A facile one-pot preparation of Bi2O2CO3/g-C3N4 composites with enhanced photocatalytic activity

Abstract

Bi2O2CO3 modified graphitic carbon nitride (g-C3N4) nanosheets were prepared by a simple one-pot synthetic strategy. In the presence of ammonium nitrate, different mass ratios of bismuth nitrate/melamine were used to fabricate these catalysts, which were characterized by X-ray diffraction (XRD), N2-physisorption, Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis analysis, and photoluminescence (PL). The catalytic properties of composites were evaluated by photodegrading tetracycline hydrochloride (TC) under visible light irradiation. Among these catalysts, Bi2O2CO3(1.5)/g-C3N4 showed the highest catalytic activity, which was more than 16 times greater than the pristine g-C3N4 material. The improved photocatalytic properties of Bi2O2CO3/g-C3N4 may be due to the formation of a heterojunction between Bi2O2CO3 and g-C3N4, leading to the effective separation of photo-induced carriers and the enhanced absorption of visible light. Furthermore, the Bi2O2CO3/g-C3N4 composites had considerable catalytic stability, which was a key element for their potential applications.

Photocatalytic activity enhancement of carbon‐doped g‐C3N4 by synthesis of nanocomposite with Ag2O and α‐Fe2O3

“…The visible-light source was provided by SMD lamps with different LI of 0.487, 0.785, 0.890, 2.005, and 2.543 W/m 2 . At first, 100 ml of a solution containing AR14 (5,10,15,20,25, and 30 mg/L) was prepared. The absorbance of the AR14 solution was measured by the UV-Vis spectrophotometer.…”

“…In the nanocomposite photocatalysts, new properties and characteristics can be created by the synergistic effects. [15][16][17][18] Hematite (α-Fe 2 O 3 ) is a p-type semiconductor and can be a good candidate to form nanocomposite with g-C 3 N 4 owing to its high electrical conductivity, good physicochemical stability, and good matching of bandgap structure with other semiconductors. [19,20] However, the pristine α-Fe 2 O 3 nanoparticles, without modification of their surface, have a high tendency to aggregate.…”

Photocatalytic degradation of tetracycline by Phosphorus-doped carbon nitride tube combined with peroxydisulfate under visible light irradiation

“…Graphitic carbon nitride (g-CN), as a no-metal visible responsive polymer material, has been considered a potential material for heterogeneous catalytic removal of various contaminants due to its excellent stability, appropriate band-gap, environmental friendliness, and low cost (Li et al 2020). However, the application and development of g-CN prepared by the traditional thermal polymerization are strongly restricted by its low specific surface area and the high rate of electronhole recombination (Duan et al 2019). Interestingly, g-CN as an inorganic material, these limitations can be overcome by elemental doping, morphology control, heterojunction, and combination with other AOP methods (Jiang et al 2017;Gao et al 2020;Shen et al 2021;Zhang et al 2021).…”