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Endowing Graphene Superior Cations/Anions Co-purification and Visible Photocatalysis Performances by In-Situ Deposition of Silver Compound

Abstract

Conventional adsorbents were usually subject to problems such as low adsorption capacity, poor single performance, difficulty in recovery and processing, etc., when confronted the anfractuous highly toxic waste water containing abundant cations and anions. In order to overcome these problems, a fascinating regular honeycomb-like structure of Ag2O/reduced graphene oxide (Ag2O/rGO) aerogel was skillfully fabricated via self-assembly/reduction of graphene oxide and in-situ deposition of Ag2O nanoparticles. Here, the participation of Ag2O gifted the ability of rGO to selectively adsorb anions, which allowed the resultant Ag2O/rGO aerogels to own the potential to safely and efficiently co-purify toxic anions/cations. Wonderfully, the resulting Ag2O/rGO aerogels not only exhibited fast co-removal kinetic rate and superior co-capture performance toward several kinds of cationic/anionic pairs (Sr2+ ≈ 1.75 and Br- ≈4.32 mmol g-1, Cs+ ≈ 0.86 and I- ≈ 5.24 mmol g-1, etc), but also showed an additional excellent visible-light photocatalytic activity towards MB (90% of 15 mg ml-1 MB was degraded within 60 min). Furthermore, Ag2O/rGO aerogels with moldable shape solved the problem of adsorbents easy to loss and difficult to post-processing. Additionally, the as-fabricated Ag2O/rGO compounds possess an outstanding adsorption capacity to other cations or anions, such as Pb2+, Cu2+, Rb2+, Cr3+, S2-, SO42-, SO32-, and PO43-, etc. Therefore, Ag2O/rGO aerogels could be served as an efficient and practical adsorbents for the hyper-complex water remediation.

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Publication details

The article was received on 13 Jul 2017, accepted on 07 Sep 2017 and first published on 07 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06107B
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Endowing Graphene Superior Cations/Anions Co-purification and Visible Photocatalysis Performances by In-Situ Deposition of Silver Compound

    Y. Xiong, C. Wang, H. Wang, C. Jin, Q. Sun and X. Xu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06107B

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