Pollutant Soot for Pollutant Dye Degradation: Soluble Graphene Nanosheets for Visible Light Induced Photodegradation of Methylene Blue

Abstract

The findings presented here offer a new approach for the environmental application of pollutant soot somewhat like utilizing a pollutant material for degrading the other pollutant material. Herein, a simpler approach is described for the isolation of two-dimensional graphitic materials as water-soluble graphene nanosheets (wsGNS) from the globally identified dirty−dangerous black pollutant particulate matter as black carbon (BC) from the petrol soot. The asisolated wsGNS are further employed for the photocatalytic degradation of toxic dye such as methylene blue (MB) under the influence of visible light irradiation. The photodegradation performance of wsGNS compared to insoluble graphene nanosheets (GNS) showed ∼11 times faster degradation rate within ∼90 min of visible light exposure (60 W tungsten bulb). The insights of the aqueous phase photodegradation of MB by the system of MB-wsGNS were studied by different chemical characterization techniques including nuclear magnetic resonance spectroscopy, high-performance liquid chromatography, Raman, and fourier transform infrared spectroscopy. Furthermore, we have checked the regeneration efficiency of wsGNS, which was still at its higher value even after five cycles of recycling testing.

Boosting Visible‐Light Photocatalytic Redox Reaction by Charge Separation in SnO2/ZnSe(N2H4)0.5 Heterojunction Nanocatalysts

“…Although electrochemical analysis is ap owerful analytical tool, organic dye degradatione xperimentsc an still provide intuitive evaluation results of the photocatalytic activity. [41][42][43][44][45][46] In these experiments, we employed visible light (l ! 400 nm) from an incident Xe lamp with cut-off filters to eliminate the direct decomposition effect of RhB by UV light.…”

Visible-light photocatalysis by carbon-nano-onion-functionalized ZnO tetrapods: degradation of 2,4-dinitrophenol and a plant-model-based ecological assessment

“…A crucial issue associated with nanomaterial-based photocatalysis is the sustainability of the overall process. Current research on photocatalytic water remediation is focused on the development of sustainable materials and the improvement in the degradation efficiency towards targeted pollutants, but it does not include the elimination of possible risk of environmental assessment 37,38 . Even after the complete degradation of organic pollutants, acute toxicity has been observed owing to the generation of toxic byproducts 4 .…”

Harnessing the Photocatalytic Potential of Polypyrroles in Water through Nanointervension: Synthesis and Photophysical Evaluation of Biodegradable Polypyrrolic Nanoencapsulates

“…Restriction of rotation could be achieved by (a) attaching boron difluoride (BF 2 ) to the nitrogen atoms of the dipyrromethane resulting in boron‐dipyrromethene (BODIPYs) or (b) by the addition of another substituted dipyrromethane unit yielding porphyrins . The extended conjugation alters the photophysical characteristics of those molecules including rising in the photophysical properties . Those properties could be further tuned by switching the functional groups adhered onto the structure.…”

“…[2] The extended conjugation alters the photophysical characteristics of those molecules including rising in the photophysical properties. [3,4] Those properties could be further tuned by switching the functional groups adhered onto the structure. Porphyrins are well known for their Soret bands [5,6] and large Stokes shifts, [7] while BODIPYs have very minimal Stokes shift.…”