Nitrogen doped carbon dots as a photocatalyst based on biomass: a life cycle assessment

Date

2023

Authors

Rodríguez-Carballo, Gabriela
Moreno-Tost, Ramón
Fernandes, Sónia
Esteves da Silva, Joaquim C.G.
Pinto da Silva, Luís
Castro Galiano, Eulogio

Director

Publisher

Elsevier
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

  • AEI//PID2021-122736OB-C42/
  • AEI//P20-00375/
  • AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2021-122613OB-I00/
Impacto

Abstract

The effectiveness of various transition metal phosphate-based acid catalysts, including vanadium and niobium, in the hydrothermal synthesis of carbon dots (CDs), has been assessed. Two sources of carbohydrates were employed for this: commercial xylose and liquor of xylose produced by processing olive pits. Catalysts were identified using the NH3-TPD, DTA/TG, XRD, and XPS techniques. The reaction was conducted for 4 h at a temperature of 180 °C. The existence of such nanoparticles, regardless of the carbohydrate source, was confirmed by an analysis of the features and characteristics of CDs nanoparticles. N-doped CDs with increased fluorescence were also created at the same time using a similar hydrothermal technique, and their photocatalytic activity was investigated. A Life Cycle Assessment (LCA) was conducted for both syntheses with the goal of comparing the environmental effects of the synthesis from commercial xylose to the synthesis from biomass. It was revealed that, although energy is the primary driver of both synthesis pathways' effect categories, the fundamental variations that seem to determine their relative sustainability are connected to the nature of the carbon precursor. Regarding the latter, it is determined that electricity has the greatest environmental impact.

Description

Keywords

Carbon dots, Xylose, Acid catalyst, Biomass, Nanoparticles, Hydrothermal synthesis, Photoluminescence, Photocatalysis, Life cycle assessment

Department

Ciencias / Zientziak / Institute for Advanced Materials and Mathematics - INAMAT2

Faculty/School

Degree

Doctorate program

item.page.cita

Rodríguez-Carballo, G., Moreno-Tost, R., Fernandes, S., Esteves Da Silva, J. C. G., Pinto Da Silva, L., Galiano, E. C., & Algarra, M. (2023). Nitrogen doped carbon dots as a photocatalyst based on biomass. A life cycle assessment. Journal of Cleaner Production, 423, 138728. https://doi.org/10.1016/j.jclepro.2023.138728

item.page.rights

© 2023 The Authors. This is an open access article under the CC BY-NC license.

Licencia

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