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The effect of the pH adjustment upon the WO3-WO3 center dot 0.33H(2)O-TiO2 ternary composite systems' photocatalytic activity
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2019
In the present work novel, ternary semiconductor composites were prepared by applying the pH adjustment method (the WO3 based components were obtained separately, while TiO2 was a commercial one), where the pH was fine-tuned to 1, 4, 7 and 10.The composition of the prepared samples was in each case 76% commercial TiO2 (Evonik Aeroxide P25), 12% monoclinic (WO3) and 12% hexagonal partial hydrate (WO3 center dot 0.33H(2)O). All the composites showed improved UV light-driven photocatalytic activity compared to P25 in the degradation of methyl orange, oxalic acid and activity inhibition was observed in the case of phenol degradation. SEM micrographs and the XRD patterns of the samples proved that all three components were successfully integrated into the composite system. DRS spectra of the samples provided evidence concerning a mutual interaction of the composite components modifying their electronic structure, while the effect of the synthesis pH was also visible in the IR spectra. Raman Spectroscopy proved the presence of surface defects, manifested through the presence of (W5+ centers). Moreover, interesting correlations were found between several Raman peak intensity ratios (I-324/I-714; I-943/I-805) and the photoactivity pointing the importance of the W5+ centers and amorphous WO3 formed under basic conditions.
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<div class="JournalArticle Publication short-list"> <div class="authors"> <span class="author-name" mtid="10056913"> <a href="/gui2/?type=authors&mode=browse&sel=10056913" target="_blank">Szekely, Istvan</a> </span> <span class="author-type"> </span> ; <span class="author-name" > Baia, Monica ✉ </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10050524"> <a href="/gui2/?type=authors&mode=browse&sel=10050524" target="_blank">Magyari, Klara</a> </span> <span class="author-type"> </span> ; <span class="author-name" > Boga, Biborka </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10030440"> <a href="/gui2/?type=authors&mode=browse&sel=10030440" target="_blank">Pap, Zsolt ✉</a> </span> <span class="author-type"> </span> </div ><div class="title"><a href="/gui2/?mode=browse¶ms=publication;30965459" mtid="30965459" target="_blank">The effect of the pH adjustment upon the WO3-WO3 center dot 0.33H(2)O-TiO2 ternary composite systems' photocatalytic activity</a></div> <div class="pub-info"> <span class="journal-title">APPLIED SURFACE SCIENCE</span> <span class="journal-volume">490</span> <span class="page"> pp. 469-480. , 12 p. </span> <span class="year">(2019)</span> </div> <div class="pub-end"><div class="identifier-list"> <span class="identifiers"> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="10.1016/j.apsusc.2019.06.036" target="_blank" href="https://doi.org/10.1016/j.apsusc.2019.06.036"> DOI </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="000472709100050" target="_blank" href="https://www.webofscience.com/wos/woscc/full-record/000472709100050"> WoS </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="85067829976" target="_blank" href="http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85067829976"> Scopus </a> </span> </span> </div> <div class="short-pub-prop-list"> <span class="short-pub-mtid"> Közlemény:30965459 </span> <span class="status-holder"><span class="status-data status-APPROVED"> Nyilvános </span></span> <span class="pub-core">Forrás Idéző </span> <span class="pub-type">Folyóiratcikk (Konferenciaközlemény ) </span> <!-- && !record.category.scientific --> <span class="pub-category">Tudományos</span> <div class="publication-citation" style="margin-left: 0.5cm;"> <span title="Nyilvános idézőközlemények összesen, említések nélkül" class="citingPub-count">Nyilvános idéző összesen: 10</span> | Független: 7 | Függő: 3 | Nem jelölt: 0 | WoS jelölt: 10 | Scopus jelölt: 6 | WoS/Scopus jelölt: 10 | DOI jelölt: 10 (Nem nyilvános: 1) </div> </div> </div> </div><div class="JournalArticle Publication long-list">
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<div class="title"><a href="/gui2/?mode=browse¶ms=publication;30965459" target="_blank">The effect of the pH adjustment upon the WO3-WO3 center dot 0.33H(2)O-TiO2 ternary composite systems' photocatalytic activity</a></div> <div> <span class="journal-title">APPLIED SURFACE SCIENCE</span>
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<span title="Nyilvános idézőközlemények összesen, említések nélkül" class="citingPub-count">Nyilvános idéző összesen: 10</span>
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| Függő: 3
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<div class="mtid"><span class="long-pub-mtid">Közlemény: 30965459</span>
| <span class="status-data status-APPROVED"> Nyilvános
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Forrás Idéző
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<div class="lastModified">Utolsó módosítás: 2020.09.23. 08:02 Pécsi Éva (MTMT Közp 3, admin)
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