One-pot synthesis of novel ternary Fe3N/Fe2O3/C3N4 photocatalyst for efficient removal of rhodamine B and CO2 reduction

Padervand, Mohsen; Rhimi, Baker; Wang, Chuanyi

doi:10.1016/j.jallcom.2020.156955

Cited by 93 publications

(27 citation statements)

References 87 publications

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“…However, the authors did not investigate the involvement of reactive oxygen species that are involved in photocatalytic activity. Recently, Mohsen Padervand et al [29] studied the formation of ROS where •OH radicals were fundamentally involved in RhB degradation under light, suggesting a Z-scheme mechanism.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

et al. 2022

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This study describes the preparation of graphitic carbon nitride (g-C3N4), hematite (α-Fe2O3), and their g-C3N4/α-Fe2O3 heterostructure for the photocatalytic removal of methyl orange (MO) under visible light illumination. The facile hydrothermal approach was utilized for the preparation of the nanomaterials. Powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive X-ray (EDX), and Brunauer–Emmett–Teller (BET) were carried out to study the physiochemical and optoelectronic properties of all the synthesized photocatalysts. Based on the X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance (DRS) results, an energy level diagram vs. SHE was established. The acquired results indicated that the nanocomposite exhibited a type-II heterojunction and degraded the MO dye by 97%. The degradation ability of the nanocomposite was higher than that of pristine g-C3N4 (41%) and α-Fe2O3 (30%) photocatalysts under 300 min of light irradiation. The formation of a type-II heterostructure with desirable band alignment and band edge positions for efficient interfacial charge carrier separation along with a larger specific surface area was collectively responsible for the higher photocatalytic efficiency of the g-C3N4/α-Fe2O3 nanocomposite. The mechanism of the nanocomposite was also studied through results obtained from UV-vis and XPS analyses. A reactive species trapping experiment confirmed the involvement of the superoxide radical anion (O2•−) as the key reactive oxygen species for MO removal. The degradation kinetics were also monitored, and the reaction was observed to be pseudo-first order. Moreover, the sustainability of the photocatalyst was also investigated.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

et al. 2022

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“…In order to contribute to the optimization of plastic waste management, an integrated strategy of waste minimization, reuse and recovery should be considered, since the processes of recycling and recovery enable waste to become a resource (Worrell and Reuter 2014). As we all know, the prior step in waste removal is always waste identification (Padervand et al 2021;Padervand, Rhimi, et al 2020). Plastic mixing generally leads to decreased mechanical properties as most of them are incompatible.…”

Section: Introductionmentioning

confidence: 99%

Convolutional neural network for identification of plastic solid waste using near infrared spectroscopy

Xia¹,

Huang²,

Li³

et al. 2021

Preprint

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Plastic waste is a relevant challenge for waste management sector and further technological means has to be urgently researched. Near infrared spectroscopy (NIR), as a non-destructive, cost-effective and mature technology, is currently operational in some waste-sorting facilities. However, NIR remains challenging to discriminate different black plastics because black targets have low reflectance in the its spectral region. Therefore, this study aimed to address the problem in black plastic classification. Seven kinds of plastics: High Impact Polystyrene (HIPS), Acrylonitrile Butadiene Styrene (ABS), High Density Polyethylene (HDPE), Polyethylene terephthalate (PET), Polyamide 66 (PA66), Polycarbonate (PC) and Polypropylene (PP), were prepared for analysis, in which black plastic accounted for half of the total samples (84/159). Some methods such as partial least squares discrimination analysis (PLS-DA), soft independent modelling of class analogy (SIMCA), linear discriminant analysis (LDA) and convolutional neural network (CNN) were used to classify the plastics. Coupling with proper preprocessing methods, PLS-DA and LDA could provide an accuracy of 57.00%, and SIMCA of 69.98%. Meanwhile, the NIR spectra fed into the CNN model as one-dimensional data, the accuracy of CNN model could reach 98.00%. Compared to the SIMCA, PLS-DA and LDA, the accuracy of CNN provided an average improvement of 28-41%. Results demonstrated that NIR spectra combined with CNN gave an excellent accuracy which was potential to solve the bottleneck problem of black plastic discrimination.

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“…However, in practice, the efficiency of α‐Fe 2 O 3 is very low, which is mainly attributed to recombination of photogenerated charge carriers and slow surface reaction kinetics. [ 24 ] At present, plenty of research studies have been reported in regard to fabricating α‐Fe 2 O 3 ‐based composite structures, such as Fe 3 N/Fe 2 O 3 /C 3 N 4, [ 25 ] α‐Fe 2 O 3 /Cu 2 O, [ 26 ] g‐C 3 N 4 @CoFe 2 O 4 /Fe 2 O 3, [ 27 ] α‐Fe 2 O 3 /Cu 2 O(SO 4 ), [ 28 ] Co1‐C 3 N 4 @α‐Fe 2 O 3, [ 29 ] etc., which dramatically improve the photocatalytic activity of α‐Fe 2 O 3 . Recent research studies report that nanosized α‐Fe 2 O 3 has weak ferromagnetic property, and it can obtain a certain negative magnetoresistance stemming from the interfacial field‐dependent hopping electron rate when α‐Fe 2 O 3 combines with other graphene and noble metal with good charge transport ability to form composite material.…”

Section: Introductionmentioning

confidence: 99%

Ultrasmall Ag species decorated on α‐Fe₂O₃ nanorods toward high‐efficient photocatalytic degrading tetracycline hydrochloride in water

Zhou

et al. 2021

J Chinese Chemical Soc

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The ultrasmall Ag species decorated on α‐Fe2O3 nanorods photocatalysts are prepared through a facile in situ photodeposition process. The obtained Ag/α‐Fe2O3 composite samples display more outstanding photocatalytic activity than original α‐Fe2O3 in the degradation of tetracycline hydrochloride (TC‐HCl) in water. The degradation rate constant of TC‐HCl over the Ag/α‐Fe2O3‐5 sample reaches up to 0.0118 min−1, which is about 6.21 times than that over original α‐Fe2O3 sample (0.0019 min−1). The structure characterizations, physicochemical properties, and photoelectrochemical measurements reveal that the visible light absorption ability and charge separation efficiency are improved dramatically owing to the decoration effect of ultrasmall Ag species on the surface of α‐Fe2O3 nanorods. The photocatalytic reaction mechanism investigations demonstrate that holes, ˙O2−, and ˙OH all are main active species and play important roles in the degradation process of TC‐HCl.

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One-pot synthesis of novel ternary Fe3N/Fe2O3/C3N4 photocatalyst for efficient removal of rhodamine B and CO2 reduction

Cited by 93 publications

References 87 publications

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

Convolutional neural network for identification of plastic solid waste using near infrared spectroscopy

Ultrasmall Ag species decorated on α‐Fe₂O₃ nanorods toward high‐efficient photocatalytic degrading tetracycline hydrochloride in water

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One-pot synthesis of novel ternary Fe3N/Fe2O3/C3N4 photocatalyst for efficient removal of rhodamine B and CO2 reduction

Cited by 93 publications

References 87 publications

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

Synthesis and Characterization of an α-Fe2O3-Decorated g-C3N4 Heterostructure for the Photocatalytic Removal of MO

Convolutional neural network for identification of plastic solid waste using near infrared spectroscopy

Ultrasmall Ag species decorated on α‐Fe2O3 nanorods toward high‐efficient photocatalytic degrading tetracycline hydrochloride in water

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Ultrasmall Ag species decorated on α‐Fe₂O₃ nanorods toward high‐efficient photocatalytic degrading tetracycline hydrochloride in water