期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 24, 页码 27578-27586出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c06081
关键词
hybrid perovskite; photocatalysis; interface activation; core@shell structure; stabilization
资金
- Hong Kong General Research Fund [152156/17E]
- Hong Kong Research Grants Council [C4006-17G, PolyU 123384/16P]
- Hong Kong Polytechnic University [1-ZE1C]
- Clarea Au for the Endowed Professorship in Energy [847S]
To address the poor stability of lead halide perovskite nanoparticles (NPs), monodisperse methylammonium lead bromide (MAPbBr(3), M-PE) NPs were successfully encapsulated with a thin layer (10 nm) of poly(norepinephrine) (PNE) by in situ polymerization. The PNE layer endowed M-PE NPs with high structural stability against severe environmental conditions. Furthermore, the chemical interaction between M-PE and PNE facilitates the construction of the core@shell composite, as well as contributes to the enhanced light-harvesting capacity and improved photoelectronic conversion efficiency in photocatalytic activity. The encapsulated NP M-PE@PNE with a band gap of 2.04 eV degraded the organic pollutant of malachite green by 81% in less than 2 h under visible light, which was 4.5 times higher than pristine M-PE NPs. This work provides a practical approach to stabilize and boost the MAPbX(3) photocatalyst and carries enormous potential in wide engineering applications.
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