Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province and College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, People's Republic of China.
Research Institute of Medicine and Pharmacy, Qiqihar Medical University, Qiqihar, 161006, People's Republic of China.
Mikrochim Acta. 2021 Jan 23;188(2):48. doi: 10.1007/s00604-021-04711-6.
A dense zeolitic imidazolate framework (ZIF) nanosheet is for the first time molded by reduced graphite oxide (RGO) and graphitic carbon nitride (g-CN) to fabricate an original 2D/2D/2D heterojunction (ZIF/g-CN/RGO nanohybrid), which is pipetted onto carbon cloth electrode (CCE) (ZIF/g-CN/RGO/CCE) as an electrochemical sensor. Profiting from the renowned synergistic and coupling effects, the resulting nanohybrid endows excellent electrocatalytic activity towards hydrazine. Amperometric detection reveals that the hybrid sensor possesses a low detection limit of 32 nM (S/N = 3) in a monitoring range of 0.0001 to 1.0386 mM, along with a high sensitivity 93.71 μA mM cm. Importantly, the minimum detection concentration of hydrazine in the actual sample is lower than the maximum allowable limit of the World Health Organization (WHO) and has high reproducibility (RSD = 4.82%). As expected, the high sensing capability of ZIF/g-CN/RGO combines the advantages of abundant surface-active sites and high conductivity along with 2D interfaces between ZIF, g-CN, and RGO nanosheets. This study provides a promising to expand 2D-based ternary nanojunction as a bridge for promoting sensing performance.Graphical abstract.
一种致密的沸石咪唑酯骨架（ZIF）纳米片首次通过还原氧化石墨（RGO）和石墨相氮化碳（g-CN）模压成型，制造出原始的 2D/2D/2D 异质结（ZIF/g-CN/RGO 纳米杂化体），然后将其滴涂在碳纤维布电极（CCE）上（ZIF/g-CN/RGO/CCE）作为电化学传感器。得益于著名的协同和耦合效应，所得纳米杂化体赋予了对肼的优异电催化活性。安培检测表明，该混合传感器在 0.0001 至 1.0386 mM 的监测范围内具有 32 nM（S/N = 3）的低检测限，以及 93.71 μA mM cm 的高灵敏度。重要的是，实际样品中肼的最低检测浓度低于世界卫生组织（WHO）的最大允许限量，且具有高重现性（RSD = 4.82%）。不出所料，ZIF/g-CN/RGO 的高传感能力结合了丰富的表面活性位点和高导电性以及 ZIF、g-CN 和 RGO 纳米片之间的 2D 界面的优势。这项研究为扩展基于 2D 的三元纳米结作为促进传感性能的桥梁提供了一种有前途的方法。
