Solar Light-Irradiated Photocatalytic Degradation of Model Dyes and Industrial Dyes by a Magnetic CoFe₂O₄–gC₃N₄ S-Scheme Heterojunction Photocatalyst

Abstract

Magnetic CoFe2O4–gC3N4 nanocomposites were successfully synthesized, and their photocatalytic activities toward the decomposition of model synthetic dyes (e.g., methylene blue, methyl orange, and Congo red) in the presence of H2O2 were evaluated under simulated solar light irradiation. The 50CoFe2O4–50gC3N4 nanocomposite exhibited the highest catalytic activity. The catalytic activity of 50CoFe2O4–50gC3N4 toward the photodegradation of some industrially used dyes (such as Drimaren Turquoise CL-B p, Drimaren Yellow CL-2R p, and Drimaren Red CL-5B p) was also examined, and the catalyst exhibited its capability to decompose the industrial dyes completely. An aqueous mixture of these dyes was prepared to mimic the dye-containing wastewater, which was fully photodegraded within 30 min. 50CoFe2O4–50gC3N4 also exhibited facile magnetic separability from the reaction mixture after the accomplishment of photocatalysis reaction and stable performance after five cycles. The high photocatalytic efficiency to degrade several dyes, including dyes used in textile industries, under solar light irradiation makes 50CoFe2O4–50gC3N4 a promising photocatalyst for the treatment of dye-containing wastewater discharged from industries.

CoFe2O4 Hollow Spheres-Decorated Three-Dimensional rGO Sponge for Highly Efficient Electrochemical Charge Storage Devices

“…22-1086]. 30 , 31 The presence of only peaks corresponding to pure CF hs indicated the formation of single-phase CF hs by the employed hydrothermal synthetic route. The XRD patterns of GO ( Figure S2 ) and GO sp were identical to each other, which confirmed that no intrinsic structural changes occurred due to the formation of the spongelike nature.…”

S‐Scheme Photocatalytic Systems

“…S‐scheme photocatalysts demonstrate efficient performances for reactive oxygen species (ROS) evolution in pollutant decomposition and sterilization processes, e.g., CoFe 2 O 4 /g‐C 3 N 4 , 0D/2D CeO 2 /g‐C 3 N 4 , S‐pCN/WO 2.72 , Sb 2 WO 6 /g‐C 3 N 4 , OVs‐Bi 2 O 3 /Bi 2 SiO 5 , In 2 O 3– x (OH) y /Bi 2 MoO 6 , and BP/BiOBr, Bi 2 MoO 6 /CdS, BiOCl/CuBi 2 O 4 , Bi 2 WO 6 /g‐C 3 N 4 , SnNb 2 O 6 /Ag 3 VO 4 , BiOBr/BiOAC 1–– x Br x , BiOI/Bi 2 WO 6 , Bi 2 O 3 /TiO 2 , In 2 S 3 /Bi 2 O 2 CO 3 , ZnO–V 2 O 5 –WO 3 , S‐doped g‐C 3 N 4 /TiO 2 , BiVO 4 /Ag 3 VO 4 , CdS/UiO‐66, α‐Fe 2 O 3 /Bi 2 WO 6 , Cd 0.5 Zn 0.5 S/g‐C 3 N 4 , Sb 2 WO 6 /BiOBr, and Bi 2 MoO 6 /g‐C 3 N 4 /Au. [ 28,76–97 ] Li et al utilized thin black phosphorus (BP) to couple BiOBr nanosheets to construct S‐scheme BP/BiOBr nanoheterojunction for H 2 O 2 evolution, [ 80 ] as shown in Figure a. H 2 O 2 evolution rate over 10BP/BiOBr is 2.6 times than that over BiOBr.…”

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe2O4/S‐doped g‐C3N4 nanocomposite: A Z‐scheme system‐based heterojunction approach

“…[ 8 ] Also, the narrow band gap energy value of MFO:SCNNS (1:1) nanocomposite (E g = 2.32 eV) allowed it to efficiently absorb solar radiation. [ 123 ] Hence, due to increased light absorption in solar spectrum range, the designed heterojunction served as an effective visible light responsive photocatalytic material. Moreover, under refluxing condition, the degradation efficiency was also noted to be quite satisfactory because of the enhanced e − /h + pair separation and movement rate at higher temperature.…”