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The morphology modulation of graphene to produce wrinkles and folds for effective electrochemical determination of Hg(II) |
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| Authors: | Yao Liu Cheng-Cheng Bi Qian-Xin Bao Rohan Weerasooriya Xing Chen |
| Affiliation: | 1. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 P. R. China
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009 P. R. China Yao Liu and Cheng-Cheng Bi contributed equally to this work.;2. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 P. R. China School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009 P. R. China Yao Liu and Cheng-Cheng Bi contributed equally to this work.;3. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 P. R. China School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009 P. R. China;4. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 P. R. China National Centre for Water Quality Research, National Institute of Fundamental Studies Hantana, Kandy, Sri Lanka;5. Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 P. R. China |
| Abstract: | A highly efficient electrode material, three-dimensional reduced graphene oxide with varying wrinkles and folds (WRGO), applicable for electrochemical determination of Hg(II) was obtained by treating graphene oxide (GO) with KOH aqueous solution. After alkaline etching, the relatively flat graphene was altered and its self-aggregation was significantly alleviated, producing more wrinkles and folds, which provided more active adsorption sites for heavy metal ions. WRGO-5 modified electrode system herein offers a highest sensitivity of (31.83 μAμM−1) and a lowest LOD of (16.28 nM). Moreover, the electrode sensor possesses good stability and reproducibility. |
| Keywords: | alkaline etching electrochemical determination graphene Hg(II) |
