Hydrothermal synthesis of phosphate-doped BiVO4 with exposed (010) facets and enhanced sunlight-driven photocatalytic properties

Liu, Wei; Zhao, Guosheng; Dong, Man; Liu, Anmin; Chang, Limin

doi:10.1016/j.matlet.2016.01.146

Materials Letters

2016

DOI: 10.1016/j.matlet.2016.01.146

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Hydrothermal synthesis of phosphate-doped BiVO4 with exposed (010) facets and enhanced sunlight-driven photocatalytic properties

Wei Liu

Guosheng Zhao

Man Dong

et al.

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Cited by 17 publications

(2 citation statements)

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“…[41]. Moreover, for Ag/BVP (2%), several Ag nanoparticles around 20-70 nm were verified to selectively deposited onto the (010) facet of BVP.…”

mentioning

confidence: 86%

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Fu¹,

Xu²,

Li³

et al. 2021

Nanotechnology

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BiVO4, a visible-light response photocatalyst, has shown tremendous potential because of abundant raw material sources, good stability and low cost. There exist some limitations for further applicaitions due to poor capability to separate electron–hole pairs. In fact, a single-component modification strategy is barely adequate to obtain highly efficient photocatalytic performance. In this work, P substituted some of the V atoms from VO4 oxoanions, namely P was doped into the V sites in the host lattice of BiVO4 by a hydrothermal route. Meanwhile, Ag as an attractive and efficient electron-cocatalyst was selectively modified on the (010) facet of BiVO4 nanosheets via facile photo-deposition. As a result, the obtained dually modified BiVO4 sheets exhibited enhanced photocatalytic degradation property of methylene blue (MB). In detail, photocatalytic rate constant (k) was 2.285 min−1 g−1, which was 2.78 times higher than pristine BiVO4 nanosheets. Actually, P-doping favored the formation of O vacancies, led to more charge carriers, and facilitated photocatalytic reaction. On the other hand, metallic Ag loaded on (010) facet effectively transferred photogenerated electrons, which consequently helped electron–hole pairs separation. The present work may enlighten new thoughts for smart design and controllable synthesis of highly efficient photocatalytic materials.

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“…[41]. Moreover, for Ag/BVP (2%), several Ag nanoparticles around 20-70 nm were verified to selectively deposited onto the (010) facet of BVP.…”

mentioning

confidence: 86%

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Fu¹,

Xu²,

Li³

et al. 2021

Nanotechnology

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“…[7][8][9] In particular, phosphate doping can influence the crystal growth of BiVO 4 and provide an internal electric field, which is conducive to the separation of photogenerated electron-hole pairs. 7,10 However, doping always introduces new charge recombination centers, hence impedes charge transport. 11 Many oxygen evolution catalysts (OECs) are loaded on element doped BiVO 4 to accelerate the surface reaction kinetics, such as FeOOH and Co-Pi, 12,13 since OECs can utilize a great number of photogenerated holes at the semiconz E-mail: wanghui@bjfu.edu.cn; bian@bnu.edu.cn ductor/liquid junction for the photo-oxidation.…”

mentioning

confidence: 99%

Enriched Photoelectrochemical Performance of Phosphate Doped BiVO₄Photoelectrode by Coupling FeOOH and rGO

