Synthesis of a semi-conductor-like MOF with black phosphorous as a composite for visible light-driven photocatalysis

The fabrication of nanocomposites of a metal-organic framework with two-dimensional materials for photocatalytic water splitting and environmental remediation has been the focus of the scientific community for many years now. In the work reported here, MIL-125 (Ti) was functionalized using few-layer...

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Bibliographic Details
Published in:RSC advances 2019-11, Vol.9 (64), p.37321-3733
Main Authors: Hlophe, Philani Vusumuzi, Dlamini, Langelihle Nsikayezwe
Format: Article
Language:English
Subjects:
Charge transfer
Chemistry
Composite materials
Conductors
Diffuse reflectance spectroscopy
Electrochemical impedance spectroscopy
Electromagnetic absorption
Electron microscopy
Metal-organic frameworks
Microscopy
Morphology
Nanocomposites
P-n junctions
Photocatalysis
Photoluminescence
Spectrum analysis
Titanium
Two dimensional materials
Ultraviolet reflection
Water splitting
Water treatment
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Summary:The fabrication of nanocomposites of a metal-organic framework with two-dimensional materials for photocatalytic water splitting and environmental remediation has been the focus of the scientific community for many years now. In the work reported here, MIL-125 (Ti) was functionalized using few-layer black phosphorus (FLBP) via a two-step hydrothermal and sonication approach. The as-synthesized composite materials were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL) spectroscopy. The techniques revealed that the nanocomposites exhibited circular blocks and a sheet-like morphology; they also showed enhanced visible light absorption and thus could be applied in visible-light-driven photocatalytic water treatment or water splitting. Electrochemical impedance spectroscopy (EIS) showed that the composite referred to as 4%BpMIL displayed the lowest recombination of all the composites (MIL-125(Ti) > 12%BpMIL> 6%BpMIL > 4%BpMIL > FLBP) with high effectual charge transfer between FLBP and MIL-125(Ti) via a p-n junction. The fabrication of nanocomposites of a metal-organic framework with two-dimensional materials for photocatalytic water splitting and environmental remediation has been the focus of the scientific community for many years now.
ISSN:2046-2069
2046-2069
DOI:10.1039/c9ra08296d