Visible light photochemical activity of heterostructured PbTiO3–TiO2 core–shell particles

State‐of‐the‐Art Progress in Diverse Heterostructured Photocatalysts toward Promoting Photocatalytic Performance

“…[49][50][51] The shell is initially formed in gas or solution phase. [53][54][55] ZnO/CdS core/shell nanorod arrays were prepared directly on FTO (fl uorine doped tin oxide) substrates via a two-step electrochemical deposition process. The ion exchange reaction is superior in terms of the selective formation of a dimer structure with an epitaxial heterointerface without changing the prototypical shape of the ionic semiconductor.…”

Single-crystal heterostructured PbTiO3/CdS nanorods with enhanced visible-light-driven photocatalytic performance

“…5. 9,23 For the heterostructured PbTiO 3 /CdS nanorods, an enhanced light absorption was achieved with the increasing amount of CdS nanoparticles on the surface of PbTiO 3 nanorods. 23 In contrast, the heterostructured PbTiO 3 /CdS nanorods demonstrate two absorption edges around 420 and 520 nm, corresponding to the band edges of PbTiO 3 and CdS respectively.…”

“…14 One way to prevent the self-oxidation of CdS is to couple the CdS nanoparticles with another semiconductor which have a lower but closely-lying conduction band (CB) and an appropriate valence band (VB), by forming heterostructured composite photocatalysts. [21][22][23][24] Recently, we designed and synthesized single-crystal TiO 2 / PbTiO 3 composite by a hydrothermal route, which demonstrated high visible-light catalytic performance as a result of the largescale of sharp interfaces between TiO 2 and PbTiO 3 . As the previous work discussed, the enhanced photocatalytic properties were ascribed to an effective separation of photogenerated electrons and holes via the heterostructured interfaces between CdS and other semiconductors, 19 where high quality interface with matched band alignment is desired to promoting charge carrier separation.…”

Investigating the synergistic effects in tourmaline/TiO2-based heterogeneous photocatalysis: Underlying mechanism insights

“…The separated electrons and holes can be then involved in the generation of reactive species (Fig. 6d) Furthermore, it has been implied that micronscale ferroelectric core will preferably provide full extended polarization and band bending [15], and polarization orientations can be differed in each domain of ferroelectric, that is, different spatial degree of band bending will occur at distinct surface regions. Similar to this, the incorporation of micron-sized tourmaline will consequently ensure high efficiencies for electron-hole separation, spatially selective redox reaction and, therefore, limited back-reaction at different surface locations.…”

“…Recently, some reports focused on the polarizable semiconductors (e.g., ferroelectrics, such as LiNbO 3 [12], BiFeO 3 [13]) to improve photocatalytic activity. Moreover, the influence of ferroelectric polarization on photogenerated charge carriers and photochemical reactions can also extend to the supported non-ferroelectric coating [14][15][16][17]. This concept provides an innovative alternative for photocatalyst design with better performance.…”