Mechanochemically synthesized m-BiVO<sub>4</sub> nanoparticles for visible light photocatalysis

Luo, Qinsheng; Zhang, Li; Chen, X.; Tan, Ooi Kiang; Leong, K. C.

doi:10.1039/c5ra28128h

Cited by 25 publications

(19 citation statements)

References 33 publications

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“…Note that 0.72 m 2 /g was measured for bulk ms-BiVO4 synthesized by a solid-state method [19,20]. In this work, the nanostructured ms-BiVO4 samples exhibited surface areas in accordance with those found in the literature for nano-sized powders: Ressnig et al [25]. Zircon-type BiVO4 has not been studied in a systematic way and only a few values of the specific area are available in the literature: 1.24 m 2 /g [8], 3 m 2 /g [9], 2.3 m 2 /g [26], 4.47 m 2 /g [27] and 5 m 2 /g [15].…”

Section: Thermal Properties Of Tz-bivo4 and Ms-bivo4 Nanoparticlessupporting

confidence: 84%

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: Thermal Properties Of Tz-bivo4 and Ms-bivo4 Nanoparticlessupporting

confidence: 84%

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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“…Inorganic semiconductors based on transition-metal oxides, oxysulfides or oxynitrides with lower bandgap as compared to TiO 2 can also be used to increase the absorption of visible-light [10][11][12]. Finally, the formation of heterojunctions with other semiconductors (Bi 2 WO 6 , m-BiVO 4 , TaON, Bi 2 O 3 , Ag 2 O, Ag 3 VO 4 …) [46][47][48][49][50][51] has been proposed to induce beneficial charge separation and electronic properties in the stack.…”

Section: Introductionmentioning

confidence: 99%

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

Cure¹,

Cocq

Mlayah

et al. 2019

International Journal of Hydrogen Energy

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This work proposes a new efficient, long-lasting scalable and low-cost triptych photocatalyst by assembling a semiconductor thin film (planar anatase TiO 2), a photosensitive molecule (Cbz) of the carbo-benzene family and plasmonic Ag nanoparticles with exquisite degree of intimacy with the semiconductor. Under simulated sunlight conditions over 48 h, the triptych TiO 2 /Ag/Cbz photocatalyst allows a hydrogen production rate of 0.18 mmol.g photocatalyst-1 .h-1 in conditions of applicative pressure (2.2 bars) and temperature (ambient) suitable for commercial applications. A ternary synergy (~33%) for hydrogen production is clearly evidenced with the triptych material in comparison with the diptych counterpart. The role of each component (TiO 2 , Ag and Cbz) on the H 2 production is investigated systematically by discriminating the light absorption from the different materials and interfaces. We show how to achieve an efficient vertical Schottky junction between Ag nanoparticles and the TiO 2 substrate that is demonstrated to be of crucial importance in the water-splitting process.

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“…BiVO 4 is intrinsically an n -type semiconductor that has a valance band position that is appropriate for visible-light activity 10 . Crystal polymorphs of BiVO 4 include; zircon structure with a tetragonal system (z-t), scheelite structures with monoclinic (s-m) and tetragonal (s-t) phases 11 . Among these three phases, the monoclinic phase has been reported to be thermodynamically stable and demonstrates good photoactivity properties 9 .…”

Section: Introductionmentioning

confidence: 99%

A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

Hlophe

Mahlalela

Dlamini

2019

Sci Rep

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The development of heterojunctions is the current focus of the scientific community as these materials are visible light active and the staggered positioning of their band edges combats electron-hole recombination which is the downside of most photocatalysts. In this work, a two- step hydrothermal synthesis protocol was utilized to fabricate a novel observable-light active material, composed of platelet-like BiVO 4 and a titanium-based metal organic framework (MOF) called MIL-125(Ti). The tuning of specific morphologies, such as platelet-like in BiVO 4 , provides the exposure of most reactive facets which are more reactive towards photooxidation of organics in water, thus increasing their efficiency. The as-synthesized heterojunction was characterized by Transmission electron microscopy (TEM), scanning transmission microscopy (SEM), X-Ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), X-Ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectra. The formation of the heterojunction lead to a positive shift of the 3-2 Bi:Ti valence band (VB) (1.78 eV) when compared to 1.27 eV VB position of BiVO 4 . The PL and photoelectrochemical measurements revealed that the heterojunction photocatalyst designated 3-2 Bi-Ti demonstrated inhibited recombination rate (platelet-like BiVO 4 > 3-2 Bi:Ti (PM) > MIL-125 > 1–1 Bi:Ti > 2–3 Bi:Ti > 3-2 Bi:Ti) and highly efficient interfacial charge shuttle between platelet-like BiVO 4 and MIL-125(Ti) through the formed n - n junction.

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Mechanochemically synthesized m-BiVO₄ nanoparticles for visible light photocatalysis

Abstract: Mechanochemical high energy ball milling approach was used to synthesize monoclinic BiVO4 (m-BiVO4) nanoparticles in an attempt to simultaneously reduce the particle size and improve the throughput for practical photocatalytic applications.

Cited by 25 publications

References 33 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

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

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Mechanochemically synthesized m-BiVO4 nanoparticles for visible light photocatalysis

Abstract: Mechanochemical high energy ball milling approach was used to synthesize monoclinic BiVO4 (m-BiVO4) nanoparticles in an attempt to simultaneously reduce the particle size and improve the throughput for practical photocatalytic applications.

Cited by 25 publications

References 33 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

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

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Mechanochemically synthesized m-BiVO₄ nanoparticles for visible light photocatalysis