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Room Temperature Fabrication of Macroporous Lignin Membranes for the Scalable Production of Black Silicon
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Biomacromolecules, Volume 23, issue 6, pp. 2512–2521
Abstract
Rising global demand for biodegradable materials and green sources of energy has brought attention to lignin. Herein, we report a method for manufacturing standalone lignin membranes without additives for the first time to date. We demonstrate a scalable method for macroporous (∼100 to 200 nm pores) lignin membrane production using four different organosolv lignin materials under a humid environment (>50% relative humidity) at ambient temperatures (∼20 °C). A range of different thicknesses is reported with densely porous films observed to form if the membrane thickness is below 100 nm. The fabricated membranes were readily used as a template for Ni2+ incorporation to produce a nickel oxide membrane after UV/ozone treatment. The resultant mask was etched via an inductively coupled plasma reactive ion etch process, forming a silicon membrane and as a result yielding black silicon (BSi) with a pore depth of >1 μm after 3 min with reflectance <3% in the visible light region. We anticipate that our lignin membrane methodology can be readily applied to various processes ranging from catalysis to sensing and adapted to large-scale manufacturing.
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Publisher Copyright: © 2022 The Authors. Published by American Chemical Society.
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Prochukhan, N, O'Brien, S A, Davó-Quiñonero, A, Trubetskaya, A, Cotter, E, Selkirk, A, Senthamaraikannan, R, Ruether, M, McCloskey, D & Morris, M A 2022, 'Room Temperature Fabrication of Macroporous Lignin Membranes for the Scalable Production of Black Silicon', Biomacromolecules, vol. 23, no. 6, pp. 2512–2521. https://doi.org/10.1021/acs.biomac.2c00228