Novel visible-light-driven Fe2O3/Ag3VO4composite with enhanced photocatalytic activity toward organic pollutants degradation

Xu, Hui; Jing, Liquan; Xiao, Chen; Ji, Haiyan; Li, Hongping; Zhang, Qi

doi:10.1039/c5ra22912j

Cited by 29 publications

(5 citation statements)

References 45 publications

(32 reference statements)

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“…The calculated binding energy difference, (Δ = 2p 1/2 -2p 3/2 ) was 13.7 eV, which agreed well with reference Fe 2+ [36]. The 718.7 eV peak belongs to the satellite peaks [37], indicates that photoemission of the oxide in the Fe site [38]. Additionally, peaks at 713.9 and 728.8 eV were ascribed to FeSO 4 and Fe 2 O 3 .…”

Section: Xps Analysissupporting

confidence: 62%

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Formation of FeS Tribofilm from Unsymmetrical Disulfides as Effective Extreme Pressure and Antiwear Additives

Ong

Lim

Lai³

et al. 2022

Preprint

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Sulfur-based additives have excellent extreme pressure (EP) performance. However, a high amount of sulfur causes metal corrosion. The non-corrosive and ashless organo-disulfides have been synthesized via Bunte salt method. The unsymmetrical dodecyl octyl disulfide (DDODS) with good oil-solubility provides better EP and anti-wear (AW) properties. The DDODS shows outstanding EP value (1961 N) and small WSA (9 mm²) in naphthenic base oil (NBO), respectively. This performance is superior compared to symmetrical didodecyl disulfide (DDDS). The outstanding performance of DDODS is due to the good solubility in NBO and the formation of a sulfur film on the metal surface. The formation of iron sulfide (FeS) under EP conditions provides excellent tribofilm compared to iron (III) oxide (Fe2O3) and iron sulfate (FeSO4).

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Section: Xps Analysissupporting

confidence: 62%

“…This indicated the S-S bonds are broken down and reacted with the metal surface to generate S-containing tribo lm. Almost similar satellite peaks were also observed at 718.9 eV [37]. The peaks at 713.2 and 728.1 eV correspond to FeSO 4 , which is associated with the S 2p peak at 168.6 eV and O 1s peak at 532.3 eV [39].…”

Section: Xps Analysissupporting

confidence: 55%

Formation of FeS Tribofilm from Unsymmetrical Disulfides as Effective Extreme Pressure and Antiwear Additives

Ong

Lim

Lai³

et al. 2022

Preprint

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“…More recently, silver-based metal oxides such as Ag 2 WO 4 [25,26], Ag 3 PO 4 [27,28], Ag 3 VO 4 [29], AgVO 3 [30], Ag 2 MoO 4 [31] and Ag 2 CrO 4 [32,33] have gained extensive consideration because they have shown an excellent photocatalytic activity in visible-light irradiation. Among them, AgVO 3 is widely reported as an emerging photocatalyst for degradation of the visible-light organic pollutants in waste-water due to its unique properties such as strong absorption in the visible light range, simple preparation, non-toxicity, high electrical conductivity and good crystallinity [34,35].…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

et al. 2018

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In this work, we have synthesized the rod-on-rod–like α-FeOOH/α-AgVO3 nanocomposite photocatalysts with the different amounts of solvothermally synthesized α-FeOOH nanorods via a simple co-precipitation method. The as-synthesized photocatalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, UV−Visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM), element mapping, high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The observed SEM images show that both α-AgVO3 and α-FeOOH exhibits the rod-shaped morphology with nano size. Furthermore, the photocatalytic activities of the obtained photocatalysts were evaluated towards the degradation of Rhodamine B (RhB) under visible-light irradiation. It is demonstrated that the 3 mg α-FeOOH added to the α-FeOOH/α-AgVO3 nanocomposite exhibited an enhanced photocatalytic performance as compared with the pure α-AgVO3 and α-FeOOH. This significant improvement can be attributed to the increased photo-excited electron-hole pair separation efficiency, large portion of visible-light absorption ability and the reduced recombination of the electron-hole pair. The recycling test revealed that the optimized nanocomposite exhibited good photostability and reusability properties. In addition, the believable photodegradation mechanism of RhB using α-FeOOH/α-AgVO3 nanocomposite is proposed. Hence, the developed α-FeOOH/α-AgVO3 nanocomposite is a promising material for the degradation of organic pollutants in an aqueous environment.

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“…On its own, haematite shows poor photocatalytic activity due to the high recombination rate of the charge carriers and poor conductivity [90,91]. Despite its poor photocatalytic activity, the narrow band gap of haematite makes it an ideal sensitiser for improving the visible light response of various semiconductors.…”

Section: Haematite (α-Fe 2 O 3 )-Based Magnetic Photocatalystsmentioning

confidence: 99%

“…As a pristine material, haematite is a narrow band gap semiconductor (2-2.2 eV) with good visible light response, good chemical stability, low-cost, ferromagnetic behaviour, abundantly available, high resistance to corrosion, and environmentally friendly [89][90][91]. On its own, haematite shows poor photocatalytic activity due to the high recombination rate of the charge carriers and poor conductivity [90,91].…”

Section: Haematite (α-Fe2o3)-based Magnetic Photocatalystsmentioning

confidence: 99%

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Mamba

Mishra

2016

Catalysts

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Organic and inorganic compounds utilised at different stages of various industrial processes are lost into effluent water and eventually find their way into fresh water sources where they cause devastating effects on the ecosystem due to their stability, toxicity, and non-biodegradable nature. Semiconductor photocatalysis has been highlighted as a promising technology for the treatment of water laden with organic, inorganic, and microbial pollutants. However, these semiconductor photocatalysts are applied in powdered form, which makes separation and recycling after treatment extremely difficult. This not only leads to loss of the photocatalyst but also to secondary pollution by the photocatalyst particles. The introduction of various magnetic nanoparticles such as magnetite, maghemite, ferrites, etc. into the photocatalyst matrix has recently become an area of intense research because it allows for the easy separation of the photocatalyst from the treated water using an external magnetic field. Herein, we discuss the recent developments in terms of synthesis and photocatalytic properties of magnetically separable nanocomposites towards water treatment. The influence of the magnetic nanoparticles in the optical properties, charge transfer mechanism, and overall photocatalytic activity is deliberated based on selected results. We conclude the review by providing summary remarks on the successes of magnetic photocatalysts and present some of the future challenges regarding the exploitation of these materials in water treatment.

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Novel visible-light-driven Fe₂O₃/Ag₃VO₄composite with enhanced photocatalytic activity toward organic pollutants degradation

Abstract: Photoactivity of Ag3VO4 can be enhanced by modification with Fe2O3. The electrochemical impedance of the composite being smaller than pure Ag3VO4 may be one reason.

Cited by 29 publications

References 45 publications

Formation of FeS Tribofilm from Unsymmetrical Disulfides as Effective Extreme Pressure and Antiwear Additives

Formation of FeS Tribofilm from Unsymmetrical Disulfides as Effective Extreme Pressure and Antiwear Additives

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

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