Visible-light driven photocatalytic degradation of rhodamine B by Ag/Bi2WO6 heterostructures

Phuruangrat, Anukorn; Maneechote, Arin; Dumrongrojthanath, Phattranit; Ekthammathat, Nuengruethai; Thongtem, Somchai; Thongtem, Titipun

doi:10.1016/j.matlet.2015.07.029

Cited by 59 publications

(14 citation statements)

References 15 publications

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“…The pattern can be indexed to the (200), ( 220) and (020) planes of orthorhombic Bi 2 WO 6 which is in good agreement with the XRD standard [19,20]. A set of diffraction spots was speci ed as the [001] zone axis of orthorhombic Bi 2 WO 6 .…”

Section: Resultssupporting

confidence: 67%

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Phuruangrat

Teppetcharat

Patiphatpanya

et al. 2021

Preprint

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Heterostructure Pd/Bi2WO6 nanocomposites were successful synthesized in ethylene glycol by microwave-assisted deposition method at 300 W for 10 min. Effect of the loaded Pd on phase, composition, morphology and visible-light-driven photocatalytic properties of Bi2WO6 was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fast-Fourier-Transform (FFT) diffraction, UV-visible absorption and X-ray photoelectron spectroscopy (XPS). In this research, good distribution of cubic phase of spherical Pd nanoparticles with particle size of 15–20 nm supported on orthorhombic Bi2WO6 thin nanoplates. The 10% Pd/Bi2WO6 nanocomposites reveal major metallic Pd0 species containing in Bi2WO6 sample. Microwave can be used to synthesize metallic Pd nanoparticles supporting on top of Bi2WO6 nanoplates. Photocatalytic activities of Bi2WO6 loaded with different weight contents of Pd were monitored through photodegradation of cationic rhodamine B (RhB) dye under visible light irradiation of a xenon lamp. The 10% Pd/Bi2WO6 nanocomposites have the highest photocatalytic activity because Pd nanoparticles as electron acceptors promote interfacial charge-transfer through Pd/Bi2WO6 heterojunction.

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Section: Resultssupporting

confidence: 67%

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Phuruangrat

Teppetcharat

Patiphatpanya

et al. 2021

Preprint

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“…Various strategies have been therefore deployed to enhance the overall photocatalytic performance of BWO under sunlight irradiation. [32][33][34][35][36][37][38][39][40][41] Moreover, recently Lv et al 42 introduced surface oxygen vacancies into BWO via a controllable hydrogen reduction method and found that the photoresponse wavelength range was extended, and the photocatalytic activity was increased. Li et al 43 reported the creation of oxygen vacancies on flower-like BWO through an etching process using NaBH 4 as reducing agent and demonstrated that the resultant samples exhibited enhanced performance of photoelectrochemical water splitting.…”

Section: Introductionmentioning

confidence: 99%

Surface Disorder Engineering of Flake-Like Bi2WO6 Crystals for Enhanced Photocatalytic Activity

Wang

Yang

Wang

et al. 2019

Journal of Elec Materi

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The NaBH 4 reduction method has been used to engineer the surface of flakelike Bi 2 WO 6 (BWO) crystals with the aim of creating disordered surface structure and enhancing the photocatalytic activity. The disorder-engineered BWO samples were investigated by means of x-ray powder diffraction, fieldemission scanning electron microscopy, field-emission transmission electron microscopy, x-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, photoluminescence, electrochemical impedance spectroscopy and photocurrent response. Simulated sunlight, UV light and visible light were separately used as the light source to evaluate the photocatalytic activity of the samples toward the degradation of rhodamine B in aqueous solution. It is demonstrated that 0.03 M-BWO treated at 0.03 M NaBH 4 solution exhibits the highest photocatalytic activity, ca. 2.4 times higher than pristine BWO under simulated sunlight irradiation. The significant increase in the photocatalytic activity is observed at UV irradiation, which can be explained by the fact that the disordered surface states (formed in the forbidden gap of BWO) can act as electron acceptors to facilitate the separation of photogenerated electron/hole pairs. A slightly enhanced photocatalytic activity is observed under visible light irradiation, which is attributed to the enhanced visible light absorption induced by the disordered surface states. In addition, it is found that the treatment with high NaBH 4 concentrations is detrimental to the photocatalytic activity due to the creation of bulk defects in BWO crystals.

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“…International Journal of Photoenergy photoreduction synthesis time was 20 min, which was 3.60 times higher than that of pure Bi 2 WO 6 . The photocatalytic results were compared with the already-present related literature; the reaction rate constant of Ag/Bi 2 WO 6 synthesized by sonochemical methods [22] or ultrasonic vibration processes [23] was 0.0332 or 0.0279 min −1 , respectively. The reaction rate constant of Pt/Bi 2 WO 6 [24] using the photoreduction process similar to our synthesis method was 0.035 min −1 .…”

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confidence: 99%

Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi₂WO₆ Microspheres as an Efficient Visible Light Photocatalyst

Tan

Lan

et al. 2018

International Journal of Photoenergy

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A series of three-dimensional microflower-like Ag/Bi2WO6 composites were synthesized through a simple and practical photoreduction process with different photoreduction times. The UV-visible diffuse reflectance spectra indicate that the spectrum of Ag/Bi2WO6 is significantly red-shifted compared to pure Bi2WO6 microspheres in the visible light region. The photocatalytic activities of the as-prepared samples were evaluated by the decolorization of rhodamine B under visible light irradiation. The photocatalytic reaction rate constants of the Ag/Bi2WO6 with a photoreduction time of 20 min was 3.60 times bigger than those of pure Bi2WO6. The enhanced photocatalytic activity could be attributed to the synergistic effect of increased light absorption range and the effective separation of photogenerated carriers caused by Ag nanoparticles.

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Visible-light driven photocatalytic degradation of rhodamine B by Ag/Bi2WO6 heterostructures

Cited by 59 publications

References 15 publications

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Surface Disorder Engineering of Flake-Like Bi2WO6 Crystals for Enhanced Photocatalytic Activity

Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi₂WO₆ Microspheres as an Efficient Visible Light Photocatalyst

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Visible-light driven photocatalytic degradation of rhodamine B by Ag/Bi2WO6 heterostructures

Cited by 59 publications

References 15 publications

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

Surface Disorder Engineering of Flake-Like Bi2WO6 Crystals for Enhanced Photocatalytic Activity

Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi2WO6 Microspheres as an Efficient Visible Light Photocatalyst

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Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi₂WO₆ Microspheres as an Efficient Visible Light Photocatalyst