Effect of surfactant on the photocatalytic activity of Bi2WO6 nanoparticles

Zhang, Xianghui; Gai, Wei‐Zhuo

doi:10.1007/s10854-017-6730-z

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…In order to obtain the k obs values for each catalytic assay, the ln(C/C 0 ) values were plotted against time, which resulted in 4.54(09) × 10 −3 min −1 , 22.68(02) × 10 −3 min −1 , and 55.89(01) × 10 −3 min −1 for photolysis, Bi 2 WO 6 , and Bi 2 WO 6 -glyc, respectively. In addition, the lowest half-life time for Bi 2 WO 6 -glyc (t 1/2 = 12.40 min) confirms that these microcrystals exhibited a high catalytic profile when compared with reported values in the literature [31][32][33][34][35][36].…”

Section: Photolysissupporting

confidence: 74%

High Photocatalytic Activity under Visible Light for a New Morphology of Bi2WO6 Microcrystals

et al. 2019

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In this work, a new morphology was obtained for bismuth tungstate (Bi 2 WO 6 -glyc) using a hydrothermal method with the addition of glycerol as a surfactant. In order to compare, the bismuth tungstate without glycerol as the surfactant, i.e., Bi 2 WO 6 , was synthesized. Structural characterization by XRD and Rietveld refinement confirmed the orthorhombic structure as a single phase for all samples with high crystallinity. All active modes in Raman spectroscopy for the orthorhombic phase of bismuth tungstate were confirmed in agreement with XRD analysis. N 2 adsorption/desorption and size pore distribution confirmed the high surface area (85.7 m 2 /g) for Bi 2 WO 6 -glyc when compared with Bi 2 WO 6 (8.5 m 2 /g). The optical band gap by diffuse reflectance was 2.78 eV and 2.88 eV for Bi 2 WO 6 -glyc and Bi 2 WO 6 , respectively. SEM images confirmed the different morphology for these materials, and microstructures with cheese crisp were observed for Bi 2 WO 6 -glyc (cheese crisp). On the other hand, flower-like microcrystals were confirmed for Bi 2 WO 6 sample. The photocatalytic performance of Bi 2 WO 6 -glyc (94.2%) in the photodegradation of rhodamine B (RhB) dye solutions at 60 min was more expressive than Bi 2 WO 6 (81.3%) and photolysis (8.2%) at 90 min.

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Section: Photolysissupporting

confidence: 74%

High Photocatalytic Activity under Visible Light for a New Morphology of Bi2WO6 Microcrystals

et al. 2019

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“…Generally, the temperature-dependent cor- Journal of the Ceramic Society of Japan 125 [12] Figure 7(a) shows the time-dependent photocatalytic degradation of RhB over Bi 2 WO 6 and AuBi 2 WO 6 . The degradation percentage of RhB is defined as (C 0 ¹ C t )/C 0 © 100%, where C 0 represents the initial RhB concentration and C t represents the remaining RhB concentration after irradiation for time t. It is seen that AuBi 2 WO 6 exhibits a photocatalytic activity much higher than that of bare Bi 2 WO 6 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic performance of Au nanoparticles-modified rose flower-like Bi<sub>2</sub>WO<sub>6</sub> hierarchical architectures

Zheng

Yang

Cui

2017

J. Ceram. Soc. Japan

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Rose flower-like Bi 2 WO 6 hierarchical architectures with average diameter of 7¯m were synthesized via a hydrothermal route. The as-synthesized Bi 2 WO 6 hierarchical architectures were decorated with Au nanoparticles (20110 nm in size) by a photocatalytic reduction method. The prepared samples were systematically investigated by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultravioletvisible diffuse reflectance spectroscopy, electrochemical impedance spectroscopy and photocurrent response. The photocatalytic performance of the samples was evaluated by the degradation of RhB in aqueous solution under simulated sunlight irradiation. It is observed that AuBi 2 WO 6 composite exhibits a photocatalytic activity much higher (about 2.7 times higher) than that of bare Bi 2 WO 6 . The enhanced photocatalytic activity of AuBi 2 WO 6 can be attributed to the enhanced separation of photogenerated electronhole pairs due to the electron migration from Bi 2 WO 6 hierarchical architectures to Au nanoparticles. As a result, more electrons and holes are able to participate in the photocatalytic reactions. The underlying photocatalytic mechanism was discussed.

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“…A lot of excellent semiconductor photocatalysts with high catalytic activity and stability have been prepared so far, such as TiO2, ZnO, WO3, SrTiO3, BiVO4, Bi2WO6, CdS, ZnIn2S4, etc. [6][7][8][9][10][11][12][13] Among the various photocatalysts, Bi2WO6 has attracted considerable interests because of its excellent physical and chemical properties. Bi2WO6 has a band gap of 2.6~2.8 eV that absorbs a reasonable fraction of the solar spectrum, and has high stability, high oxidation power of valence band (VB) holes.…”

Section: Introductionmentioning

confidence: 99%

Excellent photocatalytic rhodamine B degradation for water remediation over Pr3+ doped Bi2WO6 microspheres

Zhang

2022

J IRAN CHEM SOC

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In this work, a serious of Pr 3+ doped Bi2WO6 had been prepared by one-step hydrothermal method without using any additive. XRD results showed that the Pr 3+ doped Bi2WO6 possessed pure orthorhombic phase. XRD patterns shifted to higher angles with the doping amount of Pr 3+ increasing indicated that Pr 3+ was doped into the lattice of Bi2WO6. UV-vis DRS results revealed that the band gap was narrowed by Pr 3+ doping. SEM and TEM images showed that the Pr 3+ doped Bi2WO6 presented 3D flower-like microspheres constructed by many nanosheets. The photocatalytic activities of the as-prepared samples were evaluated by using rhodamine B (RhB) as the target organic pollutant. It was found that 1% Pr-Bi2WO6 exhibited excellent photocatalytic performance, as well as good stability and reusability. The improved photocatalytic activity can be ascribed to the optimum optical absorption activity, the larger specific surface area and the morphology of microspheres which resulted in the effective separation of the photogenerated electron hole pairs. In addition, the photocatalytic mechanism had been discussed according to the radical-trapping experiments.

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Effect of surfactant on the photocatalytic activity of Bi2WO6 nanoparticles

Cited by 13 publications

References 13 publications

High Photocatalytic Activity under Visible Light for a New Morphology of Bi2WO6 Microcrystals

High Photocatalytic Activity under Visible Light for a New Morphology of Bi2WO6 Microcrystals

Enhanced photocatalytic performance of Au nanoparticles-modified rose flower-like Bi<sub>2</sub>WO<sub>6</sub> hierarchical architectures

Excellent photocatalytic rhodamine B degradation for water remediation over Pr3+ doped Bi2WO6 microspheres

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