Synthesis of g-C3N4/Fe3O4/MoS2 composites for efficient hydrogen evolution reaction

Jiang, Menghe; Zou, Yongjin; Xu, Fen; Sun, Lixian; Hu, Zhicong; Yu, Sensen; Zhang, Jian; Xiang, Cuili

doi:10.1016/j.jallcom.2022.164265

Cited by 40 publications

(6 citation statements)

References 51 publications

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“…The characteristic diffraction peaks of Fe 3 O 4 and MoS 2 are discernible in the F-M-X, implying that the composite catalyst retains both Fe 3 O 4 and MoS 2 crystalline phases . However, the typical diffraction peak of MoS 2 at 39.26° in F-M-X composites is incomplete, possibly attributed to the partial low crystallinity of MoS 2 during the hydrothermal process, as reported before. , The Raman spectra of the F-M-3 and MoS 2 confirmed the presence of the intralayer (E 1 2g , 375.6 cm –1 ) and interlayer symmetric (A 1g , 405.7 cm –1 ) modes of the MoS 2 nanohybrid, as shown in Figure g. , As reported, the coexistence of the two infrared characteristic peaks in the F-M-3 suggested an intermolecular interaction between the two components through a possible formation of Fe–S bonds . Such interaction can intrinsically change the stress in the MoS 2 lattice and eventually vary the vibrational frequency of the lattice, as reflected by the Raman results.…”

Section: Resultssupporting

confidence: 68%

“…29,30 The Raman spectra of the F-M-3 and MoS 2 confirmed the presence of the intralayer (E 1 2g , 375.6 cm −1 ) and interlayer symmetric (A 1g , 405.7 cm −1 ) modes of the MoS 2 nanohybrid, as shown in Figure 1g. 31,32 As reported, the coexistence of the two infrared characteristic peaks in the F-M-3 suggested an intermolecular interaction between the two components through a possible formation of Fe−S bonds. 33 Such interaction can intrinsically change the stress in the MoS 2 lattice and eventually vary the vibrational frequency of the lattice, 34 as reflected by the Raman results.…”

Section: Characterization Ofmentioning

confidence: 54%

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Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Li,

Huo,

et al. 2023

ACS EST Eng.

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Molybdenum disulfide (MoS2) is a prevalent cocatalyst for peroxymonosulfate (PMS) activation with iron-based materials. The contribution of molybdenum atoms in cocatalyst MoS2 to iron regeneration during PMS activation has been broadly known, though the role of sulfur atoms remains explored. Here, we applied a one-step, facile means to prepare particulate Fe3O4 supported by wrinkled MoS2 with discernible sulfur vacancies (SV), forming a flower-like Fe3O4–MoS2 composite catalyst. We demonstrated, for the first time, a strong affinity of SV to PMS, facilitating the formation of an intermediate FeIII–PMS* while modulating the generation of pivotal nonradical species. Using an extensive characterization, we confirmed the simultaneous generation of high-valent iron-oxo species (FeIVO) and singlet oxygen (1O2) during PMS activation with the Fe3O4–MoS2 catalysts. In addition, we proposed that the FeIVO stemmed from the FeIII–PMS* precursor, which underwent heterolytic cleavage of the O–O bonds and concomitant rearrangement of oxygen atoms. Meanwhile, 1O2 is excited by PMS and formed by active oxygen (O*) liberated from iron oxides. Consequently, the Fe3O4–MoS2 catalysts showed impressive performance in removing typical micropollutants from real water sources, such as secondary effluent from wastewater treatment plants, tap water, and surface water stream. Our study provides new insights into a nonradical pathway for PMS activation with Sv-containing MoS2, clearing the way for developing high-performance MoS2 catalysts for water decontamination.

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Section: Resultssupporting

confidence: 68%

Section: Characterization Ofmentioning

confidence: 54%

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Li,

Huo,

et al. 2023

ACS EST Eng.

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“…The diffraction peak located near 13.0 • corresponds to the (100) plane of g-C 3 N 4 , while the peak observed around 27.4 • is attributed to the (002) plane of g-C 3 N 4 . These peak positions are in good agreement with the characteristic XRD patterns of g-C 3 N 4 (JCPDS 87-1526) [49]. For the Bi As depicted in Figure 2a, the g-C3N4 synthesized using the thermal oxidation exfoliation method with urea as a precursor resulted in a profusion of irregularly stacked lamellar structures.…”

Section: Characterizationsupporting

confidence: 81%

Investigating the Performance and Stability of Fe3O4/Bi2MoO6/g-C3N4 Magnetic Photocatalysts for the Photodegradation of Sulfonamide Antibiotics under Visible Light Irradiation

