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Dimension-Matched Zinc Phthalocyanine/BiVO 4 Ultrathin Nanocomposites for CO 2 Reduction as Efficient Wide-Visible-Light-Driven Photocatalysts via a Cascade Charge Transfer
Ist Teil von
Angewandte Chemie International Edition, 2019-08, Vol.58 (32), p.10873-10878
Ort / Verlag
Germany
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Cascade charge transfer was realized by a H-bond linked zinc phthalocyanine/BiVO
nanosheet (ZnPc/BVNS) composite, which subsequently works as an efficient wide-visible-light-driven photocatalyst for converting CO
into CO and CH
, as shown by product analysis and
C isotopic measurement. The optimized ZnPc/BVNS nanocomposite exhibits a ca. 16-fold enhancement in the quantum efficiency compared with the reported BiVO
nanoparticles at the excitation of 520 nm with an assistance of 660 nm photons. Experimental and theoretical results show the exceptional activities are attributed to the rapid charge separation by a cascade Z-scheme charge transfer mechanism formed by the dimension-matched ultrathin (ca. 8 nm) heterojunction nanostructure. The central Zn
in ZnPc could accept the excited electrons from the ligand and then provide a catalytic function for CO
reduction. This Z-scheme is also feasible for other MPc, such as FePc and CoPc, together with BVNS.