Direct electrospinning preparation of Z-scheme mixed-crystal Bi₂O₃/g-C₃N₄ composite photocatalysts with enhanced visible-light photocatalytic activity

Abstract

A novel Z-scheme mixed-crystal Bi2O3/g-C3N4 composite photocatalyst was successfully prepared by a simple electrospinning-calcination approach. The micromorphology, configuration, chemical interaction and optical property of the synthesized composite photocatalyst were analyzed...

New application of resin macrospheres: preparation of Bi2O3/C photocatalysts from an inexpensive organic carbon source and their application in dye wastewater treatment

“…According to the data of UV-vis DRS, eqn (2) was used to calculate the band gap of semiconductor materials. 62 where α (L (g cm) −1 ) is the absorption coefficient, which is proportional to Abs, and Abs directly replaces α ; h (J s) is the Planck constant; υ (Hz) is the frequency; n is related to the type of semiconductor, Bi 2 O 3 and Bi 2 O 3 /C-500 are direct band gap semiconductors in this study, with n = 1/2; A is the proportionality constant; and E g (eV) is the band gap.…”

Interfacial Electronic States of GeC/g‐C3N4 van der Waal Heterostructure with Promising Photocatalytic Activity via Hydrogenation

“…A vdWH created by stacking monolayers on top of one another, [49,50] which confines photogenerated charge carriers separately in different components, lowering the recombination rate is of prime interest in photocatalysis. Several monolayer materials have been researched to build 2D vdWHs, such as B-doped g-C 3 N 4 /SnS 2 , [51] arsenene/g-C 3 N 4 , [52] In 2 SeS/g-C 3 N 4 , [53] C 3 N 4 /graphene/g-C 3 N 4 , [54] MXene/g-C 3 N 4 , [55] Bi 2 O 3 /g-C 3 N 4 [56] and g-C 3 N 4 /MoS 2 [57] in both experimental and theoretical domains because of the exceptional properties of staggered type-II band alignment in photocatalysis. Moreover, GeC-based vdWHs such as GeC/MoS 2 , [58] GeC/ZnTe, [59] GeC/ BP, [60] GeC/SiC, [61] GeC/GaN, [62] GeC/CrN [61] and GeC/MX 2 (M=Mo and W; X=S and Se) [63] are also widely considered to tune the electronic properties of GeC.…”

Facile fabrication of a BiOBr–Cu2+/TiO2 suspension for efficient equipment decontamination

“…To date, Bi-based photocatalysts, including Bi-oxides, 13 Bi-oxometallates, 14 and Bi-oxyhalides, 15 have become promising candidates for visible-light-driven environmental photocatalysis, benefiting from their favourable band structure, high oxidation capacity, eco-friendliness, resource abundance and good durability. Among them, bismuth oxobromide (BiOBr) has emerged as a promising visible-light-responsive photocatalyst, with a unique layered structure and appropriate band gap ( E g , about 2.8 eV), and has been conjoined with TiO 2 to form heterojunctions for improving photocatalytic performance.…”