Journal
CRYSTENGCOMM
Volume 23, Issue 42, Pages 7496-7501Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ce01133b
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Funding
- National Natural Science Foundation [21902060]
- Project of Development and Reform Commission of Jilin Province [2021C036-7]
- Natural Science Foundation Project of Jilin Province [20180623042TC, YDZJ202101ZYTS078, YDZJ202101ZYTS073]
- Project of Education Department of Jilin Province [JJKH20191015KJ, JJKH20180776KJ]
- Graduate innovation program of Jilin Normal University [201939]
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In this study, an Ag(i)-organic framework [Ag-3(psa)(4,4 '-bpy)(3)]·OH·2CH(3)OH·2H(2)O (JLNU-91) was synthesized using phenylsuccinic acid and 4,4'-bipyridine at room temperature, showing improved photocatalytic activities for the degradation of methyl orange. The self-reduced Ag-0's surface plasmon resonance effect promoted the separation of photoinduced electron-hole pairs, playing a crucial role in the photodegradation of MO.
To investigate the facile synthesis strategy for MOF-based plasmonic photocatalysts, an Ag(i)-organic framework [Ag-3(psa)(4,4 '-bpy)(3)]center dot OH center dot 2CH(3)OH center dot 2H(2)O (JLNU-91) was prepared by employing phenylsuccinic acid (H(2)psa) and 4,4 '-bipyridine (4,4 '-bpy) under room temperature. Under the irradiation of UV light, the separated Ag(i) sites in the framework can be reduced to metallic Ag-0, producing a series of Ag-0-doped JLNU-91/x. The photocatalytic experiments indicate that the JLNU-91/x samples display improved photocatalytic activities for the degradation of methyl orange (MO) and the optimal JLNU-91/1 has a 2.2 times higher degradation kinetic constant than pure JLNU-91. The photocurrent responses and EIS plots demonstrate that the SPR effect of the self-reduced Ag-0 promotes the separation of photoinduced electron-hole pairs. Moreover, the electron spin resonance (ESR) spectra and capture experiments reveal that O2-, OH and the holes play important roles in the photodegradation of MO. This work brings a new insight into the development of MOF-based plasmonic photocatalysts.
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