Novel FeWO4/WO3 nanoplate with p–n heterostructure and its enhanced mechanism for organic pollutants removal under visible-light illumination

Liu, Chang; Lü, Huihong; Yu, Changlin; Ding, Bo; Ye, Ruixue; Ji, Yuexia; Dai, Bing; Liu, Weiming

doi:10.1016/j.jece.2020.104044

Cited by 33 publications

(8 citation statements)

References 71 publications

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“…In this circumstance, the electrons on the CB can react with H 2 O 2 to produce • OH but cannot react with adsorbed oxygen to yield O 2 •– radicals. 31 As E VB = E CB + E g , the E VB of α-FeOOH, Fe 3 O 4 , and Fe-NCs-1 were calculated to be about +1.61, +0.49, and +1.07 eV versus NHE, respectively. Because the E VB of α-FeOOH is higher than that of H 2 O 2 /O 2 •– (+0.68 eV vs NHE), the h + on the VB can promote the production of O 2 •– .…”

Section: Resultsmentioning

confidence: 99%

“…The E CB positions of α-FeOOH, Fe 3 O 4 , and Fe-NCs-1 were calculated as −0.27, −0.31, and −0.2 eV versus normal hydrogen electrode (NHE), respectively. In this circumstance, the electrons on the CB can react with H 2 O 2 to produce • OH but cannot react with adsorbed oxygen to yield O 2 •– radicals . As E VB = E CB + E g , the E VB of α-FeOOH, Fe 3 O 4 , and Fe-NCs-1 were calculated to be about +1.61, +0.49, and +1.07 eV versus NHE, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

et al. 2021

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Magnetic Fe 3 O 4 /α-FeOOH heterojunction nanocomposites (denoted as Fe-NCs) have been synthesized by a fast one-pot hydrothermal method. The obtained Fe-NCs contain rich micropores with a high surface area of 135.15 m 2 /g. The different phases in the composites can efficiently enhance the visible-light absorption, improving the separation and transfer of photogenerated electron–hole pairs during the photocatalytic reaction. Thus, they show excellent degradation and mineralization of tetracycline (TC) over a wide pH range (5–9) in the visible photo-Fenton reaction. Especially, the catalyst exhibits the highest adsorption capacity toward TC at a neutral pH, which facilitates the surface reactions of TC with active species. Experiments evidence that the high production of photogenerated holes and superoxide radicals (O 2 •– ) in Fe-NCs are favorable to the high catalytic efficiency. Combined with liquid chromatography–mass spectrometry, the possible pathway toward TC degradation was proposed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

et al. 2021

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“…The following supporting information can be downloaded at: https: //www.mdpi.com/article/10.3390/catal13071044/s1. Synthesis of polymethylmethacrylate (PMMA) spheres; Supplementary Figures and Table [71][72][73][74][75][76][77][78][79]. Figure S1.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Electron Regulation in Pt-M (M = Cu, Co, and Ni) Decorated WO3 Thin Films for Photocatalytic Degradation Performance

et al. 2023

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In this study, Pt-M/WO3 (M = Cu, Co, and Ni) thin films are effectively synthesized by preparing homogeneous precursor sols, spin-coating, toluene-etching, and calcination. Furthermore, the microstructural, chemical, and electrochemical properties of the WO3, Pt-Cu/WO3, Pt-Co/WO3, and Pt-Ni/WO3 thin films are also systematically compared. The results demonstrate that when compared to the WO3 thin film, the photocatalytic capability for methylene blue (MB) solution degradation is greatly increased in the Pt-M/WO3 thin films. Transfer routes for photogenerated charges and an improved photocatalytic process are suggested based on the experimental results. Due to the large difference in the work function (Φ) between the bimetallic alloy Pt-M and WO3, a bending of the energy bands at the Pt-M/WO3 interface is presented. Furthermore, the introduction of transition metals such as Cu, Co, or Ni modifies the electronic structure of Pt-M/WO3 thin films, facilitating the separation and migration of electrons and holes. Specifically, the photogenerated electrons migrate from the CB of WO3 to Pt-Co or Pt-Ni nanoparticles in the samples of Pt-Co/WO3 or Pt-Ni/WO3 thin films, while the hot electrons from the localized surface plasmon resonance (LSPR) effect of Cu could transfer to the conduction band (CB) of WO3 and other electrons generated from the photoexcitation of the WO3 semiconductor itself in the sample of the Pt-Cu/WO3 thin film. In summary, this work proposes a unique strategy for creating electron regulation in Pt-M decorated WO3 thin films for photocatalytic application.

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“…Similar trend on incomplete degradation from TOC results are also found in literature (Du et al 2021). It may be assumed that longer sunlight exposure could lead to complete mineralization of MB dye into CO2 and H2O by treating with the photocatalyst (Liu et al 2020).…”

Section: Photocatalytic Degradation Of Methylene Blue (Mb) Dyementioning

confidence: 99%

Enhanced Photocatalytic Performance in Chromium(VI) Reduction and Dye Degradation using Sn3O4/SnS2 Nanocomposite and Mechanism Insight

Kumar

Dutta

2021

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Detection of residual organic and inorganic species in water bodies including drinking water has led to developing strategies for their removal. Here we report a very efficient method of photoreduction of Cr (VI) and photodegradation of methylene blue dye in aqueous medium using Z-scheme heterojunction based Sn3O4/SnS2 solar photocatalyst. The photocatalyst is synthesized by hydrothermal route and it is thoroughly characterized in terms of its structural, compositional, morphological and optical properties. About 100 % of Cr (VI) reduction in 60 min and 99.6 % of methylene blue degradation in 90 min is achieve under sunlight exposure at a photocatalytic rate of 0.066 min-1 and 0.043 min-1, respectively. The total organic carbon estimation of the post-degradation reaction medium corresponded to 85.1 % (MB) mineralization. The photocatalytic degradation is attributed to in-situ generation of reactive oxygen species (ROS) e.g., superoxide radicals, hydroxide radicals, and the role of ROS towards reduction and degradation of Cr (VI) and MB respectively, is confirmed from ROS scavenging studies. The dye degradation mechanism has been discussed by analyzing the degradation products via UPLC-Q-Tof-MS. The photocatalytic degradation of methylene blue by Sn3O4/SnS2 nanocomposites is significantly enhanced as compared to SnS2 photocatalyst, attributed to Z-scheme heterojunction and the charge carrier mobility.

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Novel FeWO4/WO3 nanoplate with p–n heterostructure and its enhanced mechanism for organic pollutants removal under visible-light illumination

Cited by 33 publications

References 71 publications

Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

Electron Regulation in Pt-M (M = Cu, Co, and Ni) Decorated WO3 Thin Films for Photocatalytic Degradation Performance

Enhanced Photocatalytic Performance in Chromium(VI) Reduction and Dye Degradation using Sn3O4/SnS2 Nanocomposite and Mechanism Insight

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Novel FeWO4/WO3 nanoplate with p–n heterostructure and its enhanced mechanism for organic pollutants removal under visible-light illumination

Cited by 33 publications

References 71 publications

Novel Magnetic Fe3O4/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

Novel Magnetic Fe3O4/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

Electron Regulation in Pt-M (M = Cu, Co, and Ni) Decorated WO3 Thin Films for Photocatalytic Degradation Performance

Enhanced Photocatalytic Performance in Chromium(VI) Reduction and Dye Degradation using Sn3O4/SnS2 Nanocomposite and Mechanism Insight

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Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process

Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process