Green emissive
Carbon quantum dots produced from Plantago Psyllium by thermal carbonization as
heterogenous catalyst
Fairlin Jenitha R. and Sudhaparimala S.
Res. J. Chem. Environ; Vol. 27(5); 15-21;
doi: https://doi.org/10.25303/2705rjce015021; (2023)
Abstract
The water retention and metal ion binding efficiency of Plantago Psyllium hemicellulose
has been well explored. But there are no reports available on its conversion to
carbon quantum dots (CQDs) for potential applications. This study is focused on
the correlation of the microstructural features of CQDs with its catalytic and emission
properties. The green synthesis of CQDs was explored using hemicellulose rich Plantago
psyllium as precursor by a one-step thermal carbonization approach. The functional
groups, microstructure, surface and the morphological analysis of CQDs indicate
the formation of zero-dimensional carbon material with predominately sp2 carbon
framework with oxygen and nitrogen atoms.
The characterization reports of the carbonized psyllium husk showed that the hemicellulose
rich biomass was converted into luminescent CQDs. The CQDs exhibited green emission
under the UV lamp. The experimental results of the adsorption study indicate that
the CQDs derived from hemicellulose can act as good adsorbent for the removal of
Xanthene-based dye. The obtained results promise the effective conversion of biomass
and potential application of CQDs as adsorption catalyst for the efficient and economic
removal of cationic dyes in waste water.
