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Utilization of cellulose-based carbon nanodots in sulfonated polysulfone based membrane for direct methanol fuel cell
- Source :
- South African Journal of Chemical Engineering, Vol 48, Iss , Pp 265-275 (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- Sulfonated polysulfone (SPS) composite membranes consisting of cellulose-based carbon nanodots (CNDs) were successfully prepared as a proton exchange membrane (PEM) for direct methanol fuel cell (DMFC) applications. The CNDs were prepared using the top-down hydrothermal method. The structure transformation from cellulose to CNDs was confirmed by the FTIR and XRD analysis. The particle size of CNDs was between 1 and 3 nm. The particles exhibited good optical properties. The incorporation of CND into matrix polymer increased the thermal stability of the membranes. Morphology analysis of the SPS/CND composite membranes revealed that CNDs had been successfully dispersed within the SPS polymer matrix. The cross-linking between SPS and CNDs enhanced the proton conductivity of the composite membranes compared to the pristine SPS membrane. The SPS/CND-1 (1 wt%) exhibited the highest selectivity with a proton conductivity of 35.5 mS.cm−1 and a methanol permeability of 3.50 × 10−6 cm2.s−1. The experimental results indicate that the incorporation of CNDs into the SPS membrane also decreased the amount of methanol that can pass through the membrane when used in DMFCs.
- Subjects :
- Carbon nanodots
Cellulose
DMFC
Sulfonated polysulfone
Chemical engineering
TP155-156
Subjects
Details
- Language :
- English
- ISSN :
- 10269185
- Volume :
- 48
- Issue :
- 265-275
- Database :
- Directory of Open Access Journals
- Journal :
- South African Journal of Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.fc21366294ed410b8149853db752ba64
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.sajce.2024.02.009