Abstract In this approach, Co3O4@Er2O3 nanorods (NRs) were prepared by a wet-chemical method using reducing agents in alkaline medium. The resulting nanoparticles were characterized in details by UV/Vis and FT-IR spectroscopy, X-ray powder diffraction, Elemental dispersive analysis (EDS) coupled with field-emission scanning electron microscopy (FESEM). Co3O4@Er2O3NRs were deposited on a glassy carbon electrode (GCE) to give a selective sensor with a fast response toward 4-hexyl resorcinol (4-HR) in phosphate buffer phase (PBS) by electrochemical approach. The 4-HR sensor also displays good sensitivity, large linear dynamic range, lowest detection limit, and long-term stability, and enhanced electrochemical response. The calibration plot is linear over the 0.1 nM–0.01 M 4-HR concentration range. The sensitivity is ∼14.765 μAμM−1cm−2, and the detection limit is 64.29 pM (signal-to-noise ratio, at a SNR of 3). We also discuss possible future prospective uses of this doped metal oxide semiconductor nanomaterial in terms of chemical sensing.

中文翻译：

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基于湿化学制备的 Co 3 O 4 @Er 2 O 3 纳米棒的 4-己基间苯二酚传感器开发：实用方法

摘要 在这种方法中，Co3O4@Er2O3 纳米棒（NRs）是通过湿化学方法在碱性介质中使用还原剂制备的。通过紫外/可见光和 FT-IR 光谱、X 射线粉末衍射、元素色散分析 (EDS) 和场发射扫描电子显微镜 (FESEM) 对所得纳米颗粒进行了详细表征。Co3O4@Er2O3NRs 沉积在玻璃碳电极 (GCE) 上，通过电化学方法提供了一种对磷酸盐缓冲相 (PBS) 中的 4-己基间苯二酚 (4-HR) 具有快速响应的选择性传感器。4-HR 传感器还显示出良好的灵敏度、大的线性动态范围、最低检测限和长期稳定性，以及增强的电化学响应。校准图在 0.1 nM–0.01 M 4-HR 浓度范围内呈线性。灵敏度为 ∼14.765 μAμM−1cm−2，检测限为 64.29 pM（信噪比，SNR 为 3）。我们还讨论了这种掺杂金属氧化物半导体纳米材料在化学传感方面未来可能的应用前景。