光催化
材料科学
聚吡咯
化学工程
纳米技术
复合数
载流子
带隙
量子效率
纳米管
可见光谱
催化作用
光化学
聚合
复合材料
碳纳米管
光电子学
化学
有机化学
聚合物
工程类
作者
Xinxin Peng,Junwei Li,Luocai Yi,Xi Liu,Junxiang Chen,Pingwei Cai,Zhenhai Wen
标识
DOI:10.1016/j.apcatb.2021.120737
摘要
It is highly desirable to make full use of photogenerated charge carriers by elaborately designing high-efficiency multifunctional photocatalysts with achieving bi-value-added production. Herein, we report the photocatalyst with ultrathin ZnIn2S4 nanosheets decorating polypyrrole nanotubes, thanks to the matched bandgap, is capable of harvesting visible light for photocatalysis, during which the photoexcited electrons and holes are used for H2 evolution and 1,4-benzenedimethanol (BDM) upgrading oxidation, respectively. Comprehensive experiments and density functional theory calculations indicate that the photoinduced electrons tend to be transferred to the inner PPy nanotubes of [email protected] composite for photocatalytic H2 generation, while the photoexcited holes favorably oxidize BDM into 1,4-phthalaldehyde (PAD) on outer ZIS nanosheets of [email protected] composite. The optimized [email protected] exhibits an apparent quantum efficiency of 6.43% (at 420 nm) for photocatalytic H2 evolution and BDM valorization into PAD at a rate of 735 μmol g−1 h−1, remarkably promoting the utilization efficiency of charge carriers.
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