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Preparation of samples For the preparation of titania sol, the titanyl sulphate TiOSO 4 · n H 2 O was used. The TiO 2 · n H 2 O suspensions were prepared in the two ways: (i) Titanyl
considered critically to assess what novelty is really brought since the field seems to have been saturated. The basic principles are well known. A semiconductor (in this case TiO 2 ) acts as sensitizer for light-induced redox processes. Absorption of a
techniques such as UV [ 5 ], Fe 0 [ 30 – 32 ], Fe 2+ [ 29 , 30 , 32 , 33 ], Fe 3+ [ 33 ], TiO 2 [ 6 , 7 , 31 , 34 , 35 ], H 2 O 2 [ 8 ], UV/ZnO [ 5 ], UV/TiO 2 [ 6 , 7 ], UV/H 2 O 2 [ 8 ], H 2 O 2 /Fe 2+ [ 36 – 38 ], /Fe 2+ [ 37 ], and /H 2
]. The use of a more coarse dispersed support, namely fumed TiO 2 , results in formation of rigid porous compositions as a result of dry and wet milling (samples 3, 4). In both cases milled samples contain mesopores with two maxima in the same position
Introduction Photocatalytic oxidation using semiconductors as photocatalysts represents an excellent technology for environmental remediation. In particular, photocatalytic oxidation based on TiO 2 has been demonstrated to be
maintaining its high conduction band [ 19 – 21 ]. In recent years, the optical properties in the visible spectral region produced by the doping of Ru ion into TiO 2 photocatalysts have attracted much attention. Ohno et al. [ 22 ] found that the Ru
Content/% Al 2 O 3 SiO 2 CaO MgO Fe 2 O 3 Na 2 O K 2 O TiO 2 L
individual molybdenum trioxide is subjected to dry milling. Fig. 1 XRD of V 2 O 5 : initial ( a ), deposited on Al 2 O 3 ( b ), TiO 2 ( c ), A-50 ( d
Introduction Photocatalysis of the degradation of organic pollutants in water or air streams by using light absorbing semiconductors such as TiO 2 has been widely investigated [ 1 – 3 ] due to not only its scientific interest
Green chemistry approach for the synthesis of PbSnO3
An effective photocatalyst for the degradation of dyes under sunlight
of TiO 2 photocatalyst [ 11 – 15 ]. Alton and Ferry [ 16 ] used SiW 2 O 4 as photocatalyst for the photocatalytic degradation of acid orange dye. There is an urgent need to search for an effective heterogeneous oxide photocatalyst for
