Graphene-Anchored Cuprous Oxide Nanoparticles from Waste Electric Cables for Electrochemical Sensing
Graphene-Anchored Cuprous Oxide Nanoparticles from Waste Electric Cables for Electrochemical Sensing
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DOI：
10.1021/acssuschemeng.8b02510
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发表时间：
2018-09-01
影响因子：
8.4
通讯作者：
McLamore, E. S.
中科院分区：
文献类型：
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作者：
Abdelbasir, S. M.;El-Sheikh, S. M.;McLamore, E. S.
我们展示了使用从回收材料合成的纳米氧化亚铜开发用于行星健康应用的电化学纳米传感器。用从废电缆中释放的铜增强激光刻划的石墨烯电极，并使用乳糖作为还原剂和四种不同的表面活性剂作为封端剂，通过低温沉淀合成氧化亚铜纳米球。这些激光刻划电极是一种低成本、无光刻的直接合成柔性碳电路的方法。通过将纳米颗粒锚定到柔性石墨烯电极上来制造传感器，然后比较每种表面活性剂的材料特性和传感器性能。表面活性剂的分子量和端基对纳米粒子的尺寸、带隙、铁磁响应和电子传输起着重要的作用。作为原理的证明，我们展示了使用最好的材料开发用于行星健康应用的儿茶酚胺和汞传感器。多巴胺传感器在300 nM至5 μ M范围内呈线性，检测限为200 nM，响应时间为2.4 +/- 0.7 s，灵敏度为30 nA μ M cm（2）。汞传感器的线性范围为0.02 - 2.5 ppm，检测限为25 ppb，响应时间为
We demonstrate development of electrochemical nanosensors for planetary health applications using nanocuprous oxide synthesized from recycled materials. Laser-scribed graphene electrodes were enhanced with copper liberated from waste cables, and cuprous oxide nanospheres were synthesized via precipitation at low temperature using lactose as a reducing agent and four different surfactants as capping agents. These laser-scribed electrodes are a low-cost, lithography-free approach to direct synthesis of flexible carbon circuits. Sensors were fabricated by anchoring nanoparticles to flexible graphene electrodes, and then material properties and sensor performance were compared for each surfactant. Surfactant molecular weight and terminal group played an important role in nanoparticle size, band gap, ferromagnetic response, and electron transport. As proof of principle, we show development of catecholamine and mercury sensors for planetary health applications using the best material. Dopamine sensors were linear from 300 nM to 5 mu M, with a detection limit of 200 nM, response time of 2.4 +/- 0.7 s, and sensitivity of 30 nA mu M cm(2). Mercury sensors were linear from 0.02 to 2.5 ppm, with a detection limit of 25 ppb, response time of