Enhanced photocatalytic oxidation of arsenite to arsenate in water solutions by a new catalyst based on MoOx supported on TiO2

Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

“…The scan speed was 240 nm min −1 , PMT voltage was 700 V, and the width of excitation and emission slit were set to be both 5 nm. Many research results indicated that certain molybdenum oxide exist in photocatalyst systems would enhance the photocatalytic activities of the photocatalyst system due to their excellent performance in the separation of electrons and holes pairs [30,31]. The zeolite characteristic peaks in TiO 2 /MoS 2 @zeolite and TiO 2 @zeolite composites are appeared at 11.9 • , 23.6 • , 27.0 • and 31.4 • (PDF#38-0239) corresponding to the diffraction peaks of Faujasite-Na and the broad peak between 20-35 • is disappeared compared to pure zeolite (see Fig.…”

Nanostructured N-doped TiO2 coated on glass spheres for the photocatalytic removal of organic dyes under UV or visible light irradiation

“…The main research objectives are to increase the photocatalytic performances of TiO 2 through the doping of its crystalline structure with non-metal ions that reduces the http://dx.doi.org/10.1016/j.apcatb.2015.01.039 0926-3373/© 2015 Elsevier B.V. All rights reserved. band-gap and makes possible the fruitful absorption of the visible light [14,[22][23][24][25][26][27][28][29][30][31]. It was shown that the doping of TiO 2 with nitrogen has led to an enhanced photocatalytic activity in presence of visible light irradiation [24,28].…”

“…Titanium dioxide (TiO 2 ) is the photocatalyst widely used in water purification technology [11][12][13][14][15]. However, the main deficiency for the practical applications of TiO 2 is limited by its large band-gap (3.2 eV), meaning that it can be only active under the UV light irradiation [16][17][18][19][20][21].…”

Photocatalytic properties of TiO2-functionalized tiles: influence of ceramic substrate

“…Semiconductor materials, particularly TiO 2 , have been found to be able to oxidize aqueous or gaseous pollutants under UV irradiation [1][2][3][4] and to inactivate microorganisms [5,6]. In the presence of oxygen and UV irradiation, organic substrates can be decomposed to CO 2 , H 2 O, or mineralized acids on the surface of photocatalysts [7,8].…”