Ultrasonic-Assisted Synthesis of 2D α-Fe2O3@g-C3N4 Composite with Excellent Visible Light Photocatalytic Activity

Abstract

In this study, α-Fe2O3@g-C3N4 photocatalyst was synthesized using an ultrasonic assisted self-assembly preparation method. The α-Fe2O3@g-C3N4 photocatalyst had a stronger optical absorption in the visible light region than pure graphitic carbon nitride (g-C3N4). The Z-Scheme heterojunction between α-Fe2O3 and g-C3N4 significantly inhibited the recombination of electrons and holes. The photocatalytic performances of α-Fe2O3@g-C3N4 photocatalyst were excellent in degradation of Rhodamine B (RhB) under visible light irradiation. The results indicated that 5 wt.% α-Fe2O3/g-C3N4 had the optimal photocatalytic activity because two-dimension (2D) α-Fe2O3 nanosheets can be well-dispersed on the surface of g-C3N4 layers by ultrasonic assisted treatment. A possible photocatalytic mechanism is also discussed.

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

“…The photocatalytic activity enhancement of the GAF nanocomposite under visible-light irradiation can be more discussed by the valence band (VB) and conduction [35,41,43] According to this information, a possible photocatalytic mechanism for GAF was proposed and illustrated in Figure 9. When the GAF nanocomposite absorbed visible light, e À (in the CB) and h + (in the VB) were generated.…”

α−Fe2O3 Nanoparticles/Porous g−C3N4 Hybrids Synthesized by Calcinations of Fe‐based MOF/Melamine Mixtures for Boosting Visible‐Light Photocatalytic Tetracycline Degradation

“…Nevertheless, the short lifetime of photo‐generated charge carriers and small hole diffusion length greatly hinder the widespread application of α−Fe 2 O 3 in photocatalysis . In the past several years, the coupling of g−C 3 N 4 with α−Fe 2 O 3 has been an effective route to enhance themselves′ visible‐light photocatalytic activity in various fields such as pollutant degradation, hydrogen production, CO 2 reduction, organic synthesis, and nitrogen fixation . Due to the appropriate band positions of α−Fe 2 O 3 and g−C 3 N 4 , the strong interfacial coupling of α−Fe 2 O 3 /g−C 3 N 4 hybrids largely promoted the transfer and separation of photoinduced charge carriers by common or even Z‐scheme modes, directly accounting for their high photocatalytic efficiency.…”

Facile Synthesis of Mesoporous α-Fe2O3@g-C3N4-NCs for Efficient Bifunctional Electro-catalytic Activity (OER/ORR)

“…Therefore, we have designed mesoporous α-Fe 2 O 3 @g-C 3 N 4 nanocomposites (NCs) electro-catalysts for electrolysis of water. The α-Fe 2 O 3 @g-C 3 N 4 -NCs were reported in photo-catalysis 33–35 , supercapacitors 36 and photo-electrochemical reactions 37 . Porous core@shell Fe 3 C@NSC electro-catalyst was reported for efficient ORR in alkaline medium 38 .…”

“…Recently, α-Fe 2 O 3 @g-C 3 N 4 nanostructured materials were synthesized by co-calcination 46,47 , ultrasonic 35 , hydrothermal 48 methods and used for waste water treatment and photochemical reactions. Herein, we report the facile synthesis of mesoporous α-Fe 2 O 3 @g-C 3 N 4 -NCs using urea-formaldehyde (UF) resins at 400 °C/2 h. The structural and morphological characterizations of synthesized nanomaterials were carried out by powder X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electron microscopic techniques.…”