Nitrogen doped carbon dots as a photocatalyst based on biomass: a life cycle assessment
Fecha
2023Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
AEI//PID2021-122736OB-C42 AEI//P20-00375 AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2021-122613OB-I00
Impacto
|
10.1016/j.jclepro.2023.138728
Resumen
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 ...
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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. [--]
Materias
Carbon dots,
Xylose,
Acid catalyst,
Biomass,
Nanoparticles,
Hydrothermal synthesis,
Photoluminescence,
Photocatalysis,
Life cycle assessment
Editor
Elsevier
Publicado en
Journal of Cleaner Production, 423 (2023), 138728
Departamento
Universidad Pública de Navarra. Departamento de Ciencias /
Nafarroako Unibertsitate Publikoa. Zientziak Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
This research was funded by the Spanish Ministry of Science and
Innovation (PID2021- 122736OB-C42), FEDER (European Union) funds
(PID2021-122736OB-C42, P20-00375, UMA20- FEDERJA88). M.A
thanks to the Spanish Ministry of Science and Innovation (MCIN/AEI/
10.13039/501100011033) through project PID2021-122613OB-I00.
This work was made in the framework of projects UIDB/00081/2020
(CIQUP), UIDB/05748/2020 (GreenUPorto), LA/P/00081/2020 (IMS),
and PTDC/QUI-QFI/2870/2020, funded by the Portuguese Foundation
for Science and Technology (FCT, Lisbon). Luís Pinto da Silva acknowledges
funding from FCT under the Scientific Employment Stimulus
(CEECINST/00069/2021), while S.F acknowledges FCT for funding
of her Ph.D. grant (2021. 05479.BD).