Investigation of the annealing treatment on the performance of TiO2 photoanode

Zhang, Shengqi; Zhang, Xiaoyan; Sun, Yi; Zhou, Wei; Cao, Weimin; Cheng, DingXin

doi:10.1016/j.ijhydene.2023.04.196

Cited by 11 publications

(2 citation statements)

References 52 publications

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“…In summary, WO 3 and BiVO 4 with monoclinic crystalline phases can be detected in the composites prepared via rotary evaporation and calcination. The diffraction peaks corresponding to the (1 1 2) crystal planes were considered, and the grain sizes of BiVO 4 and N-WO 3 /BiVO 4 were calculated using Scherrer’s formula as 27.9 and 27.7 nm. The diffraction peaks corresponding to the (2 0 0) crystal planes were considered, and the grain sizes of WO 3 and N-WO 3 /BiVO 4 were calculated using Scherrer’s formula as 37.6 and 33.6 nm.…”

Section: Resultsmentioning

confidence: 99%

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Li,

Tian,

Qian

et al. 2024

Ind. Eng. Chem. Res.

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A nitrogen-doped tungsten oxide/BiVO 4 (N-WO 3 / BiVO 4 ) heterojunction structure was obtained utilizing ammonium paratungstate as the nitrogen source and Bi(NO 3 ) 3 •5H 2 O as the bismuth source, exhibiting promising photoelectrochemical (PEC) performances and effectively obtaining a long photoresponse range into the visible light region. Notably, the UV−vis diffuse reflectance spectra of N-WO 3 /BiVO 4 (566 nm, 2.19 eV) exhibited a notable red shift of the absorption edge compared to that of WO 3 /BiVO 4 (516 nm, 2.47 eV). The N-WO 3 /BiVO 4 photoanode demonstrated an excellent photocurrent density of 0.78 mA cm −2 at 0.68 V vs Ag/AgCl, which surpassed those of the WO 3 /BiVO 4 (0.20 mA cm −2 ), pure WO 3 (0.25 mA cm −2 ), and pure BiVO 4 (0.03 mA cm −2 ) photoelectrodes. The improvement of the PEC performances was primarily due to the synergy of N doping and the involved heterojunction structure, suggesting that N doping increased the Vis-light response and the heterojunction structure promoted charge separation to improve the lifetime of photoinduced carriers.

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Section: Resultsmentioning

confidence: 99%

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Li,

Tian,

Qian

et al. 2024

Ind. Eng. Chem. Res.

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“…At the same time, annealing allows TiO 2 nanoparticles to have closer contact to shorten the path for photogenerated charges to transfer to the substrate. This separates and transfers charge carriers more effectively, resulting in a substantial transfer of holes to the substrate [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Photoanode Process Sequence on Efficiency of Dye-Sensitized Solar Cells

Wu,

Huang,

Tsai

et al. 2024

Coatings

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Owing to its contribution to carbon emission reduction, green energy has received widespread attention. Among green energy sources, solar energy is regarded as the most important. In solar energy production, dye-sensitized solar cells (DSSCs) have been favored owing to their characteristics of simple manufacturing and high efficiency as a third-generation solar cell technology. DSSCs are prospective candidates for powering indoor Internet of Things (IoT) devices. In this study, to find a method to enhance DSSCs’ efficiency, the advantages and disadvantages of the screen printing method and the mechanical pressing and annealing method were analyzed. Using an improved method, a TiO2 photoanode was processed and annealed, and the DSSCs with the photoanode showed an efficiency increase from 1.10 to 4.78%.

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Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction

Roh,

Kwak,

Hong

et al. 2024

SusMat

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As for the high sustainable solar hydrogen production via water splitting, transition metal doping on an oxide photoanode in photoelectrochemical (PEC) cells has been recognized as an effective approach. However, conventional thermal‐diffusion‐mediated doping strategies face the challenge of resolving sluggish catalytic kinetics for oxygen evolution reaction (OER) and its practical utilization for the synthesis of photoanode films. Herein, we introduce facile ultrafast flame‐boosted doping of Mo into a BiVO4 (FL MoBVO) film for 20 s to achieve an efficient PEC OER. Mo elements in a low‐valence state (i.e., Mo6−δ) and Mo6+ are successfully doped into the photoanode, which manipulate the energy band structure, facilitating the downward shift of band edges and promoting the surface catalytic kinetics. Consequently, the flame‐boosted Mo‐doping results in superior PEC performance in a mild environment with neutral electrolyte without introducing any other additives or co‐catalysts, where the photocurrent density at 1.23 VRHE under 1 sun illumination in pH 7 is outstandingly enhanced, over 9‐fold higher than that of a pristine BiVO4. The flame‐boosted doping induces significantly enhanced photoexcited charge transport and catalytic reaction kinetics performances simultaneously. Our report provides the effective strategy boosting both the thermodynamic and kinetic charge migration properties for sustainable materials.

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Investigation of the annealing treatment on the performance of TiO2 photoanode

Cited by 11 publications

References 52 publications

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Effect of Photoanode Process Sequence on Efficiency of Dye-Sensitized Solar Cells

Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction

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Investigation of the annealing treatment on the performance of TiO2 photoanode

Cited by 11 publications

References 52 publications

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO3/BiVO4 Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO3/BiVO4 Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Effect of Photoanode Process Sequence on Efficiency of Dye-Sensitized Solar Cells

Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction

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Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting

Architecture of a Long-Wavelength Visible–Light–Driven N-Doped WO₃/BiVO₄ Heterojunction Structure for Highly Efficient Photoelectrochemical Water Splitting