TiO2/WO3/Au nanoarchitectures’ photocatalytic activity, “from degradation intermediates to catalysts’ structural peculiarities”, Part I: Aeroxide P25 based composites

Kovács, Gábor; Baia, Lucian; Vulpoi, Adriana; Radu, Teodora; Karácsonyi, É.; Dombi, András; Hernádi, Klára; Danciu, Virginia; Simon, S.; Pap, Zsolt

doi:10.1016/j.apcatb.2013.09.019

Cited by 43 publications

(41 citation statements)

References 42 publications

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“…20,37 To follow this the Ti2p XPS spectra of all the samples were recorded and are presented in Fig. 10.…”

Section: Structural Features Of the Obtained Micro-materialsmentioning

confidence: 99%

“…The possible electron transitions 41 were evaluated by plotting the dR/dλ vs. λ, where R is the reflectance and λ is the wavelength. 20 SEM-EDX analysis was performed on a Hitachi S-4700 Type II cold field emission scanning electron microscope equipped with a Röntec QX2-EDS spectrometer. No conductive coatings were applied on the samples so the fine morphological details could be observed.…”

Section: Materials Characterizationmentioning

confidence: 99%

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“Crystallographic” holes: new insights for a beneficial structural feature for photocatalytic applications

et al. 2015

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One of the most fundamental aspects of the heterogeneous catalysis field is the manipulation of the catalysts' activity. In photocatalysis this is carried out by maximizing the right crystal plane of a semiconductor oxide. Until now, most of the papers have achieved this by a combination of different oxides, with noble metals and sometimes with carbon nanomaterials. In this work MWCNTs (multiwalled carbon nanotubes) were applied as "crystallization promoters" in a very simple, safe, one-step hydrothermal method. By this method TiO 2 nano/micro crystals with exposed {001} facets were obtained in the first step. The next episode in the crystal manipulation "saga" was the modification of the (001) crystallographic plane's structure by creating ordered/own faceted "crystallographic holes". These elements are capable of further enhancing the obtained activity of titania microcrystals to a higher extent, as shown by the UV driven photocatalytic phenol degradation experiments. The appearance of the holes was "provoked" by simple calcination and their presence and influence were demonstrated by XPS and HRTEM.

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“…20,37 To follow this the Ti2p XPS spectra of all the samples were recorded and are presented in Fig. 10.…”

Section: Structural Features Of the Obtained Micro-materialsmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

“Crystallographic” holes: new insights for a beneficial structural feature for photocatalytic applications

et al. 2015

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“…diódákban 2. ábra, Vezető, félvezető, szigetelő anyagok tiltott sáv szélességének ábrázolása illetve ismerünk szilárd-oldat típusúakat: GaAs, InSb, SiC, PbTe; vegyületek közül példa erre a TiO2, Cu2O, PbS, SnO2, SiO2, WO3 [7][8][9].…”

Section: Félvezető Anyagokunclassified

“…ábra, A grafit 6 és szerkezete 7 A grafit is szokatlan tulajdonságokkal rendelkező anyag, nem lehet besorolni a vezetők, vagy a félvezetők kategóriájába, ugyanis átmenetet képez a fémes vezetők és a félvezetők között.…”

Section: A Tio2 Kombinálása Különböző Szénfajtákkalunclassified

“…Ezidáig tehát -az elektronmikroszkópos felvételek kivételével -nincsenek tényleges, kimutatható jelei a kristályosítással kapott lyukaknak, amelyek igazolnák a jelenlétüket. Habár a hidrotermális eljárással előállított TiO2-nál tapasztalt lyukak a kalcinálási folyamat eredményei, létrejöttük egyértelműen a kristályosodási folyamathoz kapcsolódik [7][8].…”

Section: áBra a Minták Röntgendiffraktogramjaunclassified

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TiO2-C kompozitok szerkezetének és fotokatalitikus tulajdonságainak vizsgálata

Vajda

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Photocatalytic membrane filtration and its advantages over conventional approaches in the treatment of oily wastewater: A review

Santos

László

Hodúr

et al. 2020

Asia-Pacific J Chem Eng

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Clean water supply has become one of the biggest challenges of the 21st century; therefore, water source protection is of increasing importance. Beyond environmental protection reasons, economic concerns-derived from increasing costs of processing water and wastewater discharge-also prompt industries to use advanced wastewater treatment methods, which ensure higher purification efficiency or even the recycling of water. Therefore, highly effective treatment of oily wastewaters has become an urgent necessity because they are produced in high quantities and have harmful effects on both the environment and human population. However, high purification efficiency can be difficult to achieve, because some compounds are hard to eliminate. Conventional methods are effective for the removal of floating and dispersed oil, but for finely dispersed, emulsified and dissolved oil advanced methods must be used, such as membrane filtration which exhibits several advantages. The application of this technology is restricted by fouling-the major limiting factor-which jeopardizes the membrane performance. In order to reduce fouling, in-depth research is being conducted to make the treatment of oilcontaminated water technically and economically feasible. The present work aims to review the conventional oil separation methods with their limitations and to focus on membrane filtration, which ensures significantly higher purification efficiencies, including the main problem: the flux reduction caused by fouling. This paper also discusses promising solutions, such as membrane modification methods, mostly with hydrophilic and/or photocatalytic nanoparticles and nanocomposites, overviewing the efforts that are being made to develop feasible technologies to treat oil-contaminated waters.

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TiO2/WO3/Au nanoarchitectures’ photocatalytic activity, “from degradation intermediates to catalysts’ structural peculiarities”, Part I: Aeroxide P25 based composites

Cited by 43 publications

References 42 publications

“Crystallographic” holes: new insights for a beneficial structural feature for photocatalytic applications

“Crystallographic” holes: new insights for a beneficial structural feature for photocatalytic applications

TiO2-C kompozitok szerkezetének és fotokatalitikus tulajdonságainak vizsgálata

Photocatalytic membrane filtration and its advantages over conventional approaches in the treatment of oily wastewater: A review

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