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. 2013 Jul 2;2(4):146–155. doi: 10.1002/open.201300013

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© 2013 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.

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Scheme 1 — Illustration of a potential tube reactor for water purification using sun light irradiation and β-Bi₂O₃ nanoparticles as photocatalysts. Similar systems were already tested in pilot-plant scale, e.g., HIDROCEN (Madrid, Spain).[3f, 19]