Photocatalytic degradation of methylene blue using a zinc oxide-cerium oxide catalyst

Venkatesham, V.; Motappa, Madhu Gattumane; Venkata, Satyanarayana Suggala; Sadashivaiah, Preetham Halugondanahalli

doi:10.5155/eurjchem.3.2.191-195.564

Cited by 21 publications

(12 citation statements)

References 23 publications

(14 reference statements)

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“…where is the concentration of lignin and HO • the hydroxyl radical concentration. By the pseudostationary hypothesis (i.e., the HO • can be considered to be constant because of the continuous hydroxyl ion generation by photocatalysis) the rate depends only on the lignin concentration [25]. The rate expression can be written as follows:…”

Section: Photocatalytic Experimentsmentioning

confidence: 99%

Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

Lekelefac

Hild

Czermak

et al. 2014

International Journal of Photoenergy

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The synthesis of immobilized catalyst on porous glass support material via the sol-gel route is reported. TiO2-P25-SiO2+ Pt, TiO2-P25-SiO2, TiOSO4_30.6 wt%, and ZnO + TiO2-P25-SiO2catalysts were synthesized and a comparative study is done regarding morphology of coatings, degradation rates, reaction rates, dissolved carbon (DC), formation of peaks, and fluorescence of products formed from the photocatalytic degradation of lignin sulfonate obtained from a local paper plant. Through simultaneous reaction-extraction pathways applying dialysis filtration and highly porous polystyrene divinylbenzene adsorbent resin (HR-P) for solid phase extraction (SPE), an attempt has been made to isolate smaller molecules produced from photocatalytic degradation. Moreover relatively high lignin sulfonate (0.5 g/L) concentrations are used in the reactions. UV-Vis spectroscopy revealed a faster reduction in the concentration values for the aliphatic moiety compared to the aromatic moiety. Peaks were observed by both fluorescence spectroscopy and HPLC suggesting the production of new substances and fluorophores.

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Section: Photocatalytic Experimentsmentioning

confidence: 99%

Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

Lekelefac

Hild

Czermak

et al. 2014

International Journal of Photoenergy

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“…Применение фотокаталитических материалов является эффективным методом ускорения фоторазложения органических загрязнений [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. В последние десятилетия различные фотокаталитические материалы и покрытия являлись предметом интенсивных исследований [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionunclassified

“…Химический состав фотокаталитических материалов на основе оксида цинка оказывает сильное влияние на их фотокаталитическую активность. Было установлено, что смешанные оксидные материалы ZnO−CeO 2 [17][18][19], ZnO−TiO 2 [3,20], ZnO−Y 2 O 3 [21], ZnO−SnO 2 [22][23][24][25][26][27][28][29][30][31][32][33][34] характеризуются более высокими фотокаталитическими и бактерицидными свойствами по сравнению с ZnO.…”

Section: Introductionunclassified

Прозрачные фотокаталитические ZnO-SnO-=SUB=-2-=/SUB=- нанопокрытия, полученные полимерно-солевым методом

Евстропьев¹,

Lesnykh²,

Никоноров³

et al. 2019

Журнал Технической Физики

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The structure and properties of transparent ZnO–SnO_2 photocatalytic coatings formed on glass surfaces by the polymer–salt method are studied. The physical and chemical processes occurring during formation of the coatings are studied by differential scanning calorimetry and X-ray diffraction analysis. The structure and optical properties of the obtained thin oxide films are studied by optical spectroscopy, photoluminescence, and scanning electron microscopy. It is shown that the polymer–salt method allows formation of homogeneous and transparent ZnO–SnO_2 coatings consisting of oxide nanoparticles completely covering the glass substrate surface. It is found that the formed transparent ZnO–SnO_2 coatings have high photocatalytic properties and can generate singlet oxygen under action of UV radiation.

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“…Cerium is relatively earth-abundant and the oxides, including Ce 2 O 3 and Ce 7 O 12 , are known to have band gaps in the visible region [13,19–21]. Our team has maintained a keen interest in alternative affordable, earth-abundant, visible light absorbing metal oxides to be used in two-photon ‘Z-schemes’ for dye-sensitized photoelectrosynthesis cells (DSPECs) [22–24].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous cerium oxide nanospheres for the visible-light driven photocatalytic degradation of dyes

Muduli¹,

Wang²,

Shi³

et al. 2014

Beilstein J. Nanotechnol.

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SummaryA facile, solvothermal synthesis of mesoporous cerium oxide nanospheres is reported for the purpose of the photocatalytic degradation of organic dyes and future applications in sustainable energy research. The earth-abundant, relatively affordable, mixed valence cerium oxide sample, which consists of predominantly Ce7O12, has been characterized by powder X-ray diffraction, X-ray photoelectron and UV–vis spectroscopy, and transmission electron microscopy. Together with N2 sorption experiments, the data confirms that the new cerium oxide material is mesoporous and absorbs visible light. The photocatalytic degradation of rhodamin B is investigated with a series of radical scavengers, suggesting that the mechanism of photocatalytic activity under visible-light irradiation involves predominantly hydroxyl radicals as the active species.

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Photocatalytic degradation of methylene blue using a zinc oxide-cerium oxide catalyst

Cited by 21 publications

References 23 publications

Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

Прозрачные фотокаталитические ZnO-SnO-=SUB=-2-=/SUB=- нанопокрытия, полученные полимерно-солевым методом

Mesoporous cerium oxide nanospheres for the visible-light driven photocatalytic degradation of dyes

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