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editorial

. 2016 Jun 13;11:292. doi: 10.1186/s11671-016-1503-9

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 8 — Photocatalytic degradation of HCHO solution by AC/TiO₂, N-AC/TiO₂, Cu-AC/TiO₂, and Cu–N-AC/TiO₂ and the comparison experiments