Abstract
TiO2 hollow spheres modified with spatially separated Ag species and RuO2 cocatalysts have been prepared via an alkoxide hydrolysis–precipitation method and a facile impregnation method. High-resolution transmission electron microscopy studies indicate that Ag species and RuO2 co-located on the inner and outer surface of TiO2 hollow spheres, respectively. The resultant catalysts show significantly enhanced activity in photocatalytic hydrogen production under simulated sunlight attributed to spatially separated Ag species and RuO2 cocatalysts on TiO2 hollow spheres, which results in the efficient separation and transportation of photogenerated charge carriers.
Highlights
Semiconductor photocatalysis as a green technology has attracted much interest for the application in solving environmental pollution and energy shortage [1,2,3,4,5]
The photocatalytic properties of TiO2 hollow spheres can be modified by loading cocatalysts [15,16,17], which can serve as reaction sites and provide the trapping sites for the photogenerated carriers of the surface
Loading the reduction and oxidation catalysts photoproduction electron migration [7,22,23,24,25]. The cocatalysts such as RuO2, IrO2, CoOx, and MnOx on the inner and outer surfaces of TiO2 hollow spheres can be expected to achieve enhanced can act as hole collector [26,27,28,29]
Summary
Semiconductor photocatalysis as a green technology has attracted much interest for the application in solving environmental pollution and energy shortage [1,2,3,4,5]. Li et al have reported that reduction cocatalysts (MoS2, NiS, WS2, that SiO2 /Ta3 N5 core/shell structures with spatially separated cocatalysts show superior photocatalytic etc.) and oxidation cocatalysts (IrOx, MnOx, RuOx, etc.) can be selectively deposited on the (010) and activity [19]. Loading the reduction and oxidation catalysts photoproduction electron migration [7,22,23,24,25] The cocatalysts such as RuO2 , IrO2 , CoOx , and MnOx on the inner and outer surfaces of TiO2 hollow spheres can be expected to achieve enhanced can act as hole collector [26,27,28,29].
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