Graphene oxide interlayered Ga-doped FeSe2 nanorod: A robust nanocomposite with ideal electronic structure for electrochemical dopamine detection
作者： Anteneh F. Baye , Richard Appiah-Ntiamoah , John Amalraj , K. Koteshwara Reddy , Hern Kim
DOI: 10.1016/J.ELECTACTA.2020.137245
关键词:
摘要: Abstract Metal doping in the crystal lattice of metal selenide has proven to improve its conductivity and electrocatalytic activity. However, finding a suitable dopant that can tune electronic structure for effective biomolecular detection is still challenge. Herein, we investigate gallium (Ga3+) amine-functionalized graphene oxide (fGO) as an support FeSe2 using facile solvothermal hydrothermal method. The sensing ability resulting composite towards dopamine (DA) determined differential pulse voltammetry. Our results show Ga3+ effectively dopes by replacing Fe2+ maximizes at x = 0.7 (Ga0.7Fe0.3Se2) which leads enhanced sensitivity DA. Ga0.7Fe0.3Se2 unstable, non-selective detects DA high potential. Nevertheless, after intercalation between fGO sheets, stabilizes it able selectively detect significantly lower potential long time without loss synergy GaxFe1-xSe2 thus allows trace amounts be detected with LOD 110 nM within range 2-170 µM. This study shows excellent while sheets boost stability selectivity.
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