Modified tunicate nanocellulose liquid crystalline fiber as closed loop for recycling platinum-group metals
- Modified tunicate nanocellulose liquid crystalline fiber as closed loop for recycling platinum-group metals
- 황준연; 김승민; 정현수; 홍승기; 유하영; 홍혜진; 박민상
- Platinum group metal (PGM); Recycle; Nanocellulose; Liquid crystal; Catalyst; Closed loop
- Issue Date
- Carbohydrate polymers
- VOL 228, 115424
- Rising demand and elemental rarity requires the recycling of precious metals such as platinum group elements (PGMs). Recently, biosorption has been focused on the capability of recovering precious metals, but in practice, recycling is inefficient or far away from a closed-loop material system. Here we use a polyethylenimine (PEI)-grafted spun-fiber made of cellulose nanofibril (CNF) extracted from a tunicate as a biosorbent for PGMs. Liquid crystallinity (LC) of TCNF suspension appears to contribute the generation of well-developed open porous structure in the fiber. We show the fiber has the selectivity and high capacity of Pt (120.2  mg/g, 86%) and Pd (26.5  mg/g, 74.2%) adsorption under the presence of other metals in simulated automobile waste. The adsorbed Pt and Pd with nano-scale clusters were uniformly distributed on the porous surface, which were directly applied as a catalyst. These results propose an easy approach to recover precious metals and reuse them directly, thereby closing loops of metal recycling.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.