Usama Zafar, P. Rai, Ankur Gupta, J.G. Korvink, V. Badilita, Monsur Islam
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Irradiation by an infrared laser with optimized parameters results in the thermochemical decomposition of the Cu/chitosan composite, rapidly forming a nanocomposite material featuring highly graphitized and porous carbon materials. Elemental mapping confirms the formation of the nanocomposite, although no crystalline phases of copper are observed during X-ray diffraction. This can be attributed to the rapid nature of the laser-carbonization process. The nanocomposite material is further demonstrated for electrochemical sensing of hydrogen peroxide (H2O2), exhibiting a sensitivity of 2.65 mM−1 for concentrations ranging from 0.01 mM to 0.1 mM H2O2, and 0.01 ± 0.01 mM−1 for concentrations from 0.1 to 10 mM H2O2. These sensitivities are comparable to other non-enzymatic H2O2 biosensors. 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引用次数: 0
摘要
本研究以阳极电沉积铜(Cu)/壳聚糖凝胶为新型前驱体,通过激光诱导碳化合成铜/碳纳米复合材料。金属/碳纳米复合材料与单独的金属/碳纳米复合材料相比具有更优越的性能,在各种应用领域,尤其是涉及电化学现象的应用领域中脱颖而出。然而,它们的合成过程往往既复杂又耗时。在这里,我们整合了阳极电沉积和激光诱导碳化技术,从而获得了一种快速、简单、廉价的金属/碳纳米复合材料合成方法。通过在铜阳极上进行阳极电沉积,获得了涉及铜配位壳聚糖薄膜的前驱复合材料。采用优化参数的红外激光进行辐照后,铜/壳聚糖复合材料发生热化学分解,迅速形成具有高度石墨化和多孔碳材料特征的纳米复合材料。元素图谱证实了纳米复合材料的形成,尽管在 X 射线衍射中没有观察到铜的结晶相。这可归因于激光碳化过程的快速性。该纳米复合材料还被进一步用于过氧化氢(H2O2)的电化学传感,在浓度为 0.01 mM 至 0.1 mM H2O2 的情况下,灵敏度为 2.65 mM-1;在浓度为 0.1 至 10 mM H2O2 的情况下,灵敏度为 0.01 ± 0.01 mM-1。这些灵敏度与其他非酶类 H2O2 生物传感器相当。这项研究成果标志着一种快速简便的金属/碳纳米复合材料合成方法,对生物传感器领域具有重大意义。
Laser-Induced Copper/Carbon Nanocomposite from Anodically Electrodeposited Chitosan for H2O2 Sensing
This work presents anodically electrodeposited copper (Cu)/chitosan gel as a novel precursor for synthesizing a Cu/carbon nanocomposite through laser-induced carbonization. Metal/carbon nanocomposites offering advantageous properties compared to their individual counterparts stand out in various applications, particularly in those involving electrochemical phenomena. However, their synthesis often suffers from complicated and time-consuming synthesis procedures. Here, we integrate anodic electrodeposition and laser-induced carbonization to yield a rapid, simple, and inexpensive procedure for synthesizing metal/carbon nanocomposite. A precursor composite involving Cu-coordinated chitosan film is achieved through anodic electrodeposition on a copper anode. Irradiation by an infrared laser with optimized parameters results in the thermochemical decomposition of the Cu/chitosan composite, rapidly forming a nanocomposite material featuring highly graphitized and porous carbon materials. Elemental mapping confirms the formation of the nanocomposite, although no crystalline phases of copper are observed during X-ray diffraction. This can be attributed to the rapid nature of the laser-carbonization process. The nanocomposite material is further demonstrated for electrochemical sensing of hydrogen peroxide (H2O2), exhibiting a sensitivity of 2.65 mM−1 for concentrations ranging from 0.01 mM to 0.1 mM H2O2, and 0.01 ± 0.01 mM−1 for concentrations from 0.1 to 10 mM H2O2. These sensitivities are comparable to other non-enzymatic H2O2 biosensors. The finding of this work signifies a rapid and facile method for synthesizing metal/carbon nanocomposites with strong implications for the field of biosensors.