Опубликовано
2018-07-08
На SciPeople
2018-07-09
Журнал
Sunlight-Induced Photocatalytic Degradation of Pollutant Dye by Highly Fluorescent Red-Emitting Mg-N-Embedded Carbon Dots
Sunlight-Induced Photocatalytic Degradation of Pollutant Dye by Highly Fluorescent Red-Emitting Mg-N-Embedded Carbon Dots (ACS Sustainable Chemistry & Engineering)
A straightforward and simpler use of an age-old
technique was utilized for the fabrication of “red-emitting magnesium-nitrogen-embedded carbon dots” (r-Mg-N-CD) from the leaves extract of Bougainvillea plant as a natural
source of carbon. This technique is similar to the solvent-based technique, which is used for the extraction of fragrances and essential oils from flowers and leaves. The as-derived leaves
extract was further carbonized using a simple domestic microwave to obtain the small-sized red-emitting carbonaceous material as r-Mg-N-CD. The r-Mg-N-CD showed excitation independent
emissions at ∼678 nm with excellent photostability and a high quantum yield value (∼40%). Moreover,the important perspective of the present finding is to use this r-Mg-N-CD as a potential photocatalyst material for the
degradation of pollutant dye (methylene blue) under the presence of sunlight. To infer the significant influence of using natural
sunlight in the process of dye degradation, a comparative analysis was performed, demonstrating the higher rate of
photo degradation (∼6 times faster) under the influence of sunlight compared to the artificial visible-light from a 100 W tungsten
bulb.
Публикация
The present finding describes here discusses the possibilities for
fabricating low-cost, high-quantum-yield, red-emitting r-Mg-NCD
in an environment-friendly (without using any externally
added chemical reagent). Red-emitting r-Mg-N-CD was used as
a novel photocatalytic material for the aqueous phase
photodegradation of MB under the presence sunlight. The
vast potential of sunlight explored was compared with an
artificial tungsten bulb by the use of r-Mg-N-CD, which showed
many folds of increase in the rate of photodegradation under
the influence of sunlight. Higher in value of quantum yield,
solubility in aqueous media, and emission in the red wavelength
region along with the ability to photodegrade the pollutant dyes
within the ∼120 min of sunlight irradiation, makes r-Mg-N-CD
a potential nanomaterial for its applications in the field of
aqueous-phase photodegradation. As well, the embedded Mg
can also been replaced from some other metal for enhancing its
optical properties.
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