Highly recyclable gold nanoparticle films on lithium-ion battery separator for efficient catalytic conversion: Insights from 2D correlation spectroscopy analysis
writer：Lingui Hu; Yulu Ye; Tuo Li; Minqiang Xia; Yunbo Li *
keywords：Gold nanoparticles Nitrophenol Lithium-ion battery separator Film catalyst Two-dimensional correlation spectroscopy
source：期刊
specific source：Journal of Environmental Chemical Engineering 2025, 13, 117341
Issue time：2025年
To develop highly recyclable and efficient catalytic materials is
pivotal for sustainable treatment of wastewater. Herein, gold
nanoparticle (AuNP) films immobilized on a lithium-ion battery separator
were fabricated via a facile vacuum filtration method, demonstrating
exceptional catalytic activity and recyclability for the conversion of
nitrophenols and azo dyes. This porous separator architecture provided
abundant anchoring sites for AuNPs, enabling rapid substrate diffusion
and minimizing nanoparticle aggregation. Under optimized conditions
(1000?mM NaBH?), the AuNP film achieved complete catalytic conversion of
2-nitrophenol to 2-aminophenol within 36?min. Remarkably, the film
retained >?98?% efficiency over 8 consecutive cycles, underscoring
its robust reusability. Two-dimensional correlation spectroscopy
(2D-COS) elucidated the reaction mechanism, revealing that
nitrophenolate ions (415?nm) dominated the conversion kinetics, followed
by the slower formation of aminophenol (295?nm). The AuNP film also
exhibited versatility, converting 4-nitrophenol (32?min), methylene blue
(8?min), and methyl orange (15?min) efficiently. The synergy between
the separator’s hierarchical porosity and AuNP’s catalytic activity
facilitated electron transfer and active hydrogen generation. This work
presents a scalable, low-cost strategy for industrial pollutant
remediation, leveraging recyclable AuNP films and advanced spectroscopic
analysis to bridge material design and environmental application.