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In-situ growth of 3D rosette-like copper nanoparticles on carbon cloth for enhanced sensing of ammonia based on copper electrodissolution
Analytica Chimica Acta ( IF 6.2 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.aca.2020.01.010
Shengfei Yang 1 , Guangchao Zang 1 , Qianyu Peng 1 , Jingchuan Fan 1 , Yangkun Liu 1 , Guangyuan Zhang 1 , Yinping Zhao 1 , Haomo Li 1 , Yuchan Zhang 1
Affiliation  

Copper is an attractive candidate for sensing ammonia. Here, an electrodissolution mechanism for measuring liquid-phase ammonia was developed via a novel three-dimensional rosette-like structure of copper nanoparticles (CuNPs) integrated onto carbon cloth (CuNPs/CC). A one-step hydrothermal synthetic procedure was employed to construct the metallic CuNPs with a stereo rosette-like pattern on flexible CC substrate. The morphology, composition and sensing performance of the as-prepared composite were characterised in detail. The CuNPs/CC composite showed excellent sensing performance to ammonia, which is attributed to the electrodissolution of CuNPs being promoted by ammonia to form a stabilised copper-ammonia complex. This electrochemical response occurs without the electro-oxidation of ammonia, thus avoiding the energy barrier of the N-N bond and the toxicity of N-adsorbates, which is advantageous for ammonia detection. In addition, the sensor also shows very high sensitivity to ammonia with a low detection limit, as well as good anti-interference performance, repeatability and stability. The high accuracy and precision for the quantification of ammonia concentration in a variety of real samples indicate that the CuNPs/CC composition has potential in the development of high-performance ammonia sensors.

中文翻译:

在碳布上原位生长 3D 玫瑰花状铜纳米颗粒,以增强基于铜电溶解的氨感测

铜是用于感测氨的有吸引力的候选者。在这里,通过集成到碳布(CuNPs / CC)上的铜纳米颗粒(CuNPs)的新型三维玫瑰花状结构开发了一种用于测量液相氨的电溶解机制。采用一步水热合成方法在柔性 CC 基板上构建具有立体花环状图案的金属 CuNPs。详细表征了所制备复合材料的形态、组成和传感性能。CuNPs/CC复合材料对氨表现出优异的传感性能,这归因于氨促进CuNPs的电溶解形成稳定的铜-氨络合物。这种电化学反应在没有氨的电氧化的情况下发生,从而避免了NN键的能垒和N-吸附物的毒性,有利于氨的检测。此外,该传感器还表现出非常高的氨灵敏度,检测限低,以及良好的抗干扰性能、重复性和稳定性。各种真实样品中氨浓度定量的高精度和精密度表明,CuNPs/CC 组合物在开发高性能氨传感器方面具有潜力。
更新日期:2020-04-01
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