Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, PR China; Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-sen University, Guangzhou 510275, PR China.
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, PR China.
Biosens Bioelectron. 2019 Jan 15;124-125:191-198. doi: 10.1016/j.bios.2018.10.012. Epub 2018 Oct 13.
In this work, Pt nanoparticles modified nanoporous AuSn(Pt@NP-AuSn) alloy on Ni buffered flexible carbon fiber paper (CFP) is fabricated by a simple replacement reaction in which NP-AuSn is fabricated by controllable dealloy of electrodeposited Au-Sn alloy films. The as prepared Pt@NP-AuSn/Ni/CFP possesses hierarchical pore structure, high specific surface area and excellent catalytic activity. Due to the bi-functions of both the large surface area of nanoporous metal and macroporous of carbon fiber paper facilitating mass transfer, the Pt@NP-AuSn/Ni/CFP shows high sensitivity of detecting ascorbic acid (AA), dopamine (DA) and uric acid (UA), with sensitivities of 0.14 μA μM cm, 15.23 μA μM cm, 0.28 μA μM cm under the concentration ranging from 200 to 2000 μM, 1-10 μM, and 25-800 μM for AA, DA and UA, respectively. Further, the Pt@NP-AuSn/Ni/CFP possesses long-term stability of sensing AA, DA and UA and presents great anti-interference towards a variety of common compounds in body fluid. All of these results manifest the Pt@NP-AuSn/Ni/CFP can be a promising candidate for the application of the electrochemical sensor for simultaneous detection of AA, DA and UA.
在这项工作中，通过简单的置换反应在 Ni 缓冲的柔性碳纤维纸 (CFP) 上制备了 Pt 纳米颗粒修饰的纳米多孔 AuSn(Pt@NP-AuSn) 合金，其中 NP-AuSn 是通过可控电沉积 Au-Sn 合金薄膜的脱合金反应制备的。所制备的 Pt@NP-AuSn/Ni/CFP 具有分级孔结构、高比表面积和优异的催化活性。由于纳米多孔金属的大表面积和碳纤维纸的大孔的双功能促进了质量传递，Pt@NP-AuSn/Ni/CFP 对检测抗坏血酸 (AA)、多巴胺 (DA) 和尿酸 (UA) 具有高灵敏度，其灵敏度分别为 0.14 μA μM cm、15.23 μA μM cm、0.28 μA μM cm，在 200 至 2000 μM、1-10 μM 和 25-800 μM 的 AA、DA 和 UA 浓度范围内。此外，Pt@NP-AuSn/Ni/CFP 对 AA、DA 和 UA 的传感具有长期稳定性，并对体液中多种常见化合物具有很强的抗干扰能力。所有这些结果表明，Pt@NP-AuSn/Ni/CFP 有望成为电化学传感器同时检测 AA、DA 和 UA 的应用的候选材料。
