Photocatalytic behaviour of Bi2MO6 polymetalates for rhodamine B degradation

Belver, Carolina; Adán, Cristina; Fernández-García, Marcos

doi:10.1016/j.cattod.2008.09.011

Cited by 89 publications

(43 citation statements)

References 47 publications

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“…Corresponding researches have thus been carried out experimentally and theoretically. The band gaps of Bi 2 MoO 6 and Bi 2 WO 6 have been evaluated experimentally to be 2.63 and 2.77 [28] or 2.58 and 2.79 eV [29] or 2.59 (uncalcined), 2.56 eV (calcined) [30] and 2.7 eV [31]. They all are within the visible-light range.…”

Section: Introductionmentioning

confidence: 99%

DFT calculations on structural and electronic properties of Bi2MO6 (M = Cr, Mo, W)

et al. 2011

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The electronic structure calculations were performed based on DFT for photocatalyst Bi 2 MO 6 (M = Cr, Mo and W). The band-gap nature of Bi 2 MO 6 is direct, and band-gaps are 1.045, 1.98 and 2.3 eV or 1.245, 1.96 and 2.2 eV, corresponding to whether adopt the Bi 5d states or not. The valence and conduction bands in all the three systems are mostly composed of M nd, O 2p and Bi 6p orbitals. Bi 5d states widen the valence-bands and conduction-bands of Bi 2 MoO 6 and Bi 2 WO 6 . Bi 5d states of Bi 2 CrO 6 narrow the valence-band, but do not change its conduction-band. The covalent behavior of Bi-O and M-O bonds is obvious in the three relaxed systems according to bond order values. Mulliken population analyses reveal that from Bi 2 CrO 6 to Bi 2 WO 6 , the atomic populations of Bi increase while those of M decrease, showing the reduction in oxidative capability of Bi 2 MO 6 .

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Section: Introductionmentioning

confidence: 99%

DFT calculations on structural and electronic properties of Bi2MO6 (M = Cr, Mo, W)

et al. 2011

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“…More and more efforts have been put in developing the anode materials with high catalytic efficiency and visible light response [4,5]. Bi 2 MoO 6 consisting of a layered structure with corner-shared MoO 6 units has arisen as a new visible light driven photocatalyst for O 2 evolution from an aqueous silver nitrate solution [6][7][8]. Its bandgap is ca.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation

Zhao¹,

Qu²,

Liu³

et al. 2009

Applied Catalysis B: Environmental

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“…The photocatalytic behavior of silver vanadates was evaluated by the photodegradation of Rhodamine B (RhB), a dye widely studied as a representative water pollutant [5]. Fig.…”

Section: Photocatalytic Degradation Of Rhbmentioning

confidence: 99%

“…In this sense, different metallates have been evaluated as promising photocatalysts for visible light absorption [1]. These materials are metal oxides with d 0 transition metals and ns 2 cations, and with lower band gap values capable of generating charge carriers to be involved in redox reactions [2,3,5]. However, these semiconductors have some disadvantages, such as poor textural properties, structural heterogeneity and high particle size, mainly caused by the synthesis procedures conventionally employed.…”

Section: Introductionmentioning

confidence: 99%

“…Following our previous works on the performance of visiblelight driven photocatalysts [4,5], this article will, therefore, concentrate on the synthesis of silver vanadates by a soft chemistry method testing their photoefficiency and performing their postreaction characterization. Different routes to obtain silver vanadates have been reported avoiding the solid-state reaction route that requires high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic behavior of silver vanadates: Microemulsion synthesis and post-reaction characterization

Belver

Adán

García-Rodríguez

et al. 2013

Chemical Engineering Journal

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h i g h l i g h t s" Silver vanadates were synthesized by microemulsion methodology not exceeding 110°C. " Silver metallic nanoparticles decorated the surface of the silver vanadates. " The photocatalytic properties were studied upon visible light. " The stability of catalysts was evaluated after reaction. " We report a synergistic effect between Ag 0 particles and silver vanadates. a r t i c l e i n f oArticle history: Available online 5 December 2012 Keywords:Silver vanadates Visible-light-driven photocatalysts Used-catalysts characterization Dye photodegradation a b s t r a c tSilver vanadates with light absorption properties in the visible region were successfully prepared by a low temperature pathway (not exceeding 110°C) using an optimized microemulsion methodology. The resulting materials were evaluated as photocatalysts in Rhodamine B photodegradation and characterized before and after reaction. The silver vanadates displayed silver metallic nanoparticles decorating the surface. The as-prepared Ag 3 VO 4 catalyst was the most active. Nevertheless, this silver vanadate suffered important changes during reaction. The initial structure evolves yielding a silver pyrovanadate, Ag 4-V 2 O 7 , with a concomitant increase of the number and size of the silver metallic nanoparticles. The synergy between these Ag 0 particles and the photoactivity of the Ag 4 V 2 O 7 phase seems responsible of the high photoactivity of this material.

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Photocatalytic behaviour of Bi2MO6 polymetalates for rhodamine B degradation

Cited by 89 publications

References 47 publications

DFT calculations on structural and electronic properties of Bi2MO6 (M = Cr, Mo, W)

DFT calculations on structural and electronic properties of Bi2MO6 (M = Cr, Mo, W)

Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation

Photocatalytic behavior of silver vanadates: Microemulsion synthesis and post-reaction characterization

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