Enhanced long-wavelength transient photoresponsiveness of WO3 induced by tellurium doping

Yang, Bin; Luca, Vittorio

doi:10.1039/b807629d

Cited by 33 publications

(16 citation statements)

References 14 publications

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“…The incorporation of nonmetallic dopants, such as C, N, S, and so on, have been proven to be effective to reduce the band gap of semiconductors and improve the visible light harvesting ability of WO 3 photoanodes . For example, Mullins et al prepared S doped WO 3 by a spray pyrolysis method .…”

Section: Dopingmentioning

confidence: 99%

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Wang

Tian

Chen

et al. 2019

Adv Funct Materials

142

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To address the energy crisis and environmental problems, the applications of solar energy have received intensive attention. Converting solar energy to hydrogen using a photoelectrochemical (PEC) cell is one of the most promising approaches to meet future energy demands. As an earth abundant metal oxide, tungsten trioxide (WO3), which has a moderate band gap (2.5–2.7 eV), ideal valence band position, and high resistance to photocorrosion, has been widely utilized in PEC photoanodes. To obtain a WO3 photoanode with high PEC efficiency, tremendous efforts have been made to improve the light absorption capacity, charge carrier dynamics, and oxygen evolution activity. In this report, the recent advances in WO3 photoanode optimization, including morphology design, dopants doping, heterojunction fabrication, and surface modification are summarized. In this review, these developments and representative applications of WO3 photoanodes in unassisted water splitting devices are also discussed. Finally, perspectives on the significant challenges and future prospects for the development of WO3 photoanodes for PEC water splitting are provided.

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Section: Dopingmentioning

confidence: 99%

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Wang

Tian

Chen

et al. 2019

Adv Funct Materials

142

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“…167,168 The effect of several transition metals on the photocatalytic activity under UV irradiation was also studied, suggesting maximum H 2 production via Ni doping with WO 3 . 169 Doping with other metals (Ti, Zn, Dy, Te, Ta, V, Cu, Ag, and Ce) has also been reported in the literature, [170][171][172][173][174][175][176][177][178] with some claims of improved photocatalytic activity. For example, Wang et al 179 studied Mo, Cr, Ti, Zr, and Hf-doped WO 3 and found that in Hf-doped WO 3 , the oxygen vacancies have a negative formation energy, which leads to a shi in both the VB and CB to higher energies and a reduction of the band gap, with potential benets for photocatalytic H 2 production, as shown in Fig.…”

Section: Theoretical Achievements For the Development Of Nanophotocatmentioning

confidence: 85%

Nanomaterials for photocatalytic hydrogen production: from theoretical perspectives

Bhatt

Lee

2017

RSC Adv.

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“…Similar results have been also reported for pure WO 3 and doped WO 3 photoanodes by others. [26][27][28] Consequently, Au:WO 3 nanocomposite photoanodes with 1 mol% of gold exhibited the highest activity during the PEC water splitting reaction.…”

Section: Photoelectrochemical Measurementsmentioning

confidence: 94%

To What Extent Can Surface Morphology Influence the Photoelectrochemical Performance of Au:WO₃ Electrodes?

et al. 2015

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Considering hydrogen as a future fuel, development of clean energy sources based on solar power is the main human challenge in recent years. Here, for the first time, Au:WO 3 photoanodes are synthesized with different Au concentrations and then applied for photoelectrochemical (PEC) water splitting. A comprehensive statistical study on the prepared photoanode surface is conducted to understand the correlation between surface morphology and PEC activity, using atomic force microscopy (AFM). The results clearly justified the maximum surface area observed for the film containing 1 mol% Au. Additionally, X-ray diffraction (XRD) analysis determined that Au nanocrystals have been formed in cubic structure with the size of 29-52 nm. X-ray photoelectron spectroscopy (XPS) revealed that the presence of Au in a combined metal/oxide state strongly affects on the Au:WO 3 photoanode performance.Photoresponse investigation of the synthesized films showed that the highest photocurrent was obtained for the sample containing 1 mol% gold with the maximum incident photon to current efficiency (IPCE) of about 20% at 360 nm wavelength. In addition, measuring the amount of hydrogen produced in the water splitting reaction supports that the sample containing 1 mol% Au exhibits the highest hydrogen production rate (~3µmol/h) as compared to other samples.

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Enhanced long-wavelength transient photoresponsiveness of WO3 induced by tellurium doping

Abstract: Tungsten trioxide (WO3) films doped with 0.25 atom% tellurium synthesised by a sol-gel route, show strong transient photocurrents under chopped sub-bandgap illumination (hnu=1.8 eV

Cited by 33 publications

References 14 publications

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Nanomaterials for photocatalytic hydrogen production: from theoretical perspectives

To What Extent Can Surface Morphology Influence the Photoelectrochemical Performance of Au:WO₃ Electrodes?

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Enhanced long-wavelength transient photoresponsiveness of WO3 induced by tellurium doping

Abstract: Tungsten trioxide (WO3) films doped with 0.25 atom% tellurium synthesised by a sol-gel route, show strong transient photocurrents under chopped sub-bandgap illumination (hnu=1.8 eV

Cited by 33 publications

References 14 publications

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Tungsten Trioxide Nanostructures for Photoelectrochemical Water Splitting: Material Engineering and Charge Carrier Dynamic Manipulation

Nanomaterials for photocatalytic hydrogen production: from theoretical perspectives

To What Extent Can Surface Morphology Influence the Photoelectrochemical Performance of Au:WO3 Electrodes?

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To What Extent Can Surface Morphology Influence the Photoelectrochemical Performance of Au:WO₃ Electrodes?