Hydrothermal Synthesis of g‐C₃N₄/NiFe₂O₄ Nanocomposite and Its Enhanced Photocatalytic Activity

Abstract

Herein, for the first time, a direct Z-scheme g-C 3 N 4 /NiFe 2 O 4 nanocomposite photocatalyst was prepared using facile one-pot hydrothermal method and characterized using XRD, FT-IR, DRS, PL, SEM, EDS, TEM, HRTEM, XPS, BET and VSM characterized techniques. The result reveals that the NiFe 2 O 4 nanoparticles are loaded on the g-C 3 N 4 sheets successfully. The photocatalytic activities of the as-prepared photocatalysts were evaluated for the degradation of methyl orange (MO) under visible light irradiation. It was shown that the photocatalytic activity of the g-C 3 N 4 /NiFe 2 O 4 nanocomposite is about 4.4 and 3 times higher than those of the pristine NiFe 2 O 4 and g-C 3 N 4 respectively. The enhanced photocatalytic activity could be ascribed to the formation of g-C 3 N 4 /NiFe 2 O 4 direct Z-scheme photocatalyst, which results in efficient space separation of photogenerated charge carriers. More importantly, the as-prepared Z-scheme photocatalyst can be recoverable easily from the solution by an external magnetic field and it shows almost the same activity for three consecutive cycles. Considering the simplicity of preparation method, this work will provide new insights into the design of high-performance magnetic Z-scheme photocatalysts for organic contaminate removal.

Efficient Interfacial Charge Transfer Based on 2D/2D Heterojunctions of Fe-C3N4/Ti3C2 for Improving the Photocatalytic Degradation of Antibiotics

“…It is observed from Figure 5C that the Ti 3 C 2 shows broad absorption in the whole region (200∼800 nm), and there is no obvious absorption with the edge, indicating that Ti 3 C 2 has metallic properties. The pristine g-C 3 N 4 displays a typical absorption region at about 450 nm, which is consistent with the literature ( Gebreslassie et al, 2019 ). The optical cutoff wavelengths of Fe-C 3 N 4 , g-C 3 N 4 /Ti 3 C 2 , and Fe-C 3 N 4 /Ti 3 C 2 are 467 nm, 458, and 470 nm, respectively.…”

Facile fabrication and enhanced photocatalytic performance of visible light responsive UiO-66-NH2/Ag2CO3 composite

“…10c and 10d) illustrate negative and positive correction between C 2 value and potential value, implying that Ag2CO3 and UiO-66-NH2 displayed the typical behavior of p-type semiconductor and n-type semiconductor, respectively [67]. Compared with the pristine Ag2CO3 and UiO-66-NH2, the enhanced photocatalytic activity of UAC-X composites may be assigned to the p-n junction formed between the n-type UiO- 66 Based on the properties and experimental studies of the UAC-100 composite, UiO-66-NH2, and Ag2CO3, the possible direct Z-scheme photocatalytic mechanism of organic dyes and Cr(VI) reduction under the irradiation of visible light was proposed (Scheme 2) [68][69][70][71][72]. Under the visible light irradiation, the electrons in the highest occupied molecular orbital (HOMO) of UiO-66-NH2 will be excited to the lowest occupied molecular orbital (LUMO), and similarly, the electrons in the VB position of Ag2CO3 will be excited to the CB position.…”

Conversion of a Type-II to a Z-Scheme Heterojunction by Intercalation of a 0D Electron Mediator between the Integrative NiFe2O4/g-C3N4 Composite Nanoparticles: Boosting the Radical Production for Photo-Fenton Degradation

“…However, the bare g-C 3 N 4 is not suitable for practical implementation due to fast recombination of electron–hole pairs in it, sluggish exciton dissociation, low surface area, and insufficient light absorption ability. 13 − 15 Hence, various strategies have been employed such as fabricating nanostructures, coupled with conducting materials, foreign atom doping, and creating vacancies to improve the photocatalytic efficiency of bare g-C 3 N 4 . 16 , 17 16 , 17 In addition to this, molecular engineering strategies have also been developed for g-C 3 N 4 to extend the optical absorption ability and accelerate the charge transfer.…”