Ni ([Ni 0 ]/[Ni 0 ] + [Ni 2+ ]), the relative concentration of Ce 3+ ([Ce 3+ ]/[Ce 4+ ] + [Ce 3+ ]), and the O sur /O latt ratio were then evaluated from their peak areas ( Table 2 ).…”