Mn-doped Zn/Al layered double hydroxides as photocatalysts for the 4-chlorophenol photodegradation
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Abstract
Abstract Mn-doped Zn/Al layered double hydroxides (LDH) with Mn 0.5–3.0% mol respect to Zn content with improved photocatalytic degradation of 4-chlorophenol (4Clphenol) were studied. The characterization studies showed the isomorphic incorporation Mn as dopant until 1% mol. The 4Clphenol degradation was proposed as result of a combined effect of oxidation by both hydroxyl radicals (OH ) and photogenerated holes (h + ). In a proposed mechanism it is suggested that Mn enhances the charge separation acting as electron e − (Mn 3 + ; Mn 4 + ) or hole h + (Mn 2 + ; Mn 3 + ) traps according to its oxidation state. Exhaustive characterization through EDS, XRD, UV–vis-DRS, TEM-Dark field STEM, fluorescence spectroscopy for OH detection and XPS, has been done denoting the importance of the Mn content and its different oxidation states in the photophysical and photocatalytic properties of the Mn-doped Zn/Al-based layered double hydroxides.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Advanced Photocatalysis Techniques · Polyoxometalates: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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