Highly effective and stable Ag3PO4–WO3/MWCNTs photocatalysts for simultaneous Cr(VI) reduction and orange II degradation under visible light irradiation

Cai, Li; Xiong, Xiaoli; Ninggang, Liang; Long, Qiyi

doi:10.1016/j.apsusc.2015.07.028

Cited by 60 publications

(14 citation statements)

References 47 publications

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“…These asymmetric peaks were fitted as described in Figure b–d at 367.13/367.97 eV for Ag 3d5/2 and at 373.14/373.98 eV for Ag 3d3/2. The high‐intensity peaks at 367.13 and 373.14 eV correspond to Ag + ions, whereas the low‐intensity peaks at 367.97 and 373.98 eV are associated with metallic Ag …”

Section: Resultsmentioning

confidence: 99%

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Santos

Assis

Machado

et al. 2019

Part & Part Syst Charact

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In this work, for the first time, the instantaneous nucleation and growth processes of Ag nanoparticles on Ag3PO4 mediated by femtosecond laser pulses are reported and analyzed. The investigated samples are pure Ag3PO4 sample, electron‐irradiated Ag3PO4 sample, and laser‐irradiated sample. Complete characterization of the samples is performed using X‐ray diffraction (XRD), Rietveld refinements, field emission scanning electron microscopy, and energy dispersive spectroscopy (EDS). XRD confirms that the irradiated surface layer remains crystalline, and according to EDS analysis, the surface particles are composed primarily of Ag nanoparticles. This method not only offers a one‐step route to synthesize Ag nanoparticles using laser‐assisted irradiation with particle size control, but also reports a complex process involving the formation and subsequent growth of Ag nanoparticles through an unexpected additive‐free in situ fabrication process.

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Section: Resultsmentioning

confidence: 99%

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Santos

Assis

Machado

et al. 2019

Part & Part Syst Charact

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show abstract

“…The integer n depends on the characteristics of the optical transition in the semiconductor (n = 1 for direct transition and n = 4 for indirect transition). The optical transition type of ZnO, AgBr, and Ag 3 PO 4 is indirect (n = 4) [34][35][36]. Figure 4b shows the plots of (αhυ) 1 indicates that the recombination of charge carriers in the quaternary nanocomposite has been effectively suppressed.…”

Section: Preparation Of the Samplesmentioning

confidence: 91%

Photosensitization of Fe3O4/ZnO by AgBr and Ag3PO4 to fabricate novel magnetically recoverable nanocomposites with significantly enhanced photocatalytic activity under visible-light irradiation

Shekofteh-Gohari

Habibi‐Yangjeh

2016

Ceramics International

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“…Thus, by applying sufficient light, the electron and holes can easily move in opposite directions from CB of A 3 PO 4 and VB of WO 3 to the corresponding energy levels of WO 3 and Ag 3 PO 4 , respectively. This phenomenon not only improves the photocatalytic performance by retarding the recombination of the charge carriers but also enhances the stability of metal phosphate by depleting the required electrons for reduction of silver ion to metallic silver and preventing from Ag 3 PO 4 photo‐corrosion . Another widely used photocatalyst, ZnO, has the appropriate features of chemically and structurally stable, eco‐friendly nature, low cost, suitable quantum efficiency, and acceptable mobility of the charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

2019

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Summary Using statistical mixture design, the best composition of a heterojunction photocatalyst containing ZnO, Ag3PO4, and WO3 was determined to maximize the sunlight driven ammonia removal from aqueous solution via both photocatalysis and adsorption processes. All samples were prepared by coprecipitation and immobilized over perlite granules as floatable support. X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), field emission scanning electron microscope (FESEM), Brunauer, Emmett, and Teller (BET), ultraviolet–visible (UV‐vis), and photoluminescence (PL) analyses were used to characterize the catalysts. Three responses of ammonia removal by photocatalysis, adsorption, and the total ammonia removal were modeled by special cubic models, and the ANOVA confirmed the significance of them. The maximum ammonia removal, approximately 88%, was obtained by photocatalyst composed of 32.93‐wt% WO3, 41.82‐wt% Ag3PO4, and 25.26‐wt% ZnO. The contribution of photocatalysis and adsorption was estimated to be 72.74% and 14.44%, respectively, indicating the dominance of photocatalysis process. According to kinetic study, the optimum photocatalyst showed the highest apparent rate constant and lowest half‐life time of ammonia removal. The maximum quantum yield of 1.7% was calculated from the best photocatalyst composite at the maximum intensity of visible light received from sunlight. The reuse ability test revealed that the optimum ternary photocatalyst is suitable for wastewater treatments in practical applications.

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Highly effective and stable Ag3PO4–WO3/MWCNTs photocatalysts for simultaneous Cr(VI) reduction and orange II degradation under visible light irradiation

Cited by 60 publications

References 47 publications

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Photosensitization of Fe3O4/ZnO by AgBr and Ag3PO4 to fabricate novel magnetically recoverable nanocomposites with significantly enhanced photocatalytic activity under visible-light irradiation

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

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Highly effective and stable Ag3PO4–WO3/MWCNTs photocatalysts for simultaneous Cr(VI) reduction and orange II degradation under visible light irradiation

Cited by 60 publications

References 47 publications

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag3PO4 Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag3PO4 Induced by Electron Beam and Femtosecond Laser

Photosensitization of Fe3O4/ZnO by AgBr and Ag3PO4 to fabricate novel magnetically recoverable nanocomposites with significantly enhanced photocatalytic activity under visible-light irradiation

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO 3 ‐Ag 3 PO 4 ‐ZnO ternary photocatalysts

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Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts