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Tytuł:
Removal of organic dye in the hybrid photocatalysis/membrane processes system
Autorzy:
Grzechulska-Damszel, J.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779880.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dwutlenek tytanu
fotokataliza
procesy membranowe
barwniki organiczne
układy hybrydowe
titanium dioxide
photocatalysis
membrane processes
organic dyes
hybrid systems
Opis:
The removal of azo dye Acid Red 18 in hybrid photocatalysis/membrane processes systems was investigated. The photocatalytic reactions were conducted in the reactor with photocatalyst suspended in the solution. The reaction solution was recirculated through the ultrafiltration system. A commercially available titanium dioxide (AeroxideŽ P25, Degussa, Germany) was used as a photocatalyst. The solution after the photocatalytic/UF reaction was applied as the feed for the membrane distillation process. The changes of various parameters, including the concentration of the dye, pH and the conductivity of the solution, TOC and TDS content were analyzed during the process. It was found that azo dye Acid Red 18 could be successfully decolourised in the hybrid photocatalysis/UF system. The catalyst particles were retained in the feed solution by means of the ultrafiltration membrane so the obtained permeate was free of TiO2. The application of ultrafiltration together with the photocatalytic process results in the separation of photocatalyst from the treated solution but does not give the complete removal of organic matter from the reaction mixture. Membrane distillation applied with the permeate after the photocatalysis/UF process as a feed gives a complete separation of TOC from the treated solution and the obtained product is practically pure water.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 2; 94-98
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water purification using a novel reactor with the photoactive refill
Autorzy:
Grzechulska-Damszel, J.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779398.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dwutlenek tytanu
fotokataliza
reaktor przepływowy
barwniki organiczne
titanium dioxide
photocatalysis
flow reactor
photoactive coating
organic dyes
Opis:
The aim of the presented work was the removal of organic dye, Acid Red 18, from water using a novel reactor with the photoactive refill. Titanium dioxide was immobilized on the base material as a thin layer from the alcoholic suspension followed by thermal stabilization. The prepared coating exhibits high stability in repeated cycles of water treatment. The complete removal of colour was achieved in a relatively short time of 14 hours. The proposed reactor with the photoactive refill solves the problem of the necessity of the replacement of the reactor or parts of the reactor when the photocatalysts activity decreases. In the case of activity drop of the photocatalyst, only the photoactivve refill can be easily replaced.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 1; 61-63
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermally Stimulated Electron Emission from K-Bi-GICs
Autorzy:
Chrzanowski, J.
Klimkiewicz, R.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/1968867.pdf
Data publikacji:
1998-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Tx
79.75.+g
79.20.Kz
Opis:
The results of the investigations of thermally stimulated electron emission from graphite submitted to intercalation of K-Bi alloy, in the temperature range of 100-400 K, are presented. Total and partial pressure in the measuring chamber in relation to the temperature of the sample are also reported. The insertion of a K-Bi alloy into the interlayers of graphite considerably changes thermally stimulated electron emission properties. The emission images I(T) depend on the content of intercalate and the emission maxima obtained at temperatures of about 170 and 210 K are conditioned by the desorption of a gas while the total pressure above the different samples is of the same order. The desorption of gases at a temperature over 250 K does not cause any increase in the electron emission.
Źródło:
Acta Physica Polonica A; 1998, 93, 3; 531-537
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ aktywności wody i temperatury na wzrost oraz aktywność lipolityczną szczepów Penicillium chrysogenum w pożywkach płynnych z olejami roślinnymi
Effect of water activity and temperature on growth and lipolytic activity of Penicillium chrysogenum strains in liquid culture media with plant oils
Autorzy:
Janda, K.
Markowska-Szczupak, A.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/827327.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
Penicillium chrysogenum
hodowla mikroorganizmow
pozywki plynne
aktywnosc wody
temperatura
aktywnosc lipolityczna
oleje roslinne
Opis:
Szczepy P. chrysogenum wyizolowane z nasion rzepaku, soi i słonecznika hodowano w pożywkach płynnych z dodatkiem oleju rzepakowego, sojowego i słonecznikowego. Zbadano wpływ aktywności wody (aw) pożywki (0,995, 0,950, 0,900 i 0,850) i temperatury (15 i 25 ºC) na zawartość suchej masy grzybni i aktywność lipolityczną. Wzrost grzybni badanych szczepów był zróżnicowany w zależności od aw i temperatury. Aktywność lipolityczna w temperaturze 15 ºC była wyższa niż w 25 ºC. Najwyższą aktywność P. chrysogenum stwierdzono w temperaturze 15 ºC przy najniższej badanej aktywności wody pożywki. Otrzymane wyniki wskazują na możliwość inicjowania niekorzystnych zmian jakościowych olejów przez enzymy lipolityczne szczepów tego gatunku nawet wówczas, gdy nie ma widocznego (makroskopowo) wzrostu grzybni.
Penicillium chrysogenum strains, isolated from rapeseeds, soybean, and sunflower seeds, were incubated in a liquid medium with rapeseed oil, soybean oil, and sunflower oil added. The effects of water activity (aw) of the medium (0.995; 0.950; 0.900; 0.850) and temperature (15 and 25 ºC) were studied on the dry mass content of mycelium and on the lipolytic activity. The growth of the mycelium of the strains analyzed varied depending on aw and temperature. The lipolytic activity at a temperature of 15 ºC was higher than that at a temperature of 25 ºC. The highest lipolytic activity of P. chrysogenum strains was reported at a temperature of 15 ºC at the lowest tested water activity of the culture medium (aw = 0.850). The results obtained prove that the lipolytic enzymes produced by the strains of that fungus can initiate disadvantageous quality changes in oils, and this is possible even where there is no visible growth of the mycelium.
Źródło:
Żywność Nauka Technologia Jakość; 2014, 21, 4
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of selenium diet supplement
Autorzy:
Grzechulska-Damszel, J.
Markowska-Szczupak, A.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/777921.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
selenium supplementation
chemical analysis
microbial analysis
stability
Opis:
Selenium is one of the trace elements playing a crucial role in a proper function of living organisms. Selenium intake varies, largely based on the selenium content of food. The daily Se intake recommended for adults amounts to 55 μg per day. The mean level of selenium in the population varies considerably between countries. Recent studies on the selenium dietary intakes in Poland showed that it is not sufficient to meet the daily requirement for this microelement so it is strongly recommended to employ selenium supplementation. The commercial product SEL-BRCA1®  being a selenium diet supplement was subjected to chemical and microbial analysis to determine its stability in storage time and conditions. Basing on the obtained results it can be stated that the stability of studied supplement, stored in the closed bottles, can be confirmed for the period of time up to 45 months after the production date and it is not recommended to store opened bottles for the period of time longer than 12 months. The studied supplement showed a very high microbial stability what underscores its usefulness as human medicines.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 4; 84-87
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New photocatalyst for decomposition of humic acids in photocatalysis and photo-Fenton processes
Autorzy:
Tryba, B.
Brożek, P.
Piszcz, M.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/779749.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
kwas huminowy
rozkład fotochemiczny
TiO2
FeC2O4
humic acid (HA)
photodecomposition
photo-Fenton process
Opis:
Humic acid Leonardite IHSS standard was decomposed on TiO2 and TiO2 modifi ed by FeC2O4 via the photocatalysis and photo-Fenton processes under UV irradiation. Humic acid (HA) were favorable adsorbed on TiO2 surface and followed decomposition during UV irradiation faster on TiO2 than on the modifi ed samples. However, when H2O2 was added to the solution, the photo-Fenton process occurred on the prepared TiO2 samples, contained iron together with photocatalysis and high acceleration of HA decomposition was observed. In this case the mineralization degree was much higher than in the applied photocatalysis only, around 75% HA (with concentration of 18 mg/L) was mineralized after 3 h of adsorption and 5 h of UV irradiation in the presence of H2O2 and modifi ed TiO2 whereas on TiO2 mineralisation of HA occurred in around 45% only. The measured fl uorescence spectra of HA solutions showed that in the presence of H2O2 polycyclic aromatics were rapidly oxidized to the lower size products such as alcohols, aldehydes, ketones and carboxylic acids, what accelerated the process of HA decomposition.
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 4; 8-14
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of the TiO2 photocatalyst using pressurized ammonia
Autorzy:
Wawrzyniak, B.
Janus, M.
Grzmil, B.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/778501.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fotokataliza
TiO2
TiO2-azot
odbarwianie barwników
photocatalysis
TiO2-nitrogen
dye decolorization
preparation under pressure
Opis:
The industrial hydrated amorphous titanium dioxide (TiO2 ź xH2O) was modified by treatment inside a chemical reactor under elevated pressure at low temperatures for 4 hours in an ammonia atmosphere. On the basis of the FTIR/DRS analysis the presence of nitrogen was confirmed. The XRD patterns of all of the catalysts exhibit mainly the diffraction lines of anatase phases. The photocatalytic activity of the modified photocatalysts was determined and compared to TiO2-P25 (Degussa, Germany). The high rate of phenol and dye degradation was obtained for the catalysts modified at 180°/5atm. TiO2-P25 showed similar activity in phenol decomposition like TiO2-15bar, whereas it was more active in dye decomposition.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 1; 51-56
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of humic acid on mesoporous carbons prepared from poly- (ethylene terephthalate) templated with magnesium compounds
Autorzy:
Karolczyk, J.
Mozia, S.
Morawski, A.W.
Przepiórski, J.
Powiązania:
https://bibliotekanauki.pl/articles/778949.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
porous carbon
adsorption
humic acid
fluorescence spectroscopy
Opis:
Porous carbons obtained from poly(ethylene terephtalate) contained in a mixture with either MgCO3 or Mg(OH)2 were examined as adsorbents for removal of humic acid from water. Adsorption of the model contaminants is discussed in relation to the textural parameters of the obtained carbon materials. Pore structure parameters of the carbonaceous materials were strongly influenced by preparation conditions including temperature and relative amounts of the inorganics used during preparations as template. Porous carbons prepared revealed a potential to purify water from the model contaminant of high molecular weight. The results presented confirmed a key role of mesoporosity in the adsorption of humic acid. Fluorescence spectroscopy was confirmed to be an useful method to evaluate concentration of humic acid in water.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 95-99
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Performance of Hybrid Photolysis-DCMD and Photocatalysis-DCMD Systems Utilizing UV-C Radiation for Removal of Diclofenac Sodium Salt From Water
Autorzy:
Mozia, S.
Darowna, D.
Przepiórski, J.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779272.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
photocatalytic membrane reactor,
direct contact membrane distillation
photolysis
photocatalysis
diclofenac sodium salt
Opis:
The removal of a non-steroidal anti-inflammatory drug (NSAID) diclofenac sodium salt (DCF, C14H10Cl2NNaO2) from water in two hybrid systems coupling photolysis or photocatalysis with direct contact membrane distillation (DCMD) is presented. A UV-C germicidal lamp was used as a source of irradiation. The initial concentration of DCF was in the range of 0.005-0.15 mmol/dm3 and the TiO2 AeroxideŽ P25 loading (hybrid photocatalysis-DCMD) ranged from 0.05 to 0.4 g/dm3. Regardless of the applied hybrid system and the initial concentration of DCF, the model drug was completely decomposed within 4h of irradiation or less. Mineralization was less efficient than photodecomposition. In case of the hybrid photolysis-DCMD process the efficiency of TOC degradation after 5h of irradiation ranged from 27.3-48.7% depending on the DCF initial concentration. The addition of TiO2 allowed to improve the efficiency of TOC removal. The highest degradation rate was obtained at 0.3 gTiO2/dm3. During the process conducted with the lowest DCF initial concentrations (0.005-0.025 mmol/dm3) a complete mineralization was obtained. However, when higher initial amounts of DCF were used (0.05-0.15 mmol/dm3), the efficiency of TOC degradation was in the range of 82.5-85%. The quality of distillate was high regardless of the system: DCF was not detected, TOC concentration did not exceeded 0.7 mg/dm3 (1.9 mg/dm3 in permeate) and conductivity was lower than 1.6 žS/cm.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 51-60
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dye decomposition on P25 with enhanced adsorptivity
Autorzy:
Janus, M.
