Rational Band Gap Engineering of WO<sub>3</sub> Photocatalyst for Visible light Water Splitting

Wang, Fenggong; Valentin, Cristiana Di; Pacchioni, Gianfranco

doi:10.1002/cctc.201100446

Cited by 158 publications

(82 citation statements)

References 22 publications

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“…The slight difference of band gap between two samples is because that several Hf atoms are embedded in the WO3 lattice, which is consistent with the result of DFT calculation in the work of Valentin et al [29]. Figure 5.…”

Section: Characterization Of the As-prepared Filmssupporting

confidence: 89%

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

et al. 2015

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WO3 vertical plate-like arrays provide a direct pathway for charge transport, and thus hold great potential as working electrodes for photoelectrochemical (PEC) water splitting. However, surface recombination due to surface defects hinders the performance improvement. In this work, WO3 vertical plate-like arrays films with HfO2 passivation layer were fabricated via a simple dip-coating method. In the images of transmission electron microscope, a fluffy layer and some small sphere particles existed on the surface of WO3 plate. X-ray photoelectron spectroscopy (XPS) showed a higher concentration of Hf element than the result of energy-dispersive X-ray spectroscopy (EDX), which means that HfO2 is rich on the surface of WO3 plates. A higher photocurrent under visible light irradiation was gained with surface passivation. Meanwhile, the results of intensity modulated photocurrent spectrum (IMPS) and incident photon to current conversion efficiency (IPCE) indicate that HfO2 passivation layer, acting as a barrier for the interfacial recombination, is responsible for the improved photoelectrochemical performance of WO3 vertical plate-like arrays film.

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Section: Characterization Of the As-prepared Filmssupporting

confidence: 89%

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

et al. 2015

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“…S7 †). Since WO 3 is known to absorb UV light in wavelength range less than 443 nm due to its band gap ($2.8 eV), 14,49,50 leading to quite high degradation efficiency (62.4%) upon UV degradation at 12 h as presented in Fig. 4a.…”

Section: Resultsmentioning

confidence: 99%

Electrospun tungsten trioxide nanofibers decorated with palladium oxide nanoparticles exhibiting enhanced photocatalytic activity

et al. 2017

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Tungsten trioxide (WO 3 ) based nanofibers have many advantages as photocatalysts due to its band gap which fits with readily accessible light sources. We successfully fabricated novel palladium oxide (PdO) particles decorated WO 3 nanofibers by electrospinning combined with chemical deposition processes, leading to improved photocatalytic efficiency for organic dye degradation up to 86.4%. Morphologies, elemental compositions and structural analyses confirmed the successful uniform decoration of PdO particles along WO 3 nanofibers. Photodegradation of methylene blue as a model pollutant in water media was performed under UV and visible light in the presence of fabricated nanofibers as a photocatalyst. As a result, improved photocatalytic activity by PdO decoration was observed compared to commercially available WO 3 NFs without PdO, attributed to its ability to hold excited electrons and increase surface area of NFs. This fibrous hybrid catalytic materials platform will open up a new and practical route and stimulate further research to improve photocatalytic performance.

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“…19 Due to the multitude of structural distortions from the ideal cubic WO 3 structure related to oxygen octahedral rotations and distortions as well as cation displacements, the band structure of WO 3 is quite complex. 27,29 Intuitively, one would expect Jahn-Teller-type distortions to be more important Fig. 4(b)].…”

Section: All Article Content Except Where Otherwise Noted Is Licensmentioning

confidence: 99%

Symmetry driven control of optical properties in WO₃ films

Herklotz

Rus

et al. 2017

APL Materials

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Rational Band Gap Engineering of WO₃ Photocatalyst for Visible light Water Splitting

Cited by 158 publications

References 22 publications

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

Electrospun tungsten trioxide nanofibers decorated with palladium oxide nanoparticles exhibiting enhanced photocatalytic activity

Symmetry driven control of optical properties in WO₃ films

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Rational Band Gap Engineering of WO3 Photocatalyst for Visible light Water Splitting

Cited by 158 publications

References 22 publications

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

Effect of Surface Passivation on Photoelectrochemical Water Splitting Performance of WO3 Vertical Plate-Like Films

Electrospun tungsten trioxide nanofibers decorated with palladium oxide nanoparticles exhibiting enhanced photocatalytic activity

Symmetry driven control of optical properties in WO3 films

Contact Info

Product

Resources

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Rational Band Gap Engineering of WO₃ Photocatalyst for Visible light Water Splitting

Symmetry driven control of optical properties in WO₃ films