Qiu

Song

Wang

et al. 2017

J. Electrochem. Soc.

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Bismuth vanadate is a promising photoanode with a set of intrinsic limitations for water oxidation and photoelectrochemical degradation of organic pollution. FeOOH/P:BiVO 4 /rGO composite with a considerably small charge-transfer resistance was successfully developed by doping the BiVO 4 lattice with phosphate (P:BiVO 4 ), photo-depositing FeOOH nanoparticles on P:BiVO 4 nanoparticles, and grafting reduced graphene oxide (rGO) onto the surface of P:BiVO 4 , in that order. This composite photoelectrode significantly improves photoelectrochemical performance originating from its effective suppression on electron-hole recombination and charge transfer at the semiconductor/electrolyte interface. The photoelectrocatalysts were systematically characterized by FTIR, XPS, SEM, TEM, UV-vis and XRD. The characterization results show that FeOOH/P:BiVO 4 /rGO consisted of spherical agglomerates comprising a large number of P:BiVO 4 nanoparticles with an average size of approximately 10 nm. FeOOH nanoparticles were successfully loaded onto the surface of P:BiVO 4 nanoparticles, and rGO layers with a thickness of approximately 4 nm were coated onto the P:BiVO 4 particles. The enhanced photoelectrochemical properties were observed using linear sweep voltammetry. The mechanism underlying the observed photoelectrocatalytic activity enhancement was determined using Mott-Schottky analysis and electrochemical impedance spectroscopy. The photocurrent density of FeOOH/P:BiVO 4 /rGO in a Na 2 SO 4 solution with 2,4-dichlorophenol (2,4-DCP) at 0.6 V Ag/AgCl is approximately 100 times higher than that of P:BiVO 4 ; the onset potentials of FeOOH/P:BiVO 4 /rGO (0.008 V Ag/AgCl ) is 5 times lower than that of P:BiVO 4 (0.043 V Ag/AgCl ). It is suggested that FeOOH/P:BiVO 4 /rGO obtains the highest photoelectrocatalytic performance for 2,4-DCP degradation. The proposed mechanism is that the synergistic effect between FeOOH and rGO can alleviate two main limitations of P:BiVO 4 : suppression on the bulk recombination and interfacial recombination formed at the P:BiVO 4 -FeOOH junction and effective charge transfer at the semiconductor/electrolyte interface. Environmental pollution by chlorinated phenols (CPs) has become one of the most important worldwide issues. Because many types of CPs are resistant to physical, chemical, and biological treatment processes, and their accumulation poses a threat to living organisms, including human beings. 1 Many studies have been devoted to developing effective methods to degrade CPs, such as photocatalytic oxidation, 2 photoelectrochemical (PEC) technology, 3 and electrochemical oxidation-reduction. 4 Notably, PEC technology is regarded as not only a promising solution to the increasing energy demand, but also an effective wastewater treatment. Developing a practical and effective photoelectrocatalyst that can be used under moderate reaction conditions, exhibits high degradation efficiency, and requires low energy cost is important. One of the most promising photoanode materials, monoclinic BiVO 4 exhibi...

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Bismuth vanadate-based semiconductor photocatalysts: a short critical review on the efficiency and the mechanism of photodegradation of organic pollutants

Monfort

Plesch

2018

Environ Sci Pollut Res

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The number of publications on photocatalytic bismuth vanadate-based materials is constantly increasing. Indeed, bismuth vanadate is gaining stronger interest in the photochemical community since it is a solar-driven photocatalyst. However, the efficiency of BiVO-based photocatalyst under sunlight is questionable: in most of the studies investigating the photodegradation of organic pollutants, only few works identify the by-products and evaluate the real efficiency of BiVO-based materials. This short review aims to (i) present briefly the principles of photocatalysis and define the photocatalytic efficiency and (ii) discuss the formation of reactive species involved in the photocatalytic degradation process of pollutants and thus the corresponding photodegradation mechanism could be determined. All these points are developed in a comprehensive discussion by focusing especially on pure, doped, and composite BiVO. Therefore, this review exhibits a critical overview on different BiVO-based photocatalytic systems with their real efficiency. This is a necessary knowledge for potential implementation of BiVO materials in environmental applications at larger scale than laboratory conditions.

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Hydrothermal synthesis of phosphate-doped BiVO4 with exposed (010) facets and enhanced sunlight-driven photocatalytic properties

Cited by 17 publications

References 20 publications

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Enriched Photoelectrochemical Performance of Phosphate Doped BiVO₄Photoelectrode by Coupling FeOOH and rGO

Bismuth vanadate-based semiconductor photocatalysts: a short critical review on the efficiency and the mechanism of photodegradation of organic pollutants

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Hydrothermal synthesis of phosphate-doped BiVO4 with exposed (010) facets and enhanced sunlight-driven photocatalytic properties

Cited by 17 publications

References 20 publications

Highly efficient BiVO4 single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Highly efficient BiVO4 single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Enriched Photoelectrochemical Performance of Phosphate Doped BiVO4Photoelectrode by Coupling FeOOH and rGO

Bismuth vanadate-based semiconductor photocatalysts: a short critical review on the efficiency and the mechanism of photodegradation of organic pollutants

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Product

Resources

About

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Highly efficient BiVO₄ single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification

Enriched Photoelectrochemical Performance of Phosphate Doped BiVO₄Photoelectrode by Coupling FeOOH and rGO