Wawrzyniak, B.
Tryba, B.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/779704.pdf
Data publikacji:
2008
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fotokatalizator
N-domieszkowanie
dwutlenek tytanu
barwnik azowy
visible-light active photocatalyst
N-doped
titanium dioxide
azo dye
Opis:
The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 AeroxideŽ P-25 Degussa, Germany) are presented. For the TiO2-P25/N preparation TiO2-P25 and gaseous ammonia were kept in a pressure reactor (10 bars) for 4 hours at the temperature of 200°C. This modification process changed the chemical structure of the TiO2 surface. The formation of NH4+ groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm-1 attributed to bending vibrations of NH4+ could be observed on the FTIR spectra of the catalysts modified with ammonia and the band attributed to the hydroxyl groups at 3300 - 3500 cm-1, which were not reduced after N-doping. The photocatalytic activity of the photocatalysts was checked through the decomposition of two dyes under visible light irradiation. The modified TiO2 thus prepared samples were more active than TiO2-P25 for the decomposition of dyes under visible light irradiation.
Źródło:
Polish Journal of Chemical Technology; 2008, 10, 2; 11-16
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A preliminary study on antifungal effect of TiO2-based paints in natural indoor light
Autorzy:
Markowska-Szczupak, A.
Ulfig, K.
Grzmil, B.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/778079.pdf
Data publikacji:
2010
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
działanie przeciwgrzybicze
dwutlenek tytanu
naturalne światło w pomieszczeniach
fotokatalizy
antifungal activity
titanium dioxide
natural indoor light
photocatalysis
Opis:
The antifungal activity of four commercial photocatalytic paints (KEIM Ecosil ME, Titanium FA, Photo Silicate and Silicate D) in natural indoor light was investigated. The paints contained TiO2 in rutile and anatase crystalline forms as evidenced by means of the X-ray diffraction analysis. In most cases the paints inhibited growth of fungi viz. Trichoderma viride, Aspergillus niger, Coonemeria crustacea, Eurotium herbariorum, and Dactylomyces sp . The KEIM Ecosil ME paint displayed the highest antifungal effect in the light, which could be explained with the highest anatase content. The paint antifungal activity and the fungal sensitivity to the TiO2- mediated photocatalytic reaction both decreased in the following orders: KEIM Ecosil ME > Titanium FA > Photo Silicate > Silicate D and T. viride > Dactylomyces sp. > A. niger > E. herbariorum.
Źródło:
Polish Journal of Chemical Technology; 2010, 12, 4; 53-57
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TiO2 modified by ammonia as a long lifetime photocatalyst for dyes decomposition
Autorzy:
Choina, J.
Dolat, D.
Kusiak, E.
Janus, M.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/778832.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fotokataliza
TiO2 modyfikowany azotem
żywotność
photocatalysis
nitrogen-modified TiO2
lifetime
Opis:
Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198) decomposition. The effect of aeration and the different value of the pH of the reaction medium on the photocatalytic degradation of Reactive Red 198 in water has been investigated. It has been reported that the degradation is greatly influenced by the reaction pH and the faster decomposition of azo dye took place at pH 3.5. When the solution was acidic, a larger amount of azo dye on the positively charged surface of TiO2 photocatalysts was adsorbed. From the obtained results it can be seen that the effectiveness of the decolourisation of the solution was faster by using the nitrogen-modified TiO2.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 4; 1-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of titanium dioxide modification on the antibacterial properties
Autorzy:
Rokicka, P.
Markowska-Szczupak, A.
Kowalczyk, Ł.
