グリコサーマル合成したTiO&lt;sub&gt;2&lt;/sub&gt;–SiO&lt;sub&gt;2&lt;/sub&gt;複合酸化物上に担持したPt–WO&lt;sub&gt;3&lt;/sub&gt;触媒による&lt;i&gt;n&lt;/i&gt;-ヘキサデカンの異性化

Hosokawa, Saburo; Kamishima, Shota; Kubo, Koichi; Kanai, Hiroyoshi; Wada, Kenji; Inoue, Masashi

doi:10.1627/jpi.54.361

Cited by 2 publications

(1 citation statement)

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“…The peak around 3 ¡ attributable to WM (M: Ti, P, W). 7),16), 17) Compared to W-2 and W-5, W-9 has a higher peak intensity in this region. This result suggests that the number of WOW bonds increases with the increase of the WO x cluster loading amount.…”

Section: W L 3 -Edge Exafs Spectramentioning

confidence: 90%

Local structure investigation of WOx cluster modified on titanium-substituted hydroxyapatite for promoting charge separation under UV illumination

Ishisone

Isobe

Matsushita

et al. 2020

J. Ceram. Soc. Japan

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The local structure of WO x clusters modified on Ti-doped hydroxyapatite (Ti-HAp) photocatalyst surface was analyzed using X-ray absorption fine structure (XAFS) measurements. W L 1-and L 3-edge X-ray absorption near-edge structure (XANES) spectra analyses revealed that WO x clusters include WO 4 and WO 6 structures and that WO 6 amounts increase concomitantly with increasing WO x cluster amounts. Results of analyses of W L 3edge extended X-ray absorption fine structure (EXAFS) spectra confirmed this finding, demonstrating that the average coordination number of W surrounded by O increases from 4 to 5 with increasing WO x cluster amount. The number of WOW bonds increased concomitantly with increasing amounts of modified WO x clusters, indicating the formation of WO x cluster aggregates. Assuming that two-dimensional WO x monolayer domains were formed and that the domain is square, the average WO x cluster structure was calculated as changing from a monomeric to a trimeric or tetrameric structure with increasing WO x loading amount. The cluster size obtained from the model is consistent with those found in our earlier experimental study. The cluster structure represented here demonstrated that the modified WO x clusters included a low coordination structure. Its electronic structure became different from that of doped W or bulk WO 3 and a suitable electron transition path from Ti 3d to W 5d was created, showing high photocatalytic activity.

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Section: W L 3 -Edge Exafs Spectramentioning

confidence: 90%