Facile development of carbon quantum dot deposited titanate-based materials for environmental application

Synthesis of highly fluorescent carbon quantum dots from rubber seed shells for the adsorption and photocatalytic degradation of dyes

“…8 a that the CQDs showed 20% of MB adsorption after 30 min (dark reaction), while the CQDs showed about 30% CR removed by the adsorption. This is caused by the capacity of carbon-based quantum dot materials to have large surface areas, as well as the existence of carbonaceous species that are high in electronegative O atoms and sites of nitrogen acceptor in CR and MB molecules, which have a predilection for organic dye molecules 24 , 39 , 71 . After 20 min of treatment, the CQDs exhibited higher dye adsorption ability and displayed a further outstanding decolourization of MB and CR dyes.…”

“…After 20 min of treatment, the CQDs exhibited higher dye adsorption ability and displayed a further outstanding decolourization of MB and CR dyes. Although CQDs had limited capacity for dark reaction adsorption, the removal of dyes was nonetheless impressive because having a little amount of dyes adsorbed on the surface might act as a dye sensitizer, causing photosensitised degradation of dyes on the surfaces 39 , 73 , 74 . Amongst the organic dyes, because of their magnified photocatalytic activity as a result of their intense sunlight absorption, CQDs exhibited the best capacity to remove MB from the solution, along with the assistance from functional groups that make up the aromatic rings of MB, (C–S), (CN) and (CN= ), also known as a heterocyclic aromatic chemical compound.…”