Dip-coating synthesis of P-doped BiVO4 photoanodes with enhanced photoelectrochemical performance

Xia, Teng; Chen, Min; Xiao, Lisong; Fan, Weiqiang; Mao, Baodong; Xu, Dongbo; Guan, Peng; Zhu, Jianjun; Shi, Weidong

doi:10.1016/j.jtice.2018.09.003

Cited by 36 publications

(19 citation statements)

References 53 publications

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“…The magnified patterns of ( 121) and (040) peaks in Figure 2(b) exhibited much more obvious shifts toward lower angles for BVP-1 and Ag/BVP (2%). This phonomenon may due to the change in the local crystal structures caused by P-doping, which as well as indicated that some amount of V 5+ has been well substituted by P 5+ without formation of any segregated impurities in the host BVO lattice [19,32,47,53]. The diffraction peaks of Ag in The morphologies of BVO and Ag/BVP (2%) were observed by SEM in Figure 3 (a, b), respectively.…”

Section: Morphology and Microstructure Of Ag/bvp Sheetsmentioning

confidence: 98%

“…In detail, some computational studies revealed that P doping could stabilize O vacancy structures by forming a defect complex, leading to higher concentrations of O vacancy. Subsequently, more O vacancies improved reducibility of the photocatalyst, which, in turn, increased the amount of charge carriers and increased the electronic conductivity, which could lead to superior photocatalytic activity [19,30,32,47]. Other reports argued about the locations of O vancancy determining their functions [10,29,31] In order to to illustrate the effect of Ag, the MB degradation rate of Ag/BVP (2%) was futher tested under two different wavelenghths of LED lamps (600 and 480 nm, respectively).…”

Section: Photocatalytic Performance and Mechanismmentioning

confidence: 99%

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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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Section: Morphology and Microstructure Of Ag/bvp Sheetsmentioning

confidence: 98%

Section: Photocatalytic Performance and Mechanismmentioning

confidence: 99%

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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“…Element doping is an important strategy for enhancing the PEC efficiency of BiVO 4 photoanode. [5][6][7][8] Among many doping elements, tungsten (W) belongs to VIA element, and its outer orbit is more inclined to 5d 4 6s 2 , while the d orbit can be considered as unfilled state. Therefore, it can be speculated that the conductivity of BiVO 4 may be improved after W-doping, which further benefits for the carriers' mobility and separation.…”

Section: Introductionmentioning

confidence: 99%

“…BiVO 4 takes many advantages, such as narrow band gap, visible light responding ability, and so forth, but its no‐negligible limitation causes the low mobility and separation of photogenerated carries. Element doping is an important strategy for enhancing the PEC efficiency of BiVO 4 photoanode 5‐8 . Among many doping elements, tungsten (W) belongs to VIA element, and its outer orbit is more inclined to 5d 4 6s 2 , while the d orbit can be considered as unfilled state.…”

Section: Introductionmentioning

confidence: 99%

A simple flame strategy for constructing W‐doped BiVO ₄ photoanodes with enhanced photoelectrochemical water splitting

et al. 2020

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Summary Bismuth vanadate (BiVO4) with narrow band gap has been widely reported in photoelectrochemical (PEC) water splitting. However, the low kinetic of water splitting is still the key for limiting the PEC performance of BiVO4. Herein, a W‐doped BiVO4 (W‐BVO) photoanode has been controllably prepared by a fast flame method within 40 seconds. The preparation condition including calcination time and quantity of W precursor has been systemically investigated, in order to optimize the PEC performance of W‐BVO. X‐ray photoelectron spectroscopy indicates that the introduction of W did not obviously cause the formation of oxygen vacancies, revealing that W has been doped into the crystal structure of BiVO4 by flame method. The electrochemical impedance spectroscopy further confirmed that the W‐BVO possesses a lower charge transfer resistance with fast transfer ability of carriers. Based on the incident photon‐to‐electron conversion efficiency, the acceptable solar to electron conversion efficiency of 5.79% (340 nm, 1.23 V vs RHE) has been achieved in the W‐BVO system. A PEC mechanism has been proposed to demonstrate the promotion of kinetic for PEC water splitting. This work offers a promising alternative route for the design and fabrication of efficient photoanodes in other PEC systems.

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“…4a) correspond to Bi 4f 7/2 and Bi 4f 5/2 , respectively. 34 The primary peaks of V 2p at 516.5 and 524.1 eV are typically assigned to the V 2p 3/2 and V 2p 5/2 of V 5+ (Fig. 4b).…”

mentioning

confidence: 98%

Fabrication of an amorphous metal oxide/p-BiVO₄ photocathode: understanding the role of entropy for reducing nitrate to ammonia

Wang

Ding

Bai

et al. 2022

Inorg. Chem. Front.

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Dip-coating synthesis of P-doped BiVO4 photoanodes with enhanced photoelectrochemical performance

Cited by 36 publications

References 53 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

A simple flame strategy for constructing W‐doped BiVO ₄ photoanodes with enhanced photoelectrochemical water splitting

Fabrication of an amorphous metal oxide/p-BiVO₄ photocathode: understanding the role of entropy for reducing nitrate to ammonia

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Dip-coating synthesis of P-doped BiVO4 photoanodes with enhanced photoelectrochemical performance

Cited by 36 publications

References 53 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

A simple flame strategy for constructing W‐doped BiVO 4 photoanodes with enhanced photoelectrochemical water splitting

Fabrication of an amorphous metal oxide/p-BiVO4 photocathode: understanding the role of entropy for reducing nitrate to ammonia

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Product

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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

A simple flame strategy for constructing W‐doped BiVO ₄ photoanodes with enhanced photoelectrochemical water splitting

Fabrication of an amorphous metal oxide/p-BiVO₄ photocathode: understanding the role of entropy for reducing nitrate to ammonia