Layered double hydroxide/boron nitride nanocomposite membranes for efficient separation and photodegradation of water-soluble dyes

Widespread access to clean water is becoming increasingly scarce due to various factors, including increasing urbanisation and industrialisation, biodiversity loss, and climate change. The development of innovative and sustainable methods of water purification are urgently required. Herein, we repor...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2023-06, Vol.11 (23), p.12266-12281
Main Authors: Coogan, Áine, Doménech, Natalia García, Mc Ginley, Donagh, Simonian, Tigran, Rafferty, Aran, Fedix, Quentin, Donlon, Amy, Nicolosi, Valeria, Gun'ko, Yurii K
Format: Article
Language:English
Subjects:
Biodiversity
Biodiversity loss
Boron
Boron nitride
Climate change
Dyes
Filtration
Hydroxides
Membrane processes
Membranes
Methylene blue
Nanocomposites
Nanofiltration
Nanotechnology
Photodegradation
Rhodamine
Sustainable development
Urbanization
Water purification
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Summary:Widespread access to clean water is becoming increasingly scarce due to various factors, including increasing urbanisation and industrialisation, biodiversity loss, and climate change. The development of innovative and sustainable methods of water purification are urgently required. Herein, we report the development of new, high-performance nanofiltration (NF) membranes based on a recyclable CuAl-CO 3 LDH/BNOx nanocomposite. These membranes have demonstrated up to 100% retention of Evans blue, methyl orange, methylene blue and rhodamine B, and exceptional water flux. Furthermore, the presence of CuAl-CO 3 LDH induces up to 91% photodegradation of these dyes under visible light conditions in 120 minutes using a household LED lamp, acting as a potential low-cost, viable solution to membrane fouling. Importantly, this is the first report of Evans blue degradation by a visible-light active LDH photocatalyst. We believe that this work represents a significant step forward in advanced nanofiltration technology. New CuAl-CO 3 LDH/BNOx nanocomposite membranes demonstrate excellent dye retention characteristics and superior flow rates, as well as efficient photocatalysis for applications in membrane anti-fouling.
ISSN:2050-7488
2050-7496
DOI:10.1039/d3ta01581e