Quantum dot synthesis from waste biomass and its applications in energy and bioremediation

Carbon-based catalyst for environmental bioremediation and sustainability: Updates and perspectives on techno-economics and life cycle assessment

“…Rapidly expanding human population and industrialization have resulted in an increase in global energy demand and thereof the production has not been able to keep up with the rising need Ahuja et al, 2022). Lively urbanization and growth in population have also led to the increase in pressure on agriculture sector that extremely affected the soil productivity and to fulfill the growing food demands, the excessive usage of pesticides and chemical fertilizers resulted in emission of greenhouse gas (Gaur et al, 2021a;Gaur and Manickam, 2021;Vijay et al, 2021;Vyas et al, 2022a).…”

Nanotechnology for the bioremediation of organic and inorganic compounds in aquatic ecosystem/marine ecosystem

“…Another example can be the use of carbon nanotube in place of cathode ray tubes in computers to avoid to the use of lead, reduce consumption of energy and avoid poisonous and toxic bioproduct development [40]. Many nanomaterials can be used for bioremediation of contaminants from marine systems, for example, nanotubes [41], carbon dots [42], quantum dots [43], and nanoparticles [44]. In an experiment organic dye was removed from wastewater with the help of copper oxide nanoparticles synthesized from the leaves extract of Citrus aurantifolia [45].…”

Improved citric acid-derived carbon dots synthesis through microwave-based heating in a hydrothermal pressure vessel

“…1,14 Bottom-up methods instead rely upon smaller organic chemicals such as citric acid, urea, malic acid, or even animal and plant products or biowaste. [15][16][17] Upon the application of heat on these smaller chemicals, the weakest bonds in the structure will break to allow the molecular fragments to reform into the comparatively larger CDs particles. Any functional groups present in the original organic chemical's structure can be retained as surface groups on the CDs, as indicated previously.…”

“…18 The choice of heating method and parameters, such as time and temperature, can impact both composition and yield of CDs. 17,18 Microwave heating can provide important benets over heating by a convection oven such as shortened reaction time and reduced energy output requirements due to rapid, localized, and uniform heating by the electromagnetic radiation. 1,17,19,20 However, the nal CDs produced by our MW method must be comparable or of better quality than the same type of CDs produced via an oven for these benets to be truly advantageous.…”

“…17,18 Microwave heating can provide important benets over heating by a convection oven such as shortened reaction time and reduced energy output requirements due to rapid, localized, and uniform heating by the electromagnetic radiation. 1,17,19,20 However, the nal CDs produced by our MW method must be comparable or of better quality than the same type of CDs produced via an oven for these benets to be truly advantageous. Various articles have been published over the validity of MW-based heating for CDs synthesis.…”