TY - JOUR
T1 - Sustainable Chitin-Derived 2D Nanosheets with Hierarchical Ion Transport for Osmotic Energy Harvesting
AU - Xiang, Zhongrun
AU - Chen, Yu
AU - Xie, Zhijiang
AU - Yuan, Kaiyu
AU - Shu, Yue
AU - Chen, Pan
AU - Wang, Huiqing
AU - Ye, Dongdong
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024/9/26
Y1 - 2024/9/26
N2 - Generating electricity from salinity-gradient waters with nanofluidic structures is a promising approach for achieving zero-emission energy goals and addressing escalating energy crises. However, the ingenious design and development of biomass membranes that satisfy the requirements of sustainability, low-cost, long-term stability, and high output power density is a crucial challenge. This work reports two-dimensional (2D) hierarchical-structured chitin nanosheets (2D H-CNS) with abundant micro-/nano-pore structures through chemical modification, acid vapor treatment, and ultrasound-assisted exfoliation. The results showed that surface charge modification not only promotes the loosening and controllable exfoliation of the dense chitin structure into ultra-thin 2D H-CNS (1.34 nm) but also increases the porosity and enhances the ion transport flux and selectivity of the nanosheets. Furthermore, experimental and simulation confirm that hierarchical ion transport in nanosheet-assembled membranes (2D-HM) substantially enhances ion transport performance, with an 18.5 times improvement in ion conductance over dense nanosheet-assembled membranes (2D-DM). Furthermore, 2D-HM embedded in an energy harvesting system achieved an output power density of 2.59 W m−2, 2.51 times that of 2D-DM. This study promotes the development of all-biomass materials with high-performance osmotic energy harvesting.
AB - Generating electricity from salinity-gradient waters with nanofluidic structures is a promising approach for achieving zero-emission energy goals and addressing escalating energy crises. However, the ingenious design and development of biomass membranes that satisfy the requirements of sustainability, low-cost, long-term stability, and high output power density is a crucial challenge. This work reports two-dimensional (2D) hierarchical-structured chitin nanosheets (2D H-CNS) with abundant micro-/nano-pore structures through chemical modification, acid vapor treatment, and ultrasound-assisted exfoliation. The results showed that surface charge modification not only promotes the loosening and controllable exfoliation of the dense chitin structure into ultra-thin 2D H-CNS (1.34 nm) but also increases the porosity and enhances the ion transport flux and selectivity of the nanosheets. Furthermore, experimental and simulation confirm that hierarchical ion transport in nanosheet-assembled membranes (2D-HM) substantially enhances ion transport performance, with an 18.5 times improvement in ion conductance over dense nanosheet-assembled membranes (2D-DM). Furthermore, 2D-HM embedded in an energy harvesting system achieved an output power density of 2.59 W m−2, 2.51 times that of 2D-DM. This study promotes the development of all-biomass materials with high-performance osmotic energy harvesting.
KW - chitin
KW - exfoliation
KW - ion transport
KW - nanosheets
KW - osmotic energy harvesting
UR - http://www.scopus.com/inward/record.url?scp=85196527369&partnerID=8YFLogxK
U2 - 10.1002/aenm.202402304
DO - 10.1002/aenm.202402304
M3 - Article
AN - SCOPUS:85196527369
SN - 1614-6832
VL - 14
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 36
M1 - 2402304
ER -