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논문 기본 정보

자료유형
학술저널
저자정보
Ruyuan Jiang (Chinese Academy of Sciences) Niantao Liu (Chinese Academy of Sciences) Yuhong Su (Xinjiang University) Sanshuang Gao (Chinese Academy of Sciences) Xamxikamar Mamat (Chinese Academy of Sciences) Thomas Wågberg (Umea University) Yongtao Li (Chinese Academy of Sciences) Xun Hu (University of Jinan) Guangzhi Hu (Chinese Academy of Sciences)
저널정보
성균관대학교 성균나노과학기술원 NANO NANO Vol.13 No.8
발행연도
2018.1
수록면
19 - 30 (12page)

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An integrative electroanalytical method was developed for detecting Cd2+ and Pb2+ ions in aqueous solutions. Polysulfide/graphene (RGO-S) nanocomposites were prepared and their performance as electrochemical sensors for Cd2+ and Pb2+ was evaluated. The RGO-S nanocomposite was carefully characterized by scanning electron microscopy with energy-dispersive X-ray spectrometry, transmission electron microscopy, and X-ray photoelectron spectroscopy. The as-prepared RGO-S was incorporated into a pyrolytic graphite electrode (RGO-S/PGE) and used for detecting trace amount of Cd2+ and Pb2+ by differential pulse anodic stripping voltammetry. Under optimal conditions, the stripping peak current of RGO-S/PGE varies linearly with heavy metal ion concentration in the ranges 2.0–300 μg L -1 for Cd2+ and 1.0–300 μg L -1 for Pb2+. The limits of detection for Cd2+ and Pb2+ were estimated to be about 0.67 μg L -1 and 0.17 μg L -1, respectively. The prepared electrochemical heavy-metal-detecting electrode provides good repeatability and reproducibility with high sensitivity, making it a suitable candidate for monitoring Cd2+ and Pb2+ concentrations in aqueous environmental samples.

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