Synthesis of WO3/BiVO4 photoanode using a reaction of bismuth nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation

Qing-yuan, Zeng; Li, Jinhua; Li, Linsen; Bai, Jing; Xia, Ligang; Zhou, Baoxue

doi:10.1016/j.apcatb.2017.05.072

Cited by 143 publications

(50 citation statements)

References 46 publications

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“…[113][114][115][116] These ternary catalysts exhibit much more prominent water oxidation capability due to the intimate contact of three composites and the synergistic effects among them. In most cases, the intermediate material between the photoanode and the Co-Pi works as a charge bridge between them [114][115][116] (such as what Figure 10a shows) or an electron trap [68] (like Figure 10b) to accelerate the charge separation. For instance, Yang and Wu [68] reported a Co-Pi/BiVO 4 /ZnO ternary system for water oxidation.…”

Section: Metal Phosphatesmentioning

confidence: 99%

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

et al. 2018

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Photo‐electrochemical (PEC) water splitting, as an essential and indispensable research branch of solar energy applications, has achieved increasing attention in the past decades. Between the two photoelectrodes, the photoanodes for PEC water oxidation are mostly studied for the facile selection of n‐type semiconductors. Initially, the efficiency of the PEC process is rather limited, which mainly results from the existing drawbacks of photoanodes such as instability and serious charge‐carrier recombination. To improve PEC performances, researchers gradually focus on exploring many strategies, among which engineering photoelectrodes with suitable cocatalysts is one of the most feasible and promising methods to lower reaction obstacles and boost PEC water splitting ability. Here, the basic principles, modules of the PEC system, evaluation parameters in PEC water oxidation reactions occurring on the surface of photoanodes, and the basic functions of cocatalysts on the promotion of PEC performance are demonstrated. Then, the key progress of cocatalyst design and construction applied to photoanodes for PEC oxygen evolution is emphatically introduced and the influences of different kinds of water oxidation cocatalysts are elucidated in detail. Finally, the outlook of highly active cocatalysts for the photosynthesis process is also included.

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Section: Metal Phosphatesmentioning

confidence: 99%

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

et al. 2018

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“…Similar phenomena are also observed on other system like WO 3 /BiVO 4 , where after compositing a thin BiVO 4 layer with WO 3 underlayer, the WO 3 /BiVO 4 exhibits lower onset potential and larger photocurrent than that of bare BiVO 4 . [46][47] Furthermore, after depositing NiFe-LDH as a co-catalyst, the onset potential is further negatively shifted of~0.05 V and the photocurrent is increased especially at relative lower potentials, suggesting that more holes can be easily extracted and take part in water oxidation reaction.…”

Section: Xrd Patterns Inmentioning

confidence: 99%

“…Therefore, application of a suitable scaffold for the hematite layer could be a feasible strategy to solve these problems at the same time. With a band gap of ∼2.7 eV and better electron conductivity than α‐Fe 2 O 3 , WO 3 appears to be an attractive choice as the support of hematite . WO 3 is also a common photoanode material .…”

Section: Introductionmentioning

confidence: 99%

“…With a band gap of~2.7 eV and better electron conductivity than α-Fe 2 O 3 , WO 3 appears to be an attractive choice as the support of hematite. [31][32] WO 3 is also a common photoanode material. [33] It can timely transport charge to suppress electron-hole recombination and the slightly larger band gap than hematite avoid competing for in the visible light range.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Tungsten Trioxide/Hematite Core‐Shell Nanoarrays for Efficient Photoelectrochemical Water Splitting

et al. 2018

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Hematite, with a band gap of 2.0∼2.2 eV suitable for visible light absorption, has emerged to be a promising photoanode material for photoelectrochemical (PEC) catalysis of the oxygen evolution reaction (OER). Herein, we proposed the design and fabrication of a WO3/α‐Fe2O3 core‐shell heterojunction structure, aiming at alleviating the severe mismatch between the relatively long light penetration depth and the extremely short holes diffusion length in α‐Fe2O3. The WO3 nanoarray underlayer is grown directly on the FTO substrate, serving as an effective electron transfer layer and additional light absorber. The α‐Fe2O3 layer is further prepared via spin‐coating and a subsequent calcination process as a thin and uniform shell. The loading amount was regulated with different spin coating times of the precursor. The optimized WO3/α‐Fe2O3 core‐shell nanoarrays display an excellent performance with lower onset potential of 0.65 V vs. RHE and increased photocurrent response of 1.29 mA cm−2 at 1.23 V vs. RHE, much superior than the pristine α‐Fe2O3 or WO3 photoanode. Characterizations demonstrate that both improved light absorption and formation of heterojunction account for the excellent performance. After coating a NiFe‐LDH co‐catalyst layer, the oxygen evolution reaction is further enhanced, and high stability is achieved, benefiting from the efficient charge carrier generation, promoted charge separation in the semiconductor and the rapid consumption of holes for surface reaction.

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“…Thus, oxygen evolution is considered as the rate-determining step in photocatalytic overall water splitting process. So far only few semiconductors such as WO 3 , BiVO 4 , have been employed as photocatalysts for oxygen production from water splitting (Xin et al, 2009; Wu et al, 2016; Zeng et al, 2017; He et al, 2018). Due to the limitations of band structures and light-harvesting properties in the visible light region, the utilization of sing-component semiconductors as catalysts for oxygen evolution has encountered serious difficulties, the design and development of novel composite materials for solar-driven photocatalytic water splitting are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Insights Into Highly Improved Solar-Driven Photocatalytic Oxygen Evolution Over Integrated Ag3PO4/MoS2 Heterostructures

et al. 2018

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Oxygen evolution has been considered as the rate-determining step in photocatalytic water splitting due to its sluggish four-electron half-reaction rate, the development of oxygen-evolving photocatalysts with well-defined morphologies and superior interfacial contact is highly important for achieving high-performance solar water splitting. Herein, we report the fabrication of Ag3PO4/MoS2 nanocomposites and, for the first time, their use in photocatalytic water splitting into oxygen under LED light illumination. Ag3PO4 nanoparticles were found to be anchored evenly on the surface of MoS2 nanosheets, confirming an efficient hybridization of two semiconductor materials. A maximum oxygen-generating rate of 201.6 μmol · L−1 · g−1 · h−1 was determined when 200 mg MoS2 nanosheets were incorporated into Ag3PO4 nanoparticles, which is around 5 times higher than that of bulk Ag3PO4. Obvious enhancements in light-harvesting property, as well as electron-hole separation and charge transportation are revealed by the combination of different characterizations. ESR analysis verified that more active oxygen-containing radicals generate over illuminated Ag3PO4/MoS2 composite photocatalysts rather than irradiated Ag3PO4. The improvement in oxygen evolution performance of Ag3PO4/MoS2 composite photocatalysts is ascribed to wide spectra response in the visible-light region, more efficient charge separation, and enhanced oxidation capacity in the valence band (VB). This study provides new insights into the design and development of novel composite photocatalytic materials for solar-to-fuel conversion.

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Synthesis of WO3/BiVO4 photoanode using a reaction of bismuth nitrate with peroxovanadate on WO3 film for efficient photoelectrocatalytic water splitting and organic pollutant degradation

Cited by 143 publications

References 46 publications

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

Synthesis of Tungsten Trioxide/Hematite Core‐Shell Nanoarrays for Efficient Photoelectrochemical Water Splitting

Insights Into Highly Improved Solar-Driven Photocatalytic Oxygen Evolution Over Integrated Ag3PO4/MoS2 Heterostructures

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