Kowalska, E.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/778569.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
antibacterial properties
Escherichia coli K12
modified photocatalysts
titanium dioxide
visible-responsive photocatalysts
Opis:
Antibacterial properties of 15 titania photocatalysts, mono- and dual-modified with nitrogen and carbon were examined. Amorphous TiO2 , supplied by Azoty Group Chemical Factory Police S.A., was used as titania source (Ar-TiO2 , C-TiO2 , N-TiO2 ;2 and N,C-Ti2 2 calcined at 300°C, 400°C, 500°C, 600°C, 700°C). The disinfection ability was examined against Escherichia coli K12 under irradiation with UV and artificial sunlight and in dark conditions. It has been found the development of new photocatalysts with enhanced interaction ability with microorganisms might be a useful strategy to improve disinfection method conducted under artificial sunlight irradiation. The efficiency of disinfection process conducted under artificial sunlight irradiation with carbon (C-TiO2 ) and carbon/nitrogen (N,C-TiO2 ) photocatalysts was similar as obtained under UV irradiation. Furthermore, during dark incubation, any toxicity of the photocatalyst was noted.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 4; 56-64
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photocatalytic mineralisation of humic acids using TiO2 modified by tungsten dioxide/ hydrogen peroxide
Autorzy:
Tryba, B.
Piszcz, M.
Borowiak-Paleń, E.
Grzmil, B.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/779747.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
kwasy humusowe
WO3/TiO2
powstawanie rodników
humic acids photodecomposition
OH radicals formation
Opis:
TiO2 of anatase structure was modified by tungsten dioxide and H2O2 in order to obtain WO3-TiO2 photocatalyst with enhanced photocatalytic activity under both, UV and artificial solar light irradiations. WO2 was dissolved in 30% H2O2 and mixed with TiO2 in a vacuum evaporator at 70°C. Such modified TiO2 was dried and then calcinated at 400 and 600°C.The prepared samples and unmodified TiO2 were used for the photocatalytic decomposition of humic acids (Leonardite standard IHSS) in the aqueous solution under irradiations of both, UV and artificial solar light. Modification of TiO2 with tungsten dioxide and H2O2 improved separation of free carriers in TiO2 which resulted in the increase of OH radicals formation. Calcination caused an increase of anatase crystals and higher yield in OH radicals. The uncalcined samples showed high abilities for the adsorption of HA. Combination of adsorption abilities and photocatalytic activity of photocatalyst caused that the uncalcined TiO2 modified with WO2/H2O2 showed the shortest time of HA mineralisation. The mineralisation of HA under the artificial solar light was much lower than under the UV. It was proved that, although OH radicals are powerful in the decomposition of HA, adsorption can facilitate the contact of the adsorbed molecules with the photocatalyst surface and accelerate their photocatalytic decomposition.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 2; 54-61
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon modified TiO2 photocatalysts for water purification
Autorzy:
Morawski, A.W.
Janus, M.
Tryba, B.
Toyoda, M.
Tsumura, T.
Inagaki, M.
Powiązania:
https://bibliotekanauki.pl/articles/779326.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
TiO2/AC
TiO2 dopowany węglem
TiO2 pokryty węglem
fotokataliza
carbon-doped TiO2
carbon-coated TiO2
photocatalysis
Opis:
Carbon can form different structures with TiO2: carbon-doped TiO2, carbon coated TiO2 and composites of TiO2 and carbon. The presence of carbon layer on the surface of TiO2 as well as the presence of porous carbon in the composites with TiO2 can increase the concentration of organic pollutants on the surface of TiO2, facilitating the contact of the reactive species with the organic molecules. Carbon-doped TiO2 can extend the absorption of the light to the visible region by the narrowing of the band gap and makes the photocatalysts active under visible light irradiation. TiO2 loaded carbon can also work as a photocatalyst, on which the molecules are adsorbed in the pores of carbon and then they undergo the photocatalytic decomposition with UV irradiation. Enhanced photocatalytic activity for the destruction of some organic compounds in water was noticed on the carbon coated TiO2 and TiO2 loaded activated carbon, mostly because of the adsorptive role of carbon. However, in carbon-doped TiO2, the role of carbon is somewhat different, the replacement of carbon atom with Ti or oxygen and formation of oxygen vacancies are responsible for extending its photocatalytic activity towards the visible range.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 2; 46-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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