Hydrothermal preparation of BiVO4 photocatalyst with perforated hollow morphology and its performance on methylene blue degradation

Ma, Weiqian; Li, Zhilin; Liu, Wei

doi:10.1016/j.ceramint.2014.11.123

Cited by 49 publications

(12 citation statements)

References 24 publications

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“…Among non-titania (TiO2)-based visible-light driven photocatalysts, considerable research has been devoted to bismuth vanadate (BiVO4) [1][2][3][4]. Mainly, studies have focused on monoclinic BiVO4 and it has proved to be an excellent material for use (under visible-light illumination) in photocatalytic water splitting and photocatalytic degradation of organic compounds (air/water pollutants) [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate

Dolić

Jovanović

Šmits

et al. 2018

Ceramics International

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Monoclinic scheelite-type BiVO4 is currently considered as one of the most promising non-titania photocatalysts, wheras tetragonal zircon-type BiVO4 is still poorly understood. Herein, a new and simple synthetic approach was applied and nanostructured single-phase zircon-type BiVO4 was successfully prepared by a controllable ethylene-glycol colloidal route. In addition, nanostructured monoclinic scheelite-type BiVO4 powders were also fabricated through annealing of the as-prepared samples. A comparative study of the two BiVO4 polymorphs was conducted and it turned out that the novel synthetic approach had a significant impact on porosity and photocatalytic performance of zircon-structured BiVO4. All the prepared materials, as-prepared and annealed, were meso-porous, while measured values of specific surface area of some zirconstructured samples (∼34 m 2 /g) were ∼7 times higher than those reported thus far for this phase. Interestingly, for the first time, zircon-type BiVO4, previously considered to be a poor photocatalyst, exhibited a better overall performance in degradation of methyl orange compared to monoclinic scheelite-type BiVO4. Hence, it could be expected that the here-presented synthesis and observations will both arouse interest in scarcely studied tetragonal zircon-type BiVO4 and facilitate as well as speed up further research of its properties.

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Section: Introductionmentioning

confidence: 99%

A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate

Dolić

Jovanović

Šmits

et al. 2018

Ceramics International

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“…However this propensity for phase transition is detrimental to the enhancement of these materials' functionality. For example, efforts to enhance the photocatalytic property of tungstates [1][2][3][4], tantalates [5][6][7][8], vanadates [9][10][11][12][13], and titanates [14][15][16][17][18][19][20] are shown to be limited by the vulnerability of transition prone crystalline phases. Evidently, the slightest phase gradient such as a single intrinsic defect can have significant effects on the functionality of a material because it only takes one to be a charge trap that significantly increases the recombination rates.…”

Section: Introductionmentioning

confidence: 99%

Free energy landscape approach to aid pure phase synthesis of transition metal (X=Cr, Mn and Fe) doped bismuth titanate (Bi2Ti2O7)

Mayfield

Huda

2016

Journal of Crystal Growth

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A density functional theory study of Cr, Mn and Fe substitutions in Bi 2 Ti 2 O 7 (BTO) photocatalysts is presented. We performed a stability analysis from our total energy calculations and have determined formations of dopant inspired phases are detrimental to the overall photocatalytic performance of X-doped BTO. From our calculated formation energies and electronic structures it is shown that X substitution of Ti is least stable and should be associated with formation of secondary phases more so than X substitution of Bi. This result contradicts the many experimental studies which suggest transition metal dopants always substitute Ti in BTO, but on the other hand, explains the poor photocatalytic response beyond what has become known as the critical dopant concentration.

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“…The BiVO 4 samples were synthesized according to Ma et al (2015). Solution A contained 6.0 mmol of Bi(NO 3 ) 3 .5H 2 O dissolved in 20 mL of 4 M HNO 3 .…”

Section: Synthesis Of Bivomentioning

confidence: 99%

A Fair Comparison Between Bismuth Catalysts for Application in Photodegradation Under Visible and Solar Light

Ribeiro

Brandestini

Moro

et al. 2019

Braz. J. Chem. Eng.

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Three different bismuth catalysts (Bi 2 WO 6 , BiOI and BiVO 4 ) were synthesized using solvoand hydrothermal methods. Different reaction times, calcination and the addition of poly (vinyl pyrrolidone) during synthesis were tested to investigate the effect of these variables on the catalysts' morphology and photocatalytic activity. The photocatalytic activity was evaluated using the degradation of rhodamine B dye under both visible light and natural solar radiation. The Bi 2 WO 6 samples presented good crystallinity and morphological similarities, despite having undergone different treatments. The BiOI and Bi 2 WO 6 catalysts presented a spherical shape, and no morphological difference was observed as a result of the addition of PVP. The BiVO 4 sample presented a parallelepiped shape. BiOI containing PVP and ethylene glycol was the catalyst that presented the highest activity, while BiVO 4 presented the lowest. In experiments using scavengers, photogenerated holes demonstrated a key role in dye degradation.

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Hydrothermal preparation of BiVO4 photocatalyst with perforated hollow morphology and its performance on methylene blue degradation

Cited by 49 publications

References 24 publications

A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate

A comparative study of photocatalytically active nanocrystalline tetragonal zyrcon-type and monoclinic scheelite-type bismuth vanadate

Free energy landscape approach to aid pure phase synthesis of transition metal (X=Cr, Mn and Fe) doped bismuth titanate (Bi2Ti2O7)

A Fair Comparison Between Bismuth Catalysts for Application in Photodegradation Under Visible and Solar Light

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