Effect of UV and visible light on photocatalytic reduction of lead and cadmium over titania based binary oxide materials

Surfactant mediated synthesis of spherical binary oxides photocatalytic with enhanced activity in visible light

“…At all calcinations temperature TiZr-10 shows best photocatalytic activity even though the surface area of TiSi samples are higher at all calcination temperatures. The same trend was also marked with 500 • C calcined samples [31]. Higher catalytic activity in visible light also supports the possibility of nonmetal doping during synthesis.…”

“…In particular surfactant mediated synthesis of mesoporous photocatalysts with improved activity are reported [27][28][29][30] in the literature. In our earlier report we have also demonstrated the improved photocatalytic activity of binary oxide prepared in presence of surfactant [31]. In continuation of our reported work here we have tried to investigate the role of surfactant concentration and calcination temperature on the physico-chemical properties and photocatalytic lead removal activity of the prepared materials.…”

“…Materials were synthesized according to the earlier reported method [31] by only varying the surfactant concentration. Pure titania and silica, zirconia mixed titania were prepared by controlled hydrolysis of corresponding isopropoxide in presence of surfactant (cetyltrimethylammonium bromide, CTAB) in n-propanol water mixture.…”

Improving Effect of MnO₂ Addition on TiO₂-Photocatalytic Removal of Lead Ion from Water

“…However, it is difficult to remove the total ions by sole adsorption due to an accompanying desorption process. In order to compensate for the drawback, subsequent photoelectrodeposition of adsorbed Pb (II) ions has been attempted by TiO 2 -photocatalytic oxidation [3,4] or reduction [5][6][7][8][9]. According to thermodynamic constraints, photocatalytic reduction of Pb (II) ions is a minor route and requires a hole scavenger for the reaction to proceed, whereas Pb (II) ions are mainly oxidized to PbO 2 by TiO 2 -photocatalysis under O 2 or O 3 [3,4].…”

Mechanisms of Reactions Induced by Photocatalysis of Titanium Dioxide Nanoparticles

“…•À [320]. The photocatalytic activity of this binary oxide assembly for the degradation of 4-chlorophenol is gradually enhanced with increased ZrO 2 content up to 12 wt%, which has been ascribed to electrons' transfer from the excited ZrO 2 to the conduction band of TiO 2 [321].…”