Publication: Green and sustainable zero-waste conversion of water hyacinth (: Eichhornia crassipes) into superior magnetic carbon composite adsorbents and supercapacitor electrodes
Issued Date
2019-01-01
Resource Type
ISSN
20462069
Other identifier(s)
2-s2.0-85070472460
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
RSC Advances. Vol.9, No.42 (2019), 24248-24258
Suggested Citation
Amonrada Saning, Servann Herou, Decha Dechtrirat, Chanoknan Ieosakulrat, Pasit Pakawatpanurut, Sulawan Kaowphong, Chanchana Thanachayanont, Maria Magdalena Titirici, Laemthong Chuenchom Green and sustainable zero-waste conversion of water hyacinth (: Eichhornia crassipes) into superior magnetic carbon composite adsorbents and supercapacitor electrodes. RSC Advances. Vol.9, No.42 (2019), 24248-24258. doi:10.1039/c9ra03873f Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50542
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Green and sustainable zero-waste conversion of water hyacinth (: Eichhornia crassipes) into superior magnetic carbon composite adsorbents and supercapacitor electrodes
Abstract
© 2019 The Royal Society of Chemistry. Troublesome aquatic weed, water hyacinth (Eichhornia crassipes) was converted into solid and liquid fractions via green and energy-saving hydrothermal carbonization (HTC). The solid product, hydrochar, was employed as a precursor to prepare magnetic carbon materials by simple activation and magnetization using KOH and Fe3+ ions, respectively. The obtained magnetic adsorbent possessed good magnetic properties and presented outstanding capacities to adsorb methylene blue (524.20 mg g-1), methyl orange (425.15 mg g-1) and tetracycline (294.24 mg g-1) with rapid adsorption kinetics even at high concentrations (up to 500 mg L-1), attributed to high specific surface area and mesopore porosity. Besides the solid hydrochar, the water-soluble liquid product was used to fabricate carbon-based supercapacitors through facile KOH activation with a considerably lower KOH amount in comparison to conventional activation. The supercapacitor electrode made from activated liquid product possessed an extremely high specific surface area of 2545 cm2 g-1 and showed excellent specific capacitance (100 F g-1 or 50 F cm-3 at 1 A g-1) and good retention of capacitance (92% even after 10000 cycles). This work demonstrated that both solid and liquid HTC fractions from this bio-waste can serve as effective sources to prepare functional carbon materials, making this approach a sustainable zero-waste biomass conversion process.