Dimension-Matched Zinc Phthalocyanine/BiVO 4 Ultrathin Nanocomposites for CO 2 Reduction as Efficient Wide-Visible-Light-Driven Photocatalysts via a Cascade Charge Transfer
Dimension-Matched Zinc Phthalocyanine/BiVO 4 Ultrathin Nanocomposites for CO 2 Reduction as Efficient Wide-Visible-Light-Driven Photocatalysts via a Cascade Charge Transfer
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尺寸匹配的锌酞菁/BiVO 4 超薄纳米复合材料通过级联电荷转移作为高效宽可见光驱动光催化剂还原 CO 2
DOI：
10.1002/ange.201905274
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发表时间：
2019
影响因子：
--
通讯作者：
Bian J
中科院分区：
文献类型：
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作者：
Bian J
产品分析和13c同位素测量结果表明，通过氢键连接的酞菁锌/ bivo4纳米片（ZnPc/BVNS）复合材料实现了级联电荷转移，该复合材料随后作为一种高效的宽可见光驱动光催化剂将co2转化为CO和CH4。优化后的ZnPc/BVNS纳米复合材料在520 nm激发和660 nm光子辅助下的量子效率比已有报道的bivo4纳米材料提高了约16倍。实验和理论结果表明，这种特殊的活性是由于尺寸匹配的超薄（约8 nm）异质结纳米结构形成的级联Z方案电荷转移机制快速分离电荷。ZnPc中中心的Zn2+可以接受来自配体的激发电子，从而对co2还原起到催化作用。这种Z‐方案也适用于其他MPc，如FePc和CoPc，以及BVNS。
Cascade charge transfer was realized by a H‐bond linked zinc phthalocyanine/BiVO4nanosheet (ZnPc/BVNS) composite, which subsequently works as an efficient wide‐visible‐light‐driven photocatalyst for converting CO2into CO and CH4, as shown by product analysis and13C isotopic measurement. The optimized ZnPc/BVNS nanocomposite exhibits a ca. 16‐fold enhancement in the quantum efficiency compared with the reported BiVO4nanoparticles 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 Zn2+in ZnPc could accept the excited electrons from the ligand and then provide a catalytic function for CO2reduction. This Z‐scheme is also feasible for other MPc, such as FePc and CoPc, together with BVNS.