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Titanium dioxide is the basis of many photocatalytic systems and its photocatalytic activity has been widely used in various fields ranging from the environment and renewable energy sectors [1]However,a key draw back for a wider use of TiO2 is its large band gap (3.2 eV for anatase-type and 3.0 eV for rutile-type) that makes it active only in UV spectral range,which means direct utilization of solar radiation driven photocatalysis is comparatively inefficient in view of considerable parts of solar spectrum covering only the visible light region.