Chen

Xue

et al. 2023

Processes

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In this study, an Fe3O4/Bi2MoO6/g-C3N4 magnetic composite photocatalyst was synthesized for the visible-light-driven photocatalytic degradation of sulfonamide antibiotics, specifically sulfamerazine (SM1). Characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), photoluminescence spectroscopy (PL), UV-vis diffuse reflectance spectra (UV-vis), and the use of a vibrating sample magnetometer (VSM), were employed to analyze the fabricated samples. The composite exhibited efficient visible-light absorption and charge separation, with optimal photocatalytic performance achieved at a pH value of 9.0. The study reveals the importance of solution pH in the degradation process and the potential applicability of the composite for efficient magnetic separation and recycling in photocatalytic processes. The Fe3O4/Bi2MoO6/g-C3N4 magnetic composite photocatalyst demonstrated exceptional stability and recyclability, maintaining a high degradation efficiency of over 87% after five consecutive cycles. An XRD analysis conducted after the cycling tests confirmed that the composite’s composition and chemical structure remained unchanged, further supporting its chemical stability. This investigation offers valuable insights into the photocatalytic degradation of sulfonamide antibiotics using magnetic composite photocatalysts and highlights the potential of the Fe3O4/Bi2MoO6/g-C3N4 composite for practical applications in environmental remediation.

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“…At present, the evaluation of ECSA was based on its proportional relationship with the electric double-layer capacitance ( C dl ), so the magnitude of ECSA could be reflected by measuring C dl . Figure S7a–c shows the CV curves of the three catalysts at different scan speeds. , Figure e shows that the C dl (linear slope) of Fe 3 C-FeSA@3DCN is 11.2 mF cm –2 , and the ECSA of Fe 3 C-FeSA@3DCN was also larger than that of NC@3DCN and NC. These results indicated that Fe 3 C-FeSA@3DCN had larger catalytic active centers, and the material itself had more Fe-Nx active centers …”

Section: Resultsmentioning

confidence: 99%

“…Figure S7a−c shows the CV curves of the three catalysts at different scan speeds. 47,48 Figure 4e shows that the C dl (linear slope) of Fe 3 C-FeSA@3DCN is 11.2 mF cm −2 , and the ECSA of Fe 3 C-FeSA@3DCN was also larger than that of NC@ 3DCN and NC. These results indicated that Fe 3 C-FeSA@ 3DCN had larger catalytic active centers, and the material itself had more Fe-Nx active centers.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh-Loaded Fe Single Atoms and Fe₃C Nanoparticle Catalysts as Air Cathodes for High-Performance Zn–Air Batteries

Yang

Liu

Pan

et al. 2023

ACS Appl. Mater. Interfaces

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Fe-based materials containing Fe-Nx sites have emerged as promising electrocatalysts in the oxygen reduction reaction (ORR), but they still suffer structural instability which may lead to loss of catalytic activity. Herein, a novel electrocatalyst Fe 3 C-FeSA@3DCN with the coexistence of Fe 3 C nanoparticles and Fe single atoms (FeSA) in a three-dimensional conductive network (3DCN) is prepared via lattice confinement and defect trapping strategies with an Fe atomic loading of as high as 4.36%. In the ORR process, the limiting current density of Fe 3 C-FeSA@3DCN reaches 5.72 mA cm −2 , with an onset potential of 0.926 V and a Tafel slope of 66 mV/decade, showing better catalytic activity and stability than Pt/C catalysts. Notably, its assembled aqueous and solid-state Zn−air batteries (ZABs) achieve peak power densities of 166 and 56 mW cm −2 , respectively, with a long service life of up to 200 h at a current density of 5 mA cm −2 . In addition, the assembled ZAB can provide a constant voltage on activated carbon electrodes to perform capacitive deionization to adsorb different ions. The importance of the Fe species active sites generated by Fe 3 C and FeSA in the material for ORR activity to boost the electron transfer and mass transfer is demonstrated by a simple selective poisoning experiment.

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Synthesis of g-C3N4/Fe3O4/MoS2 composites for efficient hydrogen evolution reaction

Cited by 40 publications

References 51 publications

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Investigating the Performance and Stability of Fe3O4/Bi2MoO6/g-C3N4 Magnetic Photocatalysts for the Photodegradation of Sulfonamide Antibiotics under Visible Light Irradiation

Ultrahigh-Loaded Fe Single Atoms and Fe₃C Nanoparticle Catalysts as Air Cathodes for High-Performance Zn–Air Batteries

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Synthesis of g-C3N4/Fe3O4/MoS2 composites for efficient hydrogen evolution reaction

Cited by 40 publications

References 51 publications

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS2 with Sulfur Vacancies

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS2 with Sulfur Vacancies

Investigating the Performance and Stability of Fe3O4/Bi2MoO6/g-C3N4 Magnetic Photocatalysts for the Photodegradation of Sulfonamide Antibiotics under Visible Light Irradiation

Ultrahigh-Loaded Fe Single Atoms and Fe3C Nanoparticle Catalysts as Air Cathodes for High-Performance Zn–Air Batteries

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Product

Resources

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Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Toward Practical Water Decontaminations via Peroxymonosulfate Nonradical Oxidation: The Role of Cocatalyst MoS₂ with Sulfur Vacancies

Ultrahigh-Loaded Fe Single Atoms and Fe₃C Nanoparticle Catalysts as Air Cathodes for High-Performance Zn–Air Batteries