Influences of chemical treatment on sludge derived biochar; Physicochemical properties and potential sorption mechanisms of lead (II) and methylene blue

Carbon‐based composite nanofibers for photocatalytic degradation of methylene blue dye under visible light

“…The oxidative destruction of dye occurs during the photolysis process, where oxygen and dye electrons combine to generate singlet oxygen atoms 20 . Photoexcited electrons are promoted to the conduction band (e−) while photogenerated holes remain in the valence band (h+) in the photocatalytic process when photocatalyst (PAN/CQDs/GO) is exposed to light with a band gap energy larger than or equal to their band gap energy 8,27–29 . Hydroxyl radicals (•OH) are created when holes (h+) and water interact, while electrons (e) combine with water to form hydroxyl radicals (•OH) 24 …”

“…Here, graphite oxide‐coated PAN nanofibers supported with CQDs can effectively improve the access of active sites due to their physiochemical and optical properties for the photodegradation of methylene blue under UV light in the liquid phase. Experimental research was done on the composite photocatalyst formed by highly expanded graphite and CQDs based on adsorption characteristics 7–13 . Graphite hexagonal atomic structure can serve as a foundation for the epitaxial growth of other hexagonal nanostructures such as ZnO, TiO 2 , and CQDs.…”

“…The durability and stability of photocatalysts are additionally analyzed. The successful completion of this task directly contributes to the significance of the work of the photocatalyst and offers a theoretical foundation and practical direction for the advancement of more effective photocatalytic instruments based on carbon nanomaterials in the future 8–10 . Furthermore, a composite was employed to investigate the influence of main operating variables including pH, visible irradiation time, initial dye concentration, and photocatalyst dosage on dye photo‐degradation efficiency and the photocatalytic photodegradation effect on the mechanical property (tensile strength) after four cycles by comparing various trials during the elimination of MB was explored.…”

“…Experimental research was done on the composite photocatalyst formed by highly expanded graphite and CQDs based on adsorption characteristics. [7][8][9][10][11][12][13] Graphite hexagonal atomic structure can serve as a foundation for the epitaxial growth of other hexagonal nanostructures such as ZnO, TiO 2 , and CQDs. Furthermore, graphite-based semiconductor composites significantly enhance the photocatalytic properties of these host materials.…”

Bamboo as a source for value added products: Paving way to global circular economy

“…Different alkali chemical agents like KOH and NaOH can be applied to enhance surface functionality and negativity. Phosphoric acid (H3PO4), hydrogen peroxide (H2O2), and potassium carbonate (K2CO3) upgrade pore structure providing more active surface binding sites to the biochar (Shahib et al 2022). Activated bamboo biochar can display a significantly higher surface area than wood charcoal and is effective for adsorption of pollutants due to its improved texture.…”