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. 2021 Sep 14;13:194. doi: 10.1007/s40820-021-00695-3

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Schematic showing the synthesis of 3DGA@CDs-TNs photocatalyst. SEM images of b GO, c 3DGA inset: the picture of 3DGA; and d 3DGA@CDs-TNs, inset: the picture of 3DGA@CDs-TNs. TEM image of e GO, f 3DGA, and 3DGA@CDs-TNs g, and corresponding EDS. h–l mapping images for survey, C, N, O, and Ti in 3DGA@CDs-TNs photocatalyst. XPS spectra of 3DGA@CDs-TNs photocatalyst. m Survey spectrum, n C 1s, o O 1s, and p Ti 2p