Achieving effective control of the photocatalytic performance for CoFe2O4/MoS2 heterojunction via exerting external magnetic fields

Lu, Yukai; Ren, Biying; Chang, Shucheng; Mi, Wenbo; He, Jing; Wang, Wei

doi:10.1016/j.matlet.2019.126979

Cited by 35 publications

(8 citation statements)

References 16 publications

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“…In the process of magnetic-field-assisted photocatalysis, the direction of the Lorentz force endowed by the magnetic field on the photocatalyst is always changing, which can inhibit agglomeration of the powder catalyst. Especially in a magnetic catalyst, because of the existence of magnetic memory, the charge carried by the catalyst itself will be enhanced, which will increase the repulsion between the catalyst particles and promote the attraction between the catalyst and the reactant molecules. , In this way, the active sites on the surface of the photocatalyst can be exposed more, and the reactant molecules can be adsorbed and degraded faster. For example, Mn 3 O 4 /γ-MnOOH synthesized by Li et al can degrade 98.8% of norfloxacin in 60 min under low magnetic-field-assisted visible light .…”

Section: Magnetic Fieldmentioning

confidence: 99%

Recent Advances in Noncontact External-Field-Assisted Photocatalysis: From Fundamentals to Applications

et al. 2021

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The effective separation of photogenerated carriers plays a vital role in photocatalytic reactions. In addition to the intrinsic driving force of photocatalysis, an external field generating an enhancement effect can provide extra energy to the photocatalytic system, acting as an additional impetus to separate photogenerated charges and thus improving the overall catalytic efficiency. Under the favorable noncontact conditions, exploring the effect of the external field, different from pure photocatalysis or photoelectrocatalysis, could widen the applications of photocatalysis technology. In this review, four typical noncontact external fields (i.e., thermal, magnetic, microwave, and ultrasonic fields) and their coupling effects on photocatalysis are summarized. Specifically, the review focuses on the mechanism and characteristics of each external field’s synergistic effect and their coupling effects on the performance of the catalytic system. The charge separation driving forces provided by the noncontact external field and the traditional one are distinguished and defined for the first time. The challenges and future prospects of noncontact external-field-driven photocatalysis are discussed. We hope that this review will provide a reference for the research and development of external-field-assisted photocatalysis and give insights for the in-depth study of external-field-coupling-enhanced photocatalysis toward improvement of the catalytic efficiency.

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Section: Magnetic Fieldmentioning

confidence: 99%

Recent Advances in Noncontact External-Field-Assisted Photocatalysis: From Fundamentals to Applications

et al. 2021

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“…In magnetic-field-assisted photocatalysis, the magnetic field changes the direction of the Lorentz force towards the photocatalyst, which increases the repulsive forces between catalyst particles (especially in a magnetic catalyst) and promotes the attraction between the catalyst particles and reactant molecules, thereby inhibiting the agglomeration of the catalyst powder. [33] Additionally, the forced flow generated by MHD tends to impair the thickness of the VS and enhance mass transfer. The magnetic field affects the mass transfer mainly through the Lorentzian magnetic force (F L ), solution convection, and increase in the diffusion region of the surrounding medium.…”

Section: Magnetohydrodynamicsmentioning

confidence: 99%

Multiscale Catalysis Under Magnetic Fields: Methodologies, Advances, and Trends

Liu

Huang

et al. 2022

ChemCatChem

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Magnetic field‐enhanced catalysis is an advanced strategy for enhancing catalytic reactions that have emerged in recent years, presenting great potential for alleviating the energy crisis and environmental pollution. Under favorable non‐contact magnetic field conditions, the external magnetic field that produces the enhancement effect can provide additional energy to the catalytic system as an additional driving force for the catalytic reaction and thus positively improve the overall catalytic efficiency. Exploring the effects of magnetic fields on multiscale catalytic reactions can broaden the practical applications of various catalytic reactions. This review begins with a brief introduction and analysis of possible mechanisms for magnetic field‐enhanced catalytic reactions (including spin polarization theory and electromagnetic theory), a description of the forces generated by magnetic fields, nano‐ and microscale magnetic materials, and various commonly used magnetic manipulation systems, and an overview of the application of magnetic fields to enhanced photocatalytic, electrocatalytic and biocatalytic reactions. Finally, the challenges and future prospects for advancing magnetic field‐enhanced catalytic reactions are presented. It is hoped that this review will provide a reference for the development and in‐depth study of magnetic field‐assisted enhanced catalytic reactions to improve catalytic efficiency.

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“…Spinel ferrites with superior magnetic features and small band gaps are a profitable procedure to defeat these shortcomings of MoS 2 , where spinel ferrites can stimulate the existence of photoinduced charge carriers and improve the photodegradation sensitivity to visible light (Abdel Maksoud et al 2020;Lu et al 2020;Marcelo et al 2021).…”

Section: Mos 2 -Metals Oxides Materialsmentioning

confidence: 99%

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

et al. 2021

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The world is currently facing critical water and energy issues due to the growing population and industrialization, calling for methods to obtain potable water, e.g., by photocatalysis, and to convert solar energy into fuels such as chemical or electrical energy, then storing this energy. Energy storage has been recently improved by using electrochemical capacitors and ion batteries. Research is actually focusing on the synthesis of materials and hybrids displaying improved electronic, physiochemical, electrical, and optical properties. Here, we review molybdenum disulfide (MoS2) materials and hybrids with focus on synthesis, electronic structure and properties, calculations of state, bandgap and charge density profiles, and applications in energy storage and water remediation.

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Achieving effective control of the photocatalytic performance for CoFe2O4/MoS2 heterojunction via exerting external magnetic fields

Cited by 35 publications

References 16 publications

Recent Advances in Noncontact External-Field-Assisted Photocatalysis: From Fundamentals to Applications

Recent Advances in Noncontact External-Field-Assisted Photocatalysis: From Fundamentals to Applications

Multiscale Catalysis Under Magnetic Fields: Methodologies, Advances, and Trends